/* ============================================
   PORTFOLIO - MASTER STYLESHEET
   Module 2: Full Design System
   ============================================ */

/* ==========================================================
   1. DESIGN TOKENS (CSS CUSTOM PROPERTIES)
   ========================================================== */
:root {
    /* ----------------------------------------
       1a. BRAND COLORS
       ---------------------------------------- */
    --primary: #6c5ce7;
    --primary-light: #a29bfe;
    --primary-dark: #4a3db8;
    --primary-rgb: 108, 92, 231;
    --primary-contrast: #ffffff;
    --primary-tint: rgba(var(--primary-rgb), 0.08);
    --primary-glow: rgba(var(--primary-rgb), 0.3);
    --primary-glow-strong: rgba(var(--primary-rgb), 0.55);

    --secondary: #00cec9;
    --secondary-light: #55efc4;
    --secondary-dark: #00a8a4;
    --secondary-rgb: 0, 206, 201;
    --secondary-contrast: #04201f;
    --secondary-tint: rgba(var(--secondary-rgb), 0.08);
    --secondary-glow: rgba(var(--secondary-rgb), 0.3);

    --accent: #fd79a8;
    --accent-light: #fab1d0;
    --accent-dark: #e84393;
    --accent-rgb: 253, 121, 168;
    --accent-contrast: #ffffff;
    --accent-tint: rgba(var(--accent-rgb), 0.08);
    --accent-glow: rgba(var(--accent-rgb), 0.3);

    /* ----------------------------------------
       1b. SEMANTIC COLORS
       ---------------------------------------- */
    --success: #2ed573;
    --success-rgb: 46, 213, 115;
    --success-tint: rgba(var(--success-rgb), 0.1);
    --success-glow: rgba(var(--success-rgb), 0.3);

    --danger: #ff4757;
    --danger-rgb: 255, 71, 87;
    --danger-tint: rgba(var(--danger-rgb), 0.1);
    --danger-glow: rgba(var(--danger-rgb), 0.3);

    --warning: #ffa502;
    --warning-rgb: 255, 165, 2;
    --warning-tint: rgba(var(--warning-rgb), 0.1);

    --info: #0abde3;
    --info-rgb: 10, 189, 227;
    --info-tint: rgba(var(--info-rgb), 0.1);

    /* ----------------------------------------
       1c. NEUTRAL / GRAY SCALE
       ---------------------------------------- */
    --gray-50:  #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #15171a;
    --white: #ffffff;
    --black: #000000;

    /* ----------------------------------------
       1d. BACKGROUNDS & SURFACES
       ---------------------------------------- */
    --bg-primary: #0a0a1a;
    --bg-secondary: #0f0f2a;
    --bg-tertiary: #151535;
    --bg-footer: #080814;
    --bg-card: #1a1a3e;
    --bg-card-hover: #222255;
    --surface: #1e1e42;
    --surface-hover: #2a2a5a;
    --surface-border: rgba(var(--primary-rgb), 0.15);
    --surface-border-strong: rgba(var(--primary-rgb), 0.3);

    /* ----------------------------------------
       1e. TEXT COLORS
       ---------------------------------------- */
    --text-primary: #ffffff;
    --text-secondary: #b8b8d4;
    --text-muted: #6e6e8a;
    --text-accent: #a29bfe;

    /* ----------------------------------------
       1f. GRADIENTS
       ---------------------------------------- */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-primary-reverse: linear-gradient(135deg, var(--secondary), var(--primary));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
    --gradient-sunset: linear-gradient(135deg, var(--accent), var(--warning));
    --gradient-ocean: linear-gradient(135deg, var(--primary), var(--info));
    --gradient-bg: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
    --gradient-card: linear-gradient(135deg, rgba(var(--primary-rgb), 0.1), rgba(var(--secondary-rgb), 0.1));
    --gradient-card-hover: linear-gradient(135deg, rgba(var(--primary-rgb), 0.25), rgba(var(--secondary-rgb), 0.25));
    --gradient-glow: linear-gradient(135deg, var(--primary-glow), var(--secondary-glow));

    /* ----------------------------------------
       1g. SHADOWS
       ---------------------------------------- */
    --shadow-xs: 0 1px 4px rgba(0, 0, 0, 0.15);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.5);
    --shadow-inner: inset 0 2px 6px rgba(0, 0, 0, 0.4);
    --shadow-primary: 0 8px 30px var(--primary-glow);
    --shadow-secondary: 0 8px 30px var(--secondary-glow);
    --shadow-accent: 0 8px 30px var(--accent-glow);
    --shadow-success: 0 8px 30px var(--success-glow);
    --shadow-glow: 0 0 30px var(--primary-glow);
    --shadow-glow-strong: 0 0 60px var(--primary-glow);

    /* ----------------------------------------
       1h. TYPOGRAPHY
       ---------------------------------------- */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: clamp(1.8rem, 4vw, 2.5rem);
    --fs-display: clamp(2.5rem, 6vw, 4.5rem);
    --fs-hero: clamp(2.75rem, 8vw, 5.5rem);

    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;
    --fw-black: 900;

    --lh-tight: 1.2;
    --lh-normal: 1.6;
    --lh-relaxed: 1.8;

    --ls-tight: -0.03em;
    --ls-normal: 0;
    --ls-wide: 0.08em;
    --ls-wider: 0.15em;

    /* ----------------------------------------
       1i. SPACING SCALE
       ---------------------------------------- */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 2.5rem;
    --space-8: 3rem;
    --space-9: 4rem;
    --space-10: 5rem;
    --space-11: 6rem;
    --space-12: 8rem;

    --section-padding: 7.5rem 0;
    --section-padding-sm: 4.5rem 0;

    --container-max: 1200px;
    --container-gap: 1.5rem;

    /* ----------------------------------------
       1j. BORDER RADII
       ---------------------------------------- */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-pill: 999px;
    --radius-round: 50%;

    /* Border widths */
    --border-width: 1px;
    --border-width-thick: 2px;

    /* ----------------------------------------
       1k. TRANSITIONS & TIMING
       ---------------------------------------- */
    --duration-fast: 0.15s;
    --duration-base: 0.3s;
    --duration-slow: 0.5s;
    --duration-slower: 0.8s;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: all var(--duration-fast) var(--ease-out);
    --transition-base: all var(--duration-base) var(--ease-out);
    --transition-slow: all var(--duration-slow) var(--ease-out);
    --transition-spring: all var(--duration-base) var(--ease-spring);

    /* ----------------------------------------
       1l. Z-INDEX SCALE
       ---------------------------------------- */
    --z-preloader: 9999;
    --z-navbar: 1000;
    --z-modal: 1050;
    --z-tooltip: 1070;
    --z-back-to-top: 999;
}

/* ==========================================================
   2. RESET & BASE
   ========================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::selection {
    background: var(--primary);
    color: var(--white);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--secondary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul,
ol {
    list-style: none;
    margin: 0;
    padding: 0;
}

button {
    font-family: inherit;
}

hr {
    border-color: var(--surface-border);
    opacity: 1;
}

/* ==========================================================
   3. TYPOGRAPHY
   ========================================================== */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--fs-display);
    font-weight: var(--fw-black);
}

h2 {
    font-size: var(--fs-3xl);
}

h3 {
    font-size: var(--fs-xl);
}

h4 {
    font-size: var(--fs-lg);
}

h5 {
    font-size: var(--fs-md);
}

h6 {
    font-size: var(--fs-base);
}

p {
    margin-bottom: var(--space-4);
}

/* Display */
.display-hero {
    font-size: var(--fs-hero);
    font-weight: var(--fw-black);
    line-height: 1.05;
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    color: var(--text-primary);
}

/* Lead */
.lead-text {
    font-size: var(--fs-md);
    font-weight: var(--fw-regular);
    line-height: var(--lh-relaxed);
    color: var(--text-secondary);
}

/* Section heading block */
.section-title {
    text-align: center;
    margin-bottom: var(--space-8);
}

.section-title h2,
.section-kicker + h2 {
    margin-bottom: var(--space-4);
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-pill);
}

.section-kicker {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--primary-light);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    display: block;
    margin-bottom: var(--space-2);
}

.section-subtitle {
    color: var(--text-muted);
    font-size: var(--fs-md);
    max-width: 600px;
    margin: var(--space-4) auto 0;
}

/* Font family helpers */
.mono {
    font-family: var(--font-mono);
}

/* Weight utilities */
.fw-light   { font-weight: var(--fw-light); }
.fw-regular { font-weight: var(--fw-regular); }
.fw-medium  { font-weight: var(--fw-medium); }
.fw-semibold{ font-weight: var(--fw-semibold); }
.fw-bold    { font-weight: var(--fw-bold); }
.fw-extrabold { font-weight: var(--fw-extrabold); }
.fw-black   { font-weight: var(--fw-black); }

/* Letter spacing */
.ls-tight { letter-spacing: var(--ls-tight); }
.ls-wide  { letter-spacing: var(--ls-wide); }
.ls-wider { letter-spacing: var(--ls-wider); }

/* Line height */
.lh-tight   { line-height: var(--lh-tight); }
.lh-normal  { line-height: var(--lh-normal); }
.lh-relaxed { line-height: var(--lh-relaxed); }

/* Font size utilities */
.fs-xs { font-size: var(--fs-xs); }
.fs-sm { font-size: var(--fs-sm); }
.fs-base { font-size: var(--fs-base); }
.fs-md { font-size: var(--fs-md); }
.fs-lg { font-size: var(--fs-lg); }
.fs-xl { font-size: var(--fs-xl); }
.fs-2xl { font-size: var(--fs-2xl); }

/* ==========================================================
   4. GRADIENTS / TEXT GRADIENTS
   ========================================================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-sunset {
    background: var(--gradient-sunset);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-ocean {
    background: var(--gradient-ocean);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: var(--gradient-primary) !important;
}

.bg-gradient-accent {
    background: var(--gradient-accent) !important;
}

/* ==========================================================
   5. TEXT COLOR UTILITIES
   ========================================================== */
.text-primary-color { color: var(--primary); }
.text-secondary-color { color: var(--secondary); }
.text-accent-color { color: var(--accent); }
.text-success-color { color: var(--success); }
.text-danger-color { color: var(--danger); }
.text-warning-color { color: var(--warning); }
.text-info-color { color: var(--info); }
.text-muted-color { color: var(--text-muted); }
.text-strong { color: var(--text-primary); }
.text-soft { color: var(--text-secondary); }

/* Background tint utilities */
.bg-primary-tint { background: var(--primary-tint); }
.bg-secondary-tint { background: var(--secondary-tint); }
.bg-accent-tint { background: var(--accent-tint); }
.bg-success-tint { background: var(--success-tint); }
.bg-danger-tint { background: var(--danger-tint); }
.bg-warning-tint { background: var(--warning-tint); }

/* Surface background utilities */
.bg-card { background: var(--bg-card); }
.bg-card-hover { background: var(--bg-card-hover); }
.bg-surface { background: var(--surface); }
.bg-tertiary { background: var(--bg-tertiary); }
.bg-primary-surface { background: var(--bg-primary); }
.bg-secondary-surface { background: var(--bg-secondary); }

/* Border utilities */
.border-soft { border: var(--border-width) solid var(--surface-border); }
.border-strong { border: var(--border-width) solid var(--surface-border-strong); }

/* ==========================================================
   6. BUTTONS
   ========================================================== */
.btn {
    font-family: var(--font-primary);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-base);
    padding: 0.85rem 1.9rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    line-height: 1;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    transition: transform var(--transition-base), box-shadow var(--transition-base),
                background-color var(--transition-base), color var(--transition-base),
                border-color var(--transition-base);
    isolation: isolate;
}

.btn:focus-visible {
    outline: 2px solid var(--primary-light);
    outline-offset: 3px;
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

.btn i {
    transition: transform var(--transition-base);
}

.btn:hover i.bi-arrow-right,
.btn:hover i.bi-arrow-up-right {
    transform: translateX(4px) translateY(-1px);
}

.btn:hover i.bi-arrow-left {
    transform: translateX(-4px);
}

/* ---- Variants ---- */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--primary-contrast);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
    color: var(--primary-contrast);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--primary-glow-strong);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), var(--info));
    color: var(--secondary-contrast);
    box-shadow: 0 4px 16px var(--secondary-glow);
}

.btn-secondary:hover {
    color: var(--secondary-contrast);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--secondary-glow);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--accent-contrast);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-accent:hover {
    color: var(--accent-contrast);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: var(--border-width-thick) solid var(--surface-border-strong);
    box-shadow: none;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--primary-tint);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    box-shadow: none;
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--primary-tint);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: var(--border-width) solid var(--surface-border-strong);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: none;
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.btn-success {
    background: var(--success);
    color: var(--white);
    box-shadow: 0 4px 16px var(--success-glow);
}

.btn-success:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--success-glow);
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
    box-shadow: 0 4px 16px var(--danger-glow);
}

.btn-danger:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--danger-glow);
}

.btn-light-solid {
    background: var(--white);
    color: var(--gray-800);
}

.btn-light-solid:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-dark-solid {
    background: var(--gray-900);
    color: var(--white);
    border: var(--border-width) solid var(--gray-700);
}

.btn-dark-solid:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Backwards-compatible aliases from Module 1 */
.btn-primary-custom,
.btn-outline-custom {
    font-family: var(--font-primary);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-base);
    padding: 0.85rem 1.9rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    line-height: 1;
    text-decoration: none;
    transition: transform var(--transition-base), box-shadow var(--transition-base),
                background-color var(--transition-base), color var(--transition-base),
                border-color var(--transition-base);
}

.btn-primary-custom {
    background: var(--gradient-primary);
    color: var(--primary-contrast);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary-custom:hover {
    color: var(--primary-contrast);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--primary-glow-strong);
}

.btn-outline-custom {
    background: transparent;
    color: var(--text-primary);
    border: var(--border-width-thick) solid var(--surface-border-strong);
}

.btn-outline-custom:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--primary-tint);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.btn-primary-custom:active,
.btn-outline-custom:active {
    transform: translateY(1px) scale(0.98);
}

.btn-primary-custom i,
.btn-outline-custom i {
    transition: transform var(--transition-base);
}

.btn-primary-custom:hover i.bi-arrow-right,
.btn-outline-custom:hover i.bi-arrow-right {
    transform: translateX(4px);
}

/* ---- Sizes ---- */
.btn-sm {
    font-size: var(--fs-sm);
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    font-size: var(--fs-md);
    padding: 1.05rem 2.5rem;
    border-radius: var(--radius-lg);
}

.btn-pill {
    border-radius: var(--radius-pill);
}

.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: var(--radius-md);
    font-size: var(--fs-lg);
}

.btn-icon.btn-sm {
    width: 38px;
    height: 38px;
    font-size: var(--fs-base);
}

.btn-icon.btn-lg {
    width: 58px;
    height: 58px;
    font-size: var(--fs-2xl);
}

.btn-block {
    width: 100%;
    display: flex;
}

/* ---- Ripples/effects ---- */
.btn-shine {
    position: relative;
}

.btn-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: skewX(-25deg);
    transition: left var(--duration-slow) var(--ease-out);
    z-index: 1;
}

.btn-shine:hover::before {
    left: 150%;
}

.btn-gradient-animated {
    background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
    background-size: 300% 300%;
    animation: gradientShift 6s ease infinite;
    color: #fff;
}

.btn-gradient-animated:hover {
    color: #fff;
    transform: translateY(-2px);
}

/* ---- Disabled & Loading ---- */
.btn[disabled],
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn.is-loading {
    pointer-events: none;
    opacity: 0.85;
}

.btn.is-loading .btn-spinner {
    width: 18px;
    height: 18px;
    border-radius: var(--radius-round);
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    animation: spinnerRotate 0.6s linear infinite;
}

/* ==========================================================
   7. CARDS
   ========================================================== */
.card-custom {
    background: var(--bg-card);
    border: var(--border-width) solid var(--surface-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: transform var(--transition-base), border-color var(--transition-base),
                box-shadow var(--transition-base), background-color var(--transition-base);
}

.card-custom:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
    background: var(--bg-card-hover);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    color: var(--primary-light);
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}

.card-custom:hover .card-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: scale(1.1) rotate(-3deg);
}

.card-title {
    color: var(--text-primary);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-3);
}

.card-text {
    color: var(--text-muted);
    font-size: var(--fs-base);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-4);
}

/* --- Card: glass --- */
.card-glass {
    background: rgba(255, 255, 255, 0.04);
    border: var(--border-width) solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: transform var(--transition-base), border-color var(--transition-base),
                box-shadow var(--transition-base), background-color var(--transition-base);
}

.card-glass:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(var(--primary-rgb), 0.4);
    box-shadow: var(--shadow-glow);
}

/* --- Card: gradient border (padding hack) --- */
.card-gradient-border {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    isolation: isolate;
}

.card-gradient-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: -1;
    opacity: 0.6;
    transition: opacity var(--transition-base);
}

.card-gradient-border:hover::before {
    opacity: 1;
}

/* --- Card: hover lift only --- */
.card-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* --- Card: scale grow --- */
.card-grow {
    transition: transform var(--transition-spring);
}

.card-grow:hover {
    transform: scale(1.03);
}

/* --- Card: image top (project style) --- */
.card-img-top-custom {
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: var(--border-width) solid var(--surface-border);
    transition: transform var(--transition-base), border-color var(--transition-base),
                box-shadow var(--transition-base);
}

.card-img-top-custom:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.card-img-top-custom .card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.card-img-top-custom .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.card-img-top-custom:hover .card-image img {
    transform: scale(1.08);
}

.card-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(10, 10, 26, 0.9) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: flex-end;
    padding: var(--space-5);
}

.card-img-top-custom:hover .card-image-overlay {
    opacity: 1;
}

/* --- Card body helpers --- */
.card-body-custom {
    padding: var(--space-5);
}

.card-body-custom .card-title {
    margin-bottom: var(--space-2);
}

.card-body-custom .card-text {
    margin-bottom: var(--space-4);
}

/* ==========================================================
   8. BADGES & TAGS
   ========================================================== */
.badge-custom,
.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    letter-spacing: var(--ls-wide);
    padding: 0.35rem 0.8rem;
    border-radius: var(--radius-pill);
    color: var(--primary-light);
    background: var(--primary-tint);
    border: var(--border-width) solid var(--surface-border);
    transition: all var(--transition-base);
}

.tech-badge:hover {
    border-color: var(--primary);
    background: var(--primary-tint);
    transform: translateY(-2px);
}

.tech-badge.badge-solid {
    background: var(--gradient-primary);
    color: #fff;
    border: none;
}

.badge-outline {
    background: transparent;
    border: var(--border-width) solid var(--surface-border-strong);
}

.badge-outline:hover {
    border-color: var(--secondary);
    color: var(--secondary-light);
}

/* ==========================================================
   9. SHADOW UTILITIES
   ========================================================== */
.shadow-xs { box-shadow: var(--shadow-xs) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
.shadow-inner { box-shadow: var(--shadow-inner) !important; }
.shadow-primary { box-shadow: var(--shadow-primary) !important; }
.shadow-secondary { box-shadow: var(--shadow-secondary) !important; }
.shadow-accent { box-shadow: var(--shadow-accent) !important; }
.shadow-glow { box-shadow: var(--shadow-glow) !important; }
.shadow-glow-strong { box-shadow: var(--shadow-glow-strong) !important; }
.shadow-none { box-shadow: none !important; }

/* ==========================================================
   10. GLASSMORPHISM
   ========================================================== */
.glass {
    background: rgba(255, 255, 255, 0.04);
    border: var(--border-width) solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.glass-strong {
    background: rgba(255, 255, 255, 0.08);
    border: var(--border-width) solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

/* ==========================================================
   11. BACKGROUND PATTERNS
   ========================================================== */
.bg-grid {
    background-image:
        linear-gradient(rgba(var(--primary-rgb), 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--primary-rgb), 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
}

.bg-dots {
    background-image: radial-gradient(rgba(var(--primary-rgb), 0.08) 1px, transparent 1px);
    background-size: 24px 24px;
}

.bg-radial-fade {
    background:
        radial-gradient(ellipse at center, rgba(var(--primary-rgb), 0.12) 0%, transparent 70%),
        var(--bg-primary);
}

/* ==========================================================
   12. SPACING UTILITIES
   ========================================================== */
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-7 { margin-top: var(--space-7); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-7 { margin-bottom: var(--space-7); }
.mb-8 { margin-bottom: var(--space-8); }

.py-section { padding-block: var(--section-padding); }
.py-section-sm { padding-block: var(--section-padding-sm); }

/* Section component */
.portfolio-section {
    padding: var(--section-padding);
    position: relative;
}

.portfolio-section-sm {
    padding: var(--section-padding-sm);
    position: relative;
}

/* ==========================================================
   13. RESPONSIVE TEXT & DISPLAY HELPERS
   ========================================================== */
.text-hide-desktop { display: none; }

@media (max-width: 991.98px) {
    .text-center-tb { text-align: center; }
}

/* ==========================================================
   14. FORM CONTROLS (foundation for Module 12)
   ========================================================== */
.form-control-custom {
    background: var(--surfer, var(--bg-card));
    border: var(--border-width) solid var(--surface-border-strong);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 0.85rem 1.15rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base),
                background-color var(--transition-base), transform var(--transition-fast);
}

.form-control-custom::placeholder {
    color: var(--text-muted);
}

.form-control-custom:focus {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 4px var(--primary-tint);
    transform: translateY(-1px);
}

.form-control-custom.is-invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 4px var(--danger-tint);
}

.form-control-custom.is-valid {
    border-color: var(--success);
    box-shadow: 0 0 0 4px var(--success-tint);
}

.form-label-custom {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    margin-bottom: var(--space-2);
}

.form-error {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--danger);
    font-size: var(--fs-sm);
    margin-top: var(--space-2);
    animation: shake 0.4s var(--ease-in-out);
}

.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .input-icon {
    position: absolute;
    top: 50%;
    left: 1rem;
    transform: translateY(-50%);
    color: var(--text-muted);
    transition: color var(--transition-base);
}

.form-input-wrapper .input-icon + .form-control-custom {
    padding-left: 2.8rem;
}

.form-input-wrapper:focus-within .input-icon {
    color: var(--primary-light);
}

.form-help {
    color: var(--text-muted);
    font-size: var(--fs-xs);
    margin-top: var(--space-2);
}

/* ==========================================================
   15. COMPONENTS (from Module 1, upgraded styles)
   ========================================================== */

/* ---------- Preloader ---------- */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-preloader);
    transition: opacity var(--duration-slow) var(--ease-out), visibility var(--duration-slow) var(--ease-out);
}

#preloader::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(var(--primary-rgb), 0.08) 0%, transparent 60%);
}

#preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-inner {
    text-align: center;
    position: relative;
}

.preloader-ring {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-5);
}

.preloader-ring::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-round);
    background: conic-gradient(from 0deg, var(--primary), var(--secondary), var(--accent), var(--primary));
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 4px));
            mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 4px));
    animation: rotate 1.1s linear infinite;
}

.preloader-ring::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: var(--radius-round);
    border: 1px dashed var(--surface-border-strong);
    animation: rotateReverse 12s linear infinite;
}

.preloader-ring-inner {
    position: absolute;
    inset: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-inner);
}

.preloader-logo {
    font-family: var(--font-mono);
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: preloaderPulse 1.5s ease-in-out infinite;
}

.preloader-percent {
    font-size: var(--fs-lg);
    font-weight: var(--fw-semibold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: var(--ls-wide);
    margin-bottom: var(--space-2);
}

.preloader-text {
    color: var(--text-muted);
    font-size: var(--fs-xs);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
}

/* ---------- Navbar ---------- */
.navbar {
    padding: 20px 0;
    background: transparent;
    transition: all var(--transition-base);
    z-index: var(--z-navbar);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 10, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: var(--border-width) solid var(--surface-border);
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-family: var(--font-mono);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    display: inline-flex;
    align-items: center;
    gap: 2px;
}

.brand-bracket {
    color: var(--primary);
    transition: color var(--transition-base);
}

.brand-bracket:hover .brand-bracket,
.navbar-brand:hover .brand-bracket {
    color: var(--secondary);
}

.brand-name {
    color: var(--text-primary);
}

.navbar-nav .nav-link {
    color: var(--text-secondary);
    font-weight: var(--fw-medium);
    font-size: var(--fs-sm);
    padding: 8px 18px !important;
    position: relative;
    transition: color var(--transition-base);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-pill);
    transition: width var(--transition-base);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-primary);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 60%;
}

/* Toggler */
.navbar-toggler {
    border: none;
    padding: 5px;
    box-shadow: none !important;
}

.navbar-toggler:focus {
    outline: 2px solid var(--surface-border-strong);
    outline-offset: 2px;
}

.navbar-toggler-icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 28px;
    height: 22px;
    position: relative;
}

.toggler-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-pill);
    transition: all var(--transition-base);
    position: absolute;
}

.toggler-line:nth-child(1) { top: 0; }
.toggler-line:nth-child(2) { top: 50%; transform: translateY(-50%); }
.toggler-line:nth-child(3) { bottom: 0; }

.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(2) {
    opacity: 0;
}

.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* Drawer: default = inline navbar content (desktop) */
.nav-drawer {
    display: flex;
    align-items: center;
    flex-grow: 1;
}

.nav-drawer-header {
    display: none;
}

.nav-drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1040;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

body.drawer-open {
    overflow: hidden;
}

/* ---------- Hero ---------- */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg .grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(var(--primary-rgb), 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--primary-rgb), 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-bg .gradient-orb {
    position: absolute;
    border-radius: var(--radius-round);
    filter: blur(80px);
    opacity: 0.4;
    will-change: transform;
}

.hero-bg .orb-1 {
    width: 420px;
    height: 420px;
    background: var(--primary);
    top: 18%;
    right: 8%;
    animation: floatSlow 9s ease-in-out infinite;
}

.hero-bg .orb-2 {
    width: 320px;
    height: 320px;
    background: var(--secondary);
    bottom: 18%;
    left: 4%;
    animation: float 7s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    color: var(--primary-light);
    margin-bottom: var(--space-4);
}

.hero-name {
    font-size: var(--fs-hero);
    font-weight: var(--fw-black);
    line-height: 1.05;
    margin-bottom: var(--space-3);
}

.hero-title {
    font-family: var(--font-mono);
    font-size: clamp(1.15rem, 2.5vw, 1.75rem);
    color: var(--secondary);
    margin-bottom: var(--space-5);
}

.hero-description {
    font-size: var(--fs-md);
    max-width: 550px;
    margin-bottom: var(--space-8);
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-9);
}

.hero-social {
    display: flex;
    gap: var(--space-4);
}

.hero-social .social-link {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-round);
    border: var(--border-width) solid var(--surface-border-strong);
    color: var(--text-secondary);
    font-size: var(--fs-md);
    transition: all var(--transition-base);
    text-decoration: none;
}

.hero-social .social-link:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--primary-tint);
    transform: translateY(-3px) rotate(-6deg);
    box-shadow: var(--shadow-glow);
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-frame {
    width: 350px;
    height: 350px;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    position: relative;
    border: var(--border-width-thick) solid var(--surface-border-strong);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.hero-image-frame:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.hero-image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-3xl);
    color: var(--primary-light);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    z-index: 1;
}

.scroll-indicator span {
    font-size: var(--fs-xs);
    color: var(--text-muted);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
}

.scroll-indicator .mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: var(--radius-md);
    position: relative;
}

.scroll-indicator .mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-light);
    border-radius: var(--radius-pill);
    animation: scrollWheel 2s ease-in-out infinite;
}

/* ---------- Back to top ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: var(--radius-round);
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-md);
    z-index: var(--z-back-to-top);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    box-shadow: 0 4px 16px var(--primary-glow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px var(--primary-glow-strong);
}

/* ---------- Floating WhatsApp button ---------- */
.btn-whatsapp-float {
    position: fixed;
    bottom: 90px;
    right: 30px;
    z-index: var(--z-back-to-top);
    width: 52px;
    height: 52px;
    border-radius: var(--radius-round);
    background: #25d366;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.btn-whatsapp-float i {
    transform: translateY(0);
}

.btn-whatsapp-float:hover,
.btn-whatsapp-float:focus-visible {
    color: #fff;
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 10px 28px rgba(37, 211, 102, 0.6);
    outline: none;
}

.btn-whatsapp-float::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-round);
    background: #25d366;
    z-index: -1;
    animation: waPulse 2.6s ease-out infinite;
}

@keyframes waPulse {
    0%   { transform: scale(1);   opacity: 0.5; }
    100% { transform: scale(1.75); opacity: 0; }
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--bg-footer);
    border-top: var(--border-width) solid var(--surface-border);
    padding-top: var(--space-6);
    text-align: center;
}

.footer-inner {
    max-width: 640px;
    margin: 0 auto;
}

.footer-main .brand-link {
    font-family: var(--font-mono);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    display: inline-flex;
    gap: 2px;
    text-decoration: none;
    margin-bottom: var(--space-4);
}

.footer-main .brand-link:hover {
    text-decoration: none;
}

.footer-desc {
    color: var(--text-muted);
    font-size: var(--fs-base);
    max-width: 46ch;
    margin: 0 auto var(--space-5);
}

.footer-contact {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2) var(--space-5);
    margin-bottom: var(--space-5);
    padding: 0;
    list-style: none;
}

.footer-contact li {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-muted);
    font-size: var(--fs-sm);
    word-break: break-word;
}

.footer-contact i {
    color: var(--primary-light);
}

.footer-contact a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-contact a:hover {
    color: var(--primary-light);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
}

.footer-social .social-link {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-round);
    border: var(--border-width) solid var(--surface-border-strong);
    color: var(--text-secondary);
    font-size: var(--fs-md);
    transition: all var(--transition-base);
    text-decoration: none;
}

.footer-social .social-link:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--primary-tint);
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
}

.footer-bottom {
    margin-top: var(--space-6);
    padding: var(--space-4) 0;
    border-top: var(--border-width) solid var(--surface-border);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: var(--fs-sm);
    margin-bottom: 0;
}

.footer-bottom .heart {
    color: var(--accent);
    display: inline-block;
    animation: heartBeat 1.6s ease-in-out infinite;
}

/* ---------- Section placeholders (until modules are built) ---------- */
.section-placeholder {
    text-align: center;
    padding: var(--space-8) 0;
    border: 2px dashed var(--surface-border-strong);
    border-radius: var(--radius-xl);
    color: var(--text-muted);
}

.section-placeholder i {
    font-size: var(--fs-3xl);
    color: var(--primary-light);
    margin-bottom: var(--space-4);
    display: block;
}

/* ==========================================================
   15.5 PAGE HERO (inner pages)
   ========================================================== */
.page-hero {
    position: relative;
    overflow: hidden;
    padding: 170px 0 70px;
    background: var(--bg-primary);
}

.page-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.page-hero-bg .grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(var(--primary-rgb), 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--primary-rgb), 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
}

.page-hero-bg .gradient-orb {
    position: absolute;
    border-radius: var(--radius-round);
    filter: blur(70px);
    opacity: 0.3;
}

.page-hero-bg .orb-1 {
    width: 360px;
    height: 360px;
    background: var(--primary);
    top: -80px;
    right: 5%;
    animation: floatSlow 9s ease-in-out infinite;
}

.page-hero-bg .orb-2 {
    width: 260px;
    height: 260px;
    background: var(--secondary);
    bottom: -80px;
    left: 8%;
    animation: float 7s ease-in-out infinite;
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.breadcrumb-custom {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-5);
}

.breadcrumb-custom a {
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    transition: color var(--transition-fast);
}

.breadcrumb-custom a:hover {
    color: var(--primary-light);
}

.breadcrumb-sep {
    color: var(--text-muted);
    opacity: 0.6;
}

.breadcrumb-current {
    color: var(--primary-light);
}

.page-hero-title {
    font-size: var(--fs-hero);
    font-weight: var(--fw-black);
    margin-bottom: var(--space-4);
}

.page-hero-sub {
    font-size: var(--fs-md);
    max-width: 560px;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.page-hero-line {
    width: 80px;
    height: 4px;
    border-radius: var(--radius-pill);
    background: var(--gradient-primary);
    box-shadow: var(--shadow-glow);
}

/* ==========================================================
   15.6 NAV CTA BUTTON
   ========================================================== */
.nav-cta {
    gap: var(--space-2);
}

.nav-cta i {
    transition: transform var(--transition-base);
}

.nav-cta:hover i {
    transform: translateX(3px) translateY(1px);
}

/* ==========================================================
   15.7 EXPLORE CARDS (home preview links)
   ========================================================== */
.explore-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    position: relative;
}

.explore-card:hover {
    text-decoration: none;
}

.explore-card .explore-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--primary-light);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-sm);
    transition: gap var(--transition-fast), color var(--transition-fast);
}

.explore-card:hover .explore-link {
    gap: var(--space-3);
    color: var(--secondary);
}

.explore-card .explore-link i {
    transition: transform var(--transition-fast);
}

.explore-card:hover .explore-link i {
    transform: translateX(3px);
}

/* ==========================================================
   15.8 CTA BAND
   ========================================================== */
.cta-band {
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    position: relative;
}

.cta-band .btn {
    white-space: normal;
}

/* ==========================================================
   16. MENU / MISC COMPONENTS
   ========================================================== */
/* Code window (used in hero/future sections) */
.code-window {
    background: var(--bg-secondary);
    border: var(--border-width) solid var(--surface-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border-bottom: var(--border-width) solid var(--surface-border);
}

.code-window-dots {
    display: flex;
    gap: 6px;
}

.code-window-dots span {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-round);
}

.code-window-dots .dot-red { background: #ff5f57; }
.code-window-dots .dot-yellow { background: #febc2e; }
.code-window-dots .dot-green { background: #28c840; }

.code-window-title {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-muted);
}

.code-window-body {
    padding: var(--space-5);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    line-height: 1.9;
    color: var(--text-secondary);
}

.code-window-body .code-key { color: var(--primary-light); }
.code-window-body .code-string { color: var(--secondary-light); }
.code-window-body .code-var { color: var(--accent-light); }

/* Dividers */
.divider-gradient {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    border: none;
    margin: var(--space-6) 0;
}

.divider-glow {
    height: 2px;
    border: none;
    border-radius: var(--radius-pill);
    background: var(--gradient-primary);
    box-shadow: var(--shadow-glow);
    width: 80px;
    margin: var(--space-6) auto;
}

/* ==========================================================
   17. RESPONSIVE
   ========================================================== */
@media (max-width: 1199.98px) {
    .hero-image-frame {
        width: 320px;
        height: 320px;
    }
}

@media (max-width: 991.98px) {
    /* Side drawer (slides in from the right) */
    .nav-drawer {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(320px, 86vw);
        height: 100dvh;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: var(--space-6);
        margin: 0;
        background: rgba(10, 10, 26, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: var(--border-width) solid var(--surface-border);
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
        transform: translateX(105%);
        transition: transform 0.35s var(--ease-out);
        z-index: 1045;
        visibility: hidden;
    }

    .nav-drawer.is-open {
        transform: translateX(0);
        visibility: visible;
    }

    .nav-drawer-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: var(--space-5);
    }

    .nav-drawer-title {
        font-family: var(--font-mono);
        font-weight: var(--fw-bold);
        color: var(--text-primary);
    }

    .nav-drawer-close {
        width: 38px;
        height: 38px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-round);
        border: var(--border-width) solid var(--surface-border-strong);
        background: transparent;
        color: var(--text-secondary);
        font-size: var(--fs-md);
        transition: all var(--transition-base);
    }

    .nav-drawer-close:hover {
        color: var(--primary-light);
        border-color: var(--primary);
    }

    .nav-drawer .navbar-nav {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        margin: 0 0 var(--space-5);
    }

    .navbar-nav .nav-link {
        padding: 12px 4px !important;
    }

    .nav-drawer .nav-search-toggle {
        align-self: center;
        margin: var(--space-2) 0;
    }

    .nav-drawer .nav-cta {
        width: 100%;
        justify-content: center;
    }

    /* Mobile menu staggered link entrance */
    .nav-drawer .nav-item {
        opacity: 0;
        transform: translateX(24px);
        transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out);
    }

    .nav-drawer .nav-item:nth-child(1) { transition-delay: 0.05s; }
    .nav-drawer .nav-item:nth-child(2) { transition-delay: 0.09s; }
    .nav-drawer .nav-item:nth-child(3) { transition-delay: 0.13s; }
    .nav-drawer .nav-item:nth-child(4) { transition-delay: 0.17s; }
    .nav-drawer .nav-item:nth-child(5) { transition-delay: 0.21s; }
    .nav-drawer .nav-item:nth-child(6) { transition-delay: 0.25s; }
    .nav-drawer .nav-item:nth-child(7) { transition-delay: 0.29s; }

    .nav-drawer.is-open .nav-item {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-drawer .nav-cta {
        opacity: 0;
        transform: translateY(12px);
        transition: opacity 0.35s var(--ease-out) 0.31s, transform 0.35s var(--ease-out) 0.31s;
    }

    .nav-drawer.is-open .nav-cta {
        opacity: 1;
        transform: translateY(0);
    }

    .hero-image-wrapper {
        margin-top: var(--space-8);
    }

    .hero-image-frame {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 767.98px) {
    :root {
        --section-padding: 4.5rem 0;
        --fs-hero: clamp(2.25rem, 9vw, 3rem);
    }

    .hero-name {
        font-size: var(--fs-hero);
    }

    .hero-image-frame {
        width: 230px;
        height: 230px;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 575.98px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-social {
        justify-content: center;
    }

    .hero-greeting {
        text-align: center;
    }

    .hero-description {
        text-align: center;
    }
}

/* ==========================================================
   18. REDUCED MOTION
   ========================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}