/* ============================================
   SHARED STYLES - Designer Showcase
   Theme System + Responsive Design
   ============================================ */

/* ============================================
   THEME VARIABLES
   ============================================ */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a0c;
    --bg-secondary: #121214;
    --bg-card: rgba(30, 30, 35, 0.85);
    --bg-card-hover: rgba(40, 40, 48, 0.95);

    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --text-muted: #666680;

    --accent: #ff6600;
    --accent-soft: rgba(255, 102, 0, 0.15);
    --accent-blue: #4d94ff;
    --accent-purple: #9d4edd;

    --border-primary: rgba(255, 255, 255, 0.12);
    --border-secondary: rgba(255, 255, 255, 0.06);

    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);

    --grid-line: rgba(255, 255, 255, 0.03);
    --overlay-gradient: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.4) 100%);

    /* Typography */
    --font-serif: 'EB Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #f0f0f2;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-card-hover: rgba(255, 255, 255, 1);

    --text-primary: #1a1a1e;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;

    --accent: #e55800;
    --accent-soft: rgba(229, 88, 0, 0.12);
    --accent-blue: #2563eb;
    --accent-purple: #7c3aed;

    --border-primary: rgba(0, 0, 0, 0.12);
    --border-secondary: rgba(0, 0, 0, 0.06);

    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);

    --grid-line: rgba(0, 0, 0, 0.04);
    --overlay-gradient: radial-gradient(circle at center, transparent 0%, rgba(255, 255, 255, 0.3) 100%);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.mono {
    font-family: var(--font-mono);
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-normal);
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-brand:hover {
    color: var(--accent-blue);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.theme-toggle::before {
    content: '☀';
    font-size: 0.9rem;
}

[data-theme="light"] .theme-toggle::before {
    content: '☾';
}

/* ============================================
   BACK BUTTON
   ============================================ */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
}

.back-btn:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.back-btn::before {
    content: '←';
}

/* ============================================
   GRID BACKGROUND
   ============================================ */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

.bg-vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-gradient);
    z-index: -1;
    pointer-events: none;
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.container-narrow {
    max-width: 900px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-slow);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card-label {
    display: inline-block;
    padding: 2px 10px;
    background: var(--accent);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    margin-bottom: var(--space-md);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

/* ============================================
   DESIGNER GRID (Index Page)
   ============================================ */
.designer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.designer-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: all var(--transition-slow);
}

.designer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--accent);
    transition: height var(--transition-slow);
}

.designer-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-6px);
}

.designer-card:hover::before {
    height: 100%;
}

.designer-name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.designer-role {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.designer-quote {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.5;
    flex-grow: 1;
}

.designer-arrow {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    font-size: 1.2rem;
    color: var(--accent);
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-fast);
}

.designer-card:hover .designer-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    padding: calc(80px + var(--space-xl)) 0 var(--space-xl);
    text-align: center;
}

.page-title {
    font-size: clamp(2rem, 8vw, 4rem);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.page-subtitle {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.page-description {
    max-width: 600px;
    margin: var(--space-lg) auto 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1200px) {
    .designer-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
    }

    .nav-bar {
        padding: var(--space-sm) var(--space-md);
    }

    .nav-brand {
        font-size: 0.65rem;
    }

    .theme-toggle,
    .back-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.6rem;
    }

    .designer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .designer-card {
        padding: var(--space-md);
    }

    .page-header {
        padding: calc(60px + var(--space-lg)) var(--space-md) var(--space-lg);
    }

    .container {
        padding: var(--space-md);
    }

    .bg-grid {
        background-size: 30px 30px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 0.7rem;
    }

    .designer-name {
        font-size: 1.25rem;
    }

    .designer-quote {
        font-size: 0.85rem;
    }

    .nav-actions {
        gap: var(--space-sm);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .hidden-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .hidden-desktop {
        display: none !important;
    }
}