/* ==========================================================================
   MAIN DESIGN SYSTEM & BRAND TOKENS - CREATIVE BENCHERS
   Official Color Palette:
   - #F5F7F8 (Off-White / Porcelain Surface)
   - #F4CE14 (Bench Yellow / Primary Accent)
   - #495E57 (Deep Forest Slate / Secondary Accent)
   - #45474B (Dark Charcoal / Structural Neutral)
   ========================================================================== */

:root {
    /* Official Palette Tokens */
    --color-porcelain: #F5F7F8;
    --color-bench-yellow: #F4CE14;
    --color-forest-teal: #495E57;
    --color-charcoal: #45474B;
    
    /* Dark Theme Surface Tokens */
    --bg-dark: #1A1C1E;
    --bg-card: rgba(69, 71, 75, 0.45);
    --bg-card-hover: rgba(73, 94, 87, 0.35);
    --bg-card-solid: #2B2D31;
    --border-color: rgba(245, 247, 248, 0.12);
    --border-glow: rgba(244, 206, 20, 0.35);
    
    /* Brand Accents */
    --accent-yellow: var(--color-bench-yellow);
    --accent-yellow-glow: rgba(244, 206, 20, 0.4);
    --accent-teal: var(--color-forest-teal);
    --accent-teal-glow: rgba(73, 94, 87, 0.5);
    --accent-emerald: #10B981;
    --accent-red: #FF4757;
    
    /* Typography Colors */
    --text-primary: #F5F7F8;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --text-dark: #1A1C1E;
    
    /* Fonts - Strictly Google Sans Family */
    --font-heading: 'Google Sans', 'Google Sans Text', sans-serif;
    --font-subheading: 'Google Sans', 'Google Sans Text', sans-serif;
    --font-body: 'Google Sans Text', 'Google Sans', sans-serif;
    
    /* Radii & Shadows */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 25px rgba(244, 206, 20, 0.2);
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
body.light-theme {
    --bg-dark: var(--color-porcelain);
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(244, 206, 20, 0.1);
    --bg-card-solid: #FFFFFF;
    --border-color: rgba(69, 71, 75, 0.15);
    --border-glow: rgba(73, 94, 87, 0.3);
    --text-primary: var(--color-charcoal);
    --text-secondary: #475569;
    --text-muted: #64748B;
    --shadow-glass: 0 10px 30px 0 rgba(0, 0, 0, 0.08);
}

/* Base Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

/* Canvas & Background Glows */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

.ambient-light {
    position: fixed;
    border-radius: 50%;
    filter: blur(140px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.3;
    animation: floatGlow 18s ease-in-out infinite alternate;
}

.glow-1 {
    top: -10%;
    left: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-bench-yellow) 0%, rgba(0,0,0,0) 70%);
}

.glow-2 {
    bottom: 20%;
    right: 5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-forest-teal) 0%, rgba(0,0,0,0) 70%);
    animation-delay: -6s;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, 40px) scale(1.1); }
    100% { transform: translate(-40px, 80px) scale(0.95); }
}

/* Container */
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

p { color: var(--text-secondary); }

.highlight-yellow { color: var(--color-bench-yellow); }
.highlight-teal { color: var(--color-forest-teal); }
.highlight-emerald { color: var(--accent-emerald); }

.gradient-yellow {
    background: linear-gradient(135deg, var(--color-bench-yellow) 0%, #FFF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Sections */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    margin-bottom: 3.5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    margin-top: 0.75rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.15rem;
    max-width: 680px;
    margin: 0 auto;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: rgba(244, 206, 20, 0.12);
    border: 1px solid rgba(244, 206, 20, 0.3);
    color: var(--color-bench-yellow);
}

.badge-teal {
    background: rgba(73, 94, 87, 0.2);
    border-color: rgba(73, 94, 87, 0.4);
    color: var(--color-porcelain);
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow), var(--shadow-glass);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    font-family: var(--font-subheading);
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-lg {
    padding: 1.1rem 2.25rem;
    font-size: 1.05rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-bench-yellow) 0%, #D9B000 100%);
    color: #1A1C1E;
    box-shadow: 0 4px 20px var(--accent-yellow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(244, 206, 20, 0.6);
}

.btn-teal {
    background: var(--color-forest-teal);
    color: var(--color-porcelain);
    box-shadow: 0 4px 20px var(--accent-teal-glow);
}

.btn-teal:hover {
    background: #3A4B45;
    transform: translateY(-2px);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(244, 206, 20, 0.1);
    border-color: var(--color-bench-yellow);
    color: var(--color-bench-yellow);
    transform: translateY(-2px);
}

.btn-block { width: 100%; }

/* Navigation Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    padding: 0.65rem 0;
    background: rgba(26, 28, 30, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

body.light-theme .site-header.scrolled {
    background: rgba(245, 247, 248, 0.9);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo-img {
    height: 40px;
    width: auto;
    display: block;
    transition: transform var(--transition-fast);
}

.brand-logo-img:hover {
    transform: scale(1.02);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 1.75rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 600;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-bench-yellow);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-bench-yellow);
    transition: width var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
}

@media (max-width: 1024px) {
    .main-nav, .nav-cta { display: none; }
    .mobile-menu-btn { display: flex; }
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(26, 28, 30, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.mobile-nav-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.75rem;
}

.mobile-nav-link {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--text-primary);
    text-decoration: none;
}