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

:root {
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #a0aec0;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-dark: #4f46e5;
    --accent-bg: rgba(99, 102, 241, 0.08);
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.08);
    --danger: #ef4444;
    --white: #ffffff;
    --bg-page: #f0f4ff;
    --bg-card: rgba(255, 255, 255, 0.35);
    --bg-card-hover: rgba(255, 255, 255, 0.5);
    --border-glass: rgba(255, 255, 255, 0.5);
    --border-subtle: rgba(99, 102, 241, 0.12);
    --shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.06);
    --shadow-md: 0 4px 24px rgba(99, 102, 241, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.6);
    --shadow-lg: 0 12px 40px rgba(99, 102, 241, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.7);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --max-width: 1200px;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-dark);
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

@media (max-width: 640px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.15rem; }
}

/* Utility */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s var(--transition) both;
}

.animate-fade-in {
    animation: fadeIn 0.5s ease both;
}

.animate-scale-in {
    animation: scaleIn 0.5s var(--transition) both;
}

/* Staggered children animation */
.stagger-children > * {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
}
.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(9) { animation-delay: 0.45s; }
.stagger-children > *:nth-child(10) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(11) { animation-delay: 0.55s; }
.stagger-children > *:nth-child(12) { animation-delay: 0.6s; }
.stagger-children > *:nth-child(13) { animation-delay: 0.65s; }
.stagger-children > *:nth-child(14) { animation-delay: 0.7s; }
.stagger-children > *:nth-child(15) { animation-delay: 0.75s; }
.stagger-children > *:nth-child(16) { animation-delay: 0.8s; }