/* ========================================
   BASE STYLES - GLASS MORPHISM DESIGN
   Modern, Clean, Soft Aesthetics
   ======================================== */

:root {
    /* Modern Color Palette - Soft Blues & Purples */
    --color-bg: #fafbfc;
    --color-bg-secondary: #f4f6f8;
    --color-bg-elevated: #ffffff;

    --color-text: #1a1d29;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;

    /* Accent Colors - Soft & Modern */
    --color-primary: #6366f1;          /* Soft indigo */
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-accent: #06b6d4;           /* Cyan */
    --color-accent-light: #22d3ee;
    --color-success: #10b981;          /* Emerald */
    --color-warning: #f59e0b;

    /* Glass Effect Colors */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: rgba(31, 38, 135, 0.15);

    /* Gradient Backgrounds */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-soft: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --gradient-accent: linear-gradient(135deg, #667eea 0%, #06b6d4 100%);
    --gradient-mesh:
        radial-gradient(at 40% 20%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(6, 182, 212, 0.15) 0px, transparent 50%),
        radial-gradient(at 0% 50%, rgba(139, 92, 246, 0.1) 0px, transparent 50%),
        radial-gradient(at 80% 100%, rgba(236, 72, 153, 0.1) 0px, transparent 50%);

    /* Typography - Modern System Font Stack */
    --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Courier New', monospace;

    /* Spacing Scale */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --space-2xl: 96px;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 800px;
    --container-wide: 1400px;

    /* Shadows - Soft & Layered */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius - Soft & Rounded */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* Blur */
    --blur-sm: 8px;
    --blur-md: 16px;
    --blur-lg: 24px;
}

/* ========================================
   RESET & BASE
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    background-image: var(--gradient-mesh);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--color-text);
}

h1 {
    font-size: clamp(40px, 5vw, 64px);
    margin-bottom: var(--space-md);
    font-weight: 800;
}

h2 {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: var(--space-md);
    font-weight: 700;
}

h3 {
    font-size: clamp(24px, 3vw, 36px);
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

h4 {
    font-size: 20px;
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

p {
    margin-bottom: var(--space-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

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

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

strong {
    font-weight: 600;
    color: var(--color-text);
}

/* ========================================
   LAYOUT
   ======================================== */

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

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-wide {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-2xl) 0;
}

.section-lg {
    padding: 120px 0;
}

/* ========================================
   UTILITIES
   ======================================== */

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

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

.text-tertiary {
    color: var(--color-text-tertiary);
}

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

.text-accent {
    color: var(--color-accent);
}

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

.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;
}

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

/* Glass Effect Utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-glass);
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-32px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(32px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Scroll reveal classes */
.reveal {
    opacity: 0;
}

.reveal.active {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    :root {
        --space-lg: 32px;
        --space-xl: 48px;
        --space-2xl: 64px;
    }

    body {
        font-size: 15px;
    }

    .section {
        padding: var(--space-xl) 0;
    }

    .section-lg {
        padding: 80px 0;
    }
}

@media (max-width: 480px) {
    .container,
    .container-narrow,
    .container-wide {
        padding: 0 var(--space-sm);
    }
}

/* ========================================
   CUSTOM SCROLLBAR
   ======================================== */

::-webkit-scrollbar {
    width: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    border: 3px solid var(--color-bg-secondary);
}

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