/**
 * Premium Central House Theme
 * Modern, premium design system inspired by Shopify/Apple stores
 */

/* ===== PREMIUM DESIGN SYSTEM ===== */

/* CSS Variables - Premium Color Palette */
:root {
    /* Primary Colors - Premium Warm Palette */
    --bg-primary: #E8E6E1;        /* Soft warm grey background */
    --bg-secondary: #F5F4F0;      /* Very light warm grey */
    --bg-white: #FFFFFF;           /* Pure white for cards */
    --bg-accent: #FAF9F6;          /* Subtle warm accent */
    
    /* Wood Accent Colors - Premium */
    --accent-primary: #C47A3A;     /* Warm wood tone */
    --accent-secondary: #D17B38;   /* Lighter wood accent */
    --accent-light: #E8A468;       /* Very light wood */
    --accent-dark: #A65A2E;        /* Dark wood for emphasis */
    --accent-subtle: rgba(196, 122, 58, 0.1); /* Subtle background */
    
    /* Text Colors - High Contrast */
    --text-primary: #1A1A1A;       /* Deep black for headings */
    --text-secondary: #4A4A4A;     /* Medium grey for body text */
    --text-muted: #6B7280;         /* Light grey for helper text */
    --text-white: #FFFFFF;         /* White text for dark backgrounds */
    
    /* Border & UI Colors */
    --border-light: #E5E5E5;       /* Light borders */
    --border-medium: #D1D5DB;      /* Medium borders */
    --border-dark: #9CA3AF;        /* Dark borders */
    
    /* Status Colors */
    --success: #10B981;            /* Green for success */
    --warning: #F59E0B;            /* Amber for warnings */
    --error: #EF4444;              /* Red for errors */
    --info: #3B82F6;               /* Blue for info */
    
    /* Shadows - Premium System */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    
    /* Premium Accent Shadows */
    --shadow-accent: 0 4px 14px rgba(196, 122, 58, 0.15);
    --shadow-accent-hover: 0 8px 25px rgba(196, 122, 58, 0.25);
    
    /* Spacing System - Consistent & Professional */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */
    
    /* Border Radius - Modern & Subtle */
    --radius-xs: 0.125rem;  /* 2px */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-lg: 0.5rem;    /* 8px */
    --radius-xl: 0.75rem;   /* 12px */
    --radius-2xl: 1rem;     /* 16px */
    --radius-3xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* Typography Scale - Premium Hierarchy */
    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-4xl: 2.25rem;    /* 36px */
    --text-5xl: 3rem;       /* 48px */
    --text-6xl: 3.75rem;    /* 60px */
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    
    /* Transitions - Smooth & Professional */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;
    
    /* Z-Index System */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-maximum: 9999;
}

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

/* Font Imports */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* Base Typography */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    font-weight: var(--font-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-primary);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', 'Inter', sans-serif;
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: var(--tracking-tight);
}

h1 {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
}

h2 {
    font-size: var(--text-4xl);
    font-weight: var(--font-semibold);
}

h3 {
    font-size: var(--text-3xl);
    font-weight: var(--font-semibold);
}

h4 {
    font-size: var(--text-2xl);
    font-weight: var(--font-medium);
}

h5 {
    font-size: var(--text-xl);
    font-weight: var(--font-medium);
}

h6 {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
}

/* Text Elements */
p {
    margin-bottom: var(--space-4);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

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

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

/* Text Utilities */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }
.text-6xl { font-size: var(--text-6xl); }

.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.font-extrabold { font-weight: var(--font-extrabold); }

.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }
.leading-loose { line-height: var(--leading-loose); }

.tracking-tight { letter-spacing: var(--tracking-tight); }
.tracking-normal { letter-spacing: var(--tracking-normal); }
.tracking-wide { letter-spacing: var(--tracking-wide); }
.tracking-wider { letter-spacing: var(--tracking-wider); }

/* ===== PREMIUM COMPONENTS ===== */

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Section Layouts */
.section {
    padding: var(--space-20) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-lg {
    padding: var(--space-24) 0;
}

.section-xl {
    padding: var(--space-32) 0;
}

/* Premium Cards */
.card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-elevated {
    box-shadow: var(--shadow-md);
}

.card-elevated:hover {
    box-shadow: var(--shadow-xl);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-family: 'Inter', sans-serif;
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(196, 122, 58, 0.2);
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--text-white);
    box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
    background: var(--accent-secondary);
    box-shadow: var(--shadow-accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
    background: var(--bg-accent);
    border-color: var(--border-dark);
}

.btn-outline {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
    background: var(--accent-primary);
    color: var(--text-white);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

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

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

.btn-xl {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-xl);
    border-radius: var(--radius-2xl);
}

/* Premium Forms */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-family: 'Inter', sans-serif;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    font-family: 'Inter', sans-serif;
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-white);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(196, 122, 58, 0.1);
}

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

/* Premium Navigation */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-family: 'Poppins', sans-serif;
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-medium);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
    background: var(--accent-subtle);
}

/* Premium Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.mt-0 { margin-top: 0; }
.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-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.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-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: var(--space-1); }
.ml-2 { margin-left: var(--space-2); }
.ml-3 { margin-left: var(--space-3); }
.ml-4 { margin-left: var(--space-4); }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: var(--space-1); }
.mr-2 { margin-right: var(--space-2); }
.mr-3 { margin-right: var(--space-3); }
.mr-4 { margin-right: var(--space-4); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Display Utilities */
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Border Radius */
.rounded { border-radius: var(--radius-lg); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.animate-fadeIn { animation: fadeIn 0.5s ease-out; }
.animate-fadeInUp { animation: fadeInUp 0.5s ease-out; }
.animate-slideInLeft { animation: slideInLeft 0.5s ease-out; }
.animate-slideInRight { animation: slideInRight 0.5s ease-out; }

/* ===== PREMIUM MICRO-INTERACTIONS ===== */

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Enhanced Button Hover Effects */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

.btn-outline::before {
    background: linear-gradient(90deg, transparent, rgba(196, 122, 58, 0.1), transparent);
}

/* Card Hover Enhancements */
.card {
    position: relative;
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(196, 122, 58, 0.05) 0%, 
        transparent 50%, 
        rgba(196, 122, 58, 0.05) 100%
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    border-radius: inherit;
}

.card:hover::after {
    opacity: 1;
}

/* Icon Hover Effects */
.social-link:hover {
    transform: translateY(-3px) rotate(5deg);
}

.nav-link:hover i {
    transform: scale(1.1);
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.loading-shimmer {
    background: linear-gradient(90deg, 
        var(--bg-accent) 25%, 
        var(--bg-secondary) 50%, 
        var(--bg-accent) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

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

.pulse-on-hover:hover {
    animation: pulse 0.6s ease-in-out;
}

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

.float-animation {
    animation: float 3s ease-in-out infinite;
}

/* Glow Effect */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(196, 122, 58, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(196, 122, 58, 0.8);
    }
}

.glow-on-hover:hover {
    animation: glow 1.5s ease-in-out;
}

/* Text Gradient Animation */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.animated-gradient {
    background: linear-gradient(270deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Enhanced Focus States */
.btn:focus-visible,
.nav-link:focus-visible,
.social-link:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Smooth Image Loading */
img {
    transition: opacity var(--transition-normal);
}

img[data-src] {
    opacity: 0;
}

img.loaded {
    opacity: 1;
}

/* Parallax Scroll Effect */
.parallax {
    transform: translateZ(0);
    will-change: transform;
}

/* Staggered Animations */
.stagger-animation > * {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out forwards;
}

.stagger-animation > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-animation > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-animation > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-animation > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-animation > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-animation > *:nth-child(6) { animation-delay: 0.6s; }

/* Magnetic Button Effect */
.magnetic-btn {
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Intersection Observer Animations */
.observe-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.observe-animate.observed {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Hover States */
.hover-lift {
    transition: all var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

/* Text Selection */
::selection {
    background: var(--accent-primary);
    color: var(--text-white);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: var(--radius-full);
}

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

/* Enhanced Form Controls */
.form-control:focus {
    transform: translateY(-1px);
    box-shadow: 0 0 0 3px rgba(196, 122, 58, 0.1), var(--shadow-md);
}

/* Link Hover Underline */
.link-underline {
    position: relative;
    text-decoration: none;
}

.link-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-normal);
}

.link-underline:hover::after {
    width: 100%;
}

/* Tooltip Effect */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--text-white);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    margin-bottom: var(--space-2);
}

[data-tooltip]:hover::before {
    opacity: 1;
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.ripple:active::before {
    width: 300px;
    height: 300px;
}

/* Responsive Design */
@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .grid-cols-3,
    .grid-cols-4,
    .grid-cols-5 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }
    h3 { font-size: var(--text-2xl); }
}

@media (max-width: 480px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4,
    .grid-cols-5 {
        grid-template-columns: 1fr;
    }
    
    .btn-lg {
        padding: var(--space-3) var(--space-6);
        font-size: var(--text-base);
    }
    
    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }
    h3 { font-size: var(--text-xl); }
}