/* Boomba - Global Styles
 * Typography inspired by Lazard Asset Management
 * Color scheme: Black & White
 */

/* Fonts: Cormorant Garamond (serif) + Inter (sans-serif) */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@300;400;500;600&family=Inter:wght@300;400;500;600;700&display=swap');

/* ================================
   CSS Custom Properties (Design Tokens)
   ================================ */
:root {
    /* Colors - Black & White Palette */
    --color-black: #000000;
    --color-black-soft: #1a1a1a;
    --color-gray-900: #2d2d2d;
    --color-gray-700: #4a4a4a;
    --color-gray-500: #6b6b6b;
    --color-gray-400: #9a9a9a;
    --color-gray-300: #c4c4c4;
    --color-gray-200: #e5e5e5;
    --color-gray-100: #f5f5f5;
    --color-white: #ffffff;
    
    /* Semantic Colors */
    --color-success: #22c55e;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    
    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes */
    --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 */
    --text-7xl: 4.5rem;      /* 72px */
    --text-8xl: 6rem;        /* 96px */
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

/* ================================
   Base Styles
   ================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
}

/* ================================
   Typography
   ================================ */

/* Serif Headings - Editorial Style */
h1, h2, .heading-serif {
    font-family: var(--font-serif);
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--color-black);
}

h1 {
    font-size: var(--text-6xl);
    margin: 0 0 var(--space-6);
}

h2 {
    font-size: var(--text-4xl);
    font-weight: 400;
    margin: 0 0 var(--space-4);
}

/* Sans-serif Headings */
h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-black-soft);
}

h3 {
    font-size: var(--text-2xl);
    margin: 0 0 var(--space-3);
}

h4 {
    font-size: var(--text-xl);
    margin: 0 0 var(--space-2);
}

p {
    margin: 0 0 var(--space-4);
    font-size: var(--text-base);
    color: var(--color-gray-700);
}

.lead {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
}

a {
    color: var(--color-black);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.7;
}

/* ================================
   Layout Utilities
   ================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow {
    max-width: 800px;
}

.section {
    padding: var(--space-20) 0;
}

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

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn:hover {
    opacity: 1;
}

.btn-primary {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.btn-primary:hover {
    background-color: var(--color-gray-900);
}

.btn-primary:disabled {
    background-color: var(--color-gray-400);
    border-color: var(--color-gray-400);
    cursor: not-allowed;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn-secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-black);
    border-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--color-gray-100);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-base);
}

/* ================================
   Form Elements
   ================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-black-soft);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-black);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-black);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

.form-input::placeholder {
    color: var(--color-gray-400);
}

.form-input:disabled {
    background-color: var(--color-gray-100);
    cursor: not-allowed;
}

.form-hint {
    margin-top: var(--space-1);
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.form-error {
    margin-top: var(--space-1);
    font-size: var(--text-sm);
    color: var(--color-error);
}

/* ================================
   Cards
   ================================ */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.card-body {
    padding: var(--space-6);
}

.card-clickable {
    cursor: pointer;
}

.card-clickable:hover {
    transform: translateY(-2px);
}

/* ================================
   Badges
   ================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

.badge-default {
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

.badge-warning {
    background-color: #fef9c3;
    color: #854d0e;
}

.badge-error {
    background-color: #fee2e2;
    color: #991b1b;
}

/* ================================
   Navigation
   ================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.navbar-logo {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 400;
    color: var(--color-black);
    text-decoration: none;
}

.navbar-logo:hover {
    opacity: 1;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    text-decoration: none;
}

.navbar-link:hover {
    color: var(--color-black);
    opacity: 1;
}

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    padding-top: 72px; /* Account for fixed navbar */
}

.hero-title {
    font-size: var(--text-7xl);
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-gray-500);
    max-width: 600px;
}

/* ================================
   Class Card (Schedule)
   ================================ */
.class-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-6);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    transition: all var(--transition-base);
}

.class-card:hover {
    border-color: var(--color-black);
    box-shadow: var(--shadow-md);
}

.class-card-date {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.class-card-time {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: var(--space-2);
}

.class-card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.class-card-instructor {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.class-card-spots {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
}

.class-card-spots.full {
    color: var(--color-error);
}

.class-card-price {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-100);
}

/* ================================
   Utilities
   ================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden { display: none !important; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Grid for class schedule */
.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

/* ================================
   Loading States
   ================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-black);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    z-index: 1000;
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 768px) {
    h1 {
        font-size: var(--text-4xl);
    }
    
    h2 {
        font-size: var(--text-3xl);
    }
    
    .hero-title {
        font-size: var(--text-5xl);
    }
    
    .navbar-nav {
        gap: var(--space-4);
    }
    
    .container {
        padding: 0 var(--space-4);
    }
}