/* ════════════════════════════════════════════════════════════════
   CaterMath — The DIY Event Food Forecaster
   Warm, appetizing palette: deep charcoal, amber, burnt orange
   ════════════════════════════════════════════════════════════════ */

:root {
    /* Palette */
    --bg-dark:       #1a1918;
    --bg-surface:    #2a2624;
    --amber:         #f59e0b;
    --amber-light:   #fbbf24;
    --amber-dark:    #d97706;
    --orange:        #ea580c;
    --orange-light:  #f97316;
    --orange-dark:   #c2410c;
    
    /* Text */
    --text-primary:  #fdfbf7;
    --text-secondary:#d1d1d1;
    --text-muted:    #9ca3af;
    
    /* Borders & Glass */
    --border:          rgba(245, 158, 11, 0.15);
    --border-strong:   rgba(234, 88, 12, 0.3);
    --glass-bg:        rgba(42, 38, 36, 0.75);
    --glass-border:    rgba(245, 158, 11, 0.25);
    --glass-blur:      12px;

    /* Shadows */
    --shadow-md:       0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-lg:       0 12px 40px rgba(0, 0, 0, 0.6);
    --shadow-amber:    0 4px 20px rgba(245, 158, 11, 0.15);
    
    /* Typography */
    --font-heading:  'Playfair Display', Georgia, serif;
    --font-body:     'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:     'JetBrains Mono', 'SF Mono', monospace;

    /* Spacing & Radius */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2rem;
    --space-2xl: 3rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background: var(--bg-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* Subtle gradient background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(circle at 15% 15%, rgba(234, 88, 12, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(245, 158, 11, 0.08) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

/* ─── Header ─── */
#site-header {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: var(--space-xl) var(--space-md) var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.logo-icon {
    font-size: 2.2rem;
    filter: drop-shadow(0 2px 4px rgba(245, 158, 11, 0.4));
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo .accent {
    color: var(--amber);
}

.tagline {
    font-family: var(--font-heading);
    font-style: italic;
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-top: var(--space-xs);
}

/* ─── Layout ─── */
#main-content {
    position: relative;
    z-index: 5;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md) var(--space-2xl);
}

.section {
    margin-bottom: var(--space-xl);
}

/* ─── Intro ─── */
.intro-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0 auto var(--space-lg);
    line-height: 1.7;
}

.intro-text em {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ─── Glass Cards ─── */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition);
}

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

/* ─── Titles ─── */
.section-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--amber-light);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

/* ─── Inputs ─── */
.input-grid {
    display: grid;
    gap: var(--space-md);
}

.basics-grid {
    grid-template-columns: 1fr 1fr;
}

.full-width {
    grid-column: 1 / -1;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.rate-hint {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 0.75rem;
}

input[type="number"],
select {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 12px;
    transition: all var(--transition);
    width: 100%;
}

select {
    font-family: var(--font-body);
    cursor: pointer;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--amber);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

/* ─── Protein Toggles ─── */
.protein-toggles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.toggle-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-sm);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-strong);
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    text-align: center;
}

.toggle-card input[type="checkbox"] {
    position: absolute;
    opacity: 0;
}

.toggle-card.active {
    border-color: var(--amber);
    background: rgba(245, 158, 11, 0.1);
    box-shadow: var(--shadow-amber);
}

.toggle-card:not(.active) {
    opacity: 0.6;
}

.toggle-emoji {
    font-size: 1.8rem;
}

.toggle-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.toggle-split {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--amber-dark);
    background: rgba(245, 158, 11, 0.15);
    padding: 2px 8px;
    border-radius: 12px;
}

.error-msg {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: var(--space-md);
    text-align: center;
    font-weight: 600;
}

/* ─── Summary Bar ─── */
.summary-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    background: linear-gradient(135deg, var(--bg-surface) 0%, #1a1918 100%);
    border: 1px solid var(--amber);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
    box-shadow: var(--shadow-amber);
}

.summary-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.summary-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
}

.summary-value {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.summary-value.cost {
    color: var(--amber);
}

.summary-value .unit {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 4px;
}

.summary-divider {
    width: 1px;
    height: 40px;
    background: var(--border-strong);
}

.summary-actions {
    margin-left: auto;
}

.btn-share {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--bg-dark);
    background: var(--amber);
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-share:hover {
    background: var(--amber-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

/* ─── Shopping List ─── */
.results-title {
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-xl);
}

.shopping-grid {
    display: grid;
    gap: var(--space-md);
}

.shopping-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-md);
}

.shopping-card .card-icon {
    font-size: 2.2rem;
    flex-shrink: 0;
}

.shopping-card .card-body {
    flex: 1;
}

.shopping-card .card-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.shopping-card .card-quantity {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--amber);
}

.shopping-card .card-unit {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.shopping-card .card-yield-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ─── Waterfall Chart ─── */
.waterfall-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md) 0;
}

.waterfall-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.waterfall-label {
    width: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: right;
    flex-shrink: 0;
}

.waterfall-bar-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.waterfall-bar {
    height: 100%;
    border-radius: 12px;
    transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.waterfall-bar.raw {
    background: var(--orange-dark);
}

.waterfall-bar.cooked {
    background: var(--amber);
}

.waterfall-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
    width: 60px;
    text-align: left;
}

/* ─── Ad Slots ─── */
.ad-slot {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    background: rgba(255, 255, 255, 0.02);
    margin: var(--space-lg) auto;
}

.ad-mobile {
    width: 320px;
    height: 50px;
    max-width: 100%;
}

.ad-desktop {
    display: none;
    width: 728px;
    height: 90px;
    max-width: 100%;
}

@media (min-width: 768px) {
    .ad-mobile { display: none; }
    .ad-desktop { display: flex; }
    .protein-toggles { grid-template-columns: repeat(4, 1fr); }
    .shopping-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ─── Footer ─── */
#site-footer {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ─── Toast ─── */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-dark);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s var(--ease-out);
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}