/* Aspect Ratio Calculator - Styles */

:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --accent: #6c63ff;
    --accent-secondary: #ff6b9d;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #4caf50;
    --input-bg: #ffffff;
}

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --text-primary: #eaeaea;
    --text-secondary: #b0b0c0;
    --border: #2a2a4a;
    --shadow: rgba(0, 0, 0, 0.3);
    --input-bg: #1e2a4a;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Calculator Section */
.calculator-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow);
    margin-bottom: 2rem;
}

/* Tabs */
.calc-mode-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.tab-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.tab-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* Panels */
.calc-panel {
    display: none;
}

.calc-panel.active {
    display: block;
}

.calc-panel h2 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Input Groups */
.input-group {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.input-group.single {
    justify-content: center;
}

.input-field {
    flex: 1;
    min-width: 120px;
}

.input-field.full-width {
    max-width: 300px;
}

.input-field label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.input-field input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1.1rem;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.input-field input:focus {
    outline: none;
    border-color: var(--accent);
}

.separator {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    font-weight: bold;
}

/* Radio Group */
.radio-group {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.radio-group input[type="radio"] {
    accent-color: var(--accent);
}

/* Buttons */
.primary-btn {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 1.5rem auto;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.4);
}

/* Result Box */
.result-box {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    margin-top: 1.5rem;
    display: none;
}

.result-main {
    margin-bottom: 1rem;
}

.result-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-details {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

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

.detail-item span:first-child {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.detail-item span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

.copy-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.copy-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Reference Section */
.reference-section {
    margin-bottom: 2rem;
}

.reference-section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.ratios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.ratio-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.ratio-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 15px var(--shadow);
    border-color: var(--accent);
}

.ratio-preview {
    height: 60px;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border-radius: 6px;
    margin: 0 auto 0.75rem;
    opacity: 0.8;
}

.r-16-9 { width: 107px; }
.r-4-3 { width: 80px; }
.r-1-1 { width: 60px; }
.r-21-9 { width: 140px; }
.r-9-16 { width: 34px; }
.r-3-2 { width: 90px; }

.ratio-info strong {
    display: block;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.ratio-info span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Trust Badges */
.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.badge {
    background: var(--bg-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    box-shadow: 0 2px 10px var(--shadow);
}

/* How To Section */
.how-to-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px var(--shadow);
}

.how-to-section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-number {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

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

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

/* FAQ Section */
.faq-section {
    margin-bottom: 2rem;
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow);
}

.faq-item summary {
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 1.5rem 1rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    box-shadow: 0 4px 15px var(--shadow);
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.2s;
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* Responsive */
@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }
    
    .calculator-section {
        padding: 1.5rem 1rem;
    }
    
    .tab-btn {
        font-size: 0.85rem;
        padding: 0.6rem 0.75rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
    
    .input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .separator {
        text-align: center;
    }
    
    .result-details {
        flex-direction: column;
        gap: 0.5rem;
    }
}