/* ===== Shared Bites Styles ===== */

/* ===== Variables ===== */
:root {
    /* Color Palette */
    --color-deep-blue: #10214b;
    --color-gold: #d7bd88;
    --color-dust: #d03c3b;
    --color-off-white: #ebe7e1;
    
    /* Color Variations */
    --color-deep-blue-light: #1a3366;
    --color-gold-dark: #c5aa75;
    --color-deep-blue-80: rgba(16, 33, 75, 0.8);
    --color-gold-20: rgba(215, 189, 136, 0.2);
    
    /* Typography */
    --font-primary: 'Playfair Display', serif;
    --font-secondary: 'Montserrat', sans-serif;
    
    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-normal: 300ms cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-slow: 500ms cubic-bezier(0.19, 1, 0.22, 1);
    
    /* Shadows */
    --shadow-subtle: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-elevated: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--color-off-white);
    color: #333333;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Layout ===== */
.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, var(--color-deep-blue), var(--color-deep-blue-light));
    color: var(--color-off-white);
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, transparent 48%, var(--color-gold-20) 49%, var(--color-gold-20) 51%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, var(--color-gold-20) 49%, var(--color-gold-20) 51%, transparent 52%);
    background-size: 40px 40px;
    opacity: 0.3;
    pointer-events: none;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.back-link {
    display: inline-block;
    color: var(--color-gold);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: color var(--transition-fast);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.back-link:hover {
    color: var(--color-off-white);
}

h1 {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    font-weight: 300;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ===== Controls Panel ===== */
.controls-panel {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-right: 3px solid var(--color-gold);
    box-shadow: var(--shadow-elevated);
    width: 320px;
    flex-shrink: 0;
    backdrop-filter: blur(10px);
    align-self: flex-start;
}

.controls-title {
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-deep-blue);
    margin-bottom: 0.8rem;
}

.control-group {
    margin-bottom: 1.2rem;
    transition: opacity var(--transition-normal);
}

.control-group.first-control {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(16, 33, 75, 0.2);
}

.control-group[style*="display: none"] {
    opacity: 0;
}

.control-group > label:not(.radio-option) {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-deep-blue);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
    background-color: var(--color-gold);
    color: var(--color-deep-blue);
    border: none;
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.btn:hover {
    background-color: var(--color-gold-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
}

.btn-secondary:hover {
    background-color: var(--color-gold);
    color: var(--color-deep-blue);
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.radio-option {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color var(--transition-fast);
}

.radio-option:hover {
    background-color: var(--color-gold-20);
}

.radio-option input[type="radio"] {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-deep-blue);
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.radio-option input[type="radio"]:checked {
    border-color: var(--color-gold);
}

.radio-option input[type="radio"]:checked::after {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-gold);
    border-radius: 50%;
}

.radio-label {
    font-size: 0.85rem;
    color: var(--color-deep-blue);
    font-weight: 500;
    line-height: 1;
    flex-shrink: 0;
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    flex: 1;
    height: 4px;
    background: linear-gradient(to right, var(--color-deep-blue), var(--color-gold));
    outline: none;
    transition: all var(--transition-normal);
    -webkit-appearance: none;
    appearance: none;
    border-radius: 0;
    cursor: pointer;
}

input[type="range"]:hover {
    box-shadow: 0 0 8px var(--color-gold-20);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-gold);
    cursor: pointer;
    border-radius: 0;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-subtle);
    margin-top: -6px;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--color-gold-dark);
    transform: scale(1.2);
    box-shadow: var(--shadow-elevated);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--color-gold);
    cursor: pointer;
    border-radius: 0;
    border: none;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-subtle);
}

input[type="range"]::-moz-range-thumb:hover {
    background: var(--color-gold-dark);
    transform: scale(1.2);
    box-shadow: var(--shadow-elevated);
}

input[type="range"]::-webkit-slider-runnable-track {
    height: 4px;
    background: transparent;
    border-radius: 0;
}

input[type="range"]::-moz-range-track {
    height: 4px;
    background: transparent;
    border-radius: 0;
}

.slider-value {
    min-width: 35px;
    text-align: right;
    font-weight: 700;
    color: var(--color-gold);
    font-size: 0.9rem;
}

/* ===== Info Panel ===== */
.info-panel {
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-deep-blue);
    padding: 1.5rem;
    width: 320px;
    flex-shrink: 0;
    border-left: 3px solid var(--color-gold);
    box-shadow: var(--shadow-elevated);
    backdrop-filter: blur(10px);
    align-self: flex-start;
}

.info-title {
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-deep-blue);
    margin-bottom: 0.8rem;
}

.info-text {
    font-size: 0.85rem;
    line-height: 1.6;
    opacity: 0.9;
}

.stats {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(16, 33, 75, 0.2);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
}

.stat-label {
    opacity: 0.8;
}

.stat-value {
    font-weight: 500;
    color: var(--color-gold);
}

/* ===== Explanation Section ===== */
.explanation {
    background: var(--color-deep-blue);
    color: var(--color-off-white);
    padding: 4rem 2rem;
}

.explanation-content {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--color-gold);
}

.section-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.explanation-card {
    background-color: var(--color-off-white);
    color: var(--color-deep-blue);
    padding: 1.5rem;
    border-left: 3px solid var(--color-gold);
    box-shadow: var(--shadow-subtle);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.explanation-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-elevated);
}

.explanation-card h3 {
    font-family: var(--font-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--color-deep-blue);
}

.explanation-card p {
    font-size: 0.95rem;
    line-height: 1.7;
}

.flowing-explanation {
    margin: 2rem 0;
}

.flowing-explanation p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.2rem;
    opacity: 0.9;
}

.flowing-explanation strong {
    font-weight: 600;
    color: var(--color-gold);
}

.subsection-header {
    font-family: var(--font-primary);
    font-size: 2rem;
    margin: 3rem 0 1.5rem;
    color: var(--color-gold);
}

.info-box {
    margin-top: 3rem;
}

.info-box h4 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-gold);
}

.info-box p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.2rem;
    opacity: 0.9;
}

.info-box ul {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-left: 1.8rem;
    list-style: disc;
    opacity: 0.9;
}

.info-box li {
    margin-bottom: 0.6rem;
}

.info-box strong {
    font-weight: 600;
    color: var(--color-gold);
}

.technical-note {
    margin-top: 2.5rem;
}

.technical-note h4 {
    font-family: var(--font-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.8rem;
    color: var(--color-gold);
    opacity: 0.8;
}

.technical-note p {
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.75;
}

.technical-note p + p {
    margin-top: 1rem;
}

.chart-explanation {
    font-size: 1rem;
    line-height: 1.8;
    margin: 2rem 0;
    opacity: 0.9;
}

.highlight-quote {
    font-size: 1.05rem;
    line-height: 1.8;
    font-style: italic;
    padding-left: 1.5rem;
    border-left: 3px solid var(--color-gold);
    margin-top: 2.5rem;
    opacity: 0.9;
}

/* ===== Loading State ===== */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--color-deep-blue);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--color-gold-20);
    border-top-color: var(--color-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* ===== Selection Mode Indicator ===== */
.selection-mode {
    background: var(--color-gold-20);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    text-align: center;
    margin-top: 0.5rem;
    color: var(--color-deep-blue);
}

/* ===== Legend ===== */
.legend {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-gold-20);
}

.legend-title {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-gold);
    margin-bottom: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
    font-size: 0.75rem;
}

.legend-icon {
    width: 24px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.legend-node {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-deep-blue);
}

.legend-line {
    width: 20px;
    height: 2px;
}

.legend-text {
    opacity: 0.9;
    color: var(--color-deep-blue);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .viz-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .controls-panel,
    .info-panel {
        width: 100%;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .viz-content {
        padding: 1rem;
    }
    
    .explanation-grid {
        grid-template-columns: 1fr;
    }
}