/**
 * NADI Design System
 * A calm, finance-inspired visual language
 * Prioritizes readability, trust, and accessibility
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Primary Colors - Deep navy palette */
    --color-bg-primary: #0f1419;
    --color-bg-secondary: #1a2332;
    --color-bg-tertiary: #242d3d;
    --color-bg-card: #1e2738;
    --color-bg-card-hover: #232e40;
    --color-bg-card-gradient: linear-gradient(145deg, #1e2738 0%, #242d3d 100%);

    /* Text Colors */
    --color-text-primary: #e8eaed;
    --color-text-secondary: #9aa0a6;
    --color-text-muted: #6b7280;

    /* Accent Colors */
    --color-accent-primary: #4a9eff;
    --color-accent-secondary: #7c3aed;

    /* Trend Colors - Muted for calm aesthetic */
    --color-trend-up: #34d399;
    --color-trend-down: #f87171;
    --color-trend-stable: #9aa0a6;

    /* Prediction Badge Colors */
    --color-badge-grow: rgba(52, 211, 153, 0.15);
    --color-badge-grow-text: #34d399;
    --color-badge-stable: rgba(154, 160, 166, 0.15);
    --color-badge-stable-text: #9aa0a6;
    --color-badge-cool: rgba(248, 113, 113, 0.15);
    --color-badge-cool-text: #f87171;
    --color-badge-unknown: rgba(107, 114, 128, 0.15);
    --color-badge-unknown-text: #6b7280;

    /* Border & Shadow */
    --color-border: #2d3748;
    --color-border-light: #374151;
    --color-border-accent: rgba(74, 158, 255, 0.3);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.22);
    --shadow-expanded: 0 6px 16px rgba(0, 0, 0, 0.28);

    /* Typography - DM Sans for modern, warm feel */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing - Tighter for better density */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.875rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.75rem;
    --spacing-2xl: 2.5rem;

    /* Border Radius - More rounded for elegance */
    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 0.875rem;
    --radius-xl: 0.875rem;
    --radius-card: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease-out;
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --max-width: 1100px;
    --header-height: 72px;
}

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

button:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Layout
   ============================================ */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
    padding-top: calc(var(--header-height) + var(--spacing-lg));
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.08);
}

.header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--color-accent-primary) 50%, transparent 100%);
    opacity: 0.3;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.header__logo:hover {
    text-decoration: none;
}

.header__logo-img {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    object-fit: contain;
}

.header__branding {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.header__logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 0.05em;
    line-height: 1.2;
}

.header__tagline {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: 1.2;
    display: none;
}

.header__context {
    display: none;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    opacity: 0.7;
}

@media (min-width: 640px) {
    .header__tagline {
        display: block;
    }

    .header__context {
        display: block;
    }
}


/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: auto;
}

.footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer__disclaimer {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.7;
}

.footer__brand {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   Selectors (Country & Category)
   ============================================ */
.selectors-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.selector {
    flex: 1;
    min-width: 200px;
}

.selector__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.selector__dropdown {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239aa0a6' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.selector__dropdown:hover {
    border-color: var(--color-border-light);
}

.selector__dropdown:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.2);
}

/* Category Tabs - Horizontal Scrollable */
.category-tabs {
    display: flex;
    flex-wrap: nowrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-left: calc(-1 * var(--spacing-sm));
    margin-right: calc(-1 * var(--spacing-sm));
    /* Hide scrollbar but keep functionality */
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.category-tab {
    position: relative;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    transition: all var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}

.category-tab:hover:not(.category-tab--disabled) {
    background-color: var(--color-bg-card);
    border-color: var(--color-border-light);
}

.category-tab--active {
    color: var(--color-text-primary);
    background-color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.category-tab--active:hover {
    background-color: var(--color-accent-primary);
}

.category-tab--disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.category-tab__badge {
    position: absolute;
    top: -6px;
    right: -6px;
    padding: 2px 6px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-bg-primary);
    background-color: var(--color-text-muted);
    border-radius: var(--radius-sm);
}

/* ============================================
   Topic Card - Elegant Expandable Design
   ============================================ */
.topic-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.topic-card {
    background: var(--color-bg-card-gradient);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    cursor: pointer;
    transition: all var(--transition-smooth);
    overflow: hidden;
}

.topic-card:hover {
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
}

/* Expanded card accent */
.topic-card--expanded {
    border-color: var(--color-border);
    border-top: 2px solid var(--color-accent-primary);
    box-shadow: var(--shadow-expanded);
}

.topic-card--expanded:hover {
    transform: none;
    box-shadow: var(--shadow-expanded);
}

/* Card header (always visible) */
.topic-card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
}

.topic-card__rank {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-muted);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.topic-card--expanded .topic-card__rank {
    background-color: var(--color-accent-primary);
    color: var(--color-text-primary);
}

.topic-card__content {
    flex: 1;
    min-width: 0;
}

.topic-card__name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.topic-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.topic-card__trend {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.topic-card__chevron {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.topic-card--expanded .topic-card__chevron {
    transform: rotate(180deg);
}

/* Card body (expandable content) */
.topic-card__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-smooth), padding var(--transition-smooth);
}

.topic-card--expanded .topic-card__body {
    max-height: 500px;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.topic-card__summary {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.topic-card__footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.topic-card__cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    background-color: var(--color-accent-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.topic-card__cta:hover {
    background-color: #3a8ef0;
}

/* Compact chart in expanded card */
.topic-card__chart {
    height: 120px;
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* Insight block */
.topic-card__insight {
    margin-bottom: var(--spacing-md);
}

.topic-card__insight-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: var(--spacing-xs);
}

.topic-card__insight-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Prediction section in card */
.topic-card__prediction {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.topic-card__prediction-reason {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
}

/* ============================================
   Trend Indicator
   ============================================ */
.trend-indicator {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    font-size: var(--font-size-lg);
    border-radius: var(--radius-md);
}

.trend-indicator--up {
    color: var(--color-trend-up);
    background-color: rgba(52, 211, 153, 0.1);
}

.trend-indicator--down {
    color: var(--color-trend-down);
    background-color: rgba(248, 113, 113, 0.1);
}

.trend-indicator--stable {
    color: var(--color-trend-stable);
    background-color: rgba(154, 160, 166, 0.1);
}

/* ============================================
   Topic Detail Page
   ============================================ */
.topic-detail {
    max-width: 900px;
    margin: 0 auto;
}

.topic-detail__header {
    margin-bottom: var(--spacing-xl);
}

.topic-detail__back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    transition: color var(--transition-fast);
}

.topic-detail__back:hover {
    color: var(--color-text-primary);
}

.topic-detail__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.topic-detail__meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Chart Section */
.chart-section {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-section__header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.chart-section__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.time-range-selector {
    display: flex;
    gap: var(--spacing-xs);
}

.time-range-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.time-range-btn:hover {
    background-color: var(--color-bg-secondary);
}

.time-range-btn--active {
    color: var(--color-text-primary);
    background-color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.chart-container {
    position: relative;
    height: 300px;
}

@media (min-width: 768px) {
    .chart-container {
        height: 350px;
    }
}

/* Summary Section */
.summary-section {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.summary-section__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.summary-section__text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.info-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
}

.info-card__title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

/* Ranking Context */
.ranking-context__position {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.ranking-context__movement {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.ranking-context__movement--up {
    color: var(--color-trend-up);
    background-color: rgba(52, 211, 153, 0.1);
}

.ranking-context__movement--down {
    color: var(--color-trend-down);
    background-color: rgba(248, 113, 113, 0.1);
}

.ranking-context__movement--stable {
    color: var(--color-trend-stable);
    background-color: rgba(154, 160, 166, 0.1);
}

/* Prediction Badge */
.prediction-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.prediction-badge--grow {
    background-color: var(--color-badge-grow);
    color: var(--color-badge-grow-text);
}

.prediction-badge--stable {
    background-color: var(--color-badge-stable);
    color: var(--color-badge-stable-text);
}

.prediction-badge--cool {
    background-color: var(--color-badge-cool);
    color: var(--color-badge-cool-text);
}

.prediction-badge--unknown {
    background-color: var(--color-badge-unknown);
    color: var(--color-badge-unknown-text);
}

.prediction__tooltip {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
}

.prediction__disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

/* Sources List */
.sources-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.source-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

.source-badge__icon {
    width: 16px;
    height: 16px;
}

/* ============================================
   Modal
   ============================================ */
.modal-container {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-container--visible {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 90%;
    max-width: 400px;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-container--visible .modal {
    transform: scale(1);
}

.modal__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.modal__description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.modal__close {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.modal__close:hover {
    background-color: var(--color-bg-secondary);
}

/* ============================================
   Loading States
   ============================================ */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
}

.loading__spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ============================================
   Empty States
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-state__icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.empty-state__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state__description {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
}

/* ============================================
   Utilities
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Page Title
   ============================================ */
.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.page-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Top Trend Preview (Homepage Hero)
   ============================================ */
.top-trend-preview {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-tertiary) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.top-trend-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
}

.top-trend-preview__header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.top-trend-preview__label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.top-trend-preview__label::before {
    content: '●';
    font-size: 8px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

.top-trend-preview__meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.top-trend-preview__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

@media (min-width: 768px) {
    .top-trend-preview__title {
        font-size: var(--font-size-3xl);
    }
}

.top-trend-preview__summary {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.top-trend-preview__footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.top-trend-preview__prediction {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
    min-width: 200px;
}

.top-trend-preview__tooltip {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
}

.top-trend-preview__cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    background-color: var(--color-accent-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.top-trend-preview__cta:hover {
    background-color: #3a8ef0;
    transform: translateX(4px);
}

/* ============================================
   Why This Matters Section
   ============================================ */
.why-matters-section {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.why-matters-section__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.why-matters-section__text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Topic List Section Title
   ============================================ */
.topic-list-section__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.topic-list-section__title::before {
    content: '';
    width: 4px;
    height: 20px;
    background-color: var(--color-accent-primary);
    border-radius: 2px;
}