/* === CSS Variables === */
:root {
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-card: #1a1a24;
    --color-border: #2a2a3a;
    --color-border-light: #3a3a4a;
    
    --color-text: #e8e8ed;
    --color-text-muted: #8888a0;
    --color-text-subtle: #5a5a70;
    
    --color-accent: #ff6b35;
    --color-accent-soft: rgba(255, 107, 53, 0.15);
    --color-accent-glow: rgba(255, 107, 53, 0.4);
    
    --color-success: #4ade80;
    --color-info: #60a5fa;
    --color-warning: #fbbf24;
    
    --font-display: 'Space Mono', monospace;
    --font-body: 'Sora', sans-serif;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px var(--color-accent-glow);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* === Grain Overlay === */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* === Header === */
header {
    background: linear-gradient(180deg, var(--color-bg-elevated) 0%, var(--color-bg) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: 3rem 2rem;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(ellipse, var(--color-accent-soft) 0%, transparent 70%);
    pointer-events: none;
}

.header-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo-icon {
    font-size: 3rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.logo-text h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.header-description {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 500px;
}

/* === Main Layout === */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2rem;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
}

/* === Sidebar === */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* === Subscribe Section === */
.subscribe-section {
    background: linear-gradient(135deg, var(--color-bg-elevated) 0%, rgba(255, 107, 53, 0.05) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 107, 53, 0.2);
    padding: 1.5rem;
}

.subscribe-section h2 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.subscribe-icon {
    font-size: 1.2rem;
}

.subscribe-description {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.subscribe-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.subscribe-form input[type="email"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.subscribe-form input[type="email"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.subscribe-form input[type="email"]::placeholder {
    color: var(--color-text-subtle);
}

.subscribe-form button {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.subscribe-form button:hover {
    background: #ff8255;
    transform: translateY(-1px);
}

.subscribe-form button:active {
    transform: translateY(0);
}

.subscribe-form button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.subscribe-message {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    min-height: 1.2em;
}

.subscribe-message.success {
    color: var(--color-success);
}

.subscribe-message.error {
    color: #ef4444;
}

/* === Digest Container === */
.digest-container {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.digest-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.date-badge {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--color-accent);
    background: var(--color-accent-soft);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-accent);
}

/* === Language Tabs === */
.language-tabs {
    display: flex;
    gap: 0.5rem;
}

.tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.tab .flag {
    font-size: 1.1rem;
}

@media (max-width: 600px) {
    .tab .lang-name {
        display: none;
    }
    
    .tab {
        padding: 0.6rem 0.8rem;
    }
}

/* === Content Area === */
.content-area {
    padding: 2rem;
    min-height: 400px;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--color-text-muted);
}

.loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* === Section Styling === */
.section {
    margin-bottom: 3rem;
}

.section:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.section-icon {
    font-size: 1.5rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text);
}

/* === Article Cards === */
.article {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.article:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
}

.article:last-child {
    margin-bottom: 0;
}

.article-headline {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.article-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
}

.label-why {
    background: rgba(96, 165, 250, 0.15);
    color: var(--color-info);
    border: 1px solid rgba(96, 165, 250, 0.3);
}

.label-news {
    background: rgba(251, 191, 36, 0.15);
    color: var(--color-warning);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.label-take {
    background: rgba(74, 222, 128, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.label-gist {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    border: 1px solid rgba(255, 107, 53, 0.3);
}

.article-text {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.article-text:last-child {
    margin-bottom: 0;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.article-source {
    font-size: 0.8rem;
    color: var(--color-text-subtle);
}

.article-link {
    font-size: 0.8rem;
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.article-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* === Try This Section Special === */
.try-this-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(255, 107, 53, 0.05) 100%);
    border-color: rgba(255, 107, 53, 0.2);
}

.try-this-card:hover {
    border-color: rgba(255, 107, 53, 0.4);
}

.how-to-try {
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-top: 1rem;
}

.how-to-try-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.how-to-try-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* === Archive Section === */
.archive-section {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 1.5rem;
    height: fit-content;
}

.archive-section h2 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.archive-icon {
    font-size: 1.2rem;
}

.archive-list {
    list-style: none;
}

.archive-list li {
    margin-bottom: 0.5rem;
}

.archive-list a {
    display: block;
    padding: 0.6rem 0.8rem;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.archive-list a:hover {
    background: var(--color-bg-card);
    color: var(--color-text);
}

.archive-list a.active {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    border: 1px solid rgba(255, 107, 53, 0.3);
}

.archive-loading {
    color: var(--color-text-subtle);
    font-size: 0.85rem;
    padding: 0.5rem;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-text {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* === Footer === */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-subtle);
    font-size: 0.85rem;
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
}

/* === Animations === */
.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-light);
}