/* SentimentStream -- Twitter-inspired blue theme */

:root {
    --primary: #1DA1F2;
    --primary-dark: #1A91DA;
    --primary-light: #71C9F8;
    --positive: #17BF63;
    --negative: #E0245E;
    --neutral: #AAB8C2;
    --bg: #15202B;
    --bg-card: #192734;
    --bg-hover: #22303C;
    --text: #FFFFFF;
    --text-secondary: #8899A6;
    --border: #38444D;
    --shadow: rgba(0, 0, 0, 0.3);
    --radius: 16px;
    --radius-sm: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ── Navbar ─────────────────────────────────────────────────── */

.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-icon { font-size: 1.4rem; }

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover { background: var(--bg-hover); color: var(--text); }
.nav-link.active { color: var(--primary); background: rgba(29, 161, 242, 0.1); }

/* ── Main Content ───────────────────────────────────────────── */

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px;
    min-height: calc(100vh - 120px);
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ── Cards ──────────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ── Stats Row ──────────────────────────────────────────────── */

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-positive .stat-value { color: var(--positive); }
.stat-negative .stat-value { color: var(--negative); }
.stat-neutral .stat-value { color: var(--neutral); }

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── Dashboard Grid ─────────────────────────────────────────── */

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.gauge-container {
    text-align: center;
    padding: 10px 0;
}

.gauge-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 8px;
}

.gauge-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ── Controls ───────────────────────────────────────────────── */

.controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--border); }

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

.btn-outline:hover { background: rgba(29, 161, 242, 0.1); }

.btn-block { width: 100%; }

.stream-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--negative);
    display: inline-block;
}

.status-dot.active { background: var(--positive); animation: pulse 1.5s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.filter-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.filter-row select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-size: 0.9rem;
}

/* ── Tweet Stream ───────────────────────────────────────────── */

.stream-card { max-height: 600px; overflow: hidden; display: flex; flex-direction: column; }
.tweet-stream { overflow-y: auto; flex: 1; }
.tweet-counter { font-size: 0.85rem; color: var(--text-secondary); font-weight: 400; }

.tweet-item {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
    border-left: 3px solid transparent;
}

.tweet-item:hover { background: var(--bg-hover); }
.tweet-item.sentiment-positive { border-left-color: var(--positive); }
.tweet-item.sentiment-negative { border-left-color: var(--negative); }
.tweet-item.sentiment-neutral { border-left-color: var(--neutral); }

.tweet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.tweet-username {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.95rem;
}

.tweet-sentiment {
    font-size: 0.8rem;
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 600;
}

.badge-positive { background: rgba(23, 191, 99, 0.2); color: var(--positive); }
.badge-negative { background: rgba(224, 36, 94, 0.2); color: var(--negative); }
.badge-neutral { background: rgba(170, 184, 194, 0.2); color: var(--neutral); }

.tweet-text {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 8px;
}

.tweet-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.hashtag {
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
}

.tweet-time {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-left: auto;
}

/* ── Topics ─────────────────────────────────────────────────── */

.topics-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.topic-count { color: var(--text-secondary); font-size: 0.9rem; }

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.topic-card { transition: transform 0.15s; }
.topic-card:hover { transform: translateY(-2px); }

.topic-name { font-size: 1.1rem; margin-bottom: 10px; color: var(--primary); }

.topic-stats {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.topic-count-badge {
    background: rgba(29, 161, 242, 0.15);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
}

.topic-sentiment { font-size: 0.85rem; font-weight: 600; }
.sentiment-pos { color: var(--positive); }
.sentiment-neg { color: var(--negative); }
.sentiment-neu { color: var(--neutral); }

.topic-keywords { display: flex; flex-wrap: wrap; gap: 6px; }

.keyword-tag {
    background: var(--bg);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
}

.keyword-tag.small { font-size: 0.75rem; padding: 2px 8px; }

.bubble-container { text-align: center; padding: 10px; }

/* ── Trends ─────────────────────────────────────────────────── */

.chart-container { padding: 10px 0; }

.alerts-list { display: flex; flex-direction: column; gap: 8px; }

.alert-item {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border-left: 4px solid;
    font-size: 0.9rem;
}

.alert-info { background: rgba(29, 161, 242, 0.1); border-left-color: var(--primary); }
.alert-warning { background: rgba(255, 173, 31, 0.1); border-left-color: #FFAD1F; }

.alert-type {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

/* ── Data Table ─────────────────────────────────────────────── */

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.text-positive { color: var(--positive); }
.text-negative { color: var(--negative); }
.text-neutral { color: var(--neutral); }
.empty-cell { color: var(--text-secondary); text-align: center; font-style: italic; }

/* ── Analyze Page ───────────────────────────────────────────── */

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-textarea {
    width: 100%;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.2s;
}

.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.char-count {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.results-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    align-items: start;
}

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

.result-score {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 8px;
}

.result-label {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.detail-row {
    margin-bottom: 12px;
}

.detail-label {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    display: block;
}

.detail-value { font-size: 1.1rem; }

.word-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }

.word-tag-pos {
    background: rgba(23, 191, 99, 0.2);
    color: var(--positive);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.word-tag-neg {
    background: rgba(224, 36, 94, 0.2);
    color: var(--negative);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.examples-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.example-btn {
    background: var(--bg);
    color: var(--primary);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.example-btn:hover { background: var(--bg-hover); }

/* ── About Page ─────────────────────────────────────────────── */

.about-page .card { margin-bottom: 20px; }
.about-page p { margin-bottom: 12px; color: var(--text-secondary); line-height: 1.7; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.feature-list li strong { color: var(--text); }

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.tech-item {
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius-sm);
}

.tech-item strong {
    display: block;
    margin-bottom: 4px;
    color: var(--primary);
}

.tech-item span { color: var(--text-secondary); font-size: 0.9rem; }

/* ── Footer ─────────────────────────────────────────────────── */

.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 20px;
    text-align: center;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-links { margin-top: 8px; }
.footer-links a { color: var(--primary); text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }
.footer-links .sep { margin: 0 8px; color: var(--border); }

/* ── Empty / Loading States ─────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.loading-text {
    color: var(--text-secondary);
    font-style: italic;
}

/* ── Responsive ─────────────────────────────────────────────── */

@media (max-width: 768px) {
    .dashboard-grid { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .topics-grid { grid-template-columns: 1fr; }
    .results-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr; }
    .nav-links { gap: 0; }
    .nav-link { padding: 8px 10px; font-size: 0.85rem; }
}