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

:root {
 --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ── Dark Theme (Default for crypto) ──────────── */
[data-theme="dark"] {
 --bg-primary: #0d0f1a;
 --bg-card: #161a2b;
 --bg-tag: #1e2340;
 --bg-hover: #1c2038;
 --text-primary: #e8eaf0;
 --text-secondary: #a0a8c0;
 --text-muted: #5a6080;
 --border: #252a45;
 --accent: #00d4aa;
 --accent-hover: #00b894;
 --accent-red: #ff4757;
 --accent-orange: #ffa502;
 --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
 --shadow-hover: 0 4px 16px rgba(0, 212, 170, 0.15);
 --tab-bg: #0d0f1a;
 --signal-bullish: #00d4aa;
 --signal-bearish: #ff4757;
 --signal-neutral: #a0a8c0;
}

/* ── Light Theme ──────────────────────────────── */
[data-theme="light"] {
 --bg-primary: #f8f9fc;
 --bg-card: #ffffff;
 --bg-tag: #f0f2f8;
 --bg-hover: #f4f5fa;
 --text-primary: #1a1a2e;
 --text-secondary: #5a5e80;
 --text-muted: #8890a8;
 --border: #e2e5f0;
 --accent: #00a884;
 --accent-hover: #008f70;
 --accent-red: #e03e4e;
 --accent-orange: #e89500;
 --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
 --shadow-hover: 0 4px 12px rgba(0, 168, 132, 0.12);
 --tab-bg: #f8f9fc;
 --signal-bullish: #00a884;
 --signal-bearish: #e03e4e;
 --signal-neutral: #8890a8;
}

/* ── Base ──────────────────────────────────────── */
html,
body {
 height: 100%;
 font-size: 16px;
 scroll-behavior: smooth;
 overflow-x: hidden;
}

body {
 font-family: var(--font-sans);
 background: var(--bg-primary);
 color: var(--text-primary);
 line-height: 1.6;
 transition: background 0.3s, color 0.3s;
}

.app {
 display: flex;
 flex-direction: column;
 height: 100vh;
 overflow: hidden;
}

/* ── Sticky Top (Header + Tabs) ───────────────── */
.sticky-top {
 flex-shrink: 0;
 background: var(--bg-primary);
 z-index: 20;
 border-bottom: 1px solid var(--border);
 transition: background 0.3s;
}

/* ── Header ───────────────────────────────────── */
.header {
 border-bottom: 1px solid var(--border);
}

.header-inner {
 max-width: 720px;
 margin: 0 auto;
 padding: 16px 16px;
 display: flex;
 align-items: center;
 justify-content: space-between;
}

.logo {
 font-size: 1.25rem;
 font-weight: 700;
 color: var(--accent);
}

.theme-toggle {
 background: var(--bg-tag);
 border: 1px solid var(--border);
 border-radius: 20px;
 padding: 6px 12px;
 cursor: pointer;
 font-size: 1rem;
 transition: all 0.2s;
}

.theme-toggle:hover {
 border-color: var(--accent);
}

[data-theme="light"] .icon-dark {
 display: none;
}

[data-theme="dark"] .icon-light {
 display: none;
}

/* ── Hero ─────────────────────────────────────── */
.hero {
 border-bottom: 1px solid var(--border);
 background: var(--bg-primary);
}

.hero-inner {
 max-width: 720px;
 margin: 0 auto;
 padding: 20px 16px;
 text-align: center;
}

.hero-tagline {
 font-size: 1.15rem;
 font-weight: 700;
 color: var(--text-primary);
 letter-spacing: 0.5px;
}

.hero-sub {
 font-size: 0.85rem;
 color: var(--text-secondary);
 margin-top: 6px;
}

.hero-stats {
 display: flex;
 align-items: center;
 justify-content: center;
 flex-wrap: wrap;
 gap: 6px;
 margin-top: 12px;
 font-size: 0.78rem;
 color: var(--text-muted);
}

.stat-divider {
 color: var(--border);
}

@media (max-width: 480px) {
 .hero-inner {
  padding: 16px 12px;
 }

 .hero-tagline {
  font-size: 1.05rem;
 }

 .hero-stats {
  gap: 4px;
  font-size: 0.72rem;
 }
}

/* ── Tabs ─────────────────────────────────────── */
.tabs {
 background: var(--tab-bg);
}

.tabs-inner {
 max-width: 720px;
 margin: 0 auto;
 display: flex;
 padding: 0 16px;
}

.tab {
 flex: 1;
 background: none;
 border: none;
 border-bottom: 2px solid transparent;
 color: var(--text-muted);
 font-size: 0.9rem;
 font-weight: 500;
 cursor: pointer;
 padding: 12px 0;
 transition: all 0.2s;
 text-align: center;
}

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

.tab.active {
 color: var(--accent);
 border-bottom-color: var(--accent);
 font-weight: 600;
}

/* ── Scrollable Content ───────────────────────── */
.content {
 flex: 1;
 overflow-y: auto;
 -webkit-overflow-scrolling: touch;
}

.container {
 max-width: 720px;
 width: 100%;
 margin: 0 auto;
 padding: 20px 16px 0;
 overflow: hidden;
}

/* ── Tab Panels ───────────────────────────────── */
.tab-panel {
 display: none;
}

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

/* ── News Card ────────────────────────────────── */
.news-card {
 background: var(--bg-card);
 border: 1px solid var(--border);
 border-radius: 12px;
 padding: 16px;
 margin-bottom: 12px;
 cursor: pointer;
 transition: all 0.2s;
 box-shadow: var(--shadow);
 overflow: hidden;
 min-width: 0;
}

.news-card:hover {
 box-shadow: var(--shadow-hover);
 border-color: var(--accent);
}

.news-card .card-header {
 display: flex;
 align-items: flex-start;
 justify-content: space-between;
 gap: 8px;
}

.news-card .card-header-left {
 display: flex;
 align-items: center;
 gap: 8px;
 flex: 1;
 min-width: 0;
}

.news-card .card-title {
 font-size: 1rem;
 font-weight: 600;
 color: var(--text-primary);
 line-height: 1.4;
 word-break: break-word;
 overflow-wrap: break-word;
 min-width: 0;
}

.news-card .card-summary {
 font-size: 0.9rem;
 color: var(--text-secondary);
 margin-top: 8px;
 display: -webkit-box;
 -webkit-line-clamp: 3;
 line-clamp: 3;
 -webkit-box-orient: vertical;
 overflow: hidden;
}

.news-card .card-tags {
 display: flex;
 flex-wrap: wrap;
 gap: 6px;
 margin-top: 10px;
 align-items: center;
}

.card-reason,
.modal-reason {
 font-size: 0.82rem;
 color: var(--accent);
 margin-top: 8px;
 line-height: 1.5;
}

.card-sources,
.modal-sources {
 font-size: 0.8rem;
 color: var(--text-muted);
 margin-top: 8px;
 word-break: break-all;
 overflow-wrap: break-word;
}

.card-sources a,
.modal-sources a {
 color: var(--accent);
 text-decoration: none;
}

.card-sources a:hover,
.modal-sources a:hover {
 text-decoration: underline;
}

/* ── Tags ─────────────────────────────────────── */
.tag {
 background: var(--bg-tag);
 color: var(--text-secondary);
 font-size: 0.72rem;
 padding: 2px 8px;
 border-radius: 10px;
 white-space: nowrap;
}

.tag.signal-bullish {
 background: rgba(0, 212, 170, 0.15);
 color: var(--signal-bullish);
 font-weight: 600;
}

.tag.signal-bearish {
 background: rgba(255, 71, 87, 0.15);
 color: var(--signal-bearish);
 font-weight: 600;
}

.tag.signal-neutral {
 background: var(--bg-tag);
 color: var(--signal-neutral);
}

.tag.level-critical {
 background: rgba(255, 71, 87, 0.12);
 color: var(--accent-red);
 font-weight: 600;
}

.tag.level-major {
 background: rgba(255, 165, 2, 0.12);
 color: var(--accent-orange);
}

.tag.urgency-immediate {
 background: rgba(255, 71, 87, 0.1);
 color: var(--accent-red);
 font-size: 0.68rem;
}

.tag.coin-tag {
 background: rgba(0, 212, 170, 0.1);
 color: var(--accent);
 font-weight: 500;
}

/* ── Sentiment Bar ────────────────── */
.sentiment-bar {
 display: flex;
 align-items: center;
 gap: 12px;
 padding: 12px 16px;
 background: var(--bg-card);
 border: 1px solid var(--border);
 border-radius: 12px;
 margin-bottom: 16px;
 font-size: 0.85rem;
 box-shadow: var(--shadow);
}

.sb-label {
 color: var(--text-secondary);
 font-weight: 500;
 white-space: nowrap;
}

.sb-bullish {
 color: var(--signal-bullish);
 font-weight: 600;
 white-space: nowrap;
}

.sb-bearish {
 color: var(--signal-bearish);
 font-weight: 600;
 white-space: nowrap;
}

.sb-neutral {
 color: var(--signal-neutral);
 white-space: nowrap;
}

.sb-gauge {
 flex: 1;
 height: 8px;
 background: var(--border);
 border-radius: 4px;
 overflow: hidden;
 display: flex;
 min-width: 60px;
}

.sb-bull-part {
 background: var(--signal-bullish);
 transition: width 0.3s;
}

.sb-bear-part {
 background: var(--signal-bearish);
 transition: width 0.3s;
}

@media (max-width: 480px) {
 .sentiment-bar {
  gap: 8px;
  font-size: 0.78rem;
  padding: 10px 12px;
 }
}

/* ── Impact Stars ──────────────────── */
.impact-stars {
 font-size: 0.75rem;
 color: var(--accent-orange);
 white-space: nowrap;
 flex-shrink: 0;
 letter-spacing: 1px;
}

/* ── Category Tag ──────────────────── */
.tag.category-tag {
 background: var(--bg-tag);
 color: var(--text-secondary);
 border: 1px solid var(--border);
 font-size: 0.72rem;
 padding: 2px 8px;
 border-radius: 4px;
}

/* ── Archive Tree ─────────────────────────────── */
.archive-tree {
 padding-bottom: 16px;
}

.tree-node {
 margin-bottom: 2px;
}

.tree-toggle {
 display: flex;
 align-items: center;
 gap: 8px;
 width: 100%;
 background: none;
 border: none;
 padding: 10px 14px;
 border-radius: 8px;
 cursor: pointer;
 font-size: 0.92rem;
 font-weight: 500;
 color: var(--text-primary);
 transition: background 0.15s;
 text-align: left;
 font-family: var(--font-sans);
}

.tree-toggle:hover {
 background: var(--bg-hover);
}

.tree-toggle .arrow {
 display: inline-block;
 font-size: 0.65rem;
 transition: transform 0.2s;
 color: var(--text-muted);
 width: 10px;
 flex-shrink: 0;
}

.tree-node.open>.tree-toggle .arrow {
 transform: rotate(90deg);
}

.tree-toggle .node-label {
 flex: 1;
}

.tree-toggle .node-count {
 font-size: 0.75rem;
 color: var(--text-muted);
 font-weight: 400;
}

.tree-children {
 display: none;
 padding-left: 20px;
}

.tree-node.open>.tree-children {
 display: block;
}

/* Day-level news items */
.tree-news-list {
 display: none;
 padding-left: 20px;
}

.tree-node.open>.tree-news-list {
 display: block;
}

.tree-news-item {
 display: flex;
 align-items: center;
 justify-content: space-between;
 padding: 9px 14px;
 border-radius: 8px;
 cursor: pointer;
 transition: background 0.15s;
 font-size: 0.88rem;
 gap: 12px;
}

.tree-news-item:hover {
 background: var(--bg-hover);
}

.tree-news-item .item-title {
 color: var(--text-primary);
 font-weight: 400;
 line-height: 1.4;
}

.tree-news-item .item-signal {
 font-size: 0.72rem;
 flex-shrink: 0;
 white-space: nowrap;
}

/* ── Search ────────────────────────────────────── */
.search-box {
 position: sticky;
 top: 0;
 z-index: 5;
 padding: 12px 0;
 background: var(--bg-primary);
}

.search-box input {
 width: 100%;
 padding: 12px 16px;
 border: 1px solid var(--border);
 border-radius: 10px;
 background: var(--bg-card);
 color: var(--text-primary);
 font-size: 0.95rem;
 font-family: var(--font-sans);
 outline: none;
 transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input::placeholder {
 color: var(--text-muted);
}

.search-box input:focus {
 border-color: var(--accent);
 box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

[data-theme="light"] .search-box input:focus {
 box-shadow: 0 0 0 3px rgba(0, 168, 132, 0.12);
}

.search-meta {
 font-size: 0.82rem;
 color: var(--text-muted);
 padding: 0 0 8px;
}

/* ── Empty State ──────────────────────────────── */
.empty-state {
 text-align: center;
 padding: 40px 20px;
 color: var(--text-muted);
 font-size: 0.9rem;
}

/* ── Modal ─────────────────────────────────────── */
.modal-overlay {
 display: none;
 position: fixed;
 inset: 0;
 background: rgba(0, 0, 0, 0.6);
 z-index: 100;
 align-items: center;
 justify-content: center;
 padding: 16px;
}

.modal-overlay.active {
 display: flex;
}

.modal {
 background: var(--bg-card);
 border: 1px solid var(--border);
 border-radius: 16px;
 max-width: 640px;
 width: 100%;
 max-height: 80vh;
 overflow-y: auto;
 padding: 24px;
 position: relative;
 box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.modal-close {
 position: absolute;
 top: 12px;
 right: 16px;
 background: none;
 border: none;
 font-size: 1.2rem;
 color: var(--text-muted);
 cursor: pointer;
 padding: 4px;
}

.modal-close:hover {
 color: var(--text-primary);
}

.modal-content h2 {
 font-size: 1.2rem;
 margin-bottom: 12px;
 color: var(--text-primary);
}

.modal-content .meta {
 font-size: 0.85rem;
 color: var(--text-muted);
 margin-bottom: 16px;
}

.modal-content .meta .signal-label {
 font-weight: 600;
}

.modal-content .meta .signal-label.bullish {
 color: var(--signal-bullish);
}

.modal-content .meta .signal-label.bearish {
 color: var(--signal-bearish);
}

.modal-content .meta .signal-label.neutral {
 color: var(--signal-neutral);
}

.modal-content .body {
 font-size: 0.95rem;
 color: var(--text-secondary);
 line-height: 1.8;
}

.modal-content .coin-list {
 display: flex;
 flex-wrap: wrap;
 gap: 6px;
 margin-top: 12px;
}

/* ── Footer ───────────────────────────────────── */
.footer {
 text-align: center;
 padding: 24px 0;
 color: var(--text-muted);
 font-size: 0.8rem;
 border-top: 1px solid var(--border);
 margin-top: 32px;
}

.footer .footer-slogan {
 font-size: 0.88rem;
 color: var(--accent);
 font-weight: 500;
 margin-bottom: 6px;
}

.footer .update-schedule {
 margin-top: 6px;
 font-size: 0.75rem;
 opacity: 0.8;
}

/* ── Responsive ───────────────────────────────── */
@media (max-width: 480px) {

 .header-inner,
 .container {
  padding-left: 12px;
  padding-right: 12px;
 }

 .tabs-inner {
  padding: 0 12px;
 }

 .logo {
  font-size: 1.1rem;
 }

 .news-card {
  padding: 14px;
 }

 .tab {
  font-size: 0.84rem;
 }
}

/* ── Toast ───────────────────────────────── */
.toast {
 position: fixed;
 bottom: 24px;
 left: 50%;
 transform: translateX(-50%);
 background: var(--accent);
 color: #0d0f1a;
 padding: 10px 24px;
 border-radius: 8px;
 font-size: 0.88rem;
 font-weight: 600;
 z-index: 200;
 box-shadow: 0 4px 16px rgba(0, 212, 170, 0.3);
 transition: opacity 0.3s;
 pointer-events: none;
}

.toast.hidden {
 display: none;
}