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

/* ========================================
   Theme variables — Dark (default)
   ======================================== */
:root {
  --bg-page: #1a1a1a;
  --bg-header: #111;
  --bg-viewer: #252525;
  --bg-sidebar: #1a1a1a;
  --bg-sidebar-hover: rgba(255, 255, 255, 0.02);
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.05);
  --bg-badge: rgba(255, 255, 255, 0.06);
  --bg-tab: #111;
  --border: #2a2a2a;
  --border-light: #333;
  --text-primary: #e0e0e0;
  --text-secondary: #888;
  --text-tertiary: #555;
  --text-muted: #444;
  --text-heading: #666;
  --text-nav: #888;
  --text-nav-hover: #fff;
  --text-link-hover: #fff;
  --text-date: #777;
  --text-date-hover: #ccc;
  --text-tab: #555;
  --text-tab-active: #e0e0e0;
  --tab-active-border: #e0e0e0;
  --accent-blue: #4a9eff;
  --color-up: #4ade80;
  --color-up-bg: rgba(74, 222, 128, 0.1);
  --color-down: #f87171;
  --color-down-bg: rgba(248, 113, 113, 0.1);
  --pdf-filter: invert(1) hue-rotate(180deg);
  --overlay-bg: #252525;
  --spinner-track: #333;
  --spinner-head: #888;
  --btn-bg: #333;
  --btn-border: #444;
  --btn-text: #ccc;
  --btn-bg-hover: #444;
  --scrollbar-thumb: #333;
  --scrollbar-hover: #444;
}

/* ========================================
   Theme variables — Light
   ======================================== */
body.light {
  --bg-page: #f0efe8;
  --bg-header: #1a1a1a;
  --bg-viewer: #d5d5d0;
  --bg-sidebar: #f0efe8;
  --bg-sidebar-hover: rgba(0, 0, 0, 0.03);
  --bg-card: rgba(0, 0, 0, 0.04);
  --bg-card-hover: rgba(0, 0, 0, 0.07);
  --bg-badge: rgba(0, 0, 0, 0.06);
  --bg-tab: #e8e7e0;
  --border: #d0cfca;
  --border-light: #c0bfb8;
  --text-primary: #222;
  --text-secondary: #555;
  --text-tertiary: #888;
  --text-muted: #aaa;
  --text-heading: #888;
  --text-nav: #ccc;
  --text-nav-hover: #fff;
  --text-link-hover: #000;
  --text-date: #aaa;
  --text-date-hover: #fff;
  --text-tab: #888;
  --text-tab-active: #333;
  --tab-active-border: #333;
  --accent-blue: #2563eb;
  --color-up: #16a34a;
  --color-up-bg: rgba(22, 163, 74, 0.1);
  --color-down: #dc2626;
  --color-down-bg: rgba(220, 38, 38, 0.1);
  --pdf-filter: none;
  --overlay-bg: #d5d5d0;
  --spinner-track: #ccc;
  --spinner-head: #666;
  --btn-bg: #ddd;
  --btn-border: #ccc;
  --btn-text: #333;
  --btn-bg-hover: #ccc;
  --scrollbar-thumb: #ccc;
  --scrollbar-hover: #bbb;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-page);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  transition: background 0.2s;
}

/* ========================================
   Header
   ======================================== */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 8px;
  background: var(--bg-header);
  color: #f5f5f0;
  z-index: 10;
  position: relative;
  border-bottom: 1px solid #2a2a2a;
}

.header-left,
.header-right {
  flex: 0 0 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid #444;
  color: #aaa;
  font-size: 12px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  line-height: 1;
}

.theme-toggle:hover {
  border-color: #888;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.date-display {
  font-size: 11px;
  color: var(--text-date);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 8px;
  font-family: inherit;
  transition: color 0.15s;
}

.date-display:hover {
  color: var(--text-date-hover);
}

.date-picker-hidden {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.nav-btn {
  background: none;
  border: none;
  color: var(--text-nav);
  font-size: 18px;
  cursor: pointer;
  padding: 8px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

.nav-btn:hover {
  color: var(--text-nav-hover);
  background: rgba(255, 255, 255, 0.06);
}

.nav-btn:disabled {
  opacity: 0.2;
  cursor: default;
}

/* ========================================
   Mobile tab bar
   ======================================== */
#mobile-tabs {
  display: flex;
  background: var(--bg-tab);
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 10px 0;
  background: none;
  border: none;
  color: var(--text-tab);
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn.active {
  color: var(--text-tab-active);
  border-bottom-color: var(--tab-active-border);
}

/* ========================================
   Layout
   ======================================== */
#main-layout {
  display: flex;
  height: calc(100% - 48px - 40px);
}

#viewer-container {
  position: relative;
  flex: 1;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-viewer);
  transition: background 0.2s;
}

#pdf-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  min-width: 100%;
  width: fit-content;
}

#pdf-canvas {
  display: block;
  filter: var(--pdf-filter);
  transition: filter 0.2s;
}

/* Zoom controls — fixed within viewer */
#zoom-controls {
  position: fixed;
  bottom: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 4px 6px;
  z-index: 6;
}

.zoom-btn {
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: #ccc;
  font-size: 18px;
  font-weight: 300;
  cursor: pointer;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, color 0.12s;
  font-family: system-ui, sans-serif;
}

.zoom-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.zoom-btn:active {
  background: rgba(255, 255, 255, 0.2);
}

.zoom-level {
  font-size: 11px;
  font-weight: 600;
  color: #999;
  min-width: 38px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.3px;
}

/* Sidebar — mobile hidden */
#sidebar {
  display: none;
}

/* Mobile tab switching */
body.show-info #viewer-container {
  display: none;
}

body.show-info #sidebar {
  display: flex;
  flex-direction: column;
  flex: 1;
  background: var(--bg-sidebar);
  overflow: hidden;
}

/* ========================================
   Overlays
   ======================================== */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--overlay-bg);
  z-index: 5;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: background 0.2s;
}

.hidden {
  display: none !important;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--spinner-track);
  border-top-color: var(--spinner-head);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.retry-btn {
  padding: 8px 24px;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--btn-border);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: background 0.15s;
}

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

/* ========================================
   Sidebar content
   ======================================== */
.sidebar-inner {
  padding: 28px 24px;
  height: 100%;
  overflow-y: auto;
}

.sidebar-section {
  margin-bottom: 32px;
}

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

.sidebar-heading {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-heading);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-empty {
  font-size: 13px;
  color: var(--text-tertiary);
  font-style: italic;
}

/* ---- Source articles ---- */
.source-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.source-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.12s;
}

.source-item:last-child {
  border-bottom: none;
}

.source-item:hover {
  background: var(--bg-sidebar-hover);
  margin: 0 -24px;
  padding: 16px 24px;
}

.source-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.source-category {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  background: var(--bg-badge);
  padding: 2px 8px;
  border-radius: 3px;
}

.source-name {
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.3px;
}

.source-link {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  line-height: 1.45;
  letter-spacing: -0.2px;
  transition: color 0.12s;
}

.source-link:hover {
  color: var(--text-link-hover);
}

.source-arrow {
  display: inline-block;
  font-size: 12px;
  color: var(--text-tertiary);
  margin-left: 4px;
  transition: transform 0.15s, color 0.15s;
}

.source-item:hover .source-arrow {
  color: var(--text-secondary);
  transform: translateX(2px);
}

/* ---- X Trends ---- */
.xtrend-list {
  display: flex;
  flex-direction: column;
}

.xtrend-item {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: background 0.12s;
  cursor: pointer;
}

.xtrend-item:last-child {
  border-bottom: none;
}

.xtrend-item:hover {
  background: var(--bg-sidebar-hover);
  margin: 0 -24px;
  padding: 14px 24px;
}

.xtrend-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.xtrend-headline {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}

.xtrend-source {
  font-size: 10px;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.xtrend-arrow {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.15s, color 0.15s;
}

.xtrend-item:hover .xtrend-arrow {
  color: var(--accent-blue);
  transform: translateX(2px);
}

.xtrend-summary {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  letter-spacing: 0.1px;
}

/* ---- Market grid ---- */
.market-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.market-card {
  background: var(--bg-card);
  border-radius: 6px;
  padding: 14px 16px;
  transition: background 0.15s;
}

.market-card:hover {
  background: var(--bg-card-hover);
}

.market-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.market-symbol {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

.market-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 3px;
  letter-spacing: 0.2px;
}

.market-badge.up {
  color: var(--color-up);
  background: var(--color-up-bg);
}

.market-badge.down {
  color: var(--color-down);
  background: var(--color-down-bg);
}

.market-badge.flat {
  color: var(--text-secondary);
  background: var(--bg-badge);
}

.market-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.market-price-snap {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
}

.market-price-label {
  font-size: 9px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.market-live-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: 4px;
}

.market-price-live {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.market-live-label {
  font-size: 9px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.market-live-change {
  font-size: 11px;
  font-weight: 500;
  margin-left: auto;
}

.market-live-change.up {
  color: var(--color-up);
}

.market-live-change.down {
  color: var(--color-down);
}

/* ========================================
   Desktop: 50/50 split
   ======================================== */
@media (min-width: 1024px) {
  #mobile-tabs {
    display: none;
  }

  #main-layout {
    display: flex;
    height: calc(100% - 48px);
  }

  #viewer-container {
    flex: 1;
  }

  body.show-info #viewer-container {
    display: flex;
  }

  #zoom-controls {
    right: calc(50% + 16px);
  }

  #sidebar {
    display: flex !important;
    flex-direction: column;
    flex: 1;
    background: var(--bg-sidebar);
    border-left: 1px solid var(--border);
    overflow: hidden;
    transition: background 0.2s;
  }
}


/* Scrollbar */
.sidebar-inner::-webkit-scrollbar {
  width: 4px;
}

.sidebar-inner::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-inner::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 2px;
}

.sidebar-inner::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-hover);
}