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

:root {
  --bg:         #0f1117;
  --bg2:        #181c24;
  --bg3:        #1e2330;
  --border:     #2a3042;
  --border2:    #363d52;
  --text:       #e4e6ef;
  --text2:      #8b92aa;
  --text3:      #555f78;
  --accent:     #4f8ef7;
  --accent2:    #3a70d4;
  --green:      #34d399;
  --amber:      #fbbf24;
  --red:        #f87171;
  --teal:       #22d3ee;
  --radius:     12px;
  --radius-sm:  8px;
  --shadow:     0 4px 24px rgba(0,0,0,.4);
}

html { font-size: 15px; scroll-behavior: smooth; }

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

/* ── Layout ───────────────────────────────────────────────────── */
.container { max-width: 900px; margin: 0 auto; padding: 0 1rem; }

/* ── Header ───────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, #1a2138 0%, #141927 100%);
  border-bottom: 1px solid var(--border);
  padding: 2rem 0 1.5rem;
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-icon { font-size: 2.2rem; }

.header-text h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}

.subtitle {
  color: var(--text2);
  font-size: .875rem;
  margin-top: .15rem;
}

/* ── Cards ────────────────────────────────────────────────────── */
.card, .summary-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.25rem 0;
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: .02em;
  text-transform: uppercase;
  font-size: .8rem;
  color: var(--text2);
}

/* ── Summary Card ─────────────────────────────────────────────── */
.summary-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
  background: linear-gradient(135deg, #1b2236 0%, #181c24 100%);
  border-color: var(--border2);
}

@media (max-width: 640px) {
  .summary-card { grid-template-columns: 1fr; }
}

.summary-about h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: .6rem;
  color: var(--text);
}

.summary-about p {
  color: var(--text2);
  font-size: .9rem;
  line-height: 1.7;
}

.alert-badge {
  display: inline-block;
  margin-top: .8rem;
  background: rgba(248, 113, 113, .12);
  color: var(--red);
  border: 1px solid rgba(248, 113, 113, .25);
  border-radius: 6px;
  padding: .3rem .7rem;
  font-size: .78rem;
  font-weight: 600;
}

.summary-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  min-width: 200px;
}

.stat-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .85rem 1rem;
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: .3rem;
}

.stat-label {
  display: block;
  font-size: .7rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ── Activity Chart ───────────────────────────────────────────── */
.chart-wrap { overflow-x: auto; }

.chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 90px;
  padding: 0 0 4px;
  min-width: 400px;
}

.chart-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
  cursor: default;
  position: relative;
}

.chart-bar {
  width: 100%;
  min-height: 2px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  transition: background .15s;
  opacity: .7;
}

.chart-bar-wrap:hover .chart-bar { background: var(--teal); opacity: 1; }

.chart-bar-wrap[data-peak="1"] .chart-bar { background: var(--amber); opacity: .9; }

.chart-tooltip {
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: .3rem .6rem;
  font-size: .72rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
  z-index: 10;
  color: var(--text);
}

.chart-bar-wrap:hover .chart-tooltip { opacity: 1; }

.chart-month {
  font-size: .55rem;
  color: var(--text3);
  margin-top: 4px;
  text-align: center;
  line-height: 1;
}

.chart-note {
  font-size: .78rem;
  color: var(--text3);
  margin-top: .75rem;
  padding-top: .75rem;
  border-top: 1px solid var(--border);
  font-style: italic;
}

/* ── Members Grid ─────────────────────────────────────────────── */
.members-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.member-tag {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: .35rem .8rem;
  font-size: .8rem;
  display: flex;
  align-items: center;
  gap: .4rem;
  cursor: default;
  transition: border-color .15s;
}

.member-tag:hover { border-color: var(--accent); }

.member-count {
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: .05rem .45rem;
  font-size: .7rem;
  font-weight: 600;
}

/* ── Chat Toolbar ─────────────────────────────────────────────── */
.chat-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1rem;
}

.toolbar-controls {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
}

.search-wrap input {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: .45rem .75rem .45rem 2rem;
  font-size: .85rem;
  width: 200px;
  outline: none;
  transition: border-color .15s;
}

.search-wrap input:focus { border-color: var(--accent); }

.search-icon {
  position: absolute;
  left: .5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: .85rem;
  pointer-events: none;
}

select#sender-filter {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: .45rem .75rem;
  font-size: .85rem;
  outline: none;
  cursor: pointer;
}

/* ── Pagination ───────────────────────────────────────────────── */
.chat-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .5rem 0;
  margin-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

.bottom-nav {
  border-bottom: none;
  border-top: 1px solid var(--border);
  margin-bottom: 0;
  margin-top: .75rem;
  padding-top: .75rem;
}

.page-info { font-size: .8rem; color: var(--text3); }

.page-buttons { display: flex; align-items: center; gap: .4rem; }

.btn-page {
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text2);
  border-radius: 6px;
  padding: .35rem .65rem;
  font-size: .82rem;
  cursor: pointer;
  transition: all .15s;
}

.btn-page:hover:not(:disabled) { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-page:disabled { opacity: .35; cursor: default; }

.page-num {
  font-size: .82rem;
  color: var(--text2);
  padding: 0 .25rem;
  min-width: 60px;
  text-align: center;
}

/* ── Messages ─────────────────────────────────────────────────── */
.messages-wrap { min-height: 200px; }

.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text3);
  font-size: .9rem;
}

/* Date separator */
.date-separator {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin: 1.25rem 0 .75rem;
}

.date-separator::before,
.date-separator::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.date-label {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 20px;
  padding: .2rem .75rem;
  font-size: .72rem;
  color: var(--text3);
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: .03em;
}

/* Message bubble */
.msg {
  display: flex;
  gap: .65rem;
  margin: .35rem 0;
  padding: .15rem 0;
}

.msg.joined .avatar { visibility: hidden; }

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  color: #fff;
  margin-top: .15rem;
}

/* Avatar colors matching Telegram's color scheme */
.ava-c1 { background: #e17076; }
.ava-c2 { background: #7bc862; }
.ava-c3 { background: #65aadd; }
.ava-c4 { background: #a695e7; }
.ava-c5 { background: #ee7aae; }
.ava-c6 { background: #6ec9cb; }
.ava-c7 { background: #faa774; }
.ava-c8 { background: #e17076; }
.ava-default { background: #555f78; }

.msg-body {
  flex: 1;
  min-width: 0;
}

.msg-meta {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  margin-bottom: .2rem;
}

.msg-sender {
  font-size: .8rem;
  font-weight: 600;
  color: var(--accent);
}

.msg-time {
  font-size: .72rem;
  color: var(--text3);
}

.msg-text {
  font-size: .875rem;
  color: var(--text);
  line-height: 1.65;
  word-break: break-word;
  white-space: pre-wrap;
}

.msg-text a {
  color: var(--accent);
  text-decoration: none;
}
.msg-text a:hover { text-decoration: underline; }

/* Reply quote */
.msg-reply {
  background: var(--bg3);
  border-left: 3px solid var(--accent2);
  border-radius: 0 6px 6px 0;
  padding: .3rem .6rem;
  margin-bottom: .35rem;
  font-size: .78rem;
  color: var(--text2);
  font-style: italic;
}

/* Media */
.msg-media {
  margin-top: .4rem;
}

.msg-media img {
  border-radius: 8px;
  max-width: 260px;
  max-height: 200px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border);
  cursor: pointer;
}

.msg-media .media-label {
  font-size: .75rem;
  color: var(--text3);
  margin-top: .25rem;
}

/* Highlight search match */
mark {
  background: rgba(251, 191, 36, .3);
  color: var(--amber);
  border-radius: 2px;
  padding: 0 2px;
}

/* No results */
.no-results {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text3);
}

/* ── Footer ───────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  padding: 1.25rem 0;
}

.site-footer p {
  text-align: center;
  font-size: .78rem;
  color: var(--text3);
}

/* ── Tabs ─────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: .5rem;
  margin: 1.25rem 0 0;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}

.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--text2);
  font-size: .9rem;
  font-weight: 500;
  padding: .6rem 1.1rem;
  cursor: pointer;
  transition: color .15s, border-color .15s;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.tab-btn:hover { color: var(--text); background: var(--bg3); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: none;
}

/* ── Digest ───────────────────────────────────────────────────── */
.digest-section { margin-top: 0; border-radius: 0 var(--radius) var(--radius) var(--radius); }

.digest-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: .5rem;
}

.digest-controls {
  display: flex;
  gap: .35rem;
}

.digest-toggle {
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text2);
  border-radius: 20px;
  padding: .35rem .9rem;
  font-size: .82rem;
  cursor: pointer;
  transition: all .15s;
}

.digest-toggle.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.digest-toggle:hover:not(.active) { border-color: var(--accent); color: var(--accent); }

/* Digest cards grid */
.digest-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.digest-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color .15s;
}

.digest-card:hover { border-color: var(--border2); }

.digest-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1rem;
  cursor: pointer;
  gap: 1rem;
  user-select: none;
}

.digest-card-header:hover { background: rgba(255,255,255,.02); }

.digest-date-label {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}

.digest-week-range {
  font-size: .75rem;
  color: var(--text3);
  margin-top: .1rem;
}

.digest-meta {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
}

.digest-badge {
  background: rgba(79, 142, 247, .12);
  color: var(--accent);
  border: 1px solid rgba(79, 142, 247, .2);
  border-radius: 10px;
  padding: .2rem .6rem;
  font-size: .75rem;
  font-weight: 600;
  white-space: nowrap;
}

.digest-badge.green {
  background: rgba(52, 211, 153, .1);
  color: var(--green);
  border-color: rgba(52, 211, 153, .2);
}

.digest-participants {
  font-size: .75rem;
  color: var(--text3);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.digest-chevron {
  color: var(--text3);
  font-size: .8rem;
  flex-shrink: 0;
  transition: transform .2s;
}

.digest-card.open .digest-chevron { transform: rotate(180deg); }

.digest-body {
  display: none;
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--border);
}

.digest-card.open .digest-body { display: block; }

.digest-summary {
  background: rgba(79, 142, 247, .07);
  border: 1px solid rgba(79, 142, 247, .18);
  border-radius: var(--radius-sm);
  padding: .65rem .85rem;
  font-size: .84rem;
  color: var(--text);
  line-height: 1.65;
  margin-top: .75rem;
}

.highlight-label {
  font-size: .72rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-top: .85rem;
  margin-bottom: .4rem;
}

.digest-highlights {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.highlight-msg {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent2);
  border-radius: 0 6px 6px 0;
  padding: .6rem .75rem;
}

.highlight-sender {
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: .25rem;
}

.highlight-time {
  font-size: .7rem;
  color: var(--text3);
  margin-left: .4rem;
  font-weight: 400;
}

.highlight-text {
  font-size: .82rem;
  color: var(--text2);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.digest-empty {
  font-size: .8rem;
  color: var(--text3);
  font-style: italic;
  padding: .5rem 0;
}

/* Heat intensity on digest cards */
.digest-card[data-heat="low"]    .digest-card-header { border-left: 3px solid rgba(79,142,247,.3); }
.digest-card[data-heat="mid"]    .digest-card-header { border-left: 3px solid rgba(251,191,36,.5); }
.digest-card[data-heat="high"]   .digest-card-header { border-left: 3px solid rgba(248,113,113,.6); }
.digest-card[data-heat="peak"]   .digest-card-header { border-left: 3px solid var(--red); }

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 500px) {
  .site-header { position: static; }
  .chat-toolbar { flex-direction: column; align-items: flex-start; }
  .search-wrap input { width: 100%; }
  .summary-stats { grid-template-columns: repeat(2, 1fr); min-width: unset; }
}