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

:root {
  --sidebar-bg: #0a0a1f;
  --sidebar-fg: #7dd3fc;
  --sidebar-hover: #111133;
  --sidebar-active: #00e5ff;
  --sidebar-active-bg: #003322;
  --main-bg: #080818;
  --header-bg: #0a0a1f;
  --border: #1a3a5c;
  --text: #c8d6e5;
  --subtext: #5a9abf;
  --composer-bg: #0a0a1f;
  --accent: #00e5ff;
  --accent2: #ff0066;
  --accent-hover: #00bbcc;
  --msg-hover: #0d1525;
  --font-retro: 'VT323', 'Courier New', monospace;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --sidebar-width: 240px;
}

html, body { height: 100%; font-family: var(--font); font-size: 15px; color: var(--text); background: var(--main-bg); }

#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ───────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-fg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 2px solid var(--border);
}

#workspace-header {
  padding: 18px 16px 14px;
  font-family: var(--font-retro);
  font-weight: 400;
  font-size: 22px;
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0,229,255,0.6);
  border-bottom: 2px solid var(--border);
  flex-shrink: 0;
  letter-spacing: 0.04em;
}

#channel-list-header {
  padding: 14px 16px 6px;
  font-family: var(--font-retro);
  font-size: 16px;
  font-weight: 400;
  color: var(--subtext);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

#channel-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 0 0 16px;
}

#channel-list::-webkit-scrollbar { width: 4px; }
#channel-list::-webkit-scrollbar-track { background: transparent; }
#channel-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }

#channel-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  cursor: pointer;
  border-radius: 0;
  margin: 1px 0;
  font-family: var(--font-retro);
  font-size: 18px;
  color: var(--sidebar-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.1s, color 0.1s;
  border-left: 3px solid transparent;
}

#channel-list li:hover { background: var(--sidebar-hover); color: var(--accent); border-left-color: var(--accent); }

#channel-list li.active {
  background: var(--sidebar-active-bg);
  color: var(--accent);
  border-left: 3px solid var(--accent);
  text-shadow: 0 0 6px rgba(0,229,255,0.5);
}

#channel-list li .ch-icon {
  font-size: 14px;
  opacity: 0.8;
  flex-shrink: 0;
}

#channel-list li .ch-name {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Main ──────────────────────────────────────────── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--main-bg);
}

#channel-header {
  padding: 12px 20px;
  border-bottom: 2px solid var(--border);
  font-family: var(--font-retro);
  font-size: 22px;
  font-weight: 400;
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0,229,255,0.4);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  background: var(--header-bg);
  display: flex;
  align-items: center;
  gap: 6px;
}

#channel-header::before {
  content: '#';
  color: var(--subtext);
}

/* ── Messages ──────────────────────────────────────── */
#messages-container {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  padding: 0 20px 8px;
}

#messages-container::-webkit-scrollbar { width: 6px; }
#messages-container::-webkit-scrollbar-track { background: transparent; }
#messages-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }

#load-more-wrap {
  display: flex;
  justify-content: center;
  padding: 12px 0;
}

#load-more-btn {
  background: transparent;
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 5px 16px;
  font-family: var(--font-retro);
  font-size: 16px;
  cursor: pointer;
  color: var(--subtext);
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}
#load-more-btn:hover { background: var(--msg-hover); color: var(--accent); border-color: var(--accent); }

.hidden { display: none !important; }

#messages { display: flex; flex-direction: column; gap: 0; }

.msg {
  display: flex;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 0;
  transition: background 0.1s;
}
.msg:hover { background: var(--msg-hover); }

.msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 0;
  background: var(--accent);
  color: #050510;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-retro);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  object-fit: cover;
  image-rendering: pixelated;
}

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

.msg-meta {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 2px;
}

.msg-user {
  font-family: var(--font-retro);
  font-size: 18px;
  font-weight: 400;
  color: var(--accent);
}

.msg-time {
  font-size: 11.5px;
  color: var(--subtext);
}

.msg-text {
  font-size: 14.5px;
  line-height: 1.5;
  word-break: break-word;
  white-space: pre-wrap;
  color: var(--text);
}

/* Slack mrkdwn bold/italic */
.msg-text b { font-weight: 700; color: #e2e8f0; }
.msg-text i { font-style: italic; }
.msg-text code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 12.5px;
  background: #0d1b2a;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0 4px;
  color: var(--accent);
}

.msg-files { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 8px; }

.file-img-wrap {
  cursor: pointer;
  border-radius: 0;
  overflow: hidden;
  border: 2px solid var(--border);
  max-width: 360px;
  transition: border-color 0.15s;
}
.file-img-wrap:hover { border-color: var(--accent); }
.file-img-wrap img {
  display: block;
  max-width: 360px;
  max-height: 280px;
  object-fit: cover;
}

.file-attachment {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--border);
  border-radius: 0;
  font-size: 13px;
  color: var(--subtext);
  background: #0d1b2a;
}

/* date dividers */
.date-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 8px;
  color: var(--subtext);
  font-family: var(--font-retro);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.06em;
}
.date-divider::before,
.date-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Composer ──────────────────────────────────────── */
#composer {
  padding: 10px 20px 14px;
  border-top: 2px solid var(--border);
  background: var(--composer-bg);
  flex-shrink: 0;
}

#composer-inner {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 8px 10px;
  transition: border-color 0.15s, box-shadow 0.15s;
  background: #080818;
}

#composer-inner:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,229,255,0.15);
}

#msg-input {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font);
  font-size: 14.5px;
  line-height: 1.5;
  background: transparent;
  max-height: 200px;
  overflow-y: auto;
  color: var(--text);
  caret-color: var(--accent);
}

#msg-input::placeholder { color: var(--subtext); }

#upload-label {
  cursor: pointer;
  color: var(--subtext);
  opacity: 0.7;
  transition: opacity 0.15s, color 0.15s;
  flex-shrink: 0;
}
#upload-label:hover { opacity: 1; color: var(--accent); }
#upload-label svg { width: 20px; height: 20px; display: block; }
#upload-label input { display: none; }

#send-btn {
  background: var(--accent);
  color: #050510;
  border: none;
  border-radius: 0;
  padding: 6px 14px;
  font-family: var(--font-retro);
  font-size: 18px;
  font-weight: 400;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, box-shadow 0.15s;
  letter-spacing: 0.04em;
}
#send-btn:hover:not(:disabled) { background: var(--accent-hover); box-shadow: 0 0 8px rgba(0,229,255,0.5); }
#send-btn:disabled { background: #1a3a5c; color: var(--subtext); cursor: not-allowed; }

#upload-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 5px 10px;
  background: #0d1b2a;
  border: 1px solid var(--border);
  border-radius: 0;
  font-size: 13px;
  color: var(--accent);
}

#upload-cancel {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  color: var(--subtext);
  margin-left: auto;
  transition: color 0.1s;
}
#upload-cancel:hover { color: var(--accent2); }

/* ── Lightbox ──────────────────────────────────────── */
#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

#lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: var(--accent);
  font-family: var(--font-retro);
  font-size: 32px;
  cursor: pointer;
  line-height: 1;
  opacity: 0.8;
  transition: opacity 0.1s, text-shadow 0.1s;
}
#lightbox-close:hover { opacity: 1; text-shadow: 0 0 10px rgba(0,229,255,0.8); }

#lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 0;
  border: 2px solid var(--accent);
  object-fit: contain;
}

/* ── Loading / error states ───────────────────────── */
.loading-placeholder {
  color: var(--subtext);
  font-family: var(--font-retro);
  font-size: 18px;
  padding: 40px 0;
  text-align: center;
  letter-spacing: 0.04em;
}

.error-toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent2);
  color: #fff;
  padding: 10px 20px;
  border-radius: 0;
  font-family: var(--font-retro);
  font-size: 18px;
  z-index: 2000;
  opacity: 1;
  transition: opacity 0.4s;
  border: 2px solid #ff6699;
  box-shadow: 0 0 12px rgba(255,0,102,0.5);
  letter-spacing: 0.04em;
}

/* ── Thread panel ──────────────────────────────────── */
#thread-panel {
  width: 360px;
  min-width: 360px;
  border-left: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--sidebar-bg);
}

#thread-header {
  padding: 12px 20px;
  border-bottom: 2px solid var(--border);
  font-family: var(--font-retro);
  font-size: 20px;
  color: var(--accent);
  text-shadow: 0 0 6px rgba(0,229,255,0.4);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

#thread-close {
  background: none;
  border: none;
  font-family: var(--font-retro);
  font-size: 22px;
  cursor: pointer;
  color: var(--subtext);
  padding: 2px 6px;
  border-radius: 0;
  transition: color 0.1s;
  line-height: 1;
}
#thread-close:hover { color: var(--accent2); }

#thread-messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px 8px;
}
#thread-messages-container::-webkit-scrollbar { width: 6px; }
#thread-messages-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }

#thread-messages { display: flex; flex-direction: column; }

/* Thread parent message separator */
.thread-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0 12px;
  color: var(--subtext);
  font-family: var(--font-retro);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.06em;
}
.thread-divider::before, .thread-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

#thread-composer {
  padding: 8px 12px 12px;
  border-top: 2px solid var(--border);
  flex-shrink: 0;
}

#thread-composer-inner {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 7px 10px;
  background: #080818;
  transition: border-color 0.15s, box-shadow 0.15s;
}
#thread-composer-inner:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,229,255,0.15);
}

#thread-input {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  background: transparent;
  max-height: 120px;
  overflow-y: auto;
  color: var(--text);
  caret-color: var(--accent);
}
#thread-input::placeholder { color: var(--subtext); }

#thread-send-btn {
  background: var(--accent);
  color: #050510;
  border: none;
  border-radius: 0;
  padding: 5px 12px;
  font-family: var(--font-retro);
  font-size: 16px;
  font-weight: 400;
  cursor: pointer;
  flex-shrink: 0;
  letter-spacing: 0.04em;
  transition: background 0.15s, box-shadow 0.15s;
}
#thread-send-btn:hover:not(:disabled) { background: var(--accent-hover); box-shadow: 0 0 8px rgba(0,229,255,0.5); }
#thread-send-btn:disabled { background: #1a3a5c; color: var(--subtext); cursor: not-allowed; }

/* ── Reply count & hover actions ───────────────────── */
.msg { position: relative; }

.msg-actions {
  position: absolute;
  right: 8px;
  top: 4px;
  opacity: 0;
  transition: opacity 0.1s;
  display: flex;
  gap: 4px;
}
.msg:hover .msg-actions { opacity: 1; }

.reply-btn {
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 3px 9px;
  cursor: pointer;
  font-family: var(--font-retro);
  font-size: 14px;
  color: var(--subtext);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
}
.reply-btn:hover { background: var(--msg-hover); border-color: var(--accent); color: var(--accent); }

.thread-link {
  margin-top: 4px;
  font-family: var(--font-retro);
  font-size: 15px;
  color: var(--accent);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  letter-spacing: 0.02em;
}
.thread-link:hover { text-decoration: underline; text-shadow: 0 0 6px rgba(0,229,255,0.5); }
.thread-link .reply-avatars {
  display: inline-flex;
  gap: 2px;
  margin-right: 2px;
}
.thread-link .reply-av {
  width: 18px;
  height: 18px;
  border-radius: 0;
  font-size: 10px;
  font-weight: 700;
  color: #050510;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ── Layout: shrink main when thread panel is open ─── */
#main { min-width: 0; }

/* ── Login screen ──────────────────────────────────── */
#login-screen {
  position: fixed;
  inset: 0;
  background: #050510;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
}

/* Subtle scanline overlay effect */
#login-screen::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,229,255,0.02) 2px,
    rgba(0,229,255,0.02) 4px
  );
  pointer-events: none;
  z-index: 1;
}

#login-box {
  position: relative;
  z-index: 2;
  background: #0a0a1f;
  border: 2px solid var(--accent);
  border-radius: 0;
  padding: 40px 44px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 0 30px rgba(0,229,255,0.2), 0 0 60px rgba(0,229,255,0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

#login-logo { margin-bottom: 4px; }

#login-box h1 {
  font-family: var(--font-retro);
  font-size: 42px;
  font-weight: 400;
  color: var(--accent);
  text-shadow: 0 0 16px rgba(0,229,255,0.7), 0 0 32px rgba(0,229,255,0.4);
  letter-spacing: 0.12em;
}

.login-hint {
  font-family: var(--font-retro);
  font-size: 15px;
  color: var(--subtext);
  text-align: center;
  line-height: 1.8;
  letter-spacing: 0.02em;
}
.login-hint code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 12px;
  background: #0d1b2a;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1px 5px;
  color: var(--accent);
}

#token-input {
  width: 100%;
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 10px 14px;
  font-size: 14px;
  font-family: 'SFMono-Regular', Consolas, monospace;
  outline: none;
  background: #080818;
  color: var(--text);
  caret-color: var(--accent);
  transition: border-color 0.15s, box-shadow 0.15s;
}
#token-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,229,255,0.15);
}

#login-btn {
  width: 100%;
  background: var(--accent);
  color: #050510;
  border: none;
  border-radius: 0;
  padding: 11px;
  font-family: var(--font-retro);
  font-size: 22px;
  font-weight: 400;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: background 0.15s, box-shadow 0.15s;
}
#login-btn:hover:not(:disabled) { background: var(--accent-hover); box-shadow: 0 0 16px rgba(0,229,255,0.5); }
#login-btn:disabled { background: #1a3a5c; color: var(--subtext); cursor: not-allowed; }

#login-error {
  width: 100%;
  background: rgba(255,0,102,0.15);
  border: 2px solid var(--accent2);
  color: #ff6699;
  border-radius: 0;
  padding: 8px 12px;
  font-family: var(--font-retro);
  font-size: 16px;
  text-align: center;
  letter-spacing: 0.04em;
}

/* ── Logout button ─────────────────────────────────── */
#workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#logout-btn {
  background: none;
  border: none;
  color: var(--subtext);
  font-family: var(--font-retro);
  font-size: 20px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 0;
  transition: color 0.15s;
  line-height: 1;
}
#logout-btn:hover { color: var(--accent2); }