/* ============================================================
   HalisAI — giao diện theo ngôn ngữ thiết kế desktop OpenCode
   Ưu tiên điện thoại, tương thích máy tính.
   ============================================================ */

/* ---------- Fonts ---------- */
@font-face {
  font-family: "Inter";
  src: url("../fonts/Inter-Variable.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-Text.woff2") format("woff2");
  font-weight: 100 599;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-Bold.woff2") format("woff2");
  font-weight: 600 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-TextItalic.woff2") format("woff2");
  font-weight: 100 599;
  font-style: italic;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root,
[data-theme="light"] {
  color-scheme: light;
  --bg-app: #f8f8f8;
  --bg-panel: #f1f0f0;
  --bg-elevated: #fcfcfc;
  --bg-elevated-hi: #ffffff;
  --bg-inset: rgba(0, 0, 0, 0.045);
  --bg-inset-hi: rgba(0, 0, 0, 0.07);
  --bg-user-msg: rgba(0, 0, 0, 0.038);
  --bg-code: #f4f2f1;
  --text-1: #211e1e;
  --text-2: #656363;
  --text-3: #8f8b8b;
  --border: rgba(0, 0, 0, 0.1);
  --border-weak: rgba(0, 0, 0, 0.065);
  --accent: #004aff;
  --accent-soft: rgba(0, 74, 255, 0.1);
  --danger: #e5484d;
  --danger-soft: rgba(229, 72, 77, 0.1);
  --warn: #d97706;
  --usage-warn: #d97757;
  --usage-full: #e5484d;
  --seg-empty: rgba(0, 0, 0, 0.1);
  --shadow-sm: 0 1px 2px rgba(19, 16, 16, 0.06), 0 1px 3px rgba(19, 16, 16, 0.08);
  --shadow-md: 0 6px 16px -6px rgba(19, 16, 16, 0.16), 0 2px 6px -2px rgba(19, 16, 16, 0.1);
  --backdrop: rgba(19, 16, 16, 0.36);
  --send-bg: #211e1e;
  --send-fg: #fcfcfc;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg-app: #131010;
  --bg-panel: #171414;
  --bg-elevated: #1b1818;
  --bg-elevated-hi: #252121;
  --bg-inset: rgba(255, 255, 255, 0.05);
  --bg-inset-hi: rgba(255, 255, 255, 0.09);
  --bg-user-msg: rgba(255, 255, 255, 0.05);
  --bg-code: #201d1d;
  --text-1: #f1ecec;
  --text-2: #a5a09f;
  --text-3: #7f7979;
  --border: rgba(255, 255, 255, 0.09);
  --border-weak: rgba(255, 255, 255, 0.06);
  --accent: #5c8dff;
  --accent-soft: rgba(92, 141, 255, 0.14);
  --danger: #ff6369;
  --danger-soft: rgba(255, 99, 105, 0.12);
  --warn: #f59e0b;
  --usage-warn: #e08d6d;
  --usage-full: #ff6369;
  --seg-empty: rgba(255, 255, 255, 0.14);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 20px -8px rgba(0, 0, 0, 0.6), 0 2px 6px -2px rgba(0, 0, 0, 0.5);
  --backdrop: rgba(0, 0, 0, 0.55);
  --send-bg: #f1ecec;
  --send-fg: #131010;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
[x-cloak] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: -0.006em;
  color: var(--text-1);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior-y: none;
}

::selection { background: var(--accent-soft); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: var(--bg-inset-hi);
  border-radius: 5px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background-color: var(--text-3); }
::-webkit-scrollbar-track { background: transparent; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.hidden { display: none !important; }

/* ---------- Khung ứng dụng ---------- */
.app {
  display: grid;
  grid-template-columns: 1fr;
  height: 100dvh;
  height: 100svh;
}

.backdrop {
  position: fixed;
  inset: 0;
  background: var(--backdrop);
  z-index: 39;
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  inset-block: 0;
  inset-inline-start: 0;
  width: min(85vw, 300px);
  z-index: 40;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-inline-end: 1px solid var(--border-weak);
  transform: translateX(-102%);
  transition: transform 0.22s cubic-bezier(0.32, 0.72, 0, 1);
  padding-bottom: env(safe-area-inset-bottom);
}
.sidebar.open {
  transform: none;
  box-shadow: var(--shadow-md);
}

.sidebar-top {
  padding: 12px 12px 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  height: 34px;
  padding: 0 6px;
  margin-bottom: 10px;
}
.drawer-close { display: inline-grid; margin-inline-start: auto; }
@media (min-width: 900px) {
  .drawer-close { display: none; }
}
.brand-logo {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--text-1);
  color: var(--bg-elevated);
}
.brand-name {
  font-size: 15px;
  font-weight: 670;
  letter-spacing: -0.02em;
  color: var(--text-1);
}
.brand-name:hover { text-decoration: none; }
.brand-accent { color: var(--accent); }

.btn-newchat {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  height: 36px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-1);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition: background 0.15s, border-color 0.15s;
}
.btn-newchat:hover {
  background: var(--bg-elevated-hi);
  border-color: var(--border);
}

.conv-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 2px 8px 12px;
  overscroll-behavior: contain;
}

.conv-skeleton span {
  display: block;
  height: 28px;
  margin: 6px 4px;
  border-radius: 6px;
  background: var(--bg-inset);
  animation: pulse 1.6s ease-in-out infinite;
}
.conv-skeleton span:nth-child(2) { animation-delay: 0.15s; width: 82%; }
.conv-skeleton span:nth-child(3) { animation-delay: 0.3s; width: 64%; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.conv-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 36px 12px;
  color: var(--text-3);
  font-size: 12.5px;
  text-align: center;
}

.conv-group-label {
  padding: 14px 6px 5px;
  font-size: 10.5px;
  font-weight: 530;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
}

.conv-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.conv-item {
  position: relative;
  display: flex;
  align-items: center;
  border-radius: 7px;
}
.conv-item:hover { background: var(--bg-inset); }
.conv-item.active { background: var(--bg-inset-hi); }

.conv-link {
  flex: 1;
  min-width: 0;
  display: block;
  padding: 6px 30px 6px 9px;
  font-size: 13px;
  color: var(--text-2);
  border-radius: 7px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.conv-link:hover { text-decoration: none; color: var(--text-1); }
.conv-item.active .conv-link {
  color: var(--text-1);
  font-weight: 530;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  color: var(--text-3);
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.icon-btn:hover {
  background: var(--bg-inset-hi);
  color: var(--text-1);
}
.icon-btn.danger:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

.conv-del {
  position: absolute;
  inset-inline-end: 3px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  opacity: 0;
}
.conv-item:hover .conv-del { opacity: 1; }
.conv-del:hover { color: var(--danger); }

@media (hover: none) {
  .conv-del { opacity: 0.45; }
}

.sidebar-footer {
  border-top: 1px solid var(--border-weak);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--bg-panel);
}

.sb-action {
  display: flex;
  align-items: center;
  gap: 9px;
  height: 32px;
  padding: 0 9px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--text-2);
  transition: background 0.15s, color 0.15s;
}
.sb-action:hover {
  background: var(--bg-inset);
  color: var(--text-1);
  text-decoration: none;
}

.user-card {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 7px 4px;
  min-width: 0;
}

.avatar {
  width: 27px;
  height: 27px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.avatar-fallback {
  display: grid;
  place-items: center;
  background: var(--bg-inset-hi);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 530;
}

.user-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.user-name {
  font-size: 12.5px;
  font-weight: 530;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-mail {
  font-size: 11px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-btn { width: 26px; height: 26px; }

/* ---------- Vùng chính ---------- */
.main {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  position: relative;
}

.chat,
.settings-page {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 48px;
  padding: 0 10px;
  border-bottom: 1px solid var(--border-weak);
  background: var(--bg-app);
  flex-shrink: 0;
}

.topbar-title {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  font-weight: 530;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 2px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-inline-start: auto;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-1);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { background: var(--bg-elevated-hi); text-decoration: none; }

/* ---------- Thông báo toàn hệ thống ---------- */
.announcement {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 10px 12px 0;
  padding: 9px 12px;
  border: 1px solid var(--border-weak);
  border-radius: 10px;
  background: var(--bg-inset);
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-2);
}
.ann-icon { color: var(--text-3); margin-top: 1px; flex-shrink: 0; }
.ann-text { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.ann-close {
  color: var(--text-3);
  font-size: 16px;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 5px;
}
.ann-close:hover { background: var(--bg-inset-hi); color: var(--text-1); }

/* ---------- Dòng thời gian tin nhắn ---------- */
.messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 14px 14px 20px;
  overscroll-behavior-y: contain;
}

.msg {
  max-width: 768px;
  margin: 0 auto 22px;
}

.msg-meta {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 7px;
  min-height: 24px;
}

.msg-avatar {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--text-1);
  color: var(--bg-elevated);
}

.msg-author {
  font-size: 12px;
  font-weight: 620;
}
.author-user { color: var(--text-2); }

.msg-time {
  font-size: 11px;
  color: var(--text-3);
}

.msg-copy {
  width: 24px;
  height: 24px;
  opacity: 0;
  transition: opacity 0.15s;
}
.msg:hover .msg-copy { opacity: 1; }
@media (hover: none) {
  .msg-copy { opacity: 0.5; }
}
.msg-copy.copied { color: var(--accent); opacity: 1; }

/* Tin nhắn người dùng: khối nền nổi bật như desktop */
.msg-block {
  border: 1px solid var(--border-weak);
  background: var(--bg-user-msg);
  border-radius: 12px;
  padding: 10px 14px;
}
.msg-user-body {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Tin nhắn trợ lý */
.msg-body {
  font-size: 14.5px;
  line-height: 1.68;
  overflow-wrap: anywhere;
}
.msg-body > *:first-child { margin-top: 0; }
.msg-body > *:last-child { margin-bottom: 0; }
.msg-body p { margin: 0 0 0.8em; }
.msg-body h1, .msg-body h2, .msg-body h3, .msg-body h4, .msg-body h5 {
  margin: 1.35em 0 0.55em;
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.3;
}
.msg-body h1 { font-size: 1.3em; }
.msg-body h2 { font-size: 1.18em; }
.msg-body h3 { font-size: 1.07em; }
.msg-body h4, .msg-body h5 { font-size: 1em; }
.msg-body ul, .msg-body ol { margin: 0 0 0.8em; padding-inline-start: 1.45em; }
.msg-body li { margin: 0.25em 0; }
.msg-body li::marker { color: var(--text-3); }
.msg-body code {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86em;
  background: var(--bg-inset);
  border: 1px solid var(--border-weak);
  border-radius: 5px;
  padding: 0.08em 0.36em;
}
.msg-body pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.6;
}
.msg-body pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}
.code-block {
  margin: 0.9em 0;
  border: 1px solid var(--border-weak);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-code);
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 8px 5px 13px;
  border-bottom: 1px solid var(--border-weak);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--text-3);
}
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-family: inherit;
  color: var(--text-3);
  transition: background 0.15s, color 0.15s;
}
.copy-btn:hover {
  background: var(--bg-inset-hi);
  color: var(--text-1);
}
.msg-body blockquote {
  margin: 0 0 0.8em;
  padding: 2px 0 2px 13px;
  border-inline-start: 2.5px solid var(--border);
  color: var(--text-2);
}
.msg-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 1.4em 0;
}
.msg-body table {
  border-collapse: collapse;
  margin: 0.9em 0;
  display: block;
  overflow-x: auto;
  max-width: 100%;
  font-size: 13px;
}
.msg-body th, .msg-body td {
  border: 1px solid var(--border);
  padding: 6px 11px;
  text-align: left;
  vertical-align: top;
}
.msg-body th {
  background: var(--bg-inset);
  font-weight: 590;
}
.msg-body img { max-width: 100%; border-radius: 8px; }

/* Suy nghĩ */
.thinking {
  margin: 0 0 10px;
  border: 1px solid var(--border-weak);
  border-radius: 9px;
  background: var(--bg-inset);
  overflow: hidden;
}
.thinking summary {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  font-size: 12px;
  font-weight: 530;
  color: var(--text-2);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.thinking summary::-webkit-details-marker { display: none; }
.think-toggle {
  display: grid;
  place-items: center;
  transition: transform 0.18s ease;
}
.thinking[open] .think-toggle { transform: rotate(90deg); }
.think-body {
  max-height: 190px;
  overflow-y: auto;
  padding: 9px 12px;
  border-top: 1px solid var(--border-weak);
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-2);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Công cụ */
.tools-box {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin: 0 0 10px;
}
.tool-line {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 26px;
  padding: 3px 9px;
  border: 1px solid var(--border-weak);
  border-radius: 8px;
  background: var(--bg-inset);
  font-size: 12px;
}
.tool-icon { color: var(--text-3); display: grid; place-items: center; flex-shrink: 0; }
.tool-name {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--text-1);
  flex-shrink: 0;
}
.tool-summary {
  flex: 1;
  min-width: 0;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tool-ms {
  font-size: 10.5px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.tool-line.running .tool-summary { color: var(--accent); }
.tool-line.running .tool-icon {
  animation: spin 1s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Trạng thái đang tạo */
.ai-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
  padding: 2px 0 8px;
}
.ai-status .dots::after {
  content: "";
  animation: dots 1.4s steps(4, end) infinite;
}
@keyframes dots {
  0% { content: ""; }
  25% { content: "."; }
  50% { content: ".."; }
  75% { content: "..."; }
}
.cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
  border-radius: 1.5px;
}
@keyframes blink {
  50% { opacity: 0; }
}

/* Cảnh báo trong tin nhắn */
.notice {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 12.5px;
}
.notice-warn {
  background: var(--accent-soft);
  color: var(--text-1);
}
.notice-error {
  background: var(--danger-soft);
  color: var(--danger);
}
.notice-info {
  background: var(--bg-inset);
  color: var(--text-2);
}

/* Nút xuống cuối */
.scroll-bottom {
  position: absolute;
  inset-inline-start: 50%;
  transform: translateX(-50%);
  bottom: 128px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  color: var(--text-2);
  z-index: 5;
}
.scroll-bottom:hover { color: var(--text-1); background: var(--bg-elevated-hi); }

/* ---------- Vùng soạn thảo ---------- */
.composer-wrap {
  flex-shrink: 0;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 12px calc(10px + env(safe-area-inset-bottom));
}

.composer {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  padding: 11px 12px 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.composer:focus-within {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-sm);
}

.composer textarea {
  display: block;
  width: 100%;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  color: var(--text-1);
  font: inherit;
  font-size: 14.5px;
  line-height: 1.5;
  max-height: 180px;
  padding: 0 2px;
}
.composer textarea::placeholder { color: var(--text-3); }
.composer textarea:disabled { opacity: 0.55; }

.composer-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.model-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 10px;
  border: 1px solid var(--border-weak);
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-inset);
}
.model-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.composer-actions {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-send,
.btn-stop {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  transition: opacity 0.15s, transform 0.1s, background 0.15s;
}
.btn-send {
  background: var(--send-bg);
  color: var(--send-fg);
}
.btn-send:hover { transform: translateY(-1px); }
.btn-send.idle { opacity: 0.38; cursor: default; }
.btn-send.idle:hover { transform: none; }
.btn-stop {
  background: var(--bg-inset-hi);
  color: var(--text-1);
  border: 1px solid var(--border-weak);
}
.btn-stop:hover { background: var(--danger-soft); color: var(--danger); }

.composer-hint {
  text-align: center;
  font-size: 11px;
  color: var(--text-3);
  padding-top: 8px;
}

/* ---------- Mức dùng (kiểu Claude) ---------- */
.usage-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 0 auto 8px;
  max-width: 260px;
  padding: 4px 8px 2px;
  border-radius: 10px;
  transition: opacity 0.3s;
}
.usage-pill:hover { background: var(--bg-inset); }

.usage-segments {
  display: flex;
  gap: 3px;
  width: 100%;
}
.usage-segments .seg {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--seg-empty);
  transition: background 0.25s;
}
.usage-pill.warn .seg.fill,
.usage-card.warn .seg.fill { background: var(--usage-warn); }
.usage-pill.full .seg.fill,
.usage-card.full .seg.fill { background: var(--usage-full); }
.usage-pill:not(.warn):not(.full) .seg.fill,
.usage-card:not(.warn):not(.full) .seg.fill { background: var(--text-1); }

.usage-text {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 11px;
  color: var(--text-3);
  line-height: 1.4;
  text-align: center;
}
.usage-pill.full .usage-count { color: var(--usage-full); font-weight: 530; }
.usage-count b { font-weight: 530; color: var(--text-2); }
.usage-reset::before { content: "·"; margin-right: 5px; color: var(--text-3); }

/* ---------- Trang cài đặt ---------- */
.settings-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.settings-col {
  max-width: 620px;
  margin: 0 auto;
  padding: 18px 14px 56px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border-weak);
  border-radius: 13px;
  padding: 16px 17px;
  box-shadow: var(--shadow-sm);
}
.panel-title {
  margin: 0 0 3px;
  font-size: 13.5px;
  font-weight: 650;
}
.panel-desc {
  margin: 0 0 14px;
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.5;
}

.usage-card {
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: 14px;
  border: 1px solid var(--border-weak);
  border-radius: 10px;
  background: var(--bg-inset);
}
.usage-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.usage-plan { font-size: 12.5px; font-weight: 620; }
.usage-quota { font-size: 11.5px; color: var(--text-3); }

.usage-segments-lg .seg {
  height: 8px;
  border-radius: 4px;
}

.usage-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-2);
}
.usage-row b { font-weight: 620; color: var(--text-1); font-variant-numeric: tabular-nums; }
.usage-pct { font-weight: 620; color: var(--text-1); font-variant-numeric: tabular-nums; }
.usage-card.full .usage-pct { color: var(--usage-full); }

.usage-note { font-size: 11.5px; color: var(--text-3); line-height: 1.5; }
.usage-note .cd { font-weight: 620; color: var(--text-2); font-variant-numeric: tabular-nums; }
.usage-card.full .usage-note { color: var(--usage-full); }
.usage-card.full .usage-note .cd { color: var(--usage-full); }

/* Chọn chủ đề */
.theme-picker {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.theme-option {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--bg-elevated);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.theme-option:hover { border-color: var(--text-3); }
.theme-option[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.theme-check {
  position: absolute;
  top: 9px;
  inset-inline-end: 9px;
  color: var(--accent);
  opacity: 0;
}
.theme-option[aria-pressed="true"] .theme-check { opacity: 1; }

.theme-preview {
  display: flex;
  height: 62px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.14);
}
.light-preview { background: #fcfcfc; }
.light-preview .tp-side { background: #efeeee; }
.light-preview .tp-bar { background: #211e1e; width: 62%; height: 5px; border-radius: 2px; }
.light-preview .tp-block { background: #e4e2e2; width: 42%; height: 5px; border-radius: 2px; }
.dark-preview { background: #1b1818; border-color: rgba(255, 255, 255, 0.12); }
.dark-preview .tp-side { background: #141111; }
.dark-preview .tp-bar { background: #f1ecec; width: 62%; height: 5px; border-radius: 2px; }
.dark-preview .tp-block { background: #3a3535; width: 42%; height: 5px; border-radius: 2px; }
.tp-side { width: 27%; height: 100%; }
.tp-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 0 12px;
}
.theme-name { font-size: 12.5px; font-weight: 530; text-align: start; }

/* Chọn ngôn ngữ */
.lang-picker {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.lang-option {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  height: 46px;
  padding: 0 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated);
  font-size: 13.5px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.lang-option:hover { border-color: var(--text-3); }
.lang-option[aria-pressed="true"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.lang-flag { font-size: 17px; }
.lang-name { font-weight: 500; flex: 1; text-align: start; }
.lang-option .theme-check { position: static; opacity: 0; }
.lang-option[aria-pressed="true"] .theme-check { opacity: 1; }

/* Tài khoản */
.account-row {
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
}
.account-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.account-name { font-size: 13px; font-weight: 590; }
.account-mail {
  font-size: 11.5px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.role-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 590;
  letter-spacing: 0.02em;
  background: var(--bg-inset-hi);
  color: var(--text-2);
}
.role-admin { background: var(--danger-soft); color: var(--danger); }
.role-moderator { background: var(--accent-soft); color: var(--accent); }

/* ---------- Trang trống ---------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 14vh 8px 30px;
}
.empty-brand {
  font-size: 30px;
  font-weight: 300;
  letter-spacing: -0.025em;
  color: var(--text-1);
}
.empty-caret {
  display: inline-block;
  margin-left: 3px;
  width: 13px;
  height: 26px;
  vertical-align: -4px;
  background: var(--accent);
  border-radius: 2px;
  animation: blink 1.1s steps(1) infinite;
}
.empty-sub {
  margin: 10px 0 0;
  font-size: 13.5px;
  color: var(--text-2);
}
.chips {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  width: 100%;
  max-width: 520px;
  margin-top: 30px;
}
.chip {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid var(--border-weak);
  border-radius: 11px;
  background: transparent;
  font-size: 12.5px;
  color: var(--text-2);
  text-align: start;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.chip svg { color: var(--text-3); flex-shrink: 0; }
.chip:hover {
  border-color: var(--border);
  background: var(--bg-elevated);
  color: var(--text-1);
}

@media (min-width: 540px) {
  .chips { grid-template-columns: 1fr 1fr; }
}

/* ---------- Trang đăng nhập / lỗi ---------- */
.auth-body {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: 20px;
}
.auth-wrap {
  width: min(400px, 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.auth-card {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-weak);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  padding: 34px 30px 28px;
  text-align: center;
}
.auth-logo {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 15px;
  background: var(--text-1);
  color: var(--bg-elevated);
}
.auth-title {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 670;
  letter-spacing: -0.02em;
}
.auth-sub {
  margin: 0 0 22px;
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}
.auth-error {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin: 0 0 16px;
  padding: 9px 12px;
  border-radius: 9px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 12.5px;
}
.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-elevated-hi);
  font-size: 13.5px;
  font-weight: 530;
  color: var(--text-1);
  box-shadow: var(--shadow-sm);
  transition: background 0.15s;
}
.btn-google:hover { background: var(--bg-app); text-decoration: none; }
.auth-foot {
  margin: 16px 0 0;
  font-size: 11px;
  color: var(--text-3);
  line-height: 1.5;
}
.auth-pagefoot {
  font-size: 11.5px;
  color: var(--text-3);
}
.err-code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 15px;
  color: var(--text-3);
  margin-bottom: 6px;
}
.banned-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--danger-soft);
  color: var(--danger);
}
.banned-until { font-size: 13px; color: var(--text-1); margin: 4px 0 0; }
.banned-reason {
  margin: 12px 0 0;
  padding: 9px 12px;
  border-radius: 9px;
  background: var(--bg-inset);
  font-size: 12.5px;
  color: var(--text-2);
  text-align: start;
}
.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 20px;
  margin-top: 20px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-elevated-hi);
  font-size: 13px;
  font-weight: 530;
  box-shadow: var(--shadow-sm);
}
.btn-back:hover { text-decoration: none; background: var(--bg-app); }

/* ---------- Toast ---------- */
.toast-wrap {
  position: fixed;
  bottom: calc(18px + env(safe-area-inset-bottom));
  inset-inline: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 90;
  pointer-events: none;
}
.toast {
  max-width: min(420px, calc(100vw - 32px));
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--text-1);
  color: var(--bg-elevated);
  font-size: 12.5px;
  line-height: 1.45;
  box-shadow: var(--shadow-md);
  animation: toast-in 0.25s cubic-bezier(0.21, 1.02, 0.73, 1);
  transition: opacity 0.3s;
}
.toast-error { background: var(--danger); color: #fff; }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

/* ---------- Bảng quản trị ---------- */
.admin {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}
.admin-top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 50px;
  padding: 0 14px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-weak);
  overflow-x: auto;
}
.brand-sm {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 670;
  letter-spacing: -0.02em;
  color: var(--text-1);
  white-space: nowrap;
}
.brand-sm svg { color: var(--text-1); }
.brand-sm:hover { text-decoration: none; }
.admin-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
}
.admin-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}
.admin-tab:hover { background: var(--bg-inset); color: var(--text-1); text-decoration: none; }
.admin-tab.active {
  background: var(--bg-inset-hi);
  color: var(--text-1);
}
.admin-me {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-inline-start: auto;
}
.admin-main {
  flex: 1;
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  padding: 20px 14px 60px;
}

.page-head { margin-bottom: 18px; }
.page-head h1 { margin: 0; font-size: 17px; font-weight: 670; letter-spacing: -0.02em; }
.page-sub { display: block; margin-top: 3px; font-size: 12.5px; color: var(--text-2); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-weak);
  border-radius: 12px;
  padding: 13px 15px;
  box-shadow: var(--shadow-sm);
}
.stat-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--text-2);
  margin-bottom: 7px;
}
.stat-value {
  font-size: 24px;
  font-weight: 670;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.stat-note { margin-top: 3px; font-size: 11px; color: var(--text-3); }
.online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #30a46c;
  box-shadow: 0 0 0 3px rgba(48, 164, 108, 0.18);
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 150px;
  padding: 8px 2px 0;
}
.bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  gap: 4px;
  min-width: 0;
}
.bar {
  width: 100%;
  max-width: 34px;
  min-height: 2px;
  border-radius: 4px 4px 2px 2px;
  background: var(--accent);
  opacity: 0.85;
}
.bar-val { font-size: 9.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.bar-day {
  font-size: 9.5px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.mini-list { list-style: none; margin: 0; padding: 0; }
.mini-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 2px;
  border-bottom: 1px solid var(--border-weak);
  font-size: 12.5px;
}
.mini-row:last-child { border-bottom: 0; }
.mini-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.mini-name { font-weight: 530; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mini-sub {
  font-size: 11px;
  color: var(--text-3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mini-time { font-size: 11px; color: var(--text-3); margin-inline-start: auto; flex-shrink: 0; }
.mini-details {
  font-size: 11px;
  color: var(--text-3);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.avatar-sm { width: 24px; height: 24px; font-size: 10.5px; }
.action-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 550;
  background: var(--bg-inset-hi);
  color: var(--text-2);
  white-space: nowrap;
}

.admin-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.search-input {
  flex: 1;
  min-width: 220px;
  height: 36px;
  padding: 0 13px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-elevated);
  color: var(--text-1);
  font: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-input:focus {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.toolbar-note { font-size: 11.5px; color: var(--text-3); }

.table-scroll {
  background: var(--bg-elevated);
  border: 1px solid var(--border-weak);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
.admin-table th {
  text-align: left;
  padding: 9px 13px;
  background: var(--bg-inset);
  font-size: 11px;
  font-weight: 590;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
  white-space: nowrap;
}
.admin-table td {
  padding: 9px 13px;
  border-top: 1px solid var(--border-weak);
  vertical-align: top;
}
.td-dim { color: var(--text-2); }
.td-time { white-space: nowrap; }
.td-mono {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11.5px;
  overflow-wrap: anywhere;
}
.td-details { max-width: 260px; overflow-wrap: anywhere; }
.table-empty {
  text-align: center;
  color: var(--text-3);
  padding: 26px 13px !important;
}
.table-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 11px 13px;
  font-size: 11.5px;
  color: var(--text-3);
}
.pager { display: flex; align-items: center; gap: 8px; }
.pager-cur { font-size: 11.5px; color: var(--text-2); }
.btn-xs {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 11.5px;
  color: var(--text-2);
  background: var(--bg-elevated);
}
.btn-xs:hover { color: var(--text-1); text-decoration: none; background: var(--bg-elevated-hi); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 18px;
  border-radius: 9px;
  background: var(--send-bg);
  color: var(--send-fg);
  font-size: 13px;
  font-weight: 590;
}
.btn-primary:hover { opacity: 0.92; }
.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  padding: 0 10px;
  border-radius: 7px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 11.5px;
  font-weight: 550;
}
.btn-danger:hover { opacity: 0.85; }

.settings-form .field { display: block; margin-bottom: 14px; }
.field-label {
  display: block;
  font-size: 12px;
  font-weight: 550;
  margin-bottom: 6px;
  color: var(--text-1);
}
.field input[type="text"],
.field textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-app);
  color: var(--text-1);
  font: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field textarea { resize: vertical; min-height: 38px; }
.field input:focus,
.field textarea:focus {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.mono-textarea {
  font-family: "IBM Plex Mono", ui-monospace, monospace !important;
  font-size: 12px !important;
  line-height: 1.6;
}
.form-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.save-toast {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 9px 13px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 530;
}
.mt { margin-top: 20px; }
.panel-empty {
  padding: 26px 13px;
  text-align: center;
  color: var(--text-3);
  font-size: 12.5px;
}
.panel .panel-title { font-size: 13.5px; }
.panel .panel-desc { margin-bottom: 14px; }

.actions-cell { display: flex; gap: 4px; flex-wrap: wrap; }
.select-xs {
  height: 26px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg-elevated);
  color: var(--text-1);
  font: inherit;
  font-size: 11.5px;
}

/* ---------- Bố cục rộng ---------- */
@media (min-width: 900px) {
  .app { grid-template-columns: 264px minmax(0, 1fr); }
  .sidebar {
    position: sticky;
    top: 0;
    height: 100dvh;
    width: auto;
    transform: none;
    transition: none;
  }
  .sidebar.open { box-shadow: none; }
  .backdrop { display: none; }
  .menu-btn { display: none; }

  .messages { padding: 20px 24px 28px; }
  .composer-wrap { padding: 0 16px calc(14px + env(safe-area-inset-bottom)); }

  .stat-grid { grid-template-columns: repeat(4, 1fr); }
  .panel-grid { grid-template-columns: 3fr 2fr; }
  .admin-main { padding: 26px 22px 60px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}