/* ============ 基础 ============ */
* { box-sizing: border-box; }

:root {
  --bg: #f7f9fc;
  --card: #ffffff;
  --ink: #102a43;
  --ink-soft: #627d98;
  --line: #d9e2ec;
  --green: #1f5f9e;
  --green-deep: #123d68;
  --green-bg: #eaf2fa;
  --blue: #2f80c7;
  --blue-deep: #174f86;
  --blue-bg: #edf5fc;
  --radius: 12px;
  --shadow: 0 4px 14px rgba(16, 42, 67, 0.05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============ 顶栏 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(217, 226, 236, 0.82);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 17px;
}

.brand-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }

.brand-area { position: relative; display: flex; align-items: center; }

.avatar-status-trigger {
  position: absolute;
  z-index: 1;
  left: 20px;
  top: 22px;
  display: grid;
  width: 19px;
  height: 19px;
  place-items: center;
  overflow: hidden;
  padding: 0;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--blue-bg);
  color: var(--blue-deep);
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 1px 5px rgba(16, 42, 67, 0.2);
}

.avatar-status-trigger:hover { transform: scale(1.08); }
.avatar-status-trigger:focus-visible { outline: 3px solid rgba(47, 128, 199, 0.35); outline-offset: 2px; }
.avatar-status-trigger img { width: 100%; height: 100%; object-fit: cover; }

.site-nav { display: flex; align-items: center; gap: 4px; }

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 10px 7px;
  font-size: 14px;
  transition: color 0.2s;
}

.site-nav a:hover { color: var(--blue-deep); }

.site-nav a:last-child {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  margin-left: 5px;
  padding: 8px 16px;
  border-radius: 10px;
  background: var(--blue-deep);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 5px 12px rgba(23, 79, 134, 0.18);
}

.site-nav a:last-child:hover { background: #0d345a; color: #fff; }

.site-nav a:focus-visible,
.tab:focus-visible,
.chat-suggest button:focus-visible,
.chat-form button:focus-visible {
  outline: 3px solid rgba(47, 128, 199, 0.28);
  outline-offset: 3px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  isolation: isolate;
  text-align: center;
  padding: 54px 16px 42px;
  background: linear-gradient(135deg, #f8fbff 0%, #edf5fc 100%);
  border-bottom: 1px solid #e2ebf4;
}

.hero-avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto 22px;
  border-radius: 50%;
  border: 4px solid #fff;
  object-fit: cover;
  box-shadow: 0 8px 22px rgba(23, 79, 134, 0.14);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 38px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.6px;
}

.tagline {
  max-width: 28rem;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.7;
}

.chips {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.chips li {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid #d9e5f0;
  color: var(--blue-deep);
  font-size: 12.5px;
  padding: 6px 13px;
  border-radius: 999px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.button-primary {
  background: var(--blue-deep);
  color: #fff;
  box-shadow: 0 5px 12px rgba(23, 79, 134, 0.18);
}

.button-primary:hover { background: #0d345a; }

.button-secondary {
  border: 1px solid #cbdceb;
  background: rgba(255, 255, 255, 0.7);
  color: var(--blue-deep);
}

.button-secondary:hover { border-color: var(--blue); background: #fff; }

.button-primary:focus-visible,
.button-secondary:focus-visible {
  outline: 3px solid rgba(47, 128, 199, 0.28);
  outline-offset: 3px;
}

.status-dialog {
  width: min(100% - 32px, 460px);
  max-height: min(720px, calc(100vh - 32px));
  padding: 20px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--ink);
  background: var(--card);
  box-shadow: 0 20px 60px rgba(16, 42, 67, 0.2);
}

.status-dialog::backdrop { background: rgba(16, 42, 67, 0.35); }
.status-dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.status-dialog-heading .eyebrow { margin-bottom: 3px; }
.status-dialog-heading h2 { margin: 0; font-size: 21px; line-height: 1.3; }
.dialog-close { width: 36px; height: 36px; border: 0; border-radius: 9px; background: var(--blue-bg); color: var(--blue-deep); font-size: 24px; line-height: 1; cursor: pointer; }

.status-form { display: grid; gap: 14px; }
.status-form label { display: grid; gap: 6px; color: var(--ink); font-size: 13px; font-weight: 650; }
.status-form label small { color: var(--ink-soft); font-weight: 400; }
.status-form select,
.status-form input[type="text"],
.status-form input[type="file"] { width: 100%; min-height: 42px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--ink); font: inherit; font-size: 14px; }
.status-form input[type="file"] { padding: 7px; font-size: 13px; }
.status-form select:focus,
.status-form input:focus { border-color: var(--blue); outline: none; }
.status-form-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 9px; margin-top: 3px; }
.status-form-actions .button-primary,
.status-form-actions .button-secondary { border: 0; cursor: pointer; font: inherit; }
.status-form-actions .button-secondary { border: 1px solid #cbdceb; }

/* ============ 通用区块 ============ */
.section {
  max-width: 920px;
  margin: 0 auto;
  padding: 26px 16px 6px;
  scroll-margin-top: 76px;
}

.section h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 22px;
}

.section h2::before {
  content: "";
  width: 6px;
  height: 20px;
  border-radius: 4px;
  background: var(--blue);
}

.card {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: none;
}

.card h3 { margin: 0 0 12px; font-size: 17px; }
.card h4 { margin: 0 0 10px; font-size: 13.5px; color: var(--ink-soft); font-weight: 600; }

/* ============ 作品 ============ */
.section-heading { margin-bottom: 16px; }
.section-heading h2 { margin-bottom: 7px; }
.section-heading p { margin: 0; color: var(--ink-soft); font-size: 14px; }

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.project-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 12.5px;
}

.project-meta span:first-child { color: var(--blue-deep); font-weight: 600; }
.project-card h3 { margin: 10px 0 7px; font-size: 18px; }
.project-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.project-tags span {
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--blue-bg);
  color: var(--blue-deep);
  font-size: 12px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  width: fit-content;
  margin-top: 14px;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.project-link:hover { text-decoration: underline; }
.project-link:focus-visible { outline: 3px solid rgba(47, 128, 199, 0.28); outline-offset: 3px; }

/* ============ 联系方式 ============ */
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px;
  border: 1px solid #cfe0ef;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fff 0%, #edf5fc 100%);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.contact-card h2 { margin-bottom: 8px; }
.contact-card p:last-child { margin: 0; color: var(--ink-soft); font-size: 14px; }
.contact-action { flex: 0 0 auto; gap: 8px; align-self: flex-start; }

/* ============ 动态 ============ */
.updates-layout {
  display: grid;
  gap: 16px;
}

.update-form,
.update-stream {
  min-width: 0;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.update-form-heading,
.update-stream-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.update-form h3,
.update-stream h3 { margin: 0; font-size: 17px; }
.update-form-heading p,
.update-stream-heading span {
  margin: 0;
  color: var(--ink-soft);
  font-size: 12.5px;
}

.update-form > label,
.update-form-row label {
  display: grid;
  gap: 6px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 600;
}

.update-form > label + label { margin-top: 14px; }

.update-form input,
.update-form textarea,
.update-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px 11px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  outline: none;
}

.update-form textarea { resize: vertical; line-height: 1.6; }
.update-form input:focus,
.update-form textarea:focus,
.update-form select:focus { border-color: var(--blue); }

.update-attachments { margin-top: 14px; }
.update-attachments input[type="file"] { padding: 8px; font-size: 13px; }
.update-attachments small { color: var(--ink-soft); font-size: 12px; font-weight: 400; }

.update-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.sync-targets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 16px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.sync-targets legend {
  padding: 0 4px;
  color: var(--ink-soft);
  font-size: 13px;
}

.sync-targets label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--ink);
  font-size: 14px;
}

.sync-targets input { accent-color: var(--blue-deep); }

.update-form button,
.update-delete {
  border: none;
  border-radius: 9px;
  font: inherit;
  cursor: pointer;
}

.update-form button {
  min-height: 44px;
  width: 100%;
  padding: 10px 16px;
  background: var(--blue-deep);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
}

.update-form button:hover { background: #0d345a; }
.form-feedback { min-height: 1.4em; margin: 9px 0 0; color: var(--blue-deep); font-size: 13px; }

.update-list { display: grid; gap: 10px; }

.update-card {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfdff;
}

.update-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 12.5px;
}

.update-meta .tag { color: var(--blue-deep); font-weight: 600; }
.update-card h4 { margin: 7px 0 4px; font-size: 16px; }
.update-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }

.attachment-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.attachment-image {
  display: block;
  width: 88px;
  height: 66px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--blue-bg);
}

.attachment-image img { width: 100%; height: 100%; object-fit: cover; }

.attachment-file {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  max-width: 100%;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 600;
  overflow-wrap: anywhere;
  text-decoration: none;
}

.attachment-file:hover { border-color: var(--blue); background: var(--blue-bg); }

.update-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.sync-label { color: var(--ink-soft); font-size: 12.5px; }

.update-delete {
  min-height: 32px;
  padding: 5px 8px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12.5px;
}

.update-delete:hover { background: var(--blue-bg); color: var(--blue-deep); }
.update-empty { margin: 0; color: var(--ink-soft); font-size: 14px; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.info-list { margin: 0; }

.info-list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
}

.info-list div:last-child { border-bottom: none; }
.info-list dt { flex: 0 0 auto; color: var(--ink-soft); }
.info-list dd {
  min-width: 0;
  margin: 0;
  font-weight: 600;
  text-align: right;
  overflow-wrap: anywhere;
}

.plain-list { margin: 0; padding-left: 18px; }
.plain-list li { margin-bottom: 6px; }
.plain-list li:last-child { margin-bottom: 0; }

.course-group { margin-top: 14px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tags span {
  background: var(--green-bg);
  color: var(--green-deep);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 999px;
}

.tags.blue span {
  background: var(--blue-bg);
  color: var(--blue-deep);
}

/* ============ 学习记录 ============ */
.tabs { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }

.tab {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  font: inherit;
  min-height: 44px;
  font-size: 14px;
  padding: 8px 15px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}

.tab:hover { border-color: var(--green); color: var(--green-deep); }

.tab.is-active {
  background: var(--blue-deep);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.panel-intro {
  margin: 0 0 14px;
  color: var(--ink-soft);
  font-size: 14px;
}

.record-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.record-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 15px;
  box-shadow: none;
}

.record-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12.5px;
  color: var(--ink-soft);
}

.record-meta .tag {
  background: var(--blue-bg);
  color: var(--blue-deep);
  padding: 2px 9px;
  border-radius: 999px;
}

.record-card h4 { margin: 0 0 6px; font-size: 16px; color: var(--ink); }
.record-card p { margin: 0; font-size: 14px; color: var(--ink-soft); }

.record-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 10px;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.record-link:hover { text-decoration: underline; }
.record-link:focus-visible { outline: 3px solid rgba(47, 128, 199, 0.28); outline-offset: 3px; }

.hint { margin: 14px 0 0; font-size: 13px; color: var(--ink-soft); text-align: center; }

/* ============ 聊天 ============ */
.chat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: none;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.chat-header img { width: 42px; height: 42px; border-radius: 12px; }
.chat-header strong { display: block; font-size: 15px; }
.chat-header .online { font-size: 12.5px; color: var(--ink-soft); }

.online i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  margin-right: 5px;
  animation: pulse 1.8s ease-in-out infinite;
}

.online.fallback i { background: #e2a84a; }
.online.connected i { background: var(--green); }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(31, 95, 158, 0.42); }
  50% { box-shadow: 0 0 0 5px rgba(31, 95, 158, 0); }
}

.chat-body {
  height: min(52vh, 340px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  background: #f8fafc;
}

.msg {
  max-width: 92%;
  padding: 10px 12px;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.65;
  white-space: pre-line;
  word-break: break-word;
}

.msg.bot {
  align-self: flex-start;
  background: var(--card);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}

.msg.user {
  align-self: flex-end;
  background: var(--blue-deep);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.typing { display: flex; gap: 5px; padding: 14px 16px; }

.msg.typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: bounce 1.2s infinite;
}

.msg.typing span:nth-child(2) { animation-delay: 0.15s; }
.msg.typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-5px); opacity: 1; }
}

.chat-suggest {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

.chat-suggest > span { font-size: 13px; color: var(--ink-soft); margin-right: 2px; }

.chat-suggest button {
  border: none;
  background: var(--blue-bg);
  color: var(--blue-deep);
  font: inherit;
  min-height: 40px;
  font-size: 13px;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
}

.chat-suggest button:hover { background: #dfeefa; transform: translateY(-1px); }

.chat-form {
  display: flex;
  gap: 8px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
}

.chat-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  min-height: 44px;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s;
}

.chat-form input:focus { border-color: var(--blue); }

.chat-form button {
  border: none;
  background: var(--blue-deep);
  color: #fff;
  font: inherit;
  min-height: 44px;
  font-size: 15px;
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s;
}

.chat-form button:hover { background: #0d345a; }
.chat-form button:disabled,
.chat-form input:disabled { cursor: wait; opacity: 0.65; }

/* ============ 页脚 ============ */
footer {
  padding: 32px 16px 40px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
}

/* ============ 大屏渐进增强 ============ */
@media (min-width: 641px) {
  .site-header { padding: 12px 24px; }
  .brand-avatar { width: 30px; height: 30px; border-radius: 9px; }
  .site-nav { gap: 12px; }
  .site-nav a { padding: 8px 6px; font-size: 14.5px; }

  .hero { padding: 72px 20px 54px; }
  .hero-avatar { width: 116px; height: 116px; margin-bottom: 24px; border-radius: 50%; }
  .hero h1 { margin-bottom: 12px; font-size: 46px; letter-spacing: -1px; }
  .tagline { font-size: 17px; }
  .chips { margin-top: 28px; gap: 8px; }
  .chips li { font-size: 13px; padding: 6px 14px; }
  .hero-actions { margin-top: 30px; }

  .section { padding: 32px 20px 8px; }
  .section h2 { margin-bottom: 18px; font-size: 24px; }
  .card { padding: 20px; }
  .project-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .contact-card { flex-direction: row; align-items: center; justify-content: space-between; padding: 24px; }
  .contact-card > div { max-width: 610px; }
  .updates-layout { grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.15fr); gap: 18px; }
  .update-form, .update-stream { padding: 20px; }
  .grid-2 { grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
  .record-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .chat-body { height: 360px; }
  .msg { max-width: 80%; padding: 10px 14px; font-size: 14.5px; }
  .chat-header, .chat-suggest { padding-inline: 18px; }
  .chat-form { padding: 12px 18px 18px; }
  .chat-form input { font-size: 14.5px; padding-inline: 14px; }
  .chat-form button { padding-inline: 20px; font-size: 14.5px; }
}

@media (min-width: 900px) {
  .site-nav { gap: 18px; }
  .hero { padding-top: 80px; }
  .hero-avatar { width: 124px; height: 124px; }
  .hero h1 { font-size: 52px; }
  .record-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .project-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
}

@media (max-width: 360px) {
  .brand { gap: 7px; font-size: 16px; }
  .brand-avatar { display: block; width: 24px; height: 24px; }
  .avatar-status-trigger { left: 17px; top: 19px; width: 17px; height: 17px; font-size: 9px; }
  .site-nav a { padding-inline: 5px; font-size: 13px; }
  .hero { padding-top: 42px; }
}

@media (max-width: 640px) {
  html { scroll-behavior: auto; }
  .online i, .msg.typing span { animation: none; }
}

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