:root {
  --bg: #f5f7f4;
  --surface: #ffffff;
  --surface-soft: #eef3ef;
  --ink: #182322;
  --muted: #72807d;
  --line: #dbe3df;
  --accent: #167c80;
  --accent-dark: #0f5d61;
  --accent-soft: #e1f0ed;
  --danger: #b74b45;
  --danger-soft: #f9e9e6;
  --shadow: 0 18px 45px rgba(35, 59, 54, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-synthesis: none;
}

* { box-sizing: border-box; }

body { margin: 0; min-width: 320px; background: var(--bg); }

button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
input, textarea { color: var(--ink); }
input::placeholder, textarea::placeholder { color: #9aa6a2; }

[hidden] { display: none !important; }
.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; }
.muted { color: var(--muted); }
.eyebrow { margin: 0; color: var(--accent); font-size: 0.69rem; font-weight: 700; letter-spacing: 0.16em; }

.brand-mark { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--accent); color: #fff; font-family: Georgia, serif; font-size: 1.45rem; box-shadow: 0 8px 18px rgba(22, 124, 128, 0.2); }
.brand-mark.small { width: 34px; height: 34px; border-radius: 10px; font-size: 1rem; box-shadow: none; }

.auth-view { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 440px); align-items: center; gap: clamp(48px, 10vw, 150px); width: min(1120px, calc(100% - 48px)); min-height: 100vh; margin: 0 auto; padding: 48px 0; }
.auth-intro { max-width: 570px; }
.auth-intro .brand-mark { margin-bottom: 48px; }
.auth-intro h1 { max-width: 520px; margin: 16px 0 20px; font-size: clamp(2.4rem, 5vw, 4.4rem); line-height: 1.07; letter-spacing: -0.04em; font-weight: 650; }
.auth-description { max-width: 390px; margin: 0; color: var(--muted); font-size: 1.05rem; line-height: 1.8; }
.auth-card { padding: 38px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); }
.card-topline { display: flex; align-items: center; gap: 8px; margin-bottom: 36px; color: var(--muted); font-size: 0.78rem; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #4b9a70; box-shadow: 0 0 0 4px #e2f1e8; }
.auth-card h2 { margin: 0 0 10px; font-size: 1.6rem; letter-spacing: -0.02em; }
.auth-card > .muted { margin: 0 0 30px; font-size: 0.9rem; line-height: 1.6; }

label { display: block; margin-bottom: 8px; color: #50605d; font-size: 0.8rem; font-weight: 650; }
label span { color: var(--accent); }
input, textarea { width: 100%; border: 1px solid var(--line); border-radius: 6px; outline: none; background: #fcfdfc; transition: border-color .18s, box-shadow .18s, background .18s; }
input { height: 46px; padding: 0 13px; }
textarea { min-height: 92px; padding: 12px 13px; resize: vertical; line-height: 1.5; }
input:focus, textarea:focus { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 3px rgba(22, 124, 128, .13); }
.code-row { display: grid; grid-template-columns: 1fr 128px; gap: 10px; align-items: end; margin-top: 20px; }
.code-field input { letter-spacing: .22em; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 42px; border: 1px solid transparent; border-radius: 6px; padding: 0 16px; font-weight: 650; font-size: .85rem; transition: background .18s, border-color .18s, color .18s, transform .18s; }
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button-primary { background: var(--accent); color: white; }
.button-primary:hover:not(:disabled) { background: var(--accent-dark); }
.button-secondary { border-color: var(--line); background: var(--surface); color: var(--ink); }
.button-secondary:hover:not(:disabled) { border-color: #b9cbc5; background: var(--surface-soft); }
.button-danger { background: var(--danger); color: white; }
.button-danger:hover:not(:disabled) { background: #993e3a; }
.button-block { width: 100%; margin-top: 24px; }
.code-button { height: 46px; padding: 0 8px; white-space: nowrap; }
.form-message { min-height: 21px; margin: 12px 0 0; color: var(--muted); font-size: .78rem; line-height: 1.5; }
.form-message.success { color: #317451; }
.form-message.error { color: var(--danger); }
.security-note { display: flex; gap: 8px; align-items: center; margin: 30px 0 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .72rem; }
.security-note span { color: var(--accent); font-size: 1rem; }

.dashboard-view { display: flex; min-height: 100vh; }
.sidebar { position: sticky; top: 0; display: flex; flex: 0 0 238px; flex-direction: column; height: 100vh; padding: 28px 18px 20px; border-right: 1px solid var(--line); background: #f8faf8; }
.sidebar-brand { display: flex; align-items: center; gap: 11px; padding: 0 10px; }
.sidebar-brand strong { display: block; font-size: .98rem; }
.sidebar-brand span { display: block; margin-top: 2px; color: var(--muted); font-size: .68rem; }
.sidebar-section-label { margin: 54px 11px 12px; color: #899692; font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.category-list { display: grid; gap: 4px; }
.category-button { display: grid; grid-template-columns: 21px 1fr auto; align-items: center; gap: 7px; min-height: 40px; border: 0; border-radius: 6px; padding: 0 11px; background: transparent; color: #63716e; text-align: left; font-size: .82rem; }
.category-button:hover { background: var(--surface-soft); color: var(--ink); }
.category-button.selected { background: var(--accent-soft); color: var(--accent-dark); font-weight: 650; }
.category-button strong { color: #93a09d; font-size: .7rem; font-weight: 600; }
.category-button.selected strong { color: var(--accent); }
.category-icon { color: #a3afab; font-size: .88rem; }
.selected .category-icon { color: var(--accent); }
.sidebar-footer { margin-top: auto; padding: 12px 11px 0; border-top: 1px solid var(--line); }
.sidebar-caption { display: block; color: #98a39f; font-size: .68rem; line-height: 1.55; }

.main-content { min-width: 0; flex: 1; }
.topbar { display: flex; align-items: center; justify-content: space-between; min-height: 82px; padding: 0 clamp(24px, 4vw, 58px); border-bottom: 1px solid var(--line); background: rgba(245, 247, 244, .86); }
.mobile-brand { display: none; align-items: center; gap: 9px; }
.topbar-actions { display: flex; align-items: center; justify-content: flex-end; gap: 12px; width: 100%; }
.search-box { display: flex; align-items: center; gap: 8px; width: min(340px, 34vw); height: 42px; margin: 0; border: 1px solid var(--line); border-radius: 6px; padding: 0 10px; background: var(--surface); color: var(--muted); }
.search-box input { height: 100%; border: 0; padding: 0; background: transparent; box-shadow: none; font-size: .8rem; }
.search-icon { font-size: 1.25rem; line-height: 1; transform: rotate(-15deg); }
kbd { display: inline-grid; place-items: center; width: 22px; height: 21px; border: 1px solid var(--line); border-radius: 4px; color: #9da7a4; font-size: .68rem; }
.add-button { min-height: 42px; }
.icon-button { display: inline-grid; place-items: center; width: 38px; height: 38px; border: 1px solid transparent; border-radius: 6px; background: transparent; color: var(--muted); font-size: 1.1rem; }
.icon-button:hover { border-color: var(--line); background: var(--surface); color: var(--ink); }
.content-wrap { width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 56px 0 80px; }
.page-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.page-heading h1 { margin: 9px 0 8px; font-size: clamp(1.8rem, 3vw, 2.5rem); letter-spacing: -.04em; }
.page-heading .muted { margin: 0; font-size: .82rem; }
.user-chip { max-width: 240px; overflow: hidden; color: var(--muted); font-size: .75rem; text-overflow: ellipsis; white-space: nowrap; }
.bookmark-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.bookmark-card { min-width: 0; min-height: 258px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); transition: border-color .18s, box-shadow .18s, transform .18s; }
.bookmark-card:hover { border-color: #b9cbc5; box-shadow: 0 12px 28px rgba(35, 59, 54, .07); transform: translateY(-2px); }
.bookmark-card-top { display: flex; align-items: flex-start; justify-content: space-between; padding: 18px 18px 0; }
.site-avatar { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; background: var(--accent-soft); color: var(--accent-dark); font-size: .76rem; font-weight: 750; letter-spacing: .04em; }
.card-actions { display: flex; gap: 2px; opacity: 0; transition: opacity .18s; }
.bookmark-card:hover .card-actions, .card-actions:focus-within { opacity: 1; }
.card-action { display: inline-grid; place-items: center; width: 28px; height: 28px; border: 0; border-radius: 5px; background: transparent; color: #94a09d; font-size: .95rem; }
.card-action:hover { background: var(--surface-soft); color: var(--ink); }
.card-action.danger:hover { background: var(--danger-soft); color: var(--danger); }
.bookmark-content { display: flex; flex-direction: column; min-height: 198px; padding: 17px 18px 18px; }
.bookmark-category { color: var(--accent); font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.bookmark-card h2 { overflow: hidden; margin: 7px 0 4px; font-size: 1.04rem; text-overflow: ellipsis; white-space: nowrap; }
.bookmark-domain { overflow: hidden; margin: 0; color: #9aa6a2; font-size: .73rem; text-overflow: ellipsis; white-space: nowrap; }
.bookmark-description { display: -webkit-box; overflow: hidden; margin: 14px 0 18px; color: var(--muted); font-size: .78rem; line-height: 1.55; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.bookmark-footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: auto; }
.tag-list { display: flex; flex-wrap: wrap; gap: 5px; min-width: 0; }
.tag-list span { max-width: 92px; overflow: hidden; border-radius: 4px; padding: 4px 6px; background: var(--surface-soft); color: #73807d; font-size: .64rem; text-overflow: ellipsis; white-space: nowrap; }
.open-link { flex: 0 0 auto; color: var(--accent-dark); font-size: .74rem; font-weight: 700; text-decoration: none; }
.open-link:hover { color: var(--accent); text-decoration: underline; }
.empty-state { grid-column: 1 / -1; display: grid; justify-items: center; padding: 90px 20px; border: 1px dashed #c8d6d0; border-radius: 8px; text-align: center; }
.empty-icon { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 18px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 1.6rem; }
.empty-state h2 { margin: 0 0 8px; font-size: 1.08rem; }
.empty-state p { margin: 0 0 22px; color: var(--muted); font-size: .8rem; }
.error-state { border-color: #e4bfba; }

.modal-dialog { width: min(560px, calc(100% - 32px)); border: 0; border-radius: 10px; padding: 0; background: transparent; box-shadow: 0 22px 70px rgba(21, 39, 36, .2); }
.modal-dialog::backdrop { background: rgba(21, 39, 36, .36); backdrop-filter: blur(3px); }
.modal-card { padding: 30px; background: var(--surface); }
.modal-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 28px; }
.modal-heading h2, .confirm-dialog h2 { margin: 8px 0 0; font-size: 1.35rem; letter-spacing: -.02em; }
.close-dialog { margin-top: -7px; font-size: 1.5rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 17px 14px; }
.field.full-span { grid-column: 1 / -1; }
.field label { margin-bottom: 7px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 9px; margin-top: 22px; }
.confirm-dialog { max-width: 410px; }
.confirm-dialog .modal-card { padding: 34px; }
.danger-icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--danger-soft); color: var(--danger); font-weight: 800; }
.confirm-dialog h2 { margin-top: 19px; }
.confirm-dialog .muted { margin: 12px 0 0; font-size: .84rem; line-height: 1.6; }
.confirm-hint { margin: 9px 0 0; color: #a08d83; font-size: .73rem; }
.toast-region { position: fixed; right: 24px; bottom: 24px; z-index: 10; }
.toast { display: flex; align-items: center; gap: 18px; min-height: 45px; border: 1px solid #c8ded7; border-radius: 6px; padding: 0 14px 0 16px; background: #f7fcf9; box-shadow: 0 12px 30px rgba(35, 59, 54, .12); color: #3c5f55; font-size: .8rem; }
.toast.error { border-color: #e4bfba; background: #fff8f7; color: var(--danger); }
.toast button { border: 0; border-bottom: 1px solid currentColor; padding: 0 0 2px; background: transparent; color: var(--accent-dark); font-size: .78rem; font-weight: 700; }

@media (max-width: 860px) {
  .auth-view { grid-template-columns: 1fr; gap: 34px; width: min(520px, calc(100% - 40px)); }
  .auth-intro .brand-mark { margin-bottom: 30px; }
  .auth-intro h1 { max-width: 500px; font-size: clamp(2.2rem, 8vw, 3.3rem); }
  .sidebar { flex-basis: 195px; }
  .topbar { padding: 0 24px; }
  .content-wrap { width: min(100% - 40px, 680px); padding-top: 42px; }
  .bookmark-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .search-box { width: min(300px, 40vw); }
}

@media (max-width: 620px) {
  .auth-view { width: min(100% - 32px, 450px); padding: 30px 0; }
  .auth-intro .brand-mark { margin-bottom: 25px; }
  .auth-intro h1 { margin-top: 13px; font-size: 2.35rem; }
  .auth-description { font-size: .9rem; }
  .auth-card { padding: 25px 21px; }
  .dashboard-view { display: block; }
  .sidebar { position: static; display: block; width: 100%; height: auto; padding: 17px 16px 12px; border-right: 0; border-bottom: 1px solid var(--line); }
  .sidebar-brand { display: none; }
  .sidebar-section-label { display: none; }
  .category-list { display: flex; overflow-x: auto; gap: 6px; padding-bottom: 3px; scrollbar-width: none; }
  .category-list::-webkit-scrollbar { display: none; }
  .category-button { flex: 0 0 auto; grid-template-columns: 17px auto auto; min-height: 34px; padding: 0 10px; font-size: .74rem; }
  .sidebar-footer { display: none; }
  .topbar { min-height: 70px; padding: 0 16px; }
  .mobile-brand { display: flex; }
  .topbar-actions { width: auto; gap: 7px; }
  .search-box { width: min(180px, 43vw); height: 38px; }
  .search-box kbd { display: none; }
  .add-button { width: 38px; min-height: 38px; padding: 0; font-size: 0; }
  .add-button span { font-size: 1.15rem; }
  .icon-button { width: 34px; height: 34px; }
  .content-wrap { width: calc(100% - 32px); padding: 34px 0 55px; }
  .page-heading { align-items: flex-start; margin-bottom: 24px; }
  .page-heading h1 { font-size: 1.8rem; }
  .user-chip { display: none; }
  .bookmark-grid { grid-template-columns: 1fr; gap: 12px; }
  .bookmark-card { min-height: 236px; }
  .card-actions { opacity: 1; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full-span { grid-column: auto; }
  .modal-card { padding: 25px 20px; }
  .toast-region { right: 16px; bottom: 16px; left: 16px; }
  .toast { justify-content: space-between; }
}