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

:root {
  --bg:          #f5eddf;
  --bg-elevated: rgba(255,251,244,.88);
  --bg-card:     rgba(255,252,246,.78);
  --bg-card-hover: rgba(255,255,255,.9);
  --sidebar-bg:  rgba(255,250,241,.7);
  --accent:      #078fc8;
  --accent-2:    #003b6f;
  --accent-light:#18aee4;
  --gradient:    linear-gradient(135deg, #003b6f 0%, #18aee4 100%);
  --gradient-soft: linear-gradient(135deg, rgba(24,174,228,.16) 0%, rgba(176,127,65,.08) 100%);
  --button-soft: linear-gradient(105deg, rgba(255,206,211,.92) 0%, rgba(255,247,232,.9) 45%, rgba(201,235,255,.96) 100%);
  --button-soft-hover: linear-gradient(105deg, rgba(255,191,199,.98) 0%, rgba(255,249,239,.96) 42%, rgba(184,228,255,1) 100%);
  --button-shadow: 0 11px 24px rgba(77,55,29,.16), inset 0 1px 1px rgba(255,255,255,.82), inset 0 -1px 1px rgba(64,86,106,.12);
  --button-shadow-hover: 0 15px 30px rgba(77,55,29,.2), inset 0 1px 1px rgba(255,255,255,.9), inset 0 -1px 1px rgba(64,86,106,.14);
  --text:        #233246;
  --text-muted:  #857463;
  --text-dim:    #5d6874;
  --border:      rgba(80,58,35,.13);
  --border-accent: rgba(7,143,200,.32);
  --shadow:      0 24px 70px rgba(77,55,29,.18);
  --shadow-sm:   0 10px 30px rgba(77,55,29,.12);
  --radius:      16px;
  --radius-sm:   10px;
  --radius-xs:   6px;
  --sidebar-w:   240px;
}

html, body { height: 100%; }
body {
  font-family: Avenir Next, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background:
    linear-gradient(115deg, rgba(255,251,244,.78), rgba(239,222,198,.3)),
    url('assets/silk-background.png') center / cover fixed no-repeat,
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 15%, rgba(255,255,255,.58), transparent 26%),
    radial-gradient(circle at 82% 78%, rgba(0,59,111,.1), transparent 32%);
  z-index: -1;
}

.hidden { display: none !important; }

/* ── Auth Page ─────────────────────────────────────────────────────────────── */
.page-auth {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: transparent;
}

.auth-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.auth-glow-1 {
  width: 500px; height: 500px;
  background: rgba(255,255,255,.45);
  top: -150px; left: -150px;
}
.auth-glow-2 {
  width: 400px; height: 400px;
  background: rgba(24,174,228,.16);
  bottom: -120px; right: -80px;
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  margin: 20px;
  padding: 42px 36px 38px;
  background: rgba(255,250,242,.74);
  border: 1px solid var(--border-accent);
  border-radius: 24px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.72);
}

/* ── Logo ──────────────────────────────────────────────────────────────────── */
.auth-logo, .sidebar-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-logo {
  margin-bottom: 28px;
}

.brand-logo-img {
  display: block;
  width: min(260px, 100%);
  height: auto;
  filter: drop-shadow(0 12px 22px rgba(0,59,111,.12));
}

/* ── Auth Tabs ─────────────────────────────────────────────────────────────── */
.auth-tabs {
  display: flex;
  background: rgba(255,255,255,.32);
  border: 1px solid rgba(255,255,255,.58);
  border-radius: 999px;
  padding: 5px;
  margin-bottom: 24px;
  box-shadow: inset 0 1px 2px rgba(255,255,255,.7), inset 0 -1px 2px rgba(80,58,35,.08);
}

.auth-tab {
  flex: 1;
  padding: 10px 14px;
  background: none;
  border: none;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
}

.auth-tab.active {
  background: var(--button-soft);
  color: #3f3d42;
  box-shadow: var(--button-shadow);
}

/* ── Form Fields ───────────────────────────────────────────────────────────── */
.field {
  position: relative;
  margin-bottom: 14px;
}

.field-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 17px; height: 17px;
  color: var(--text-muted);
  pointer-events: none;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background: rgba(255,255,255,.62);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .92rem;
  outline: none;
  transition: border-color .2s, background .2s;
}

input[type="text"]::placeholder,
input[type="password"]::placeholder { color: var(--text-muted); }

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--accent-light);
  background: rgba(255,255,255,.88);
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
button { cursor: pointer; font-family: inherit; }

.auth-tab,
.btn-gradient,
.nav-item,
.btn-upload-sidebar,
.btn-logout,
.btn-card,
.btn-like,
.btn-comment-toggle,
.btn-comment-like,
.btn-reply-toggle,
.btn-expand-replies,
.btn-delete-comment,
.btn-send,
.btn-edit-desc,
.btn-cancel-desc,
.btn-back,
.btn-icon-close {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.auth-tab::before,
.btn-gradient::before,
.nav-item::before,
.btn-upload-sidebar::before,
.btn-logout::before,
.btn-card::before,
.btn-like::before,
.btn-comment-toggle::before,
.btn-comment-like::before,
.btn-reply-toggle::before,
.btn-expand-replies::before,
.btn-delete-comment::before,
.btn-send::before,
.btn-edit-desc::before,
.btn-cancel-desc::before,
.btn-back::before,
.btn-icon-close::before {
  content: '';
  position: absolute;
  inset: 1px 1px auto 1px;
  height: 46%;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255,255,255,.72), rgba(255,255,255,0));
  opacity: .72;
  pointer-events: none;
  z-index: -1;
}

.auth-tab:hover,
.btn-gradient:hover,
.nav-item:hover,
.btn-upload-sidebar:hover,
.btn-card:hover,
.btn-like:hover,
.btn-comment-toggle:hover,
.btn-comment-like:hover,
.btn-reply-toggle:hover,
.btn-expand-replies:hover,
.btn-send:hover,
.btn-edit-desc:hover,
.btn-cancel-desc:hover,
.btn-back:hover,
.btn-icon-close:hover {
  transform: translateY(-1px);
}

.auth-tab:active,
.btn-gradient:active,
.nav-item:active,
.btn-upload-sidebar:active,
.btn-card:active,
.btn-like:active,
.btn-comment-toggle:active,
.btn-comment-like:active,
.btn-reply-toggle:active,
.btn-expand-replies:active,
.btn-send:active,
.btn-edit-desc:active,
.btn-cancel-desc:active,
.btn-back:active,
.btn-icon-close:active {
  transform: translateY(0);
}

.btn-gradient {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--button-soft);
  color: #4f4b4f;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 999px;
  font-size: .92rem;
  font-weight: 600;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: var(--button-shadow);
}
.btn-gradient:hover { background: var(--button-soft-hover); color: #323238; box-shadow: var(--button-shadow-hover); }
.btn-gradient:active { transform: translateY(0); }
.btn-gradient svg { width: 16px; height: 16px; }

.btn-full { width: 100%; margin-top: 4px; }

/* ── Error ─────────────────────────────────────────────────────────────────── */
.error-msg {
  color: #f87171;
  font-size: .82rem;
  margin-top: 10px;
  min-height: 1.2em;
  text-align: center;
}

/* ── App Shell ─────────────────────────────────────────────────────────────── */
.page-app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ───────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  gap: 8px;
  backdrop-filter: blur(22px);
  box-shadow: inset -1px 0 0 rgba(255,255,255,.45);
  transition: width .3s ease, padding .3s ease, opacity .3s ease, border .3s ease;
  overflow: hidden;
  position: relative;
}

.sidebar.collapsed {
  width: 0;
  padding: 24px 0;
  border-right-color: transparent;
  opacity: 0;
  pointer-events: none;
}

/* ── Sidebar Collapse / Expand Buttons ─────────────────────────────────────── */
.btn-collapse-sidebar {
  position: absolute;
  top: 14px;
  right: 10px;
  width: 28px; height: 28px;
  background: rgba(255,255,255,.52);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .2s;
  z-index: 2;
  flex-shrink: 0;
}
.btn-collapse-sidebar svg { width: 14px; height: 14px; }
.btn-collapse-sidebar:hover { background: rgba(24,174,228,.12); color: var(--accent-light); border-color: rgba(7,143,200,.3); }

.btn-expand-sidebar {
  position: absolute;
  top: 14px;
  left: 12px;
  width: 32px; height: 32px;
  background: rgba(255,255,255,.62);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .2s;
  z-index: 10;
  box-shadow: 0 4px 14px rgba(77,55,29,.12);
}
.btn-expand-sidebar svg { width: 15px; height: 15px; }
.btn-expand-sidebar:hover { background: rgba(255,255,255,.88); color: var(--accent-light); box-shadow: 0 6px 18px rgba(77,55,29,.18); }
.btn-expand-sidebar.hidden { display: none; }

.sidebar-logo {
  padding: 4px 8px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.sidebar-logo .brand-logo-img {
  width: 170px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 14px;
  background: rgba(255,255,255,.34);
  border: 1px solid rgba(255,255,255,.48);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  text-align: left;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item:hover { background: var(--button-soft); color: var(--text); box-shadow: var(--button-shadow); }
.nav-item.active {
  background: var(--button-soft);
  color: #3f3d42;
  border: 1px solid rgba(255,255,255,.72);
  box-shadow: var(--button-shadow);
}

.btn-upload-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px;
  background: var(--button-soft);
  color: #424047;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 600;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: var(--button-shadow);
  margin-top: auto;
}
.btn-upload-sidebar svg { width: 16px; height: 16px; }
.btn-upload-sidebar:hover { background: var(--button-soft-hover); box-shadow: var(--button-shadow-hover); }

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.avatar {
  width: 32px; height: 32px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

#sidebar-username {
  font-size: .85rem;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  width: 32px; height: 32px;
  background: var(--button-soft);
  border: 1px solid rgba(255,255,255,.68);
  border-radius: 999px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 7px 16px rgba(77,55,29,.12), inset 0 1px 1px rgba(255,255,255,.8);
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
}
.btn-logout svg { width: 15px; height: 15px; }
.btn-logout:hover { background: linear-gradient(105deg, rgba(255,218,223,.96), rgba(255,246,233,.9), rgba(232,240,245,.92)); border-color: rgba(244,63,94,.22); color: #d94d67; }

/* ── Content Area ──────────────────────────────────────────────────────────── */
.content {
  flex: 1;
  overflow-y: auto;
  background: rgba(255,249,239,.28);
  backdrop-filter: blur(3px);
  position: relative;
}

.content-view { padding: 36px 40px; }

.view-header { margin-bottom: 28px; }
.view-title { font-size: 1.5rem; font-weight: 700; color: var(--text); }
.view-sub { font-size: .85rem; color: var(--text-muted); margin-top: 4px; }

/* ── Notes Grid ────────────────────────────────────────────────────────────── */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* ── Note Card ─────────────────────────────────────────────────────────────── */
.note-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all .25s;
  position: relative;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,.62);
}
.note-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.note-card.type-pdf::before  { background: linear-gradient(90deg, #ef4444, #f97316); }
.note-card.type-docx::before { background: linear-gradient(90deg, #3b82f6, #8b5cf6); }
.note-card.type-md::before   { background: linear-gradient(90deg, #10b981, #3b82f6); }

.note-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(77,55,29,.16);
}

.note-card-top {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.note-type-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .5px;
  flex-shrink: 0;
}
.type-pdf  .note-type-icon { background: rgba(239,68,68,.15);  color: #f87171; }
.type-docx .note-type-icon { background: rgba(7,143,200,.13); color: var(--accent); }
.type-md   .note-type-icon { background: rgba(16,185,129,.13); color: #119968; }

.note-info { flex: 1; min-width: 0; }
.note-title { font-weight: 600; font-size: .95rem; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.note-title-editable { cursor: pointer; }
.note-title-editable:hover .note-title-edit-hint { opacity: 1; }
.note-title-edit-hint {
  opacity: 0;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  transition: opacity .2s;
}
.note-title-edit-hint:hover { color: var(--accent-light); }
.note-title-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.note-title-input {
  flex: 1;
  padding: 3px 6px;
  background: rgba(255,255,255,.78);
  border: 1px solid var(--accent-light);
  border-radius: 4px;
  color: var(--text);
  font-size: .92rem;
  font-weight: 600;
  font-family: inherit;
  outline: none;
}
.note-meta { font-size: .78rem; color: var(--text-muted); margin-top: 3px; }
.note-author { color: var(--accent-light); font-weight: 500; }

.note-visibility {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .72rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}
.note-visibility.public  { background: rgba(16,185,129,.12); color: #34d399; }
.note-visibility.private { background: rgba(107,107,141,.12); color: var(--text-muted); }

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

.btn-card {
  flex: 1;
  min-width: 0;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,.66);
  transition: transform .18s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  white-space: nowrap;
  box-shadow: 0 8px 18px rgba(77,55,29,.1), inset 0 1px 1px rgba(255,255,255,.78);
}
.btn-preview {
  background: var(--button-soft);
  color: #3f3d42;
}
.btn-preview:hover { background: var(--button-soft-hover); border-color: rgba(255,255,255,.78); box-shadow: var(--button-shadow); }

.btn-toggle {
  background: linear-gradient(105deg, rgba(255,255,255,.78), rgba(240,249,255,.78));
  border-color: rgba(255,255,255,.66);
  color: var(--text-muted);
}
.btn-toggle:hover { background: var(--button-soft); color: var(--text); box-shadow: var(--button-shadow); }
.btn-toggle.is-public {
  background: linear-gradient(105deg, rgba(213,255,236,.9), rgba(246,255,248,.86), rgba(207,241,255,.9));
  border-color: rgba(16,185,129,.22);
  color: #138661;
}
.btn-toggle.is-public:hover { background: linear-gradient(105deg, rgba(193,250,223,.96), rgba(250,255,250,.92), rgba(190,234,255,.96)); }

.btn-delete {
  background: linear-gradient(105deg, rgba(255,221,226,.92), rgba(255,248,238,.88), rgba(239,247,252,.86));
  border-color: rgba(244,63,94,.18);
  color: #d94d67;
  flex: 0 0 auto;
}
.btn-delete:hover { background: linear-gradient(105deg, rgba(255,205,213,.98), rgba(255,245,235,.94), rgba(235,244,250,.92)); border-color: rgba(244,63,94,.3); }

/* ── Note Footer (like + comment) ─────────────────────────────────────────── */
.note-footer {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.btn-like {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px 6px 9px;
  background: linear-gradient(105deg, rgba(255,255,255,.75), rgba(240,249,255,.74));
  border: 1px solid rgba(255,255,255,.64);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .82rem;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  box-shadow: 0 7px 16px rgba(77,55,29,.1), inset 0 1px 1px rgba(255,255,255,.76);
}
.btn-like .icon-soft-heart {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  fill: #e8576b;
  filter: drop-shadow(0 2px 4px rgba(232,87,107,.22));
  transition: transform .22s, filter .22s;
}
.btn-like:hover .icon-soft-heart { transform: scale(1.1); filter: drop-shadow(0 3px 6px rgba(232,87,107,.28)); }
.btn-like.liked .icon-soft-heart { filter: drop-shadow(0 2px 5px rgba(232,87,107,.26)); transform: scale(1.08); }
.btn-like:hover { background: linear-gradient(105deg, rgba(255,213,220,.95), rgba(255,248,240,.9), rgba(232,244,252,.9)); border-color: rgba(244,63,94,.25); color: #d94d67; }
.btn-like.liked { background: linear-gradient(105deg, rgba(255,199,209,.96), rgba(255,245,238,.9), rgba(224,242,252,.9)); border-color: rgba(244,63,94,.34); color: #d94d67; }

.btn-comment-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 13px;
  background: linear-gradient(105deg, rgba(255,255,255,.75), rgba(240,249,255,.74));
  border: 1px solid rgba(255,255,255,.64);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .82rem;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  box-shadow: 0 7px 16px rgba(77,55,29,.1), inset 0 1px 1px rgba(255,255,255,.76);
}
.btn-comment-toggle svg { width: 15px; height: 15px; }
.btn-comment-toggle:hover { background: var(--button-soft); border-color: rgba(255,255,255,.74); color: #3f3d42; }

/* ── Comment Section ───────────────────────────────────────────────────────── */
.comment-section {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comments-list {
  max-height: 320px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 2px;
}

.comments-loading, .no-comments {
  font-size: .82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 12px 0;
}

.comment-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  position: relative;
}

.comment-avatar {
  width: 28px; height: 28px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.comment-body { flex: 1; min-width: 0; }
.comment-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 3px; }
.comment-author { font-size: .8rem; font-weight: 600; color: var(--accent-light); }
.comment-date   { font-size: .75rem; color: var(--text-muted); }
.comment-text   { font-size: .85rem; color: var(--text-dim); line-height: 1.5; word-break: break-word; }

/* ── Comment Actions Row ───────────────────────────────────────────────────── */
.comment-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.btn-comment-like {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: linear-gradient(105deg, rgba(255,255,255,.64), rgba(241,249,255,.6));
  border: 1px solid rgba(255,255,255,.54);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: .78rem;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  box-shadow: 0 5px 12px rgba(77,55,29,.08), inset 0 1px 1px rgba(255,255,255,.72);
}
.btn-comment-like svg { width: 13px; height: 13px; }
.btn-comment-like:hover { color: #d94d67; border-color: rgba(244,63,94,.22); background: linear-gradient(105deg, rgba(255,218,225,.92), rgba(255,248,240,.86), rgba(236,246,252,.82)); }
.btn-comment-like.liked { color: #d94d67; background: linear-gradient(105deg, rgba(255,207,216,.9), rgba(255,247,239,.82), rgba(232,244,252,.8)); }

.btn-reply-toggle, .btn-expand-replies {
  padding: 4px 10px;
  background: linear-gradient(105deg, rgba(255,255,255,.6), rgba(240,249,255,.58));
  border: 1px solid rgba(255,255,255,.5);
  color: var(--text-muted);
  font-size: .78rem;
  border-radius: 999px;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 5px 12px rgba(77,55,29,.07), inset 0 1px 1px rgba(255,255,255,.7);
}
.btn-reply-toggle:hover { color: #3f3d42; background: var(--button-soft); }
.btn-expand-replies { color: var(--accent-light); }
.btn-expand-replies:hover { background: var(--button-soft); color: #3f3d42; }

.btn-delete-comment {
  background: linear-gradient(105deg, rgba(255,255,255,.62), rgba(255,244,244,.58));
  border: 1px solid rgba(255,255,255,.5);
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 999px;
  flex-shrink: 0;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  margin-left: auto;
}
.btn-delete-comment:hover { background: linear-gradient(105deg, rgba(255,219,225,.95), rgba(255,246,238,.86)); color: #d94d67; }

/* ── Replies ───────────────────────────────────────────────────────────────── */
.replies-list {
  margin-top: 8px;
  padding-left: 12px;
  border-left: 2px solid rgba(7,143,200,.2);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comment-item.is-reply .comment-avatar {
  width: 24px; height: 24px;
  font-size: .7rem;
}

.reply-input-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.comment-input-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.comment-input {
  flex: 1;
  padding: 9px 12px;
  background: rgba(255,255,255,.58);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text);
  font-size: .85rem;
  outline: none;
  transition: border-color .2s;
}
.comment-input::placeholder { color: var(--text-muted); }
.comment-input:focus { border-color: var(--accent-light); }

.btn-send {
  padding: 9px 16px;
  background: var(--button-soft);
  color: #424047;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 999px;
  font-size: .83rem;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: var(--button-shadow);
}
.btn-send:hover { background: var(--button-soft-hover); box-shadow: var(--button-shadow-hover); }

/* ── Note Description Block ─────────────────────────────────────────────── */
.note-desc-block {
  background: rgba(24,174,228,.08);
  border: 1px solid rgba(7,143,200,.18);
  border-radius: var(--radius-xs);
  padding: 10px 12px;
  flex-shrink: 0;
}

.note-desc-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.btn-edit-desc {
  margin-left: auto;
  background: linear-gradient(105deg, rgba(255,255,255,.64), rgba(240,249,255,.62));
  border: 1px solid rgba(255,255,255,.58);
  color: #4c6979;
  font-size: .72rem;
  padding: 2px 8px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  text-transform: none;
  letter-spacing: 0;
}
.btn-edit-desc:hover { background: var(--button-soft); color: #3f3d42; }

.note-desc-text {
  font-size: .83rem;
  color: var(--text-dim);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.desc-placeholder { color: var(--text-muted); font-style: italic; }

.desc-textarea {
  width: 100%;
  min-height: 72px;
  padding: 8px 10px;
  background: rgba(255,255,255,.62);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xs);
  color: var(--text);
  font-size: .83rem;
  font-family: inherit;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  transition: border-color .2s;
}
.desc-textarea::placeholder { color: var(--text-muted); }
.desc-textarea:focus { border-color: var(--accent-light); }

.desc-edit-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.btn-cancel-desc {
  padding: 9px 14px;
  background: linear-gradient(105deg, rgba(255,255,255,.72), rgba(243,249,253,.68));
  border: 1px solid rgba(255,255,255,.6);
  color: var(--text-muted);
  border-radius: 999px;
  font-size: .83rem;
  font-weight: 600;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 7px 16px rgba(77,55,29,.09), inset 0 1px 1px rgba(255,255,255,.75);
}
.btn-cancel-desc:hover { background: var(--button-soft); color: var(--text); }

/* ── Note Author Button ──────────────────────────────────────────────────── */
.note-author-btn {
  background: none;
  border: none;
  color: var(--accent-light);
  font-size: inherit;
  padding: 0;
  cursor: pointer;
  transition: opacity .2s;
}
.note-author-btn:hover { opacity: .75; text-decoration: underline; }

/* ── Profile Page ────────────────────────────────────────────────────────── */
.pf-page {
  max-width: 560px;
  margin: 0 auto;
  padding: 8px 0 40px;
}

.pf-back {
  margin-bottom: 24px;
}

.pf-hero {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 32px;
}

.pf-avatar-wrap {
  position: relative;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pf-avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.pf-avatar-letter {
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
  border-radius: 50%;
}

.pf-avatar-overlay {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .2s;
  cursor: pointer;
  color: #fff;
}
.pf-avatar-editable:hover .pf-avatar-overlay { opacity: 1; }

.pf-hero-info { flex: 1; min-width: 0; }

.pf-username-row { margin-bottom: 6px; }
.pf-username-input {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--border-accent);
  outline: none;
  width: 100%;
  padding: 2px 0;
  transition: border-color .2s;
}
.pf-username-input:focus { border-bottom-color: var(--accent-light); }

.pf-username-display {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}

.pf-join-date { font-size: .82rem; color: var(--text-muted); margin-top: 4px; }

.pf-fields {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,.62);
}

.pf-section-title {
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
}
.pf-section-hint { font-weight: 400; color: var(--text-muted); text-transform: none; letter-spacing: 0; margin-left: 6px; }

.pf-field-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pf-field-label {
  width: 52px;
  font-size: .82rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.pf-field-input {
  flex: 1;
  padding: 7px 10px;
  background: rgba(255,255,255,.58);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text);
  font-size: .85rem;
  outline: none;
  transition: border-color .2s;
}
.pf-field-input:focus { border-color: var(--accent-light); }

.pf-field-value {
  flex: 1;
  font-size: .85rem;
  color: var(--text-dim);
}

.pf-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  flex-shrink: 0;
}
.pf-toggle input { display: none; }
.pf-toggle-track {
  width: 34px; height: 18px;
  background: linear-gradient(105deg, rgba(255,255,255,.68), rgba(235,244,250,.62));
  border: 1px solid rgba(255,255,255,.62);
  border-radius: 9px;
  position: relative;
  transition: background .2s, box-shadow .2s;
  box-shadow: inset 0 1px 1px rgba(255,255,255,.72), 0 4px 10px rgba(77,55,29,.08);
}
.pf-toggle input:checked + .pf-toggle-track { background: var(--button-soft); }
.pf-toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 5px rgba(77,55,29,.16);
  transition: transform .2s;
}
.pf-toggle input:checked ~ .pf-toggle-track .pf-toggle-thumb,
.pf-toggle input:checked + .pf-toggle-track .pf-toggle-thumb { transform: translateX(16px); }
.pf-toggle-label { font-size: .75rem; color: var(--text-muted); width: 30px; }

.pf-empty { font-size: .85rem; color: var(--text-muted); text-align: center; padding: 8px 0; }

.pf-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
}
.pf-save-btn { padding: 11px 28px; }
.pf-save-msg { font-size: .85rem; }

/* ── Empty State ───────────────────────────────────────────────────────────── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
}
.empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: .4;
}
.empty-state p { color: var(--text-muted); font-size: .9rem; }

/* ── Preview ───────────────────────────────────────────────────────────────── */
.preview-view {
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 0 !important;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background: var(--button-soft);
  border: 1px solid rgba(255,255,255,.7);
  border-bottom-color: transparent;
  color: #424047;
  font-size: .88rem;
  border-radius: 999px;
  margin: 14px 16px 10px;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: var(--button-shadow);
  flex-shrink: 0;
}
.btn-back svg { width: 16px; height: 16px; }
.btn-back:hover { color: #323238; background: var(--button-soft-hover); box-shadow: var(--button-shadow-hover); }

#preview-frame {
  flex: 1;
  width: 100%;
  border: none;
  border-top: 1px solid var(--border);
}

/* ── Upload Modal ──────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(49,34,16,.32);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.65);
  backdrop-filter: blur(22px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }

.btn-icon-close {
  width: 30px; height: 30px;
  background: var(--button-soft);
  border: 1px solid rgba(255,255,255,.68);
  border-radius: 50%;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 7px 16px rgba(77,55,29,.12), inset 0 1px 1px rgba(255,255,255,.8);
}
.btn-icon-close svg { width: 14px; height: 14px; }
.btn-icon-close:hover { background: linear-gradient(105deg, rgba(255,218,224,.96), rgba(255,246,237,.9)); border-color: rgba(244,63,94,.22); color: #d94d67; }

/* ── Dropzone ──────────────────────────────────────────────────────────────── */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 16px;
  margin-bottom: 14px;
  background: rgba(24,174,228,.07);
  border: 1.5px dashed rgba(7,143,200,.28);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all .2s;
}
.dropzone:hover { background: rgba(24,174,228,.13); border-color: rgba(7,143,200,.48); }
.dropzone input[type="file"] { display: none; }

.dropzone-icon { width: 36px; height: 36px; color: var(--accent-light); opacity: .7; }
.dropzone-text { font-size: .9rem; color: var(--text-dim); font-weight: 500; }
.dropzone-hint { font-size: .78rem; color: var(--text-muted); }
.dropzone.has-file { border-style: solid; border-color: rgba(7,143,200,.48); background: rgba(24,174,228,.13); }
.dropzone.has-file .dropzone-text { color: var(--accent-light); }

/* ── Toggle ────────────────────────────────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  margin-bottom: 14px;
  cursor: pointer;
}
.toggle-label { font-size: .88rem; color: var(--text-dim); }

.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { display: none; }
.toggle-track {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(255,255,255,.68), rgba(235,244,250,.62));
  border: 1px solid rgba(255,255,255,.62);
  border-radius: 12px;
  transition: all .25s;
  box-shadow: inset 0 1px 1px rgba(255,255,255,.72), 0 4px 10px rgba(77,55,29,.08);
}
.toggle-thumb {
  position: absolute;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 2px; left: 2px;
  box-shadow: 0 2px 5px rgba(77,55,29,.16);
  transition: all .25s;
}
.toggle input:checked ~ .toggle-track {
  background: var(--button-soft);
  border-color: rgba(255,255,255,.78);
}
.toggle input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(20px);
  background: #fff;
}

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(80,58,35,.18); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(80,58,35,.28); }

/* ── 备案号 ────────────────────────────────────────────────────────────────── */
.beian-footer {
  position: fixed;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: rgba(93,73,52,.72);
  z-index: 1;
  pointer-events: auto;
}
.beian-footer a {
  color: inherit;
  text-decoration: none;
  opacity: .7;
}
.beian-footer a:hover { opacity: 1; }