/* mobile.css — phone-only UI for StudyBuddy.
 *
 * Loaded after styles.css. Token variables (--ink-*, --page-*, --hairline-*,
 * --accent, --brick, --moss, --slate, --amber, --r-*, --serif, --sans, --mono,
 * --note-paper) are already declared globally in styles.css — we reuse them.
 *
 * All classes are prefixed `sb-` so they don't collide with the desktop app's
 * .btn / .eyebrow / etc.
 *
 * Active only when MobileApp is mounted (narrow viewport or ?mobile=1).
 */

/* coral alias (used by results screen) — only var we add */
:root { --coral-500: #b0473d; }

/* ─── shell ──────────────────────────────────────────────────────────────── */

.sb-screen {
  /* Production: fill the viewport. The mockup hardcoded 375x812 to fit a
     fake iPhone bezel — production phones are real and want all the space. */
  width: 100%;
  height: 100dvh;
  max-width: 100vw;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  font-feature-settings: "ss01", "cv11";
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  /* respect notch / home indicator */
  padding-top: env(safe-area-inset-top, 0);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.sb-screen *,
.sb-screen *::before,
.sb-screen *::after { box-sizing: border-box; }

/* ─── status bar ─────────────────────────────────────────────────────────── */
/* Hidden on real iOS — system status bar already shows. Only visible if you
   want the in-app fake one. We hide by default; flip with `data-show` if
   needed for testing. */
.sb-status {
  display: none;
  height: 44px;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px 0 28px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-strong);
  background: var(--page);
  position: relative;
  z-index: 30;
}
.sb-status[data-show="1"] { display: flex; }
.sb-status .sb-status-icons { display: flex; gap: 6px; align-items: center; }
.sb-status svg { display: block; }

/* ─── topbar ─────────────────────────────────────────────────────────────── */

.sb-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--hairline);
  min-height: 52px;
  background: var(--page);
  flex-shrink: 0;
  gap: 10px;
}
.sb-topbar .sb-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}
.sb-topbar .sb-bar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.sb-icon-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--ink-mute);
  border-radius: var(--r-xs);
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
}
.sb-icon-btn:hover, .sb-icon-btn:active { background: var(--page-hover); color: var(--ink); }

.sb-crumbs {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 13.5px;
  color: var(--ink-mute);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sb-crumbs .sb-sep { color: var(--ink-whisper); font-size: 11px; }
.sb-crumbs .sb-crumb-last { color: var(--ink-strong); font-weight: 500; }

/* ─── buttons (sb-prefixed; do not clash with .btn) ─────────────────────── */

.sb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: var(--page);
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-sm);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
}
.sb-btn:hover, .sb-btn:active { background: var(--page-hover); }
.sb-btn.sb-sm { padding: 6px 10px; font-size: 12.5px; }
.sb-btn.sb-accent {
  background: var(--ink-strong);
  color: #fff;
  border-color: var(--ink-strong);
}
.sb-btn.sb-accent:hover, .sb-btn.sb-accent:active { background: var(--ink); border-color: var(--ink); }
.sb-btn.sb-ghost { border-color: transparent; }
.sb-btn.sb-danger { color: var(--brick); border-color: var(--brick); }

/* ─── page-pad ───────────────────────────────────────────────────────────── */

.sb-page-pad {
  padding: 18px 16px 28px;
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  -webkit-overflow-scrolling: touch;
}
/* ─── type primitives ────────────────────────────────────────────────────── */

.sb-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.sb-page-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 28px;
  letter-spacing: -0.022em;
  line-height: 1.1;
  color: var(--ink-strong);
  margin: 0 0 6px;
}
.sb-page-title em { font-style: italic; font-weight: 500; }
.sb-page-subtitle {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 18px;
  line-height: 1.5;
}
.sb-page-subtitle strong { color: var(--ink-strong); font-weight: 600; }
.sb-page-subtitle .sb-dot-sep { color: var(--ink-whisper); margin: 0 6px; }


.sb-date-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.sb-dot-sep { color: var(--ink-whisper); margin: 0 6px; }

.sb-saved {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--moss);
  letter-spacing: 0.04em;
}

/* ─── KPI tiles ─────────────────────────────────────────────────────────── */

.sb-kpi {
  background: rgba(251, 251, 250, 0.82);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  padding: 12px 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  backdrop-filter: blur(2px);
}
.sb-kpi .sb-kpi-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}
.sb-kpi .sb-kpi-num {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink-strong);
  margin-left: auto;
}
.sb-kpi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

/* ─── up-next dark card ─────────────────────────────────────────────────── */

.sb-upnext {
  background: var(--ink-strong);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 16px 18px 18px;
  position: relative;
  overflow: hidden;
  margin-bottom: 14px;
}
.sb-upnext::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(37, 64, 217, 0.4), transparent 70%);
  pointer-events: none;
}
.sb-upnext .sb-up-label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.55;
}
.sb-upnext .sb-up-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 6px 0 4px;
  color: #fff;
}
.sb-upnext .sb-up-meta { font-size: 12.5px; opacity: 0.65; }
.sb-upnext .sb-up-days {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-top: 12px;
  color: #fff;
  position: relative;
  z-index: 1;
}
.sb-upnext .sb-up-days span {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 400;
  opacity: 0.55;
  margin-left: 6px;
}

/* ─── upcoming-mini ─────────────────────────────────────────────────────── */

.sb-upcoming {
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.84);
  overflow: hidden;
  margin-bottom: 14px;
}
.sb-upcoming-head {
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--hairline-soft);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.sb-upcoming-head h3 {
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
  margin: 0;
}
.sb-upcoming-head a {
  font-size: 11.5px;
  color: var(--ink-soft);
  text-decoration: none;
  cursor: pointer;
}
.sb-upcoming-row {
  padding: 9px 12px;
  border-bottom: 1px solid var(--hairline-soft);
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.sb-upcoming-row:last-child { border-bottom: none; }
.sb-upcoming-row .sb-glyph { font-size: 14px; }
.sb-upcoming-row .sb-title {
  flex: 1;
  font-weight: 500;
  font-size: 13.5px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-upcoming-row .sb-when {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}

/* ─── status-color dots ─────────────────────────────────────────────────── */

.sb-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}
.sb-dot.exam { background: var(--brick); }
.sb-dot.assignment { background: var(--slate); }
.sb-dot.study { background: var(--moss); }
.sb-dot.other { background: var(--ink-mute); }

/* ─── mini-cal ──────────────────────────────────────────────────────────── */

.sb-mini-cal {
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.84);
  margin-bottom: 14px;
}
.sb-mini-cal-head {
  padding: 10px 14px;
  background: var(--page-tint);
  border-bottom: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sb-mini-cal-head .sb-month {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}
.sb-mini-cal-head .sb-ctrls { display: flex; gap: 4px; }
.sb-mini-cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}
.sb-mini-dow {
  padding: 6px 0;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-align: center;
  border-bottom: 1px solid var(--hairline);
}
.sb-mini-cell {
  min-height: 50px;
  padding: 4px 6px;
  border-bottom: 1px solid var(--hairline-soft);
  border-right: 1px solid var(--hairline-soft);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sb-mini-cell:nth-child(7n) { border-right: none; }
.sb-mini-cell.dim { background: var(--page-tint); color: var(--ink-whisper); }
.sb-mini-cell.today { background: var(--accent-faint); }
.sb-mini-cell.today .sb-day-num {
  background: var(--ink-strong);
  color: #fff;
  border-radius: 999px;
  padding: 1px 6px;
  font-weight: 600;
  align-self: flex-start;
}
.sb-mini-cell .sb-day-num { padding: 1px 3px; align-self: flex-start; }
.sb-mini-dots {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-bottom: 2px;
  padding-left: 2px;
}

/* ─── quick-tile ────────────────────────────────────────────────────────── */

.sb-quick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 6px;
}
.sb-quick-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.7);
  min-height: 88px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.sb-quick-tile:active { background: var(--page-hover); }
.sb-quick-tile .sb-qt-glyph {
  width: 28px;
  height: 28px;
  background: var(--page-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  font-size: 14px;
}
.sb-quick-tile .sb-qt-label {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}
.sb-quick-tile .sb-qt-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.sb-quick-tile.primary {
  background: var(--ink-strong);
  border-color: var(--ink-strong);
  color: #fff;
}
.sb-quick-tile.primary .sb-qt-label,
.sb-quick-tile.primary .sb-qt-sub { color: #fff; }
.sb-quick-tile.primary .sb-qt-sub { opacity: 0.55; }
.sb-quick-tile.primary .sb-qt-glyph {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.18);
  color: #fff;
}

/* ─── filter chips strip ────────────────────────────────────────────────── */

.sb-chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 14px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.sb-chips::-webkit-scrollbar { display: none; }
.sb-chip {
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--hairline-bold);
  background: var(--page);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
  cursor: pointer;
}
.sb-chip.active {
  background: var(--ink-strong);
  color: #fff;
  border-color: var(--ink-strong);
}

/* ─── library row ───────────────────────────────────────────────────────── */

.sb-card-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline-soft);
  cursor: pointer;
}
.sb-card-row:active { background: var(--page-hover); margin: 0 -16px; padding: 12px 16px; }
.sb-card-row .sb-cr-line1 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink-soft);
}
.sb-card-row .sb-cr-line1 .sb-time {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}
.sb-card-row .sb-cr-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-strong);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-card-row .sb-cr-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  text-transform: lowercase;
}

/* ─── note row ──────────────────────────────────────────────────────────── */

.sb-note-row {
  padding: 11px 0;
  border-bottom: 1px solid var(--hairline-soft);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sb-note-row .sb-nr-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.sb-note-row .sb-nr-title {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-strong);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-note-row .sb-nr-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}
.sb-note-row .sb-nr-snippet {
  font-size: 12.5px;
  color: var(--ink-mute);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── drawer ────────────────────────────────────────────────────────────── */

.sb-drawer {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  pointer-events: none;
}
.sb-drawer.open { pointer-events: auto; }
.sb-drawer .sb-scrim {
  position: absolute;
  inset: 0;
  background: rgba(20, 18, 14, 0.5);
  opacity: 0;
  transition: opacity 0.2s;
}
.sb-drawer.open .sb-scrim { opacity: 1; }
.sb-drawer .sb-drawer-body {
  width: 300px;
  max-width: 86%;
  background: var(--page-soft);
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.08);
  padding-top: env(safe-area-inset-top, 0);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.sb-drawer.open .sb-drawer-body { transform: translateX(0); }

.sb-sb-head {
  padding: 14px 14px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sb-sb-brand { display: flex; align-items: center; gap: 8px; }
.sb-brand-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, #1f1d18 0%, #37352f 100%);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: 16px;
  color: #fff;
}
.sb-brand-mark {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}
.sb-search-box {
  margin: 4px 8px;
  padding: 8px 10px;
  background: var(--page);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-mute);
  cursor: pointer;
}
.sb-search-box .sb-search-glyph {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-mute);
}
.sb-sb-scroll {
  flex: 1;
  overflow-y: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}
.sb-nav-section { padding: 4px 10px; }
.sb-nav-section-label {
  padding: 10px 12px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink-strong);
}
.sb-nav-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 11px;
  margin: 1px 0;
  border-radius: var(--r-sm);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
}
.sb-nav-item:hover, .sb-nav-item:active {
  background: var(--page-hover);
  color: var(--ink-strong);
}
.sb-nav-item.active {
  background: var(--page-hover);
  color: var(--ink-strong);
  font-weight: 600;
}
.sb-nav-item .sb-nav-glyph {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-size: 16px;
  color: var(--ink-soft);
}
.sb-nav-item .sb-nav-label { flex: 1; }
.sb-nav-item .sb-badge {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-mute);
}

.sb-nav-primary {
  margin: 4px 8px;
  padding: 9px 12px;
  background: var(--ink-strong);
  color: #fff;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
}

.sb-sb-foot {
  border-top: 1px solid var(--hairline);
  padding: 10px 8px 12px;
}
.sb-user-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  border-radius: var(--r-sm);
}
.sb-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink-strong);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 600;
}
.sb-user-card .sb-uc-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-strong);
}
.sb-user-card .sb-uc-email {
  font-size: 11px;
  color: var(--ink-mute);
}

/* ─── doodle layer ──────────────────────────────────────────────────────── */

.sb-doodles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.06;
  z-index: 0;
}
.sb-pp-rel { position: relative; z-index: 1; }

/* ─── editor (note editor) ──────────────────────────────────────────────── */

.sb-editor {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px 24px;
  min-height: 0;
  -webkit-overflow-scrolling: touch;
}
.sb-editor-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.sb-editor-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 30px;
  letter-spacing: -0.022em;
  line-height: 1.12;
  color: var(--ink-strong);
  margin: 0 0 18px;
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
}

.sb-editor-toolbar {
  flex-shrink: 0;
  border-top: 1px solid var(--hairline);
  background: var(--page);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--serif);
}
.sb-tt-btn {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-size: 14px;
  color: var(--ink);
  border-radius: var(--r-xs);
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: none;
}
.sb-tt-btn:hover, .sb-tt-btn:active { background: var(--page-hover); }
.sb-tt-divider { width: 1px; height: 18px; background: var(--hairline-bold); margin: 0 4px; }

/* ─── legend ────────────────────────────────────────────────────────────── */

.sb-legend {
  display: flex;
  gap: 14px;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}
.sb-leg-item { display: flex; align-items: center; gap: 6px; }

.sb-section-h {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
  margin: 18px 0 10px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.sb-section-c {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-mute);
}

/* ─── event row / hero ─────────────────────────────────────────────────── */

.sb-event-row {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline-soft);
  cursor: pointer;
}
.sb-er-date {
  width: 44px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2px;
}
.sb-er-d {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink-strong);
}
.sb-er-m {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-top: 4px;
}
.sb-er-body { flex: 1; min-width: 0; }
.sb-er-line1 {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--ink-soft);
  margin-bottom: 2px;
}
.sb-er-title {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-strong);
  margin-bottom: 2px;
}
.sb-er-meta { font-size: 12px; color: var(--ink-mute); }

.sb-event-hero {
  background: var(--ink-strong);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 18px 18px 16px;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.sb-event-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(176, 71, 61, 0.45), transparent 70%);
}
.sb-eh-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
  margin-bottom: 10px;
}
.sb-eh-title {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: #fff;
  position: relative;
}
.sb-eh-meta { display: flex; flex-direction: column; gap: 6px; position: relative; }
.sb-eh-row { display: flex; gap: 14px; font-size: 13px; }
.sb-eh-k {
  width: 60px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.55;
  padding-top: 2px;
}
.sb-eh-v { color: #fff; flex: 1; }
.sb-eh-v strong { font-family: var(--serif); font-size: 16px; }

/* ─── link card / plan ──────────────────────────────────────────────────── */

.sb-link-card {
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-md);
  padding: 14px 16px;
  background: var(--page);
  margin-bottom: 6px;
}
.sb-lc-head {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.sb-lc-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}
.sb-lc-meta { font-size: 12px; color: var(--ink-mute); margin-top: 4px; }
.sb-lc-actions { display: flex; gap: 8px; margin-top: 12px; }

.sb-plan {
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: var(--page);
  overflow: hidden;
}
.sb-plan-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 13.5px;
}
.sb-plan-row:last-child { border: none; }
.sb-plan-task { flex: 1; color: var(--ink-strong); }
.sb-plan-est {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}

/* ─── CTA row ───────────────────────────────────────────────────────────── */

.sb-cta-row {
  display: flex;
  gap: 10px;
  margin-top: 22px;
}
.sb-btn.sb-block {
  flex: 1;
  justify-content: center;
  padding: 12px 14px;
  font-size: 13.5px;
}

/* ─── stat strip / source row / outline ─────────────────────────────────── */

.sb-stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hairline-bold);
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 18px;
}
.sb-stat {
  background: var(--page);
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.sb-stat-num {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
}
.sb-stat-lbl {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.sb-src-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hairline-soft);
  cursor: pointer;
}
.sb-src-icon {
  width: 32px;
  height: 36px;
  border-radius: var(--r-xs);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  flex-shrink: 0;
}
.sb-src-icon.pdf { background: var(--brick); }
.sb-src-icon.img { background: var(--moss); }
.sb-src-icon.link { background: var(--slate); }
.sb-src-icon.doc { background: var(--amber); }
.sb-src-body { flex: 1; min-width: 0; }
.sb-src-title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-strong);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-src-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
  margin-top: 2px;
}

.sb-outline {
  list-style: none;
  padding: 0;
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--page);
}
.sb-outline li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--hairline-soft);
}
.sb-outline li:last-child { border: none; }
.sb-ol-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-whisper);
}
.sb-ol-t {
  flex: 1;
  font-family: var(--serif);
  font-size: 14.5px;
  letter-spacing: -0.005em;
  color: var(--ink-strong);
}
.sb-ol-c {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
}

/* ─── source / pdf viewer ───────────────────────────────────────────────── */

.sb-source-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--hairline);
  background: var(--page-tint);
  flex-shrink: 0;
}
.sb-src-pill {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}
.sb-source-bottom {
  flex-shrink: 0;
  display: flex;
  gap: 8px;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--hairline);
  background: var(--page);
}

/* ─── flashcard ─────────────────────────────────────────────────────────── */

.sb-fc-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 16px 18px;
  gap: 14px;
  min-height: 0;
}
.sb-fc-progress { flex-shrink: 0; }
.sb-fc-pg-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
.sb-fc-pg-bar {
  height: 3px;
  background: var(--hairline);
  border-radius: 2px;
  overflow: hidden;
}
.sb-fc-pg-fill {
  height: 100%;
  background: var(--ink-strong);
  transition: width 0.3s ease;
}

.sb-flashcard {
  flex: 1;
  background: var(--note-paper);
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-lg);
  padding: 24px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: 0 1px 2px rgba(0,0,0,0.02), 0 4px 16px rgba(0,0,0,0.04);
  min-height: 0;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.sb-flashcard.flipped { background: var(--page-tint); }
.sb-fc-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-whisper);
  margin-bottom: 14px;
}
.sb-fc-q {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.32;
  letter-spacing: -0.012em;
  color: var(--ink-strong);
}
.sb-fc-q em { font-style: italic; }
.sb-fc-tap-hint {
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-whisper);
  text-align: center;
}
.sb-fc-corner {
  position: absolute;
  bottom: 14px;
  right: 16px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-whisper);
  letter-spacing: 0.06em;
}

.sb-fc-rate { flex-shrink: 0; }
.sb-fc-rate-label {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  margin-bottom: 8px;
  text-align: center;
}
.sb-fc-rate-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.sb-rate-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 4px;
  background: var(--page);
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-md);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink);
}
.sb-rate-btn:active { transform: scale(0.97); }
.sb-rate-glyph {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  margin-bottom: 2px;
}
.sb-rate-time {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-mute);
}
.sb-rate-btn.again { border-color: rgba(176, 71, 61, 0.32); color: var(--brick); }
.sb-rate-btn.hard  { border-color: rgba(162, 109, 31, 0.32); color: var(--amber); }
.sb-rate-btn.good  { border-color: rgba(80, 112, 160, 0.32); color: var(--slate); }
.sb-rate-btn.easy  { border-color: rgba(90, 125, 79, 0.32); color: var(--moss); }

.sb-fc-stats {
  font-family: var(--mono);
  font-size: 10.5px;
  text-align: center;
  color: var(--ink-mute);
  display: flex;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ─── quiz ──────────────────────────────────────────────────────────────── */

.sb-quiz-progress { margin-bottom: 18px; }
.sb-quiz-q-num {
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
.sb-quiz-q {
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink-strong);
  margin-bottom: 18px;
}
.sb-quiz-options { display: flex; flex-direction: column; gap: 8px; }
.sb-quiz-opt {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-md);
  background: var(--page);
  cursor: pointer;
  position: relative;
}
.sb-quiz-opt.selected {
  border-color: var(--ink-strong);
  background: var(--page-tint);
}
.sb-opt-letter {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--page-soft);
  border: 1px solid var(--hairline-bold);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-mute);
  flex-shrink: 0;
}
.sb-quiz-opt.selected .sb-opt-letter {
  background: var(--ink-strong);
  color: #fff;
  border-color: var(--ink-strong);
}
.sb-opt-text {
  flex: 1;
  font-size: 13.5px;
  color: var(--ink-strong);
  line-height: 1.4;
}
.sb-opt-check {
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ink-strong);
}

.sb-quiz-foot { display: flex; gap: 8px; margin-top: 18px; }
.sb-quiz-foot .sb-btn { padding: 12px 14px; font-size: 13.5px; justify-content: center; }
.sb-quiz-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding: 10px 12px;
  background: var(--accent-faint);
  border: 1px solid var(--accent-tint);
  border-radius: var(--r-sm);
  font-size: 11.5px;
  color: var(--ink-soft);
}
.sb-quiz-hint em { font-style: italic; color: var(--accent); }
.sb-timer {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-strong);
  padding: 4px 10px;
  background: var(--page-soft);
  border-radius: var(--r-xs);
}

/* ─── results ───────────────────────────────────────────────────────────── */

.sb-results-hero {
  text-align: center;
  padding: 24px 0 22px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 18px;
}
.sb-rh-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin-bottom: 14px;
}
.sb-rh-score {
  font-family: var(--serif);
  display: inline-flex;
  align-items: baseline;
}
.sb-rh-num {
  font-size: 72px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink-strong);
}
.sb-rh-of {
  font-size: 24px;
  color: var(--ink-mute);
  margin-left: 6px;
}
.sb-rh-pct {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--ink-soft);
  margin-top: 8px;
}

.sb-result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.sb-rs-cell {
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  padding: 12px 6px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sb-rs-num {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink-strong);
}
.sb-rs-num.good { color: var(--moss); }
.sb-rs-num.bad { color: var(--brick); }
.sb-rs-lbl {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}

.sb-missed {
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--brick);
  background: var(--page);
  padding: 10px 12px;
  border-radius: var(--r-sm);
  margin-bottom: 8px;
}
.sb-missed-num {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--brick);
  letter-spacing: 0.06em;
  margin-bottom: 3px;
}
.sb-missed-q {
  font-family: var(--serif);
  font-size: 13.5px;
  color: var(--ink-strong);
  line-height: 1.4;
  margin-bottom: 4px;
}
.sb-missed-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
}

/* ─── upload + generation ──────────────────────────────────────────────── */

.sb-step-pill {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}
.sb-dropzone {
  border: 1.5px dashed var(--hairline-bold);
  border-radius: var(--r-md);
  padding: 26px 18px;
  text-align: center;
  background: var(--page-tint);
  margin-bottom: 18px;
  cursor: pointer;
}
.sb-dz-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 10px;
  border-radius: 50%;
  background: var(--page);
  border: 1px solid var(--hairline-bold);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink-strong);
}
.sb-dz-title {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-strong);
  margin-bottom: 4px;
}
.sb-dz-sub { font-size: 11.5px; color: var(--ink-mute); }

.sb-up-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline-soft);
}
.sb-up-body { flex: 1; min-width: 0; }
.sb-up-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-strong);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-up-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
  margin-top: 2px;
}
.sb-gen-card {
  background: var(--ink-strong);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 22px 18px;
  margin-bottom: 18px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.sb-gen-spin {
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 12px;
}
.sb-gen-orb {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #6b7fd9, #2540d9 60%, #18215c);
  box-shadow: 0 0 30px rgba(37, 64, 217, 0.6);
  animation: sb-orb 2.4s ease-in-out infinite;
}
@keyframes sb-orb {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.08); }
}
.sb-gen-status {
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: -0.005em;
  color: #fff;
  margin-bottom: 12px;
}
.sb-gen-bar {
  height: 4px;
  background: rgba(255,255,255,0.12);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 8px;
}
.sb-gen-bar-fill { height: 100%; background: #fff; transition: width 0.4s; }
.sb-gen-pct {
  font-family: var(--mono);
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.06em;
}

.sb-gen-steps {
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: var(--page);
  overflow: hidden;
}
.sb-gen-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 13px;
  color: var(--ink-soft);
}
.sb-gen-step:last-child { border: none; }
.sb-gs-mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  background: var(--page-soft);
  border: 1px solid var(--hairline);
  color: var(--ink-whisper);
  flex-shrink: 0;
}
.sb-gen-step.done .sb-gs-mark {
  background: var(--moss);
  color: #fff;
  border-color: var(--moss);
}
.sb-gen-step.done { color: var(--ink-soft); }
.sb-gen-step.active .sb-gs-mark {
  background: var(--ink-strong);
  color: #fff;
  border-color: var(--ink-strong);
}
.sb-gen-step.active { color: var(--ink-strong); font-weight: 500; }
.sb-gs-name { flex: 1; }
.sb-gs-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-mute);
}
.sb-spin { display: inline-block; animation: sbspin 1.4s linear infinite; }
@keyframes sbspin { to { transform: rotate(360deg); } }

/* ─── empty state ───────────────────────────────────────────────────────── */

/* ─── onboarding ────────────────────────────────────────────────────────── */

.sb-onb-skip {
  display: flex;
  justify-content: space-between;
  padding: 14px 18px 0;
  flex-shrink: 0;
}
.sb-onb-skip-text {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  cursor: pointer;
}
.sb-onb-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 20px 24px 24px;
}
.sb-onb-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.sb-onb-mark {
  width: 60px;
  height: 60px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, #1f1d18 0%, #37352f 100%);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 30px;
  color: #fff;
  margin-bottom: 28px;
}
.sb-onb-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.sb-onb-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 56px;
  letter-spacing: -0.03em;
  line-height: 0.98;
  color: var(--ink-strong);
  margin: 0 0 22px;
}
.sb-onb-title em { font-style: italic; color: var(--ink-strong); }
.sb-onb-tagline {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
  color: var(--ink-soft);
  margin: 0 0 28px;
  max-width: 280px;
}
.sb-onb-stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}
.sb-onb-stat {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 14.5px;
  color: var(--ink-soft);
}
.sb-onb-stat span:first-child { font-size: 16px; }
.sb-onb-bottom {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.sb-onb-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin-bottom: 18px;
}
.sb-onb-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
}
.sb-onb-dot.active { background: var(--ink-strong); width: 18px; border-radius: 3px; }
.sb-onb-foot {
  text-align: center;
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--ink-mute);
}
.sb-onb-foot-link {
  color: var(--ink-strong);
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

/* ─── modal sheet ───────────────────────────────────────────────────────── */

.sb-modal-scrim {
  position: fixed;
  inset: 0;
  background: rgba(20, 18, 14, 0.5);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.sb-modal-sheet {
  background: var(--page);
  width: 100%;
  max-height: 86dvh;
  border-radius: 16px 16px 0 0;
  padding: 18px 18px calc(18px + env(safe-area-inset-bottom, 0));
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: sb-sheet-up 0.22s ease;
  overflow-y: auto;
}
@keyframes sb-sheet-up {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}
.sb-modal-handle {
  width: 36px;
  height: 4px;
  background: var(--hairline-bold);
  border-radius: 2px;
  margin: -8px auto 4px;
  flex-shrink: 0;
}
.sb-modal-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink-strong);
  margin: 0;
}
.sb-modal-sub {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0 0 6px;
}
.sb-input-mb {
  width: 100%;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--hairline-bold);
  border-radius: var(--r-sm);
  background: var(--page);
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-strong);
}
.sb-input-mb:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-faint);
}
/* ─── toast ─────────────────────────────────────────────────────────────── */

.sb-toast {
  position: fixed;
  left: 50%;
  bottom: calc(28px + env(safe-area-inset-bottom, 0));
  transform: translateX(-50%);
  background: var(--ink-strong);
  color: #fff;
  font-size: 13px;
  padding: 10px 18px;
  border-radius: 999px;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  animation: sb-toast-in 0.2s ease;
  pointer-events: none;
  max-width: 86vw;
  text-align: center;
}
@keyframes sb-toast-in {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ─── keep desktop landing untouched ─────────────────────────────────────
   The mobile UI only mounts when window.innerWidth < 720 OR ?mobile=1 — so
   no media-query needed here. Class names are sb-prefixed; they don't leak. */

/* Field labels above inputs in modals (NewGuide / NewNote) */
.sb-field-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.sb-field-label + .sb-input-mb {
  margin-bottom: 14px;
}