:root {
  --ink: #06161c;
  --brand: #0a3642;
  --brand-deep: #0c4a44;
  --accent: #14967f;
  --glow: #2cbc9b;
  --sand: #d8ece8;
  --bg: #f3f7f8;
  --bg-elevated: #ffffff;
  --text: #0f1c22;
  --muted: #5d737c;
  --border: rgba(10, 54, 66, 0.1);
  --danger: #c23b2e;
  --ok: #0d8a5a;
  --radius: 18px;
  --radius-sm: 12px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --shadow: 0 12px 40px rgba(6, 22, 28, 0.08);
  --shadow-lg: 0 28px 60px rgba(6, 22, 28, 0.14);
  --header-h: 58px;
  --tab-h: 68px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

.dark {
  --ink: #e8f4f2;
  --brand: #8ad0db;
  --brand-deep: #2cbc9b;
  --accent: #2cbc9b;
  --glow: #6ee0c4;
  --sand: #123038;
  --bg: #071014;
  --bg-elevated: #0e1a20;
  --text: #e8f2f5;
  --muted: #8fa6af;
  --border: rgba(138, 208, 219, 0.12);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 28px 60px rgba(0, 0, 0, 0.5);
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
  text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(44, 188, 155, 0.12), transparent 55%),
    radial-gradient(900px 400px at 100% 0%, rgba(10, 54, 66, 0.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100dvh;
  padding-bottom: calc(var(--safe-b));
}
[x-cloak] { display: none !important; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--brand-deep); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 0;
}

.container { width: min(1080px, calc(100% - 1.5rem)); margin-inline: auto; }
.muted { color: var(--muted); }
.chip {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.28rem 0.7rem; border-radius: 999px;
  background: color-mix(in srgb, var(--glow) 18%, transparent);
  color: var(--brand-deep); font-size: 0.75rem; font-weight: 800;
  letter-spacing: 0.02em;
}

/* —— Buttons —— */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
  border: 0; border-radius: 999px; padding: 0.78rem 1.25rem;
  font-weight: 800; font-family: inherit; cursor: pointer;
  background: linear-gradient(135deg, var(--brand-deep), #0f6b5e);
  color: #fff;
  box-shadow: 0 10px 24px rgba(12, 74, 68, 0.28);
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
  min-height: 46px;
}
.btn:active { transform: scale(0.98); }
.btn:hover { color: #fff; box-shadow: 0 14px 28px rgba(12, 74, 68, 0.34); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost {
  background: color-mix(in srgb, var(--bg-elevated) 80%, transparent);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}
.btn-ghost:hover { color: var(--text); background: var(--bg-elevated); }
.btn-danger { background: var(--danger); box-shadow: 0 8px 20px rgba(194, 59, 46, 0.25); }
.btn-sm { padding: 0.45rem 0.85rem; min-height: 36px; font-size: 0.86rem; }
.btn-block { width: 100%; }

/* —— Landing header —— */
.site-header {
  position: sticky; top: 0; z-index: 50;
  padding-top: var(--safe-t);
  backdrop-filter: blur(16px) saturate(1.2);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem; padding: 0.75rem 0; min-height: var(--header-h);
}
.brand {
  font-family: var(--font-display);
  font-size: 1.28rem;
  color: var(--brand-deep);
  font-weight: 700;
}
.nav-links {
  display: none;
  flex-wrap: wrap; gap: 0.35rem 0.9rem; align-items: center;
}
.nav-links a { color: var(--text); font-weight: 700; font-size: 0.9rem; }
.nav-toggle {
  display: inline-flex; width: 42px; height: 42px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-elevated);
  align-items: center; justify-content: center; cursor: pointer;
}
.nav-mobile {
  display: none; flex-direction: column; gap: 0.35rem;
  padding: 0 0 0.85rem;
}
.nav-mobile.open { display: flex; }
.nav-mobile a, .nav-mobile button {
  padding: 0.75rem 0.85rem; border-radius: 12px;
  font-weight: 700; color: var(--text); background: transparent; border: 0; text-align: left;
}
.nav-mobile a:hover { background: color-mix(in srgb, var(--glow) 12%, transparent); }
@media (min-width: 860px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .nav-mobile { display: none !important; }
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: min(92dvh, 760px);
  display: grid; align-items: end;
  padding: 2rem 0 calc(2.5rem + var(--safe-b));
  color: #eef8f6;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(4, 18, 24, 0.15) 0%, rgba(4, 18, 24, 0.72) 58%, rgba(4, 18, 24, 0.92) 100%),
    radial-gradient(ellipse 90% 70% at 70% 20%, rgba(44, 188, 155, 0.35), transparent 55%),
    linear-gradient(145deg, #04161c 0%, #0c4a44 42%, #0a3642 100%);
}
.hero::after {
  content: "";
  position: absolute; inset: auto -20% -30% 20%;
  height: 55%;
  background: radial-gradient(circle, rgba(44, 188, 155, 0.22), transparent 65%);
  pointer-events: none;
  animation: floatGlow 8s ease-in-out infinite alternate;
}
.hero .container { position: relative; z-index: 1; }
.hero-kicker {
  display: inline-flex; margin-bottom: 0.85rem;
  padding: 0.35rem 0.8rem; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.08);
  font-size: 0.78rem; font-weight: 800; letter-spacing: 0.04em;
  text-transform: uppercase;
}
.brand-hero {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 11vw, 4.6rem);
  margin: 0 0 0.7rem;
  color: #fff;
  text-shadow: 0 12px 40px rgba(0,0,0,.25);
}
.hero p {
  max-width: 28rem; margin: 0;
  color: rgba(238, 248, 246, 0.88);
  font-size: 1.05rem; font-weight: 500;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.6rem; }
.hero .btn {
  background: #2cbc9b; color: #04161c;
  box-shadow: 0 14px 32px rgba(44, 188, 155, 0.35);
}
.hero .btn-ghost {
  border-color: rgba(255,255,255,.28); color: #fff;
  background: rgba(255,255,255,.06);
}

@keyframes floatGlow {
  from { transform: translateY(0) scale(1); opacity: 0.7; }
  to { transform: translateY(-18px) scale(1.08); opacity: 1; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
.rise { animation: rise .6s cubic-bezier(.22,1,.36,1) both; }
.rise-delay { animation-delay: .12s; }
.rise-delay-2 { animation-delay: .22s; }

.section { padding: 2.4rem 0; }
.section-title { margin: 0 0 0.35rem; font-size: clamp(1.45rem, 4vw, 2rem); }
.section-lead { color: var(--muted); margin: 0 0 1.35rem; max-width: 36rem; font-weight: 500; }

.grid { display: grid; gap: 0.9rem; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.tile {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.tile::before {
  content: "";
  position: absolute; inset: 0 auto 0 0; width: 3px;
  background: linear-gradient(180deg, var(--glow), var(--brand-deep));
  opacity: 0; transition: opacity .2s ease;
}
.tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--glow) 35%, var(--border));
  color: inherit;
}
.tile:hover::before { opacity: 1; }
.tile h3 { margin: 0 0 0.35rem; font-size: 1.12rem; }
.tile p { margin: 0; color: var(--muted); font-size: 0.93rem; }
.tile-arrow {
  margin-top: 0.85rem; font-size: 0.82rem; font-weight: 800;
  color: var(--accent);
}

.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 calc(2rem + var(--safe-b));
  border-top: 1px solid var(--border);
  color: var(--muted); font-size: 0.9rem;
}
.footer-grid {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.credit { margin-top: 1.1rem; }
.credit a { font-style: italic; }

/* —— Forms / auth —— */
.form { display: grid; gap: 0.85rem; max-width: 420px; }
.form-wide { max-width: 720px; }
label { display: grid; gap: 0.35rem; font-weight: 700; font-size: 0.9rem; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.85rem 0.95rem;
  min-height: 48px;
}
textarea { min-height: 120px; resize: vertical; }
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.95rem 1.1rem;
  border-radius: 16px;
  margin-bottom: 1rem;
  font-weight: 650;
  font-size: 0.95rem;
  line-height: 1.45;
  border: 1px solid transparent;
  box-shadow: 0 8px 24px rgba(15, 40, 35, 0.06);
}
.alert::before {
  content: "";
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  margin-top: 0.1rem;
  border-radius: 999px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 0.75rem;
}
.alert-success {
  background: color-mix(in srgb, #2dd4bf 14%, #f0fdf9);
  color: #0f5c52;
  border-color: color-mix(in srgb, #2dd4bf 35%, transparent);
}
.alert-success::before {
  background-color: color-mix(in srgb, #14b8a6 35%, white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f5c52' stroke-width='2.6'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}
.alert-error {
  background: color-mix(in srgb, #ef4444 12%, #fff7f6);
  color: #9f2d2d;
  border-color: color-mix(in srgb, #ef4444 28%, transparent);
}
.alert-error::before {
  background-color: color-mix(in srgb, #ef4444 22%, white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239f2d2d' stroke-width='2.6'%3E%3Cpath d='M12 8v5M12 16h.01'/%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3C/svg%3E");
}
.alert-info {
  background: color-mix(in srgb, #0ea5e9 12%, #f0f9ff);
  color: #0c4a6e;
  border-color: color-mix(in srgb, #0ea5e9 28%, transparent);
}
html.dark .alert,
.dark .alert {
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
}
html.dark .alert-success,
.dark .alert-success {
  background: rgba(45, 212, 191, 0.12);
  color: #99f6e4;
  border-color: rgba(45, 212, 191, 0.28);
}
html.dark .alert-success::before,
.dark .alert-success::before {
  background-color: rgba(45, 212, 191, 0.22);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2399f6e4' stroke-width='2.6'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}
html.dark .alert-error,
.dark .alert-error {
  background: rgba(239, 68, 68, 0.14);
  color: #fecaca;
  border-color: rgba(239, 68, 68, 0.3);
}
html.dark .alert-error::before,
.dark .alert-error::before {
  background-color: rgba(239, 68, 68, 0.22);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fecaca' stroke-width='2.6'%3E%3Cpath d='M12 8v5M12 16h.01'/%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3C/svg%3E");
}

.auth-wrap {
  min-height: 100dvh; display: grid; place-items: center;
  padding: calc(1.5rem + var(--safe-t)) 1rem calc(1.5rem + var(--safe-b));
  background:
    radial-gradient(circle at 15% 10%, rgba(44,188,155,.18), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(10,54,66,.12), transparent 35%),
    var(--bg);
}
.auth-card {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.75rem 1.4rem;
  box-shadow: var(--shadow-lg);
}

/* —— App shell (PWA) —— */
.app-shell {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding-top: 0;
}
.app-top {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  padding-top: calc(0.7rem + var(--safe-t));
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
}
.app-top .brand { font-size: 1.15rem; }
.app-main {
  padding: calc(1rem + var(--header-h) + var(--safe-t)) 1rem calc(1.25rem + var(--tab-h) + var(--safe-b));
  width: min(820px, 100%);
  margin-inline: auto;
}
.app-tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.15rem;
  padding: 0.45rem 0.4rem calc(0.45rem + var(--safe-b));
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  backdrop-filter: blur(18px) saturate(1.2);
  border-top: 1px solid var(--border);
  box-shadow: 0 -10px 30px rgba(6, 22, 28, 0.08);
}
.app-tab {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.2rem; padding: 0.4rem 0.2rem;
  border-radius: 14px; color: var(--muted);
  font-size: 0.68rem; font-weight: 800; letter-spacing: 0.01em;
  min-height: 52px;
}
.app-tab svg { width: 22px; height: 22px; }
.app-tab.active {
  color: var(--brand-deep);
  background: color-mix(in srgb, var(--glow) 16%, transparent);
}
@media (min-width: 900px) {
  .app-shell {
    grid-template-columns: 240px 1fr;
    grid-template-rows: 1fr;
    padding-top: var(--safe-t);
  }
  .app-top { display: none; }
  .app-side {
    display: flex !important;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1.25rem 1rem;
    border-right: 1px solid var(--border);
    background: var(--bg-elevated);
    position: sticky; top: 0; height: 100dvh;
  }
  .app-tabs { display: none; }
  .app-main {
    padding: 1.5rem 1.75rem 2rem;
    width: auto; max-width: 880px;
  }
}
.app-side { display: none; }
.app-side a {
  display: flex; align-items: center; gap: 0.55rem;
  padding: 0.7rem 0.85rem; border-radius: 12px;
  color: var(--text); font-weight: 700;
}
.app-side a.active, .app-side a:hover {
  background: color-mix(in srgb, var(--glow) 14%, transparent);
  color: var(--brand-deep);
}

.page-head { margin-bottom: 1.1rem; }
.page-head .back {
  display: inline-flex; align-items: center; gap: 0.35rem;
  color: var(--muted); font-weight: 700; font-size: 0.9rem; margin-bottom: 0.45rem;
}
.stack { display: grid; gap: 0.75rem; }
.row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }

/* —— Study deck —— */
.deck {
  max-width: 640px; margin: 0 auto;
}
.progress-track {
  height: 6px; border-radius: 999px;
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  overflow: hidden; margin: 0.75rem 0 1rem;
}
.progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--brand-deep), var(--glow));
  border-radius: inherit;
  transition: width .35s cubic-bezier(.22,1,.36,1);
}
.card-meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.75rem; color: var(--muted); font-weight: 700; font-size: 0.88rem;
}
.card-stage {
  perspective: 1200px;
  min-height: 280px;
}
.card-face {
  min-height: 280px;
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--glow) 8%, var(--bg-elevated)), var(--bg-elevated));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1.5rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: grid; place-items: center;
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: transform .35s cubic-bezier(.22,1,.36,1), box-shadow .25s ease;
  position: relative;
}
.card-face.flipped {
  transform: rotateY(8deg) scale(0.985);
  box-shadow: 0 18px 40px rgba(44, 188, 155, 0.18);
}
.card-face .q {
  font-size: clamp(1.05rem, 3.6vw, 1.28rem);
  font-weight: 800; line-height: 1.4;
}
.card-face .a {
  font-size: clamp(1rem, 3.2vw, 1.15rem);
  font-weight: 600; color: color-mix(in srgb, var(--text) 92%, var(--accent));
  line-height: 1.5;
}
.card-hint {
  position: absolute; bottom: 0.9rem; left: 0; right: 0;
  font-size: 0.78rem; color: var(--muted); font-weight: 700;
}
.feedback {
  text-align: center; font-weight: 800; margin: 0.85rem 0 0.25rem;
  min-height: 1.4rem;
}
.feedback.ok { color: var(--ok); }
.feedback.bad { color: var(--danger); }

.quiz-options { display: grid; gap: 0.65rem; margin-top: 1rem; }
.quiz-options button {
  display: grid; grid-template-columns: auto 1fr; gap: 0.75rem; align-items: start;
  text-align: left; padding: 0.95rem 1rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text); cursor: pointer;
  font-weight: 650; line-height: 1.35;
  transition: transform .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease;
  min-height: 56px;
}
.quiz-options button:active:not(:disabled) { transform: scale(0.985); }
.quiz-options button:disabled {
  cursor: default;
  opacity: 1;
}
.quiz-options .letter {
  width: 28px; height: 28px; border-radius: 9px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--glow) 16%, transparent);
  color: var(--brand-deep); font-size: 0.8rem; font-weight: 900;
  flex-shrink: 0;
}
.quiz-options button.correct {
  border-color: #0d8a5a;
  background: color-mix(in srgb, #0d8a5a 16%, var(--bg-elevated));
  color: var(--text);
  box-shadow: 0 0 0 1px color-mix(in srgb, #0d8a5a 35%, transparent);
}
.quiz-options button.correct .letter {
  background: #0d8a5a;
  color: #fff;
}
.quiz-options button.wrong {
  border-color: #c23b2e;
  background: color-mix(in srgb, #c23b2e 14%, var(--bg-elevated));
  color: var(--text);
  box-shadow: 0 0 0 1px color-mix(in srgb, #c23b2e 30%, transparent);
}
.quiz-options button.wrong .letter {
  background: #c23b2e;
  color: #fff;
}
.quiz-options button.reveal-correct {
  border-color: #0d8a5a;
  background: color-mix(in srgb, #0d8a5a 10%, var(--bg-elevated));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #0d8a5a 45%, transparent);
}
.quiz-options button.reveal-correct .letter {
  background: #0d8a5a;
  color: #fff;
}
.dark .quiz-options button.correct {
  border-color: #34d399;
  background: color-mix(in srgb, #34d399 18%, var(--bg-elevated));
  box-shadow: 0 0 0 1px color-mix(in srgb, #34d399 40%, transparent);
}
.dark .quiz-options button.correct .letter {
  background: #34d399;
  color: #062016;
}
.dark .quiz-options button.wrong {
  border-color: #f87171;
  background: color-mix(in srgb, #f87171 16%, var(--bg-elevated));
  box-shadow: 0 0 0 1px color-mix(in srgb, #f87171 35%, transparent);
}
.dark .quiz-options button.wrong .letter {
  background: #f87171;
  color: #2a0a08;
}
.dark .quiz-options button.reveal-correct {
  border-color: #34d399;
  background: color-mix(in srgb, #34d399 12%, var(--bg-elevated));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #34d399 50%, transparent);
}
.dark .quiz-options button.reveal-correct .letter {
  background: #34d399;
  color: #062016;
}
.dy-actions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; margin-top: 1rem;
}
.dy-actions .btn { min-height: 52px; font-size: 1rem; }
.deck-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; margin-top: 1.1rem;
}
.deck-nav .btn { width: 100%; }

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.65rem; }
.stat {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: 16px; padding: 0.95rem 0.85rem; text-align: center;
}
.stat strong {
  display: block; font-size: 1.55rem; font-family: var(--font-display);
  margin-top: 0.2rem;
}

.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td {
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 0.35rem; text-align: left; vertical-align: top;
}
.admin-nav { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 1.1rem; }
.admin-nav a {
  padding: 0.45rem 0.8rem; border-radius: 999px; border: 1px solid var(--border);
  color: var(--text); font-weight: 700; font-size: 0.82rem;
  background: var(--bg-elevated);
}
.admin-header { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(12px); background: color-mix(in srgb, var(--bg) 85%, transparent); border-bottom: 1px solid var(--border); }
.prose { max-width: 720px; }
.prose p { white-space: pre-wrap; }

.install-banner {
  display: none;
  margin: 0.5rem 0 1rem;
  padding: 0.85rem 0.9rem;
  border-radius: 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--glow) 20%, var(--bg-elevated)), var(--bg-elevated));
  border: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}
.install-banner.show { display: flex; }
.install-banner[hidden] { display: none !important; }
.install-banner-copy {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  min-width: 0;
  flex: 1;
}
.install-banner-copy strong {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
}
.install-banner-copy span {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 550;
}
.install-banner-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}
.install-banner-close {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface, #fff) 70%, transparent);
  color: var(--muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}
.install-banner-close:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--glow) 35%, var(--border));
}
.install-banner-auth {
  margin: 0 0 1rem;
  width: 100%;
}

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

/* ========== Landing polish ========== */
.hero {
  min-height: 100dvh;
  align-items: center;
  padding-top: calc(4rem + var(--safe-t));
}
.hero-inner { max-width: 40rem; }
.hero-visual {
  position: absolute;
  inset: 12% 4% 18% auto;
  width: min(42vw, 380px);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(44,188,155,.35), transparent 55%),
    linear-gradient(220deg, rgba(255,255,255,.08), transparent),
    rgba(7, 30, 36, 0.45);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 30px 80px rgba(0,0,0,.35);
  overflow: hidden;
  display: none;
}
.hero-visual::before {
  content: "";
  position: absolute; inset: 18% 14%;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.18);
  background: linear-gradient(180deg, rgba(44,188,155,.2), rgba(10,54,66,.35));
}
.hero-visual span {
  position: absolute; left: 14%; right: 14%;
  height: 8px; border-radius: 999px;
  background: rgba(255,255,255,.16);
}
.hero-visual span:nth-child(1) { top: 28%; width: 62%; }
.hero-visual span:nth-child(2) { top: 40%; width: 48%; }
.hero-visual span:nth-child(3) { top: 52%; width: 70%; background: rgba(44,188,155,.45); }
@media (min-width: 900px) {
  .hero-visual { display: block; animation: rise .9s .2s both; }
}

.home-strip {
  padding: 2.75rem 0;
  background: color-mix(in srgb, var(--sand) 55%, var(--bg));
  border-block: 1px solid var(--border);
}
.home-steps {
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}
@media (min-width: 800px) {
  .home-steps { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}
.home-step {
  position: relative;
  padding-left: 3.2rem;
}
.home-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 2.4rem; height: 2.4rem;
  border-radius: 14px;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  background: var(--brand-deep);
  color: #fff;
}
.home-step h3 { font-size: 1.15rem; margin-bottom: 0.35rem; }
.home-step p { margin: 0; color: var(--muted); }

.exam-panel {
  display: grid;
  gap: 0;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  color: inherit;
  transition: transform .2s ease, box-shadow .2s ease;
}
a.exam-panel:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  color: inherit;
}
.exam-panel-top {
  padding: 1.35rem 1.25rem 1.15rem;
  min-height: 120px;
  display: flex; flex-direction: column; justify-content: flex-end;
  color: #eef8f6;
  background:
    linear-gradient(145deg, rgba(4,22,28,.25), rgba(4,22,28,.55)),
    linear-gradient(120deg, #0c4a44, #0a3642 55%, #14967f);
}
.exam-panel:nth-child(2) .exam-panel-top {
  background:
    linear-gradient(145deg, rgba(4,22,28,.2), rgba(4,22,28,.5)),
    linear-gradient(130deg, #08363f, #0d7467 60%, #2cbc9b);
}
.exam-panel:nth-child(3) .exam-panel-top {
  background:
    linear-gradient(145deg, rgba(4,22,28,.25), rgba(4,22,28,.55)),
    linear-gradient(140deg, #0a2f38, #0c4a44 50%, #1a8f7a);
}
.exam-panel:nth-child(4) .exam-panel-top {
  background:
    linear-gradient(145deg, rgba(4,22,28,.2), rgba(4,22,28,.5)),
    linear-gradient(125deg, #062428, #0a3642, #117a68);
}
.exam-panel-top .chip {
  align-self: flex-start;
  background: rgba(255,255,255,.14);
  color: #fff;
  margin-bottom: 0.55rem;
}
.exam-panel-top h3 { font-size: 1.35rem; color: #fff; }
.exam-panel-body {
  padding: 1rem 1.2rem 1.15rem;
}
.exam-panel-body p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.exam-panel-cta {
  margin-top: 0.85rem;
  font-weight: 800; font-size: 0.88rem; color: var(--accent);
}

/* ========== Study / exams app ========== */
.study-hero {
  border-radius: 22px;
  padding: 1.35rem 1.25rem;
  margin-bottom: 1.15rem;
  color: #eef8f6;
  background:
    radial-gradient(ellipse 80% 90% at 100% 0%, rgba(44,188,155,.35), transparent 55%),
    linear-gradient(135deg, #0a3642, #0c4a44 55%, #0f6b5e);
  box-shadow: var(--shadow);
}
.study-hero h1 { color: #fff; font-size: clamp(1.5rem, 4vw, 2rem); }
.study-hero p { margin: 0.45rem 0 0; color: rgba(238,248,246,.86); max-width: 36rem; }
.study-hero .back { color: rgba(238,248,246,.75); }

.lecture-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: inherit;
  transition: border-color .18s ease, transform .18s ease;
}
a.lecture-row:hover {
  border-color: color-mix(in srgb, var(--glow) 40%, var(--border));
  transform: translateX(2px);
  color: inherit;
}
.lecture-row h3 { font-size: 1.05rem; margin: 0 0 0.25rem; }
.lecture-row p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.lecture-meta { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.55rem; }
.section-tile {
  display: flex; flex-direction: column; gap: 0.45rem;
  padding: 1.2rem 1.15rem;
  border-radius: 18px;
  min-height: 140px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: inherit;
  position: relative;
  overflow: hidden;
}
.section-tile::after {
  content: "";
  position: absolute; right: -20%; top: -30%;
  width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--glow) 28%, transparent), transparent 70%);
}
.section-tile h3 { position: relative; z-index: 1; font-size: 1.12rem; }
.section-tile p { position: relative; z-index: 1; margin: 0; color: var(--muted); font-size: 0.9rem; flex: 1; }
.section-tile .go {
  position: relative; z-index: 1;
  font-weight: 800; font-size: 0.86rem; color: var(--accent);
}
a.section-tile:hover { border-color: color-mix(in srgb, var(--glow) 35%, var(--border)); color: inherit; }

/* ========== Admin shell ========== */
.admin-shell {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
  background:
    radial-gradient(900px 400px at 0% 0%, rgba(44,188,155,.08), transparent 50%),
    var(--bg);
}
.admin-side {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.25rem 1rem;
  background: #0a2a32;
  color: #d7ece8;
  border-right: 1px solid rgba(255,255,255,.06);
}
.admin-side .brand { color: #fff; margin-bottom: 1rem; }
.admin-side a {
  display: flex; align-items: center; gap: 0.55rem;
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  color: rgba(215,236,232,.82);
  font-weight: 700; font-size: 0.92rem;
}
.admin-side a:hover, .admin-side a.active {
  background: rgba(44,188,155,.16);
  color: #fff;
}
.admin-side .side-foot {
  margin-top: auto; padding-top: 1rem;
  display: grid; gap: 0.45rem;
}
.admin-side .side-foot a, .admin-side .side-foot .btn {
  justify-content: center;
}
.admin-top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 90%, transparent);
  backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 40;
}
.admin-top-nav {
  display: flex; gap: 0.35rem; overflow-x: auto;
  padding-bottom: 0.15rem; -webkit-overflow-scrolling: touch;
}
.admin-top-nav a {
  flex: 0 0 auto;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem; font-weight: 800;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
}
.admin-top-nav a.active {
  color: var(--brand-deep);
  background: color-mix(in srgb, var(--glow) 16%, transparent);
  border-color: var(--border);
}
.admin-main {
  padding: 1.15rem 1rem 2.5rem;
  width: min(1100px, 100%);
  margin-inline: auto;
}
@media (min-width: 980px) {
  .admin-shell { grid-template-columns: 250px 1fr; }
  .admin-side { display: flex; position: sticky; top: 0; height: 100dvh; }
  .admin-top { display: none; }
  .admin-main { padding: 1.75rem 1.75rem 3rem; }
}

.admin-page-title {
  display: flex; flex-wrap: wrap; align-items: flex-end;
  justify-content: space-between; gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.admin-page-title h1 { font-size: clamp(1.4rem, 3vw, 1.85rem); }
.admin-page-title p { margin: 0.25rem 0 0; color: var(--muted); }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
@media (min-width: 720px) {
  .kpi-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 980px) {
  .kpi-grid { grid-template-columns: repeat(6, 1fr); }
}
.kpi {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem 0.95rem;
  box-shadow: var(--shadow);
}
.kpi span { display: block; color: var(--muted); font-size: 0.78rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; }
.kpi strong { display: block; margin-top: 0.35rem; font-family: var(--font-display); font-size: 1.55rem; }

.admin-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.15rem 1.2rem;
  box-shadow: var(--shadow);
  margin-top: 1rem;
}
.admin-card h2 { font-size: 1.1rem; margin: 0 0 0.85rem; }
.admin-actions {
  display: grid;
  gap: 0.65rem;
}
@media (min-width: 720px) {
  .admin-actions { grid-template-columns: repeat(2, 1fr); }
}
.admin-action {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--sand) 35%, var(--bg-elevated));
  color: inherit; font-weight: 700;
}
a.admin-action:hover { border-color: color-mix(in srgb, var(--glow) 40%, var(--border)); color: inherit; }
.admin-action span { color: var(--muted); font-size: 0.85rem; font-weight: 600; }

.list-card {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  margin-bottom: 0.55rem;
}
.list-card h3 { margin: 0; font-size: 1rem; }
.list-card .meta { color: var(--muted); font-size: 0.85rem; margin-top: 0.15rem; }
.panel-split {
  display: grid; gap: 1rem;
}
@media (min-width: 900px) {
  .panel-split { grid-template-columns: 1.2fr 0.9fr; align-items: start; }
}
.form-panel label { margin-bottom: 0.15rem; }
.form-check {
  display: flex !important; flex-direction: row; align-items: center; gap: 0.5rem;
  font-weight: 700;
}
.form-check input { width: auto; min-height: auto; }

/* ========== Deep study UX ========== */
.flip-scene {
  perspective: 1400px;
  min-height: 300px;
}
.flip-card {
  position: relative;
  width: 100%;
  min-height: 300px;
  transform-style: preserve-3d;
  transition: transform .55s cubic-bezier(.22,1,.36,1);
  cursor: pointer;
}
.flip-card.is-flipped { transform: rotateY(180deg); }
.flip-face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    linear-gradient(165deg, color-mix(in srgb, var(--glow) 10%, var(--bg-elevated)), var(--bg-elevated));
  box-shadow: var(--shadow-lg);
  display: grid;
  place-items: center;
  padding: 1.6rem 1.3rem 2.4rem;
  text-align: center;
}
.flip-face.back {
  transform: rotateY(180deg);
  background:
    linear-gradient(165deg, color-mix(in srgb, var(--brand-deep) 12%, var(--bg-elevated)), var(--bg-elevated));
}
.flip-label {
  position: absolute; top: 0.85rem; left: 0.95rem;
  font-size: 0.72rem; font-weight: 900; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted);
}
.deck-toolbar {
  display: flex; flex-wrap: wrap; gap: 0.45rem;
  justify-content: space-between; align-items: center;
  margin-bottom: 0.85rem;
}
.deck-session {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  margin: 0.75rem 0 1rem;
}
.deck-session .pill {
  text-align: center;
  padding: 0.55rem 0.4rem;
  border-radius: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 0.78rem; font-weight: 800;
}
.deck-session .pill strong { display: block; font-size: 1.05rem; font-family: var(--font-display); margin-top: 0.1rem; }
.card-actions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; margin-top: 1rem;
}
.summary-card {
  border-radius: 22px;
  padding: 1.5rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.summary-card h2 { margin-bottom: 0.35rem; }
.summary-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem; margin: 1.15rem 0 1.35rem; text-align: left;
}
.summary-grid div {
  padding: 0.85rem; border-radius: 14px;
  background: color-mix(in srgb, var(--sand) 40%, var(--bg-elevated));
  border: 1px solid var(--border);
}
.summary-grid span { display: block; color: var(--muted); font-size: 0.78rem; font-weight: 800; }
.summary-grid strong { font-family: var(--font-display); font-size: 1.35rem; }

.pdf-card {
  display: grid; gap: 0.75rem;
  padding: 1.1rem 1.15rem;
  border-radius: 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.pdf-card-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem; align-items: start;
}
.pdf-icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, #0c4a44, #14967f);
  color: #fff; font-weight: 900; font-size: 0.75rem;
}
.pdf-card h3 { margin: 0 0 0.25rem; font-size: 1.02rem; }
.pdf-card .meta { color: var(--muted); font-size: 0.82rem; }
.pdf-actions { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.pdf-body { color: var(--muted); font-size: 0.9rem; }

.stats-hero {
  border-radius: 22px;
  padding: 1.35rem 1.25rem;
  margin-bottom: 1rem;
  color: #eef8f6;
  background:
    radial-gradient(ellipse 70% 80% at 100% 0%, rgba(44,188,155,.4), transparent 55%),
    linear-gradient(135deg, #0a3642, #0c4a44 60%, #117a68);
}
.stats-hero h1 { color: #fff; }
.stats-hero p { margin: 0.4rem 0 0; color: rgba(238,248,246,.86); }
.stats-ring-wrap {
  display: grid; place-items: center;
  margin: 0.5rem 0 1rem;
}
.stats-accuracy {
  width: min(220px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid; place-items: center;
  background:
    radial-gradient(circle at center, var(--bg-elevated) 58%, transparent 59%),
    conic-gradient(var(--glow) calc(var(--acc) * 1%), color-mix(in srgb, var(--border) 80%, transparent) 0);
  box-shadow: var(--shadow);
}
.stats-accuracy strong {
  font-family: var(--font-display);
  font-size: 2.2rem;
  line-height: 1;
}
.stats-accuracy span { display: block; text-align: center; color: var(--muted); font-size: 0.8rem; font-weight: 800; }
.chart-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
  margin-bottom: 0.85rem;
}
.chart-card h3 { font-size: 0.95rem; margin: 0 0 0.75rem; }
.topic-card {
  display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
  padding: 1.05rem 1.1rem;
  border-radius: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: inherit;
}
a.topic-card:hover { border-color: color-mix(in srgb, var(--glow) 40%, var(--border)); color: inherit; }
.topic-card h3 { margin: 0 0 0.2rem; font-size: 1.02rem; }
.topic-card p { margin: 0; color: var(--muted); font-size: 0.86rem; }

.feature-mosaic {
  display: grid; gap: 0.85rem;
}
@media (min-width: 720px) {
  .feature-mosaic { grid-template-columns: 1.2fr 1fr; grid-template-rows: auto auto; }
  .feature-mosaic .feat:first-child { grid-row: span 2; min-height: 280px; }
}
.feat {
  position: relative; overflow: hidden;
  border-radius: 22px;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  min-height: 140px;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.feat h3 { margin: 0 0 0.35rem; font-size: 1.2rem; }
.feat p { margin: 0; color: var(--muted); }
.feat-a {
  background:
    linear-gradient(160deg, rgba(12,74,68,.92), rgba(20,150,127,.75)),
    var(--brand-deep);
  color: #eef8f6; border: 0;
}
.feat-a p { color: rgba(238,248,246,.85); }
.feat-b {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--glow) 18%, var(--bg-elevated)), var(--bg-elevated));
}
.feat-c {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--brand) 10%, var(--bg-elevated)), var(--bg-elevated));
}
.home-proof {
  display: grid; gap: 0.75rem;
  margin-top: 1.5rem;
}
@media (min-width: 720px) { .home-proof { grid-template-columns: repeat(3, 1fr); } }
.proof-item {
  padding: 1rem 1.05rem;
  border-radius: 16px;
  border: 1px dashed color-mix(in srgb, var(--glow) 35%, var(--border));
  background: color-mix(in srgb, var(--sand) 40%, transparent);
}
.proof-item strong { display: block; font-family: var(--font-display); font-size: 1.35rem; margin-bottom: 0.2rem; }
/* —— Bildirimler (uygulama) —— */
.nt-page {
  padding: 0.2rem 0 1.25rem;
}
.nt-intro {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.nt-intro .hb-kicker {
  display: inline-block;
  margin-bottom: 0.2rem;
}
.nt-intro h1 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display, "Fraunces", Georgia, serif);
  font-size: clamp(1.45rem, 4.5vw, 1.85rem);
  letter-spacing: -0.02em;
  color: var(--hb-text, var(--text));
}
.nt-intro p {
  margin: 0;
  color: var(--hb-mute, var(--muted));
  font-size: 0.9rem;
  font-weight: 550;
}
.nt-hint {
  display: none;
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--hb-mute, var(--muted));
}
@media (pointer: coarse) {
  .nt-hint { display: block; }
}
.nt-empty {
  text-align: center;
  padding: 2.25rem 1.2rem;
  border-radius: 20px;
  border: 1px dashed var(--hb-line, var(--border));
  background: var(--hb-card, var(--bg-elevated));
}
.nt-empty-ico {
  width: 3rem;
  height: 3rem;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin: 0 auto 0.75rem;
  background: color-mix(in srgb, var(--hb-teal, #2dd4bf) 16%, transparent);
  color: var(--hb-teal, #0d9488);
}
.nt-empty h2 {
  margin: 0 0 0.3rem;
  font-size: 1.1rem;
  color: var(--hb-text, var(--text));
}
.nt-empty p {
  margin: 0;
  color: var(--hb-mute, var(--muted));
  font-size: 0.9rem;
}
.nt-list {
  display: grid;
  gap: 0.65rem;
}
.nt-swipe {
  position: relative;
  border-radius: 14px;
  background: transparent;
}
.nt-swipe.is-swiping,
.nt-swipe:has(.nt-card.is-swipe),
.nt-swipe:has(.nt-card.is-dragging) {
  overflow: hidden;
  background: #e11d48;
  border-radius: 14px;
}
.nt-swipe-bg {
  position: absolute;
  inset: 0 0 0 auto;
  width: 92px;
  display: none;
  place-items: center;
  z-index: 0;
}
.nt-swipe:has(.nt-card.is-swipe) .nt-swipe-bg,
.nt-swipe:has(.nt-card.is-dragging) .nt-swipe-bg {
  display: grid;
}
.nt-swipe-del {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  border: 0;
  background: transparent;
  color: #fff;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 800;
  cursor: pointer;
  padding: 0.5rem;
  width: 100%;
  height: 100%;
  justify-content: center;
}
.nt-card {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "head tools"
    "panel panel";
  gap: 0;
  padding: 0;
  border-radius: 14px;
  background: #fff;
  border: 1px solid rgba(13, 92, 84, 0.14);
  box-shadow: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  touch-action: pan-y;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: geometricPrecision;
  transform: none;
  backface-visibility: visible;
}
html.dark .nt-card {
  background: #161e24;
  border-color: rgba(148, 163, 184, 0.16);
}
.nt-card.is-swipe,
.nt-card.is-dragging {
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.nt-card.is-dragging {
  transition: none;
  will-change: transform;
}
.nt-card.is-unread {
  border-color: rgba(13, 148, 136, 0.35);
  background: #fff;
}
html.dark .nt-card.is-unread {
  background: #161e24;
  border-color: rgba(45, 212, 191, 0.28);
}
.nt-card-head {
  grid-area: head;
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  width: 100%;
  margin: 0;
  padding: 0.85rem 0.35rem 0.85rem 0.8rem;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: inherit;
  font: inherit;
  min-width: 0;
}
.nt-chev {
  flex: 0 0 auto;
  width: 1.35rem;
  height: 1.35rem;
  margin-top: 0.1rem;
  display: grid;
  place-items: center;
  color: var(--hb-mute, var(--muted));
  transition: transform 0.18s ease;
}
.nt-card.is-expanded .nt-chev {
  transform: rotate(180deg);
  color: var(--hb-teal, #0d9488);
}
.nt-dot {
  flex: 0 0 auto;
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.45rem;
  border-radius: 999px;
  background: var(--hb-teal, #2dd4bf);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--hb-teal, #2dd4bf) 22%, transparent);
}
.nt-card-copy {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.nt-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.55rem;
}
.nt-title {
  font-size: 0.98rem;
  font-weight: 750;
  letter-spacing: -0.01em;
  color: var(--hb-text, var(--text));
  line-height: 1.35;
}
.nt-card.is-unread .nt-title {
  font-weight: 800;
}
.nt-preview {
  font-size: 0.84rem;
  color: var(--hb-mute, var(--muted));
  font-weight: 550;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nt-card-tools {
  grid-area: tools;
  display: flex;
  align-items: flex-start;
  padding: 0.7rem 0.7rem 0 0;
}
.nt-tool {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 11px;
  border: 1px solid var(--hb-line, var(--border));
  background: color-mix(in srgb, var(--hb-card-2, #f4faf8) 80%, transparent);
  color: var(--hb-mute, var(--muted));
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}
.nt-tool-del:hover,
.nt-tool-del:focus-visible {
  color: #e11d48;
  border-color: color-mix(in srgb, #e11d48 35%, var(--hb-line, var(--border)));
  background: color-mix(in srgb, #e11d48 8%, transparent);
}
.nt-card-panel {
  grid-area: panel;
  padding: 0 0.95rem 0.9rem 2.55rem;
  border-top: 1px solid transparent;
}
.nt-card.is-expanded .nt-card-panel {
  border-top-color: var(--hb-line, var(--border));
  padding-top: 0.75rem;
  margin-top: 0;
}
.nt-body {
  margin: 0;
  color: var(--hb-mute, var(--muted));
  font-size: 0.9rem;
  line-height: 1.5;
  font-weight: 550;
  white-space: pre-wrap;
}
.nt-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
@media (pointer: fine) {
  .nt-swipe-bg { display: none !important; }
  .nt-card {
    transform: none !important;
  }
}
@media (max-width: 520px) {
  .nt-card-panel {
    padding-left: 0.95rem;
  }
}

html.dark .nt-tool {
  background: rgba(255, 255, 255, 0.04);
}
.empty-state {
  text-align: center;
  padding: 2rem 1.25rem;
  border-radius: 20px;
  border: 1px dashed var(--border);
  background: color-mix(in srgb, var(--sand) 30%, var(--bg-elevated));
}
.empty-state h3 { margin: 0 0 0.4rem; }

/* ========== Admin OS (mobile drawer + workbench) ========== */
.admin-shell { position: relative; }
.admin-backdrop {
  display: none; position: fixed; inset: 0; z-index: 70;
  background: rgba(4, 16, 22, 0.55); backdrop-filter: blur(4px);
}
.admin-backdrop.open { display: block; }
.admin-side {
  position: fixed; inset: 0 auto 0 0; width: min(300px, 88vw);
  z-index: 80; transform: translateX(-105%);
  transition: transform .28s cubic-bezier(.22,1,.36,1);
  display: flex !important; flex-direction: column;
  background: linear-gradient(180deg, #071820 0%, #0a2a32 100%);
  border-right: 1px solid rgba(44,188,155,.18);
  box-shadow: 20px 0 60px rgba(0,0,0,.35);
  height: 100dvh; padding: 0;
}
.admin-side.open { transform: translateX(0); }
.admin-side-head {
  display: flex; align-items: center; gap: 0.55rem; flex-wrap: wrap;
  padding: 1.1rem 1rem; border-bottom: 1px solid rgba(255,255,255,.08);
}
.admin-side .brand { color: #fff; margin: 0; flex: 1; }
.admin-badge {
  font-size: 0.68rem; font-weight: 900; letter-spacing: .06em;
  padding: 0.2rem 0.5rem; border-radius: 999px;
  background: rgba(44,188,155,.2); color: #6ee0c4;
}
.admin-close {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid rgba(255,255,255,.12); background: transparent; color: #fff; cursor: pointer;
}
.admin-side-nav {
  display: grid;
  gap: 0.2rem;
  padding: 0.75rem;
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-gutter: stable;
}
.admin-side-nav a {
  display: block; padding: 0.75rem 0.9rem; border-radius: 12px;
  color: rgba(215,236,232,.85); font-weight: 700;
}
.admin-side-nav a.active, .admin-side-nav a:hover {
  background: rgba(44,188,155,.16); color: #fff;
}
.admin-side .side-foot {
  margin-top: auto; padding: 1rem; display: grid; gap: 0.45rem;
  border-top: 1px solid rgba(255,255,255,.08);
  flex-shrink: 0;
}
.admin-side .side-foot a { color: rgba(215,236,232,.8); font-weight: 700; font-size: 0.9rem; }
.admin-content { min-width: 0; }
.admin-topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.8rem 1rem;
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.admin-burger {
  width: 42px; height: 42px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-elevated);
  display: grid; gap: 5px; place-content: center; cursor: pointer; padding: 0;
}
.admin-burger span {
  display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--text);
}
.admin-top-title { font-weight: 800; font-size: 0.95rem; line-height: 1.2; }
.admin-top-sub { color: var(--muted); font-size: 0.75rem; font-weight: 700; }
.admin-top, .admin-top-nav { display: none !important; }

@media (min-width: 980px) {
  .admin-shell { grid-template-columns: 260px 1fr; }
  .admin-backdrop { display: none !important; }
  .admin-side {
    position: sticky; transform: none !important;
    width: auto; box-shadow: none;
  }
  .admin-close, .admin-burger { display: none; }
  .admin-topbar { display: none; }
}

.type-tabs {
  display: flex; gap: 0.4rem; overflow-x: auto; margin-bottom: 1rem;
  padding-bottom: 0.15rem; -webkit-overflow-scrolling: touch;
}
.type-tabs a {
  flex: 0 0 auto;
  padding: 0.55rem 0.9rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-elevated);
  color: var(--text); font-weight: 800; font-size: 0.82rem;
}
.type-tabs a.active {
  background: linear-gradient(135deg, #0c4a44, #14967f); color: #fff; border-color: transparent;
}
.admin-workbench {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.work-tabs {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--sand) 35%, var(--bg-elevated));
}
.work-tabs button {
  border: 0; background: transparent; padding: 0.85rem 0.4rem;
  font-weight: 800; font-size: 0.82rem; color: var(--muted); cursor: pointer;
}
.work-tabs button.active {
  color: var(--brand-deep);
  box-shadow: inset 0 -2px 0 var(--glow);
  background: var(--bg-elevated);
}
.admin-workbench > div[x-show] { padding: 1rem; }
.filter-bar {
  display: grid; gap: 0.55rem; margin-bottom: 1rem;
}
@media (min-width: 720px) {
  .filter-bar { grid-template-columns: 1fr 1fr auto; align-items: center; }
}
.filter-bar input, .filter-bar select {
  min-height: 44px; margin: 0;
}
.pager {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 0.65rem; margin-top: 1.15rem; padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.pager-info { font-weight: 800; color: var(--muted); font-size: 0.88rem; }
.admin-item-card { align-items: flex-start; }
.fc-bulk-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.85rem;
  margin: 0 0 0.9rem;
  padding: 0.75rem 0.9rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}
.fc-bulk-left {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.75rem;
  min-width: 0;
}
.fc-bulk-check {
  margin: 0 !important;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}
.fc-bulk-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: transparent;
}
.fc-bulk-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
}
.fc-bulk-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.fc-row-check {
  display: grid;
  place-items: center;
  padding: 0.15rem 0.25rem 0 0;
  cursor: pointer;
  flex-shrink: 0;
}
.fc-row-check input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: #0d9488;
}
.admin-item-card.is-selected {
  border-color: color-mix(in srgb, #0d9488 40%, var(--border));
  background: color-mix(in srgb, #0d9488 6%, transparent);
}
.bulk-help { margin-top: 1rem; border-top: 1px solid var(--border); padding-top: 0.85rem; }
.bulk-help summary { cursor: pointer; font-weight: 800; }
.bulk-help-body { margin-top: 0.65rem; color: var(--muted); font-size: 0.9rem; }
.bulk-help pre {
  background: #0a2a32; color: #d7ece8; padding: 0.85rem; border-radius: 12px;
  overflow: auto; font-size: 0.8rem;
}
.bulk-file-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin: 0 0 0.75rem;
}
.bulk-file-pick {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  padding: 0.75rem 0.85rem;
  border-radius: 14px;
  border: 1.5px dashed var(--hb-line, var(--border));
  background: var(--hb-card-2, rgba(15,23,42,.03));
  font-size: 0.85rem;
  font-weight: 750;
}
.bulk-file-pick input[type="file"] {
  font-size: 0.78rem;
  font-weight: 600;
  width: 100%;
}
@media (max-width: 720px) {
  .bulk-file-row { grid-template-columns: 1fr; }
}