/* crystal-shell-v1 — iPhone-style glass shell for Talkhees concept UI */
/* glossy-3d-icons-v1 — emoji chrome replaced by glossy 3D SVG marks */
/* raised-plate-v1 — squircle plates and metal lift, Talkhees green and gold only */
/* raised-type-v1 — display text with a top light and a soft green shadow */

body.concept-ui {
  --glass-bg: rgba(255, 255, 255, 0.38);
  --glass-bg-strong: rgba(255, 255, 255, 0.52);
  --glass-border: rgba(255, 255, 255, 0.72);
  --glass-border-soft: rgba(255, 255, 255, 0.45);
  --glass-blur: blur(22px) saturate(1.45);
  --glass-shadow: 0 20px 50px rgba(8, 28, 24, 0.16), 0 4px 14px rgba(8, 28, 24, 0.08);
  --glass-inset: inset 0 1px 0 rgba(255, 255, 255, 0.82), inset 0 -1px 0 rgba(255, 255, 255, 0.12);
  --gold-glow: rgba(226, 200, 120, 0.42);
  direction: rtl;
  text-align: right;
  background:
    radial-gradient(ellipse 120% 80% at 100% 0%, rgba(217, 239, 140, 0.35), transparent 55%),
    radial-gradient(ellipse 90% 70% at 0% 100%, rgba(31, 82, 70, 0.12), transparent 50%),
    var(--th-cream-warm);
}

.glossy-icon {
  display: block;
  width: 28px;
  height: 28px;
  overflow: visible;
}

.concept-emoji,
.concept-bottom-nav .nav-icon,
.concept-subject-emoji,
.concept-passkey-emoji,
.concept-privacy-emoji {
  line-height: 0;
  font-style: normal;
}

.concept-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .concept-glass,
  body.concept-ui.auth-body .auth-card,
  body.concept-ui.library-body .subject-card,
  .concept-bottom-nav {
    background: rgba(255, 255, 255, 0.92);
  }
}


body.concept-ui::before,
body.concept-ui::after {
  content: '';
  pointer-events: none;
  position: fixed;
  z-index: 0;
  opacity: 0.4;
}

body.concept-ui::before {
  width: 220px;
  height: 220px;
  left: -40px;
  bottom: calc(var(--th-nav-height) + 40px);
  background: radial-gradient(circle at 30% 30%, var(--th-gold-bright), transparent 65%);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath fill='%23000' d='M50 0 61 39 100 39 69 62 79 100 50 77 21 100 31 62 0 39 39 39Z'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
}

body.concept-ui::after {
  width: 280px;
  height: 320px;
  right: -60px;
  bottom: 80px;
  background: linear-gradient(145deg, transparent 40%, rgba(31, 82, 70, 0.1));
  border-radius: 50% 0 0 50%;
}

body.concept-ui > *:not(.concept-bottom-nav):not(#conceptSheet) {
  position: relative;
  z-index: 1;
}

/* ——— Auth ——— */
body.concept-ui.auth-body {
  min-height: 100dvh;
  padding-bottom: calc(24px + var(--th-safe-bottom));
  overflow-x: hidden;
}

body.concept-ui.auth-body > header,
body.concept-ui.auth-body .about-platform,
body.concept-ui.auth-body .auth-footer {
  display: none;
}

body.concept-ui.auth-body .auth-layout {
  display: block;
  max-width: min(480px, 100%);
  margin: 0 auto;
  padding: 0;
  gap: 0;
}

body.concept-ui.auth-body .auth-intro {
  background: linear-gradient(165deg, rgba(10, 36, 31, 0.92) 0%, rgba(21, 61, 54, 0.88) 55%, rgba(26, 74, 64, 0.85) 100%);
  color: #f4f7ef;
  text-align: center;
  padding: calc(28px + env(safe-area-inset-top, 0px)) 20px 92px;
  border-radius: 0 0 42% 42% / 0 0 14% 14%;
  position: relative;
}

body.concept-ui.auth-body .auth-intro .eyebrow,
body.concept-ui.auth-body .auth-intro .auth-benefits,
body.concept-ui.auth-body .auth-intro .auth-stats,
body.concept-ui.auth-body .auth-intro > p {
  display: none;
}

body.concept-ui h1,
body.concept-ui h2,
body.concept-ui h3 {
  text-shadow:
    0 -1px 0 rgba(255, 250, 235, 0.98),
    0 2px 0 rgba(10, 36, 31, 0.16),
    0 10px 18px rgba(10, 36, 31, 0.16);
}

body.concept-ui.auth-body .auth-intro h1 {
  font-size: clamp(24px, 5.8vw, 32px);
  line-height: 1.55;
  color: #fff;
  margin: 14px 0 0;
  font-weight: 600;
  text-shadow:
    0 -1px 0 rgba(226, 200, 120, 0.55),
    0 2px 0 rgba(8, 24, 20, 0.35),
    0 12px 20px rgba(0, 0, 0, 0.28);
}

body.concept-ui.auth-body .auth-intro h1 em {
  font-style: normal;
  color: var(--th-lime);
}

body.concept-ui.auth-body .auth-intro h1 em::after {
  display: none;
}

.concept-emblem {
  width: 76px;
  height: 76px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--glass-inset), 0 12px 32px rgba(0, 0, 0, 0.22);
  display: grid;
  place-content: center;
  font-family: var(--th-font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--th-lime);
}

.concept-emblem::after {
  content: '';
  display: block;
  width: 48px;
  height: 6px;
  margin: 10px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold-glow), transparent);
  border-radius: 4px;
}

body.concept-ui.auth-body .auth-card {
  margin: -58px 14px 0;
  padding: 20px 18px 24px;
  border-radius: var(--th-radius-shell);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
}

body.concept-ui.auth-body .auth-card-heading {
  display: none;
}

body.concept-ui.auth-body .auth-tabs {
  background: rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--th-radius-pill);
  padding: 5px;
  margin: 0 0 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

body.concept-ui.auth-body .auth-tabs button {
  font-size: 13px;
  font-weight: 600;
  min-height: 44px;
  border-radius: var(--th-radius-pill);
  color: var(--th-muted);
}

body.concept-ui.auth-body .auth-tabs button[aria-selected='true'] {
  background: rgba(255, 255, 255, 0.72);
  color: var(--th-green-deep);
  box-shadow: var(--glass-inset), 0 6px 16px rgba(217, 239, 140, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.85);
}

body.concept-ui.auth-body form input,
body.concept-ui.auth-body .password-wrap {
  border-radius: var(--th-radius-pill);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  min-height: 50px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  text-align: right;
  direction: rtl;
}

body.concept-ui.auth-body .password-wrap input {
  border-radius: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

body.concept-ui.auth-body .form-primary {
  border-radius: var(--th-radius-pill);
  background: linear-gradient(180deg, rgba(31, 82, 70, 0.92), rgba(10, 36, 31, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.25);
  font-weight: 600;
  min-height: 52px;
  margin-top: 6px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 14px 28px rgba(10, 36, 31, 0.25);
}

body.concept-ui.auth-body #authPanel {
  display: flex;
  flex-direction: column;
  gap: 0;
}

body.concept-ui.auth-body #authForm {
  order: 1;
}

body.concept-ui.auth-body #recoverLink {
  order: 2;
}

body.concept-ui.auth-body #backLogin {
  order: 3;
}

body.concept-ui.auth-body #conceptOrDivider {
  order: 8;
}

body.concept-ui.auth-body #passkeyLogin {
  order: 9;
}

body.concept-ui.auth-body #passkeySupport {
  order: 10;
}

body.concept-ui.auth-body .passkey-login {
  width: 100%;
  margin-bottom: 8px;
  padding: 12px 16px;
  border-radius: var(--th-radius-pill);
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--th-green-deep);
  font-size: 13px;
  font-weight: 600;
  min-height: 50px;
  box-shadow: var(--glass-inset), 0 10px 24px rgba(10, 36, 31, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

body.concept-ui.auth-body .passkey-login::before {
  content: none;
}

body.concept-ui.auth-body .passkey-support {
  font-size: 11px;
  text-align: center;
  margin-bottom: 10px;
  line-height: 1.7;
}

body.concept-ui.auth-body .text-button {
  color: var(--th-gold-muted);
  font-weight: 600;
}

body.concept-ui.auth-body .auth-privacy {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  text-align: center;
  border: 0;
  margin-top: 14px;
  padding-top: 0;
  font-size: 11px;
  line-height: 1.8;
}

body.concept-ui.auth-body .concept-privacy-emoji .glossy-icon {
  width: 22px;
  height: 22px;
  margin-top: 2px;
}

.concept-or-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0 10px;
  color: var(--th-muted);
  font-size: 12px;
}

.concept-or-divider::before,
.concept-or-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
}

/* ——— Library ——— */
body.concept-ui.library-body {
  padding-bottom: calc(var(--th-nav-height) + 28px + var(--th-safe-bottom));
  overflow-x: hidden;
}

body.concept-ui.library-body > header,
body.concept-ui.library-body > footer,
body.concept-ui.library-body .library-illustration,
body.concept-ui.library-body .library-start,
body.concept-ui.library-body .about-platform {
  display: none;
}

body.concept-ui.library-body .concept-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: row-reverse;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 16px 6px;
  max-width: min(520px, 100%);
  margin: 0 auto;
  gap: 10px;
}

.concept-header-commands {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.concept-header-commands .concept-icon-btn {
  width: 42px;
  height: 42px;
}

.concept-sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(10, 36, 31, 0.46);
}

.concept-sheet[hidden] {
  display: none;
}

.concept-sheet-panel {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: min(320px, 88vw);
  overflow: auto;
  padding: calc(16px + env(safe-area-inset-top, 0px)) 16px calc(20px + var(--th-safe-bottom));
  background:
    linear-gradient(180deg, rgba(253, 252, 247, 0.98), #f3efe3 42%);
  border-left: 1px solid rgba(226, 200, 120, 0.72);
  box-shadow: -16px 0 40px rgba(10, 36, 31, 0.28);
}

.concept-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.concept-sheet-head h2 {
  margin: 0;
  font-size: 22px;
  color: var(--th-green-deep);
}

.concept-sheet-close {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid rgba(226, 200, 120, 0.72);
  background: linear-gradient(180deg, #1f5246, #0a241f);
  color: var(--th-gold-bright);
  font-size: 22px;
  line-height: 1;
}

.concept-sheet-row,
.concept-notice {
  width: 100%;
  margin: 0 0 8px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(226, 200, 120, 0.45);
  background: rgba(255, 255, 255, 0.72);
  color: var(--th-green-deep);
  text-align: right;
  font: inherit;
  font-weight: 700;
  text-shadow: 0 -1px 0 rgba(255, 250, 235, 0.9), 0 1px 0 rgba(10, 36, 31, 0.16);
  box-shadow: inset 0 1px 0 rgba(253, 252, 247, 0.8), 0 8px 16px rgba(10, 36, 31, 0.08);
}

.concept-notice {
  font-weight: 600;
  line-height: 1.7;
}

.concept-icon-btn {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border: 1px solid rgba(226, 200, 120, 0.72);
  border-radius: 16px;
  background:
    linear-gradient(165deg, rgba(253, 252, 247, 0.2), transparent 40%),
    linear-gradient(180deg, #1f5246 0%, #0a241f 78%);
  color: var(--th-gold-bright);
  font-size: 18px;
  display: grid;
  place-content: center;
  box-shadow:
    0 1px 0 rgba(226, 200, 120, 0.55),
    0 12px 18px rgba(10, 36, 31, 0.32),
    0 0 16px rgba(196, 163, 90, 0.42),
    inset 0 1px 0 rgba(253, 252, 247, 0.42),
    inset 0 -10px 14px rgba(0, 0, 0, 0.34);
}

body.concept-ui.library-body .library-hero {
  display: block;
  max-width: min(520px, 100%);
  margin: 0 auto;
  padding: 6px 16px 16px;
}

body.concept-ui.library-body .library-welcome {
  font-size: 13px;
  color: var(--th-muted);
  margin: 0;
}

body.concept-ui.library-body .library-hero h1 {
  font-size: clamp(26px, 6.5vw, 34px);
  line-height: 1.35;
  margin: 8px 0 8px;
}

body.concept-ui.library-body .library-description {
  font-size: 14px;
  line-height: 1.85;
  max-width: 36em;
}

body.concept-ui.library-body .subjects-section {
  max-width: min(520px, 100%);
  margin: 0 auto 24px;
  padding: 0 16px;
}

body.concept-ui.library-body .section-heading,
body.concept-ui.library-body .subjects-intro,
body.concept-ui.library-body .library-note {
  display: none;
}

body.concept-ui.library-body .subjects-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  perspective: 920px;
  padding-bottom: 8px;
}

body.concept-ui.library-body .subject-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 16px 16px 16px 14px;
  border-radius: calc(var(--th-radius-card) + 4px);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
  transform: rotateX(2.5deg);
  transform-origin: center top;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

body.concept-ui.library-body .subject-card:active {
  transform: rotateX(0deg) scale(0.99);
}

body.concept-ui.library-body .subject-cover {
  display: none;
}

body.concept-ui.library-body .subject-content {
  padding: 0;
  grid-column: 1;
  min-width: 0;
}

body.concept-ui.library-body .subject-eyebrow {
  font-size: 11px;
  color: var(--th-muted);
}

body.concept-ui.library-body .subject-content h3 {
  font-size: 20px;
  margin: 2px 0 6px;
  color: var(--th-green);
  line-height: 1.35;
}

body.concept-ui.library-body .subject-content > p {
  font-size: 12px;
  min-height: 0;
  margin: 0;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

body.concept-ui.library-body .subject-meta {
  flex-wrap: wrap;
  margin-top: 8px;
  font-size: 10px;
  gap: 6px;
}

body.concept-ui.library-body .subject-meta span {
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--glass-border-soft);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

body.concept-ui.library-body .subject-progress {
  border: 0;
  padding: 0;
  margin-top: 10px;
}

body.concept-ui.library-body .subject-progress progress {
  height: 6px;
  border-radius: var(--th-radius-pill);
  accent-color: var(--th-green-mid);
}

body.concept-ui.library-body .subject-action {
  display: none;
}

body.concept-ui.library-body .subject-card::after {
  content: none;
  display: none;
}

.concept-subject-emoji {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  width: 68px;
  height: 68px;
  display: grid;
  place-content: center;
  border-radius: 22px;
  background:
    linear-gradient(165deg, rgba(253, 252, 247, 0.2), transparent 40%),
    linear-gradient(180deg, #1f5246 0%, #0a241f 78%);
  border: 1px solid rgba(226, 200, 120, 0.72);
  box-shadow:
    0 1px 0 rgba(226, 200, 120, 0.55),
    0 14px 22px rgba(10, 36, 31, 0.3),
    0 0 18px rgba(196, 163, 90, 0.4),
    inset 0 1px 0 rgba(253, 252, 247, 0.42),
    inset 0 -12px 16px rgba(0, 0, 0, 0.34);
  flex-shrink: 0;
}

.concept-subject-emoji .glossy-icon,
.concept-passkey-emoji .glossy-icon,
.concept-icon-btn .glossy-icon {
  width: 40px;
  height: 40px;
}

.concept-passkey-emoji .glossy-icon,
.concept-icon-btn .glossy-icon {
  width: 28px;
  height: 28px;
}

/* Bottom navigation — crystal glass */
.concept-bottom-nav {
  position: fixed;
  right: 0;
  left: 0;
  bottom: 0;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  height: calc(var(--th-nav-height) + var(--th-safe-bottom));
  padding: 8px 10px calc(6px + var(--th-safe-bottom));
  background: rgba(255, 255, 255, 0.32);
  backdrop-filter: blur(26px) saturate(1.5);
  -webkit-backdrop-filter: blur(26px) saturate(1.5);
  border-top: 1px solid var(--glass-border);
  border-radius: 22px 22px 0 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: 4px;
  z-index: 40;
  box-shadow: 0 -12px 40px rgba(8, 28, 24, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.65);
  direction: rtl;
}

.concept-bottom-nav a,
.concept-bottom-nav button {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--th-muted);
  font-size: 9px;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding: 0 2px 2px;
  font-family: inherit;
}

.concept-bottom-nav .nav-label {
  font-family: var(--th-font-display);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--th-green);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  text-shadow:
    0 -1px 0 rgba(226, 200, 120, 0.8),
    0 1px 0 rgba(10, 36, 31, 0.34),
    0 3px 4px rgba(10, 36, 31, 0.16);
}

.concept-bottom-nav .is-active .nav-label {
  color: var(--th-green-deep);
  text-shadow:
    0 -1px 0 rgba(226, 200, 120, 0.95),
    0 1px 0 rgba(10, 36, 31, 0.4),
    0 8px 14px rgba(154, 123, 60, 0.38);
}

.concept-bottom-nav .nav-icon-wrap {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-content: center;
  background:
    linear-gradient(165deg, rgba(253, 252, 247, 0.18), transparent 42%),
    linear-gradient(180deg, #245e50 0%, #0a241f 80%);
  border: 1px solid rgba(226, 200, 120, 0.62);
  box-shadow:
    0 1px 0 rgba(226, 200, 120, 0.45),
    0 10px 16px rgba(10, 36, 31, 0.28),
    0 0 12px rgba(196, 163, 90, 0.32),
    inset 0 1px 0 rgba(253, 252, 247, 0.36),
    inset 0 -8px 12px rgba(0, 0, 0, 0.32);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.concept-bottom-nav .nav-icon {
  display: grid;
  place-content: center;
}

.concept-bottom-nav .nav-icon .glossy-icon {
  width: 28px;
  height: 28px;
}

.concept-bottom-nav .is-active {
  color: var(--th-green-deep);
}

.concept-bottom-nav .is-active .nav-icon-wrap {
  transform: translateY(-10px) scale(1.08);
  background:
    linear-gradient(165deg, rgba(253, 252, 247, 0.28), transparent 36%),
    linear-gradient(180deg, #2a6b5c 0%, #0a241f 78%);
  box-shadow:
    inset 0 1px 0 rgba(253, 252, 247, 0.55),
    inset 0 -10px 14px rgba(0, 0, 0, 0.32),
    0 0 0 1px rgba(226, 200, 120, 0.85),
    0 16px 28px rgba(10, 36, 31, 0.34),
    0 0 22px rgba(196, 163, 90, 0.62);
}

.concept-bottom-nav .is-active .nav-icon-wrap::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 0%, rgba(226, 200, 120, 0.55), transparent 68%);
  pointer-events: none;
  z-index: -1;
}

.concept-bottom-nav .is-active .nav-icon .glossy-icon {
  width: 30px;
  height: 30px;
}

/* Study / obligations / reading */
body.concept-ui.concept-ui-study,
body.concept-ui.law-body {
  padding-bottom: calc(var(--th-nav-height) + 20px + var(--th-safe-bottom));
  overflow-x: hidden;
}

body.concept-ui:not(.auth-body):not(.library-body) header {
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border-soft);
  box-shadow: 0 8px 24px rgba(10, 36, 31, 0.06);
  flex-wrap: wrap;
  height: auto;
  min-height: 73px;
  padding-top: calc(8px + env(safe-area-inset-top, 0px));
  gap: 8px;
}

body.concept-ui:not(.auth-body):not(.library-body) .header-tools {
  flex-shrink: 0;
}

body.concept-ui:not(.auth-body):not(.library-body) .top-nav {
  flex-wrap: wrap;
  justify-content: flex-start;
}

body.concept-ui:not(.auth-body):not(.library-body) .brand-mark {
  background: rgba(21, 61, 54, 0.88);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset);
}

body.concept-ui .reading-page,
body.concept-ui .chapter-card,
body.concept-ui .about-platform,
body.concept-ui .scope-note,
body.concept-ui .law-exam-download,
body.concept-ui .search-box {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
}

body.concept-ui .app-dialog {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(28px) saturate(1.45);
  -webkit-backdrop-filter: blur(28px) saturate(1.45);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), 0 28px 60px rgba(8, 28, 24, 0.22);
}

body.concept-ui .app-dialog::backdrop {
  background: rgba(10, 36, 31, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

body.concept-ui .install-trigger,
body.concept-ui .account-trigger,
body.concept-ui #theme {
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-soft);
  box-shadow: var(--glass-inset);
}

body.concept-ui .primary,
body.concept-ui .form-primary:not(body.concept-ui.auth-body .form-primary) {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 12px 28px rgba(10, 36, 31, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

body.concept-ui .complete,
body.concept-ui form input,
body.concept-ui .password-wrap {
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-color: var(--glass-border-soft);
}

body.concept-ui .reader-section {
  background: transparent;
}

body.concept-ui .sidebar-inner .chapter-nav a.active,
body.concept-ui .sidebar-inner .chapter-nav a:hover {
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

body.concept-ui.offline-card-wrap .offline-card {
  max-width: min(420px, calc(100% - 32px));
  margin: 12vh auto 0;
  text-align: center;
  padding: 28px 22px;
  border-radius: var(--th-radius-shell);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
}

body.concept-ui .back-top {
  background: rgba(21, 61, 54, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border-soft);
  bottom: calc(var(--th-nav-height) + 12px + var(--th-safe-bottom));
}

@media (max-width: 899px) {
  body.concept-ui:not(.auth-body) .top-nav {
    display: none;
  }

  body.concept-ui:not(.auth-body) header {
    justify-content: space-between;
  }

  body.concept-ui.concept-ui-study .reader-section,
  body.concept-ui.law-body .reader-section {
    display: block;
    padding-left: 16px;
    padding-right: 16px;
  }

  body.concept-ui .reading-page {
    padding: 22px 18px;
    margin-bottom: 16px;
  }

  body.concept-ui .chapter-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  body.concept-ui .hero,
  body.concept-ui .library-hero,
  body.concept-ui .law-hero {
    padding-left: 16px;
    padding-right: 16px;
  }
}

@media (min-width: 900px) {
  body.concept-ui.auth-body > header {
    display: flex;
  }

  body.concept-ui.auth-body .about-platform {
    display: grid;
  }

  body.concept-ui.auth-body .auth-footer {
    display: block;
  }

  body.concept-ui.auth-body .auth-layout {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    max-width: 1150px;
    padding: 65px 25px 45px;
    gap: 90px;
  }

  body.concept-ui.auth-body .auth-intro {
    background: transparent;
    color: inherit;
    text-align: start;
    padding: 0;
    border-radius: 0;
  }

  body.concept-ui.auth-body .auth-intro .eyebrow,
  body.concept-ui.auth-body .auth-intro .auth-benefits,
  body.concept-ui.auth-body .auth-intro .auth-stats,
  body.concept-ui.auth-body .auth-intro > p {
    display: revert;
  }

  body.concept-ui.auth-body .auth-intro h1 {
    color: var(--ink);
    font-size: 49px;
  }

  body.concept-ui.auth-body .auth-card {
    margin: 0;
  }

  body.concept-ui.auth-body .concept-emblem {
    display: none;
  }

  body.concept-ui.library-body > header,
  body.concept-ui.library-body > footer,
  body.concept-ui.library-body .library-illustration,
  body.concept-ui.library-body .library-start,
  body.concept-ui.library-body .about-platform {
    display: revert;
  }

  body.concept-ui.library-body .concept-topbar {
    display: none;
  }

  body.concept-ui.library-body {
    padding-bottom: 0;
  }

  body.concept-ui.library-body .subjects-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    perspective: none;
  }

  body.concept-ui.library-body .subject-card {
    transform: none;
    display: block;
    padding: 0;
  }

  body.concept-ui.library-body .subject-cover {
    display: flex;
  }

  body.concept-ui.library-body .concept-subject-emoji {
    display: none;
  }

  body.concept-ui.library-body .subject-action {
    display: flex;
  }

  body.concept-ui.library-body .section-heading,
  body.concept-ui.library-body .subjects-intro,
  body.concept-ui.library-body .library-note {
    display: revert;
  }

  .concept-bottom-nav {
    display: none;
  }

  body.concept-ui .back-top {
    bottom: 23px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.concept-ui.library-body .subject-card {
    transform: none;
  }

  .concept-bottom-nav .is-active .nav-icon-wrap {
    transform: scale(1.08);
  }
}