/* ═══════════════════════════════════════════════════════════════════════════
   Ensia Web — Design System
   Two themes: Mist (Morandy purple, light, frosted-glass) | Dusk (dark flow)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Fonts ─────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:ital,wght@0,400;0,500;1,400&display=swap');

/* ── Mist theme (default) ──────────────────────────────────────────────── */
:root,
[data-theme="mist"] {
  --c-bg:          #f0edf8;
  --c-bg-deep:     #e8e2f4;
  --c-surface:     rgba(255, 255, 255, 0.65);
  --c-surface-alt: rgba(248, 245, 255, 0.78);
  --c-surface-hi:  rgba(255, 255, 255, 0.88);
  --c-border:      rgba(168, 148, 214, 0.22);
  --c-border-mid:  rgba(168, 148, 214, 0.38);
  --c-border-hi:   rgba(138, 116, 184, 0.55);
  --c-primary:     #8a74b8;
  --c-primary-dk:  #6d5a97;
  --c-accent:      #b5a3d8;
  --c-accent-soft: rgba(138, 116, 184, 0.12);
  --c-glow:        rgba(138, 116, 184, 0.18);
  --c-text-1:      #23193a;
  --c-text-2:      #5e5179;
  --c-text-3:      #9d91b8;
  --c-success:     #5a9e7e;
  --c-danger:      #b05068;
  --c-warn:        #a07040;
  --c-code-bg:     rgba(138, 116, 184, 0.08);
  --c-mesh-a:      rgba(195, 178, 240, 0.50);
  --c-mesh-b:      rgba(220, 205, 255, 0.40);
  --c-mesh-c:      rgba(175, 158, 225, 0.35);
  --c-nav-bg:      rgba(245, 242, 255, 0.82);
  --c-scrollbar:   rgba(138, 116, 184, 0.25);
  --shadow-sm:     0 2px 12px rgba(100, 80, 160, 0.08);
  --shadow-md:     0 6px 24px rgba(100, 80, 160, 0.12), 0 1px 0 rgba(255,255,255,0.7) inset;
  --shadow-lg:     0 16px 48px rgba(100, 80, 160, 0.16), 0 1px 0 rgba(255,255,255,0.7) inset;
  --shadow-glow:   0 0 32px rgba(138, 116, 184, 0.28);
}

/* ── Dusk theme ────────────────────────────────────────────────────────── */
[data-theme="dusk"] {
  --c-bg:          #08060f;
  --c-bg-deep:     #0d0a1c;
  --c-surface:     rgba(18, 12, 32, 0.80);
  --c-surface-alt: rgba(24, 16, 44, 0.85);
  --c-surface-hi:  rgba(30, 20, 55, 0.90);
  --c-border:      rgba(110, 80, 200, 0.18);
  --c-border-mid:  rgba(120, 90, 215, 0.32);
  --c-border-hi:   rgba(130, 100, 225, 0.55);
  --c-primary:     #8b68e4;
  --c-primary-dk:  #6e50c0;
  --c-accent:      #a87ef2;
  --c-accent-soft: rgba(110, 80, 200, 0.18);
  --c-glow:        rgba(110, 80, 200, 0.28);
  --c-text-1:      #ece5ff;
  --c-text-2:      #b2a4d8;
  --c-text-3:      #706090;
  --c-success:     #4a8e6e;
  --c-danger:      #a04060;
  --c-warn:        #906030;
  --c-code-bg:     rgba(110, 80, 200, 0.12);
  --c-mesh-a:      rgba(80, 50, 160, 0.20);
  --c-mesh-b:      rgba(55, 30, 130, 0.16);
  --c-mesh-c:      rgba(35, 15, 100, 0.14);
  --c-nav-bg:      rgba(12, 8, 22, 0.88);
  --c-scrollbar:   rgba(110, 80, 200, 0.22);
  --shadow-sm:     0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-md:     0 6px 24px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255,255,255,0.04) inset;
  --shadow-lg:     0 16px 48px rgba(0, 0, 0, 0.6), 0 1px 0 rgba(255,255,255,0.04) inset;
  --shadow-glow:   0 0 40px rgba(110, 80, 200, 0.35);
}

/* ── Shared tokens ─────────────────────────────────────────────────────── */
:root {
  --radius-xs:  6px;
  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  36px;
  --radius-2xl: 52px;
  --blur-sm:    12px;
  --blur-md:    24px;
  --blur-lg:    40px;
  --spring:       cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:     cubic-bezier(0.0,  0.0,  0.2,  1);
  --ease-smooth:  cubic-bezier(0.4,  0.0,  0.2,  1);
  --ease-fluid:   cubic-bezier(0.23, 1,    0.32, 1);
  --nav-h: 64px;
}

/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
input, select, textarea { font-family: inherit; }
ul, ol { list-style: none; }

/* ── Base ──────────────────────────────────────────────────────────────── */
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--c-bg);
  color: var(--c-text-1);
  line-height: 1.65;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background 0.5s var(--ease-smooth), color 0.4s;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 75% 65% at 12% 55%, var(--c-mesh-a) 0%, transparent 70%),
    radial-gradient(ellipse 65% 55% at 88% 18%, var(--c-mesh-b) 0%, transparent 65%),
    radial-gradient(ellipse 60% 70% at 52% 88%, var(--c-mesh-c) 0%, transparent 60%);
  animation: meshDrift 28s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
  transition: opacity 0.5s;
}

@keyframes meshDrift {
  0%   { transform: scale(1)    translate( 0%,  0%); }
  25%  { transform: scale(1.04) translate( 1%,  2%); }
  50%  { transform: scale(0.98) translate(-2%,  1%); }
  75%  { transform: scale(1.03) translate( 2%, -1%); }
  100% { transform: scale(1.01) translate(-1%,  2%); }
}

/* scrollbar */
::-webkit-scrollbar            { width: 6px; height: 6px; }
::-webkit-scrollbar-track      { background: transparent; }
::-webkit-scrollbar-thumb      { background: var(--c-scrollbar); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover{ background: var(--c-border-hi); }

/* ── Typography ────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--c-text-1);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
p  { color: var(--c-text-2); max-width: 68ch; }

.font-mono { font-family: 'JetBrains Mono', monospace; }
.text-muted { color: var(--c-text-3); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.78rem; }
.font-semibold { font-weight: 600; }

/* ── Layout ────────────────────────────────────────────────────────────── */
.page-wrap {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3.5vw, 2.5rem);
}
.pt-nav { padding-top: calc(var(--nav-h) + 2rem); }
.section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}
.section + .section {
  border-top: 1px solid var(--c-border);
}

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.25rem; }
.flex    { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 0.75rem; }
.gap-md { gap: 1.25rem; }
.gap-lg { gap: 2rem; }
.w-full { width: 100%; }

/* ── Glass card ────────────────────────────────────────────────────────── */
.glass {
  background: var(--c-surface);
  backdrop-filter: blur(var(--blur-md)) saturate(170%);
  -webkit-backdrop-filter: blur(var(--blur-md)) saturate(170%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition:
    transform 0.4s var(--spring),
    box-shadow 0.4s var(--ease-fluid),
    border-color 0.3s;
}
.glass:hover {
  transform: translateY(-3px) scale(1.008);
  border-color: var(--c-border-mid);
  box-shadow: var(--shadow-lg);
}
.glass-alt {
  background: var(--c-surface-alt);
  backdrop-filter: blur(var(--blur-md)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--blur-md)) saturate(150%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.glass-hi {
  background: var(--c-surface-hi);
  backdrop-filter: blur(var(--blur-lg)) saturate(200%);
  -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(200%);
  border: 1px solid var(--c-border-mid);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}
.card-pad  { padding: 1.75rem; }
.card-pad-lg { padding: 2.25rem; }

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6em 1.4em;
  border-radius: var(--radius-md);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all 0.35s var(--spring);
  white-space: nowrap;
}
.btn:active { transform: scale(0.96) !important; }

.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  box-shadow: 0 4px 16px var(--c-glow);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 8px 28px var(--c-glow);
  filter: brightness(1.08);
}

.btn-ghost {
  background: var(--c-accent-soft);
  color: var(--c-primary);
  border: 1px solid var(--c-border-mid);
}
.btn-ghost:hover {
  background: var(--c-surface-hi);
  border-color: var(--c-border-hi);
  transform: translateY(-2px) scale(1.02);
}

.btn-danger {
  background: rgba(176, 80, 104, 0.12);
  color: var(--c-danger);
  border: 1px solid rgba(176, 80, 104, 0.22);
}
.btn-danger:hover {
  background: rgba(176, 80, 104, 0.2);
  transform: translateY(-1px);
}

.btn-sm { padding: 0.4em 0.9em; font-size: 0.82rem; border-radius: var(--radius-sm); }
.btn-icon {
  padding: 0.55em;
  border-radius: var(--radius-sm);
  line-height: 1;
}

/* ── Badge ─────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2em 0.7em;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-primary {
  background: var(--c-accent-soft);
  color: var(--c-primary);
  border: 1px solid var(--c-border-mid);
}
.badge-success {
  background: rgba(90, 158, 126, 0.12);
  color: var(--c-success);
  border: 1px solid rgba(90, 158, 126, 0.22);
}
.badge-danger {
  background: rgba(176, 80, 104, 0.1);
  color: var(--c-danger);
  border: 1px solid rgba(176, 80, 104, 0.2);
}

/* ── Toggle switch ─────────────────────────────────────────────────────── */
.toggle-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
}
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.toggle-track {
  position: absolute;
  inset: 0;
  border-radius: 99px;
  background: var(--c-border-mid);
  transition: background 0.3s var(--ease-smooth);
}
.toggle-switch input:checked + .toggle-track {
  background: var(--c-primary);
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
  transition: transform 0.3s var(--spring);
}
.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(20px);
}

/* ── Slider ─────────────────────────────────────────────────────────────── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.slider-val {
  min-width: 3ch;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  color: var(--c-primary);
  font-weight: 500;
}
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 99px;
  background: linear-gradient(
    to right,
    var(--c-primary) 0%,
    var(--c-primary) var(--pct, 50%),
    var(--c-border-mid) var(--pct, 50%),
    var(--c-border-mid) 100%
  );
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-primary);
  border: 3px solid var(--c-bg);
  box-shadow: 0 0 0 2px var(--c-primary);
  transition: transform 0.2s var(--spring), box-shadow 0.2s;
  cursor: grab;
}
input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.25);
  box-shadow: 0 0 0 4px var(--c-glow);
}
input[type=range]::-webkit-slider-thumb:active { cursor: grabbing; }

/* ── Text inputs ────────────────────────────────────────────────────────── */
.field-input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.65em 0.95em;
  background: var(--c-surface-hi);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-text-1);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s, background-color 0.25s;
}
.field-input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-glow);
  background: var(--c-surface);
}
.field-input.mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

select.field-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a74b8' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2.2rem;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-text-3);
  margin-bottom: 0.25rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

/* ── Tag pills (force_content / skip_value etc.) ───────────────────────── */
.tag-area {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.5rem;
  background: var(--c-surface-hi);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  min-height: 2.5rem;
  align-items: flex-start;
}
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.18em 0.55em 0.18em 0.7em;
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border-mid);
  border-radius: 99px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--c-primary);
  animation: pillPop 0.3s var(--spring);
}
@keyframes pillPop {
  from { transform: scale(0.7); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}
.tag-pill-del {
  border: none;
  background: none;
  cursor: pointer;
  color: var(--c-text-3);
  font-size: 0.9rem;
  line-height: 1;
  padding: 0 0.1rem;
  border-radius: 50%;
  transition: color 0.2s, background 0.2s;
  display: flex;
  align-items: center;
}
.tag-pill-del:hover { color: var(--c-danger); background: rgba(176,80,104,0.1); }
.tag-add-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.tag-add-row .field-input {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
}
.tag-add-row .btn {
  flex-shrink: 0;
  padding: 0.5em 1.1em;
}

/* ── Code / TOML preview ───────────────────────────────────────────────── */
.code-block {
  background: var(--c-code-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--c-text-2);
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
}
.toml-preview {
  max-height: 52vh;
  overflow-y: auto;
  font-size: 0.82rem;
}

/* ── Divider ────────────────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 1.5rem 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: var(--c-nav-bg);
  backdrop-filter: blur(var(--blur-lg)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  transition: background 0.4s, border-color 0.4s;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  gap: 2rem;
}
.nav-logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--c-text-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.75; }
.nav-logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 10px var(--c-glow);
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1);    opacity: 1;   }
  50%       { transform: scale(1.35); opacity: 0.7; }
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  padding: 0.4em 0.9em;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text-2);
  cursor: pointer;
  border: none;
  background: none;
  transition: color 0.25s, background 0.25s;
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.nav-link:hover { color: var(--c-text-1); background: var(--c-accent-soft); }
.nav-link.active {
  color: var(--c-primary);
  background: var(--c-accent-soft);
  font-weight: 600;
}
.nav-right { display: flex; align-items: center; gap: 0.75rem; }

/* Theme toggle pill */
.theme-pill {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--c-surface-alt);
  border: 1px solid var(--c-border-mid);
  border-radius: 99px;
  padding: 3px;
  cursor: pointer;
  transition: border-color 0.3s;
}
.theme-pill:hover { border-color: var(--c-border-hi); }
.theme-btn {
  padding: 0.28em 0.75em;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 600;
  border: none;
  background: none;
  color: var(--c-text-3);
  cursor: pointer;
  transition: all 0.3s var(--spring);
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.theme-btn.active {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 2px 8px var(--c-glow);
}

/* ═══════════════════════════════════════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════════════════════════════════════ */
.hero {
  min-height: 92dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 3rem) 1.5rem 4rem;
  position: relative;
}
.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--c-primary);
  opacity: 0.5;
}
.hero-title {
  background: linear-gradient(135deg, var(--c-text-1) 0%, var(--c-primary) 55%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.25rem;
  letter-spacing: -0.04em;
  animation: fadeUp 0.8s var(--ease-fluid) both;
}
[data-theme="dusk"] .hero-title {
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 50%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--c-text-2);
  max-width: 56ch;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
  animation: fadeUp 0.8s 0.1s var(--ease-fluid) both;
}
.hero-actions {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.2s var(--ease-fluid) both;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--c-text-3);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  animation: fadeUp 1s 0.5s var(--ease-fluid) both;
}
.scroll-arrow {
  width: 20px;
  height: 20px;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(5px); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Hero logo ─────────────────────────────────────────────────────────── */
.hero-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.6s var(--ease-fluid) both;
}
.hero-logo {
  width: clamp(56px, 10vw, 96px);
  height: auto;
  filter: drop-shadow(0 4px 16px var(--c-glow));
}

/* ── Hero citation / contact badges ────────────────────────────────────── */
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.8s 0.15s var(--ease-fluid) both;
}
.badge-link {
  display: inline-flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  border-radius: var(--radius-xs);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s, box-shadow 0.18s;
}
.badge-link:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.badge-doi {
  background: #1d4e89;
  color: #fff;
  border: none;
  border-radius: 0;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.28rem 0.55rem;
}
.badge-doi-val {
  background: #2b7ec9;
  color: #fff;
  border: none;
  border-radius: 0;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.28rem 0.65rem;
  font-family: var(--font-mono);
}
.badge-neutral {
  background: var(--c-surface-alt);
  color: var(--c-text-2);
  border: 1px solid var(--c-border-mid);
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: 0;
  font-family: var(--font-mono);
}

/* Feature cards */
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  transition: transform 0.35s var(--spring), box-shadow 0.35s;
}
.glass:hover .feature-icon {
  transform: scale(1.15) rotate(-4deg);
  box-shadow: 0 4px 16px var(--c-glow);
}

/* Ethics / policy cards */
.policy-section h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}
.policy-section p { max-width: 100%; }
blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 0.75rem 1.25rem;
  margin: 1rem 0;
  background: var(--c-accent-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--c-text-2);
}

/* ═══════════════════════════════════════════════════════════════════════════
   Algorithms Page
   ═══════════════════════════════════════════════════════════════════════════ */
.algo-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  align-items: start;
  padding-top: calc(var(--nav-h) + 2rem);
  min-height: 100dvh;
  padding-bottom: 4rem;
}
@media (max-width: 768px) {
  .algo-layout { grid-template-columns: 1fr; }
  .algo-sidebar { position: static; }
}
.algo-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.algo-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55em 0.85em;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--c-text-2);
  border: none;
  background: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, transform 0.2s var(--spring);
  text-align: left;
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.algo-nav-btn:hover {
  color: var(--c-text-1);
  background: var(--c-accent-soft);
  transform: translateX(3px);
}
.algo-nav-btn.active {
  color: var(--c-primary);
  background: var(--c-accent-soft);
  font-weight: 600;
}
.algo-nav-icon { font-size: 1rem; width: 1.2em; text-align: center; }

.algo-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.algo-header { margin-bottom: 0.5rem; }
.algo-header h2 { margin-bottom: 0.5rem; }
.algo-header p { color: var(--c-text-2); max-width: 70ch; }

.algo-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: 0.85rem;
}

/* Visualization frame */
.vis-frame {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  overflow-x: auto;
}
.vis-frame svg { max-width: 100%; height: auto; }

/* SVG block styles */
.cfg-node       { fill: var(--c-surface-hi); stroke: var(--c-border-hi); stroke-width: 1.5; transition: fill 0.3s; }
.cfg-node-fake  { fill: var(--c-accent-soft); stroke: var(--c-accent); stroke-width: 1.5; stroke-dasharray: 5 3; }
.cfg-node-entry { fill: var(--c-accent-soft); stroke: var(--c-primary); stroke-width: 2; }
.cfg-text       { fill: var(--c-text-2); font-family: 'JetBrains Mono', monospace; font-size: 11px; }
.cfg-text-sm    { fill: var(--c-text-3); font-size: 9.5px; font-style: italic; }
.cfg-edge       { stroke: var(--c-text-3); stroke-width: 1.5; fill: none; }
.cfg-edge-fake  { stroke: var(--c-accent); stroke-width: 1.5; stroke-dasharray: 5 3; fill: none; }
.cfg-edge-true  { stroke: var(--c-success); stroke-width: 1.5; fill: none; }
.cfg-arrow      { fill: var(--c-text-3); }
.cfg-arrow-fake { fill: var(--c-accent); }
.cfg-arrow-true { fill: var(--c-success); }
.cfg-label-edge { fill: var(--c-text-3); font-size: 9px; font-family: 'JetBrains Mono', monospace; }

/* Encryption step animation */
.enc-byte {
  animation: encReveal 0.6s var(--spring) both;
}
@keyframes encReveal {
  from { opacity: 0; transform: translateY(-8px) scale(0.8); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

/* MBA expression */
.mba-expr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--c-text-2);
  background: var(--c-code-bg);
  padding: 0.6em 1em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  margin: 0.35rem 0;
}
.mba-highlight { color: var(--c-primary); font-weight: 500; }

/* Math KaTeX override */
.katex { color: var(--c-text-1); }
.katex-display { overflow-x: auto; padding: 0.5rem 0; }

.math-block {
  background: var(--c-code-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  overflow-x: auto;
  margin: 0.5rem 0;
}

/* Config ref table */
.cfg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.cfg-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  color: var(--c-text-3);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--c-border);
}
.cfg-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-text-2);
  vertical-align: top;
}
.cfg-table td:first-child {
  font-family: 'JetBrains Mono', monospace;
  color: var(--c-primary);
  font-size: 0.82rem;
}
.cfg-table tr:last-child td { border-bottom: none; }
.cfg-table tr:hover td { background: var(--c-accent-soft); }

/* ═══════════════════════════════════════════════════════════════════════════
   Config Editor
   ═══════════════════════════════════════════════════════════════════════════ */
.config-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 2.25rem;
  padding-top: calc(var(--nav-h) + 2rem);
  min-height: 100dvh;
  padding-bottom: 4rem;
  align-items: start;
}
@media (max-width: 1040px) {
  .config-layout { grid-template-columns: minmax(0, 1fr); }
  .config-preview { position: static; }
}
.config-form { display: flex; flex-direction: column; gap: 1.5rem; min-width: 0; }
.config-preview {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Pass section card */
.pass-card {
  background: var(--c-surface);
  backdrop-filter: blur(var(--blur-md)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--blur-md)) saturate(150%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.pass-card:focus-within {
  border-color: var(--c-border-mid);
  box-shadow: 0 4px 20px var(--c-glow);
}
.pass-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.5rem;
  cursor: pointer;
  transition: background 0.2s;
  user-select: none;
}
.pass-card-header:hover { background: var(--c-accent-soft); }
.pass-card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--c-text-1);
}
.pass-card-icon { font-size: 1.1rem; }
.pass-card-body {
  padding: 1.35rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border-top: 1px solid var(--c-border);
}
.pass-disabled .pass-card-body {
  opacity: 0.45;
  pointer-events: none;
}

.config-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}
@media (max-width: 640px) {
  .config-grid-2 { grid-template-columns: minmax(0, 1fr); }
}

/* Toggle Grid */
.toggle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 0.85rem 1.25rem;
  align-items: center;
}

/* Policy card */
.policy-rule-card {
  background: var(--c-surface-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeUp 0.35s var(--spring) both;
}
.policy-rule-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.policy-rule-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.policy-overrides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
}

/* Policy pass sub-section (BCF opts, CSM opts, etc.) */
.policy-sub-section {
  padding: 0.75rem 1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.policy-sub-section .field-label {
  font-size: 0.73rem;
  color: var(--c-text-2);
  font-weight: 600;
  margin-bottom: 0;
}

/* Export bar */
.export-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.copy-feedback {
  font-size: 0.82rem;
  color: var(--c-success);
  animation: fadeUp 0.3s var(--spring);
}

/* Section titles inside config */
.section-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2em 0.75em;
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border-mid);
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 0.75rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--c-border);
  padding: 2.5rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--c-text-3);
  font-size: 0.83rem;
}
.footer-links {
  display: flex;
  gap: 1.25rem;
}
.footer-links a,
.footer-links button,
.footer-link-btn {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: inherit;
  cursor: pointer;
  color: var(--c-text-3);
  text-decoration: none;
  transition: color 0.2s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: none;
}
.footer-links a:hover,
.footer-links button:hover,
.footer-link-btn:hover {
  color: var(--c-primary);
  background: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Theme-Adaptive Benchmark Charts
   ═══════════════════════════════════════════════════════════════════════════ */
.chart-dark { display: none; }
.chart-light { display: block; }

[data-theme="dusk"] .chart-dark { display: block; }
[data-theme="dusk"] .chart-light { display: none; }
[data-theme="mist"] .chart-dark { display: none; }
[data-theme="mist"] .chart-light { display: block; }

.chart-card-img {
  width: 100%;
  border-radius: var(--radius-md, 8px);
  border: 1px solid var(--c-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transition: opacity 0.2s ease;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Utilities
   ═══════════════════════════════════════════════════════════════════════════ */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}
.accent-text { color: var(--c-primary); }
.mt-sm { margin-top: 0.5rem; }
.mt-md { margin-top: 1rem; }
.mt-lg { margin-top: 2rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 1rem; }
.mb-lg { margin-bottom: 2rem; }

/* ═══════════════════════════════════════════════════════════════════════════
   TOML Syntax Highlighting
   ═══════════════════════════════════════════════════════════════════════════ */
.toml-preview .th-comment { color: var(--c-text-3); font-style: italic; }
.toml-preview .th-header  { color: var(--c-primary); font-weight: 700; }
.toml-preview .th-header2 { color: var(--c-accent);  font-weight: 700; }
.toml-preview .th-key     { color: #a87ef2; }
.toml-preview .th-op      { color: var(--c-text-3); }
.toml-preview .th-str     { color: var(--c-success); }
.toml-preview .th-bool    { color: #e8a87c; }
.toml-preview .th-num     { color: #7ec8e3; }
.toml-preview .th-arr     { color: var(--c-text-2); }

/* ═══════════════════════════════════════════════════════════════════════════
   Pipeline steps (home page)
   ═══════════════════════════════════════════════════════════════════════════ */
.pipeline-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.pipeline-step {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface);
  backdrop-filter: blur(var(--blur-sm));
  transition: background 0.2s;
}
.pipeline-step:last-child { border-bottom: none; }
.pipeline-step:hover { background: var(--c-surface-alt); }
.pipeline-n {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--c-primary);
  font-family: 'JetBrains Mono', monospace;
  margin-top: 0.1rem;
}
.pipeline-label {
  font-weight: 600;
  color: var(--c-text-1);
  margin-bottom: 0.2rem;
  font-size: 0.95rem;
}
.pipeline-detail {
  font-size: 0.84rem;
  color: var(--c-text-2);
  line-height: 1.5;
}