/* ============================================================
   QuillCheck — Parchment & Ink Design System  v2
   Fonts: Cinzel Decorative (logo) · Cinzel (display/nav)
          Playfair Display (headings) · EB Garamond (body)
   New: Ink-drop checkmark logo · Mobile-first responsive
        Base size bumped to 18px (~2pt increase)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700;900&family=Cinzel+Decorative:wght@400;700;900&family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,600&family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&display=swap');

/* ---- RESET ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---- ROOT TOKENS ---- */
:root {
  --parchment:       #F4ECD8;
  --parchment-dark:  #E8DCC0;
  --parchment-deep:  #D9C9A3;
  --ink:             #1B1B1B;
  --ink-faded:       #3A3530;
  --oxblood:         #5C1A1B;
  --oxblood-light:   #7A2324;
  --oxblood-glow:    rgba(92, 26, 27, 0.15);
  --gold:            #C4A747;
  --gold-light:      #D4B95A;
  --gold-muted:      #9E863A;
  --navy:            #1E2A38;
  --forest:          #1D3B2A;
  --muted-text:      #6B5D4E;

  --font-logo:       'Cinzel Decorative', 'Georgia', serif;
  --font-display:    'Cinzel', 'Georgia', serif;
  --font-heading:    'Playfair Display', 'Georgia', serif;
  --font-body:       'EB Garamond', 'Garamond', 'Georgia', serif;

  --surface:         #FAF4E6;
  --surface-raised:  #FDF8EE;
  --border:          rgba(196, 167, 71, 0.30);
  --border-strong:   rgba(196, 167, 71, 0.55);

  --shadow-sm:    0 1px 4px rgba(27,27,27,0.09), 0 0 0 1px rgba(196,167,71,0.07);
  --shadow-md:    0 4px 18px rgba(27,27,27,0.13), 0 1px 0 rgba(196,167,71,0.10);
  --shadow-lg:    0 10px 40px rgba(27,27,27,0.17), 0 2px 0 rgba(196,167,71,0.13);
  --shadow-inset: inset 0 1px 4px rgba(27,27,27,0.09);

  /* Base bumped from 16px → 18px */
  font-size: 18px;
}

/* ---- BASE ---- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--parchment);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.78;
  min-height: 100vh;
  overflow-x: hidden;

  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='400' height='400' filter='url(%23n)' opacity='0.032'/%3E%3C/svg%3E"),
    repeating-linear-gradient(
      0deg, transparent, transparent 30px,
      rgba(196,167,71,0.035) 30px, rgba(196,167,71,0.035) 31px
    ),
    linear-gradient(135deg, #F9F1DC 0%, #F4ECD8 45%, #EEE3C8 100%);
}

/* ---- LOGO ---- */
.logo {
  font-family: var(--font-logo);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  line-height: 1;
  text-shadow: 1px 1px 0 rgba(196,167,71,0.25);
  user-select: none;
}

.logo span {
  color: var(--oxblood);
}

/* ---- NAVIGATION ---- */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 2.5rem;
  border-bottom: 1px solid var(--border-strong);
  background: linear-gradient(180deg, #FDF8EE 0%, rgba(253,248,238,0.94) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 12px rgba(27,27,27,0.07), 0 1px 0 rgba(196,167,71,0.22);
}

nav::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-muted), transparent);
  opacity: 0.42;
  pointer-events: none;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  align-items: center;
}

nav a {
  font-family: var(--font-display);
  font-size: 0.64rem;
  font-weight: 600;
  color: var(--muted-text);
  text-decoration: none;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: color 0.22s ease;
  position: relative;
  white-space: nowrap;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0; right: 0;
  height: 1px;
  background: var(--oxblood);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

nav a:hover { color: var(--oxblood); }
nav a:hover::after { transform: scaleX(1); }

.btn-nav {
  background: var(--oxblood) !important;
  color: var(--parchment) !important;
  padding: 0.5rem 1.3rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.16em !important;
  border: 1px solid var(--oxblood-light) !important;
  box-shadow: 0 2px 8px rgba(92,26,27,0.28), inset 0 1px 0 rgba(255,255,255,0.10) !important;
  transition: all 0.22s ease !important;
}
.btn-nav::after { display: none !important; }
.btn-nav:hover {
  background: var(--oxblood-light) !important;
  box-shadow: 0 4px 14px rgba(92,26,27,0.38), inset 0 1px 0 rgba(255,255,255,0.12) !important;
  transform: translateY(-1px) !important;
}

/* ---- HERO ---- */
.hero {
  max-width: 860px;
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
  text-align: center;
  position: relative;
}

.hero::before {
  content: '❧';
  display: block;
  font-size: 1.8rem;
  color: var(--gold);
  margin-bottom: 1rem;
  opacity: 0.65;
}

.hero-tag {
  display: inline-block;
  border: 1px solid var(--border-strong);
  color: var(--muted-text);
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 0.38rem 1.3rem;
  margin-bottom: 2rem;
}
.hero-tag::before, .hero-tag::after {
  content: '✦';
  margin: 0 0.55rem;
  color: var(--gold);
  font-size: 0.55rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.4rem;
  text-shadow: 1px 2px 0 rgba(196,167,71,0.14);
}

.hero h1 em {
  font-style: italic;
  color: var(--oxblood);
  position: relative;
}
.hero h1 em::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--oxblood), transparent);
  opacity: 0.36;
}

.hero p {
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--muted-text);
  max-width: 560px;
  margin: 0 auto 3rem;
  line-height: 1.92;
}

/* ---- SCAN FORM ---- */
.scan-form {
  display: flex;
  max-width: 680px;
  margin: 0 auto;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  box-shadow: var(--shadow-md), var(--shadow-inset);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
}
.scan-form::before {
  content: '';
  position: absolute;
  inset: -4px;
  border: 1px solid var(--border);
  pointer-events: none;
}
.scan-form:focus-within {
  border-color: var(--oxblood);
  box-shadow: var(--shadow-lg), 0 0 0 3px var(--oxblood-glow);
}

.scan-form input[type="url"],
.scan-form input[type="text"] {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  padding: 1rem 1.3rem;
  letter-spacing: 0.01em;
}
.scan-form input[type="url"]::placeholder,
.scan-form input[type="text"]::placeholder {
  color: var(--muted-text);
  font-style: italic;
  opacity: 0.65;
}

.scan-form button {
  flex-shrink: 0;
  background: var(--oxblood);
  color: var(--parchment);
  border: none;
  border-left: 1px solid var(--oxblood-light);
  padding: 1rem 1.8rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
  white-space: nowrap;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.10);
}
.scan-form button:hover  { background: var(--oxblood-light); }
.scan-form button:active { transform: scale(0.98); }

/* ---- RESULT CARD ---- */
.result-wrap {
  max-width: 860px;
  margin: 3rem auto;
  padding: 0 1.5rem;
  animation: fadeUp 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-card {
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  padding: 2.5rem;
  position: relative;
  box-shadow: var(--shadow-lg);
}
.result-card::before,
.result-card::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--gold-muted);
  border-style: solid;
  opacity: 0.55;
}
.result-card::before { top: 8px;    left: 8px;  border-width: 1px 0 0 1px; }
.result-card::after  { bottom: 8px; right: 8px; border-width: 0 1px 1px 0; }

.result-url {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--muted-text);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  word-break: break-all;
}
.result-url span {
  color: var(--oxblood);
  font-style: normal;
  font-weight: 600;
}

.score-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.score-box {
  border: 1px solid var(--border);
  padding: 1.8rem 1.4rem;
  text-align: center;
  background: rgba(244,236,216,0.35);
  position: relative;
  overflow: hidden;
}
.score-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-muted), transparent);
  opacity: 0.45;
}

.score-box .label {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-text);
  margin-bottom: 0.8rem;
}

.score-box .value {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 4.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.score-box .verdict {
  margin-top: 0.6rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--muted-text);
}

.gauge-wrap { margin: 1.6rem 0; }

.gauge-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--muted-text);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.gauge-track {
  height: 7px;
  background: rgba(27,27,27,0.07);
  border: 1px solid var(--border);
  overflow: hidden;
}

.gauge-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--oxblood), var(--gold));
  transition: width 1.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--muted-text);
}
.meta-row span {
  color: var(--ink);
  font-style: normal;
  font-weight: 600;
}

/* ---- ERROR ---- */
.error-wrap { max-width: 860px; margin: 2rem auto; padding: 0 1.5rem; }
.error-card {
  padding: 1.2rem 1.8rem;
  border: 1px solid var(--oxblood);
  background: rgba(92,26,27,0.055);
  color: var(--oxblood);
  font-family: var(--font-body);
  font-size: 1rem;
  font-style: italic;
}

/* ---- RANKINGS ---- */
.rankings {
  max-width: 860px;
  margin: 4rem auto;
  padding: 0 1.5rem 5rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 1rem;
  position: relative;
}
.section-head::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-muted), transparent);
  opacity: 0.38;
}

.section-head h2 {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--ink);
}
.section-head small {
  font-family: var(--font-body);
  color: var(--muted-text);
  font-size: 0.9rem;
  font-style: italic;
}

/* Horizontal scroll wrapper for table on mobile */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 0.94rem;
  background: var(--surface-raised);
}

thead th {
  text-align: left;
  color: var(--muted-text);
  font-family: var(--font-display);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-strong);
  background: rgba(196,167,71,0.06);
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid rgba(196,167,71,0.12);
  transition: background 0.14s ease;
}
tbody tr:hover { background: rgba(92,26,27,0.035); }

tbody td {
  padding: 0.9rem 1rem;
  vertical-align: middle;
}

.rank-num {
  color: var(--gold-muted);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-style: italic;
  width: 2.5rem;
  opacity: 0.7;
}

.rank-url {
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink-faded);
}
.rank-url a { color: inherit; text-decoration: none; transition: color 0.2s; }
.rank-url a:hover { color: var(--oxblood); }

.rank-score {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
}

.pill {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-family: var(--font-display);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  opacity: 0.75;
}

.empty-state {
  text-align: center;
  color: var(--muted-text);
  padding: 4rem 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-style: italic;
}
.empty-state::before {
  content: '✦  ✦  ✦';
  display: block;
  font-style: normal;
  color: var(--gold-muted);
  margin-bottom: 1rem;
  letter-spacing: 0.6em;
  opacity: 0.55;
}

/* ---- PRICING ---- */
.pricing {
  max-width: 980px;
  margin: 0 auto;
  padding: 5rem 1.5rem 6rem;
  border-top: 1px solid var(--border-strong);
  position: relative;
}
.pricing::before {
  content: '§';
  position: absolute;
  top: -1.15rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--parchment);
  padding: 0 1rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--gold);
  opacity: 0.65;
}

.pricing h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.55rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.pricing .sub {
  text-align: center;
  color: var(--muted-text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-style: italic;
  margin-bottom: 3.5rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.plan {
  background: var(--surface);
  padding: 2.2rem 1.6rem;
  position: relative;
  transition: background 0.2s ease;
  border-right: 1px solid var(--border-strong);
}
.plan:last-child { border-right: none; }
.plan:hover { background: var(--surface-raised); }

.plan.featured {
  background: var(--oxblood);
  border-right: 1px solid rgba(92,26,27,0.45);
  z-index: 1;
  box-shadow: -4px 0 22px rgba(92,26,27,0.14), 4px 0 22px rgba(92,26,27,0.14);
}
.plan.featured:hover { background: var(--oxblood-light); }

.plan-tag {
  position: absolute;
  top: 0; right: 1.2rem;
  transform: translateY(-50%);
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.22rem 0.85rem;
  font-weight: 700;
}

.plan-name {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-text);
  margin-bottom: 1rem;
}
.plan.featured .plan-name { color: rgba(244,236,216,0.6); }

.plan-price {
  font-family: var(--font-heading);
  font-size: 2.7rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.35rem;
  color: var(--ink);
}
.plan.featured .plan-price { color: var(--parchment); }

.plan-price sup { font-size: 1.1rem; vertical-align: top; margin-top: 0.45rem; }
.plan-price sub { font-size: 0.78rem; color: var(--muted-text); font-family: var(--font-body); }
.plan.featured .plan-price sub { color: rgba(244,236,216,0.5); }

.plan-checks {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--gold-muted);
  margin: 0.9rem 0 1.6rem;
}
.plan.featured .plan-checks { color: var(--gold-light); }

.plan-features {
  list-style: none;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--muted-text);
  line-height: 2.15;
}
.plan.featured .plan-features { color: rgba(244,236,216,0.68); }
.plan-features li::before { content: '— '; color: var(--gold-muted); }
.plan.featured .plan-features li::before { color: var(--gold-light); }

.plan-btn {
  display: block;
  margin-top: 2rem;
  padding: 0.78rem;
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  color: var(--ink-faded);
  transition: all 0.2s ease;
  cursor: pointer;
  background: transparent;
}
.plan-btn:hover {
  border-color: var(--oxblood);
  color: var(--oxblood);
  background: rgba(92,26,27,0.04);
}
.plan.featured .plan-btn {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
  box-shadow: 0 2px 10px rgba(196,167,71,0.28);
}
.plan.featured .plan-btn:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  box-shadow: 0 4px 16px rgba(196,167,71,0.38);
}

/* ---- FOOTER ---- */
footer {
  border-top: 1px solid var(--border-strong);
  padding: 1.8rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--muted-text);
  background: linear-gradient(0deg, rgba(232,220,192,0.28) 0%, transparent 100%);
}

/* ---- UTILITIES ---- */
::selection { background: rgba(92,26,27,0.18); color: var(--ink); }
::-webkit-scrollbar       { width: 8px; }
::-webkit-scrollbar-track { background: var(--parchment-dark); }
::-webkit-scrollbar-thumb { background: var(--gold-muted); }
::-webkit-scrollbar-thumb:hover { background: var(--oxblood); }

/* ====================================================
   RESPONSIVE — Mobile-first breakpoints
   ==================================================== */

/* Tablet ≤ 768px */
@media (max-width: 768px) {
  :root { font-size: 17px; }

  nav { padding: 0.85rem 1.4rem; }
  .logo { font-size: 1.25rem; }
  .nav-links { gap: 1.2rem; }
  .nav-links a:not(.btn-nav) { display: none; }
  .btn-nav { padding: 0.45rem 1rem !important; }

  .hero { padding: 3.5rem 1.5rem 3rem; }
  .hero h1 { font-size: clamp(2rem, 8vw, 3.2rem); }
  .hero p  { font-size: 1.05rem; }

  .scan-form input[type="url"],
  .scan-form input[type="text"] { font-size: 0.95rem; }
  .scan-form button { padding: 1rem 1.2rem; }

  .result-card { padding: 1.8rem 1.4rem; }

  .pricing-grid { grid-template-columns: 1fr 1fr; }
  .plan { border-right: none; border-bottom: 1px solid var(--border-strong); }
  .plan:nth-child(odd) { border-right: 1px solid var(--border-strong); }
  .plan.featured { box-shadow: none; }

  footer { padding: 1.5rem 1.4rem; }
}

/* Mobile ≤ 480px */
@media (max-width: 480px) {
  :root { font-size: 16px; }

  nav { padding: 0.8rem 1rem; }
  .logo { font-size: 1.1rem; }

  .hero { padding: 2.8rem 1rem 2.5rem; }
  .hero::before { font-size: 1.3rem; }
  .hero h1 { font-size: clamp(1.85rem, 9vw, 2.7rem); line-height: 1.13; }
  .hero p  { font-size: 0.98rem; margin-bottom: 2rem; }
  .hero-tag { font-size: 0.54rem; padding: 0.3rem 0.9rem; letter-spacing: 0.14em; }

  /* Stack form vertically */
  .scan-form { flex-direction: column; max-width: 100%; }
  .scan-form input[type="url"],
  .scan-form input[type="text"] {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--border-strong);
    font-size: 1rem;
  }
  .scan-form button {
    border-left: none;
    padding: 0.9rem 1rem;
    font-size: 0.68rem;
    text-align: center;
    letter-spacing: 0.18em;
  }

  /* Single column scores */
  .score-row { grid-template-columns: 1fr; gap: 1rem; }
  .score-box .value { font-size: clamp(2.6rem, 12vw, 3.6rem); }

  .result-card { padding: 1.4rem 1rem; }
  .result-card::before, .result-card::after { display: none; }
  .meta-row { gap: 0.7rem 1.5rem; font-size: 0.82rem; }

  .pricing-grid { grid-template-columns: 1fr; }
  .plan { border-right: none; }
  .plan:nth-child(odd) { border-right: none; }
  .plan-price { font-size: 2.4rem; }

  .rankings { padding: 0 1rem 4rem; }
  .section-head h2 { font-size: 1.25rem; }

  footer { flex-direction: column; text-align: center; padding: 1.4rem 1rem; }
}

/* XS ≤ 360px */
@media (max-width: 360px) {
  .hero h1 { font-size: 1.75rem; }
  .logo { font-size: 1.15rem; }
}

/* ====================================================
   DARK MODE TOGGLE BUTTON
   ==================================================== */

.dark-toggle {
  position: fixed;
  bottom: 1.8rem;
  right: 1.8rem;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  color: var(--muted-text);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(27,27,27,0.18), 0 1px 0 rgba(196,167,71,0.2);
  transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1),
              background 0.25s ease,
              box-shadow 0.25s ease,
              border-color 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dark-toggle:hover {
  transform: scale(1.12);
  background: var(--parchment-dark);
  border-color: var(--oxblood);
  box-shadow: 0 6px 24px rgba(92,26,27,0.22), 0 1px 0 rgba(196,167,71,0.3);
  color: var(--oxblood);
}

.dark-toggle:active {
  transform: scale(0.95);
}

.dark-toggle-icon {
  display: block;
  line-height: 1;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

.dark-toggle:hover .dark-toggle-icon {
  transform: rotate(20deg);
}

/* ====================================================
   DARK MODE — html.dark overrides
   Palette: deep navy-ink bg, warm ivory text,
            oxblood accents, gold rules
   ==================================================== */

html.dark {
  --parchment:       #181510;
  --parchment-dark:  #121008;
  --parchment-deep:  #0E0C07;
  --ink:             #EDE4CC;
  --ink-faded:       #C8BC9E;
  --muted-text:      #8C7D65;
  --surface:         #1E1A13;
  --surface-raised:  #241F16;
  --border:          rgba(196, 167, 71, 0.18);
  --border-strong:   rgba(196, 167, 71, 0.32);
  --oxblood-glow:    rgba(122, 35, 36, 0.25);

  /* Shadows deepen in dark mode */
  --shadow-sm:    0 1px 4px rgba(0,0,0,0.4), 0 0 0 1px rgba(196,167,71,0.06);
  --shadow-md:    0 4px 18px rgba(0,0,0,0.5), 0 1px 0 rgba(196,167,71,0.08);
  --shadow-lg:    0 10px 40px rgba(0,0,0,0.6), 0 2px 0 rgba(196,167,71,0.10);
  --shadow-inset: inset 0 1px 4px rgba(0,0,0,0.35);
}

html.dark body {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='400' height='400' filter='url(%23n)' opacity='0.055'/%3E%3C/svg%3E"),
    repeating-linear-gradient(
      0deg, transparent, transparent 30px,
      rgba(196,167,71,0.03) 30px, rgba(196,167,71,0.03) 31px
    ),
    linear-gradient(135deg, #1C1810 0%, #181510 45%, #141208 100%);
}

/* Nav */
html.dark nav {
  background: linear-gradient(180deg, #1E1A13 0%, rgba(30,26,19,0.96) 100%);
  box-shadow: 0 2px 12px rgba(0,0,0,0.4), 0 1px 0 rgba(196,167,71,0.15);
}

/* Hero decorative mark */
html.dark .hero::before {
  opacity: 0.45;
}

/* Scan form */
html.dark .scan-form input[type="url"],
html.dark .scan-form input[type="text"] {
  color: var(--ink);
}

/* Result card */
html.dark .result-card {
  background: var(--surface-raised);
}

html.dark .score-box {
  background: rgba(30,26,19,0.6);
}

/* Table */
html.dark table {
  background: var(--surface-raised);
}

html.dark thead th {
  background: rgba(196,167,71,0.04);
}

html.dark tbody tr:hover {
  background: rgba(122,35,36,0.08);
}

/* Pricing */
html.dark .plan {
  background: var(--surface);
}
html.dark .plan:hover {
  background: var(--surface-raised);
}
html.dark .plan.featured {
  background: var(--oxblood);
}
html.dark .plan.featured:hover {
  background: var(--oxblood-light);
}

/* Footer */
html.dark footer {
  background: linear-gradient(0deg, rgba(12,10,6,0.4) 0%, transparent 100%);
}

/* Pricing section mark */
html.dark .pricing::before {
  background: var(--parchment);
}

/* Dark toggle button in dark mode */
html.dark .dark-toggle {
  background: var(--surface-raised);
  border-color: var(--border-strong);
  color: var(--gold-muted);
}
html.dark .dark-toggle:hover {
  background: var(--surface);
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 6px 24px rgba(0,0,0,0.5), 0 1px 0 rgba(196,167,71,0.2);
}

/* Scrollbar in dark mode */
html.dark ::-webkit-scrollbar-track { background: var(--parchment-dark); }
html.dark ::-webkit-scrollbar-thumb { background: var(--gold-muted); }
html.dark ::-webkit-scrollbar-thumb:hover { background: var(--oxblood); }

/* Selection in dark mode */
html.dark ::selection {
  background: rgba(196,167,71,0.22);
  color: var(--ink);
}

/* ====================================================
   TF-IDF PAGE — Formula cards, corpus stats, table
   ==================================================== */

/* Formula explanation card */
.formula-card {
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  padding: 2rem 2.2rem;
  position: relative;
  box-shadow: var(--shadow-md);
  margin-bottom: 0.5rem;
}

.formula-card::before,
.formula-card::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--gold-muted);
  border-style: solid;
  opacity: 0.5;
}
.formula-card::before { top: 8px;    left: 8px;  border-width: 1px 0 0 1px; }
.formula-card::after  { bottom: 8px; right: 8px; border-width: 0 1px 1px 0; }

.formula-card-head {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-text);
  margin-bottom: 1.4rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border);
}

.formula-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.formula-block {
  padding: 1.2rem 1rem;
  border: 1px solid var(--border);
  background: rgba(244,236,216,0.25);
  position: relative;
}
.formula-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--oxblood), transparent);
  opacity: 0.25;
}

.formula-label {
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 0.7rem;
}

.formula-expr {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 0.7rem;
  line-height: 1.4;
}

.formula-note {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--muted-text);
  line-height: 1.7;
  font-style: italic;
}

/* Corpus stats chips */
.corpus-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}

.stat-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--border);
  background: rgba(92,26,27,0.04);
  min-width: 110px;
  text-align: center;
  gap: 0.25rem;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--oxblood);
  line-height: 1;
}

.stat-lbl {
  font-family: var(--font-display);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-text);
}

/* TF-IDF table specific styles */
.tfidf-table .tfidf-val {
  font-family: 'Courier New', 'Courier', monospace;
  font-size: 0.82rem;
  color: var(--ink-faded);
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.tfidf-table .tfidf-idf {
  color: var(--navy);
}

html.dark .tfidf-table .tfidf-idf {
  color: var(--gold-muted);
}

.tfidf-table .tfidf-score.nonzero {
  font-weight: 700;
  color: var(--oxblood);
}

html.dark .tfidf-table .tfidf-score.nonzero {
  color: var(--gold-light);
}

.tfidf-table .tfidf-count {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--ink);
  text-align: center;
}

/* Rows with zero score (term not found) */
.tfidf-table tr.row-zero {
  opacity: 0.5;
}

.tfidf-footnote {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-style: italic;
  color: var(--muted-text);
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* Active nav link for TF-IDF page */
.tfidf-section { margin-top: 0; }

/* Dark mode overrides for formula card */
html.dark .formula-card {
  background: var(--surface-raised);
}
html.dark .formula-block {
  background: rgba(30,26,19,0.5);
}
html.dark .stat-chip {
  background: rgba(196,167,71,0.04);
}

/* Responsive */
@media (max-width: 768px) {
  .formula-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .corpus-stats {
    gap: 0.7rem;
  }
  .stat-chip {
    min-width: 90px;
    padding: 0.6rem 0.8rem;
  }
}

@media (max-width: 480px) {
  .formula-card { padding: 1.2rem 1rem; }
  .corpus-stats { flex-direction: column; }
  .stat-chip { flex-direction: row; justify-content: space-between; text-align: left; }
  .stat-num { font-size: 1.1rem; }
}