/* ============ DESIGN TOKENS ============ */
:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.3vw, 0.9375rem);
  --text-base: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.4vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1.2rem + 4vw, 4.5rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem;
  --radius-xl: 1rem; --radius-2xl: 1.5rem; --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 680px; --content-default: 1000px; --content-wide: 1240px;

  --font-display: 'Clash Display', 'General Sans', system-ui, sans-serif;
  --font-body: 'General Sans', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* LIGHT */
:root, [data-theme='light'] {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-2: #fbfcfd;
  --color-surface-offset: #eef1f5;
  --color-surface-dynamic: #e5e9ef;
  --color-divider: #e2e6ec;
  --color-border: #d5dae2;

  --color-text: #12161d;
  --color-text-muted: #5a6472;
  --color-text-faint: #9aa3b0;
  --color-text-inverse: #f7f9fc;

  --color-primary: #1f5fff;
  --color-primary-hover: #1749d6;
  --color-primary-active: #1039ac;
  --color-primary-soft: #e7eeff;

  --color-accent: #06b6a4;      /* verified / score teal-green */
  --color-accent-soft: #d6f5f0;

  --color-gold: #e0a100;
  --color-warning: #c2660b;

  --shadow-sm: 0 1px 2px rgba(18, 22, 29, 0.05), 0 1px 3px rgba(18, 22, 29, 0.04);
  --shadow-md: 0 4px 14px rgba(18, 22, 29, 0.08);
  --shadow-lg: 0 18px 48px rgba(18, 22, 29, 0.12);

  --grid-line: rgba(18, 22, 29, 0.045);
}

/* DARK */
[data-theme='dark'] {
  --color-bg: #0b0e13;
  --color-surface: #12161d;
  --color-surface-2: #161b23;
  --color-surface-offset: #1a2029;
  --color-surface-dynamic: #232b36;
  --color-divider: #202632;
  --color-border: #2b3340;

  --color-text: #e7ebf1;
  --color-text-muted: #97a1b0;
  --color-text-faint: #5f6b7a;
  --color-text-inverse: #0b0e13;

  --color-primary: #5b8bff;
  --color-primary-hover: #7aa1ff;
  --color-primary-active: #9bb8ff;
  --color-primary-soft: #182543;

  --color-accent: #2dd4bf;
  --color-accent-soft: #0f2e2b;

  --color-gold: #f2c14e;
  --color-warning: #e08c3a;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.45);
  --shadow-lg: 0 20px 52px rgba(0,0,0,0.55);

  --grid-line: rgba(255, 255, 255, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0b0e13; --color-surface: #12161d; --color-surface-2: #161b23;
    --color-surface-offset: #1a2029; --color-surface-dynamic: #232b36;
    --color-divider: #202632; --color-border: #2b3340;
    --color-text: #e7ebf1; --color-text-muted: #97a1b0; --color-text-faint: #5f6b7a;
    --color-text-inverse: #0b0e13; --color-primary: #5b8bff; --color-primary-hover: #7aa1ff;
    --color-primary-active: #9bb8ff; --color-primary-soft: #182543; --color-accent: #2dd4bf;
    --color-accent-soft: #0f2e2b; --color-gold: #f2c14e; --color-warning: #e08c3a;
    --grid-line: rgba(255,255,255,0.04);
  }
}

/* ============ LAYOUT PRIMITIVES ============ */
.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.wrap-narrow { max-width: var(--content-default); }
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.section-sm { padding-block: clamp(var(--space-10), 5vw, var(--space-16)); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  display: inline-flex; align-items: center; gap: var(--space-2);
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: 0.5; }

/* ============ TYPOGRAPHY ============ */
.display { font-family: var(--font-display); font-weight: 600; line-height: 1.04; letter-spacing: -0.02em; }
h1.display { font-size: var(--text-3xl); }
h2.section-title { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 600; letter-spacing: -0.02em; }
h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }
.lead { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 60ch; line-height: 1.55; }
.muted { color: var(--color-text-muted); }
.faint { color: var(--color-text-faint); }
.mono { font-family: var(--font-mono); }

/* ============ HEADER ============ */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: var(--space-6); }
.brand { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--color-text); text-decoration: none; font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); letter-spacing: -0.01em; }
.brand svg { color: var(--color-primary); flex: none; }
.brand .brand-sub { color: var(--color-text-faint); font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 400; letter-spacing: 0.04em; }
.nav { display: flex; align-items: center; gap: var(--space-1); }
.nav a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); font-weight: 500; padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); }
.nav a:hover { color: var(--color-text); background: var(--color-surface-offset); }
.nav a.active { color: var(--color-primary); }
.header-actions { display: flex; align-items: center; gap: var(--space-2); }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border-radius: var(--radius-md); color: var(--color-text-muted); border: 1px solid transparent; }
.icon-btn:hover { background: var(--color-surface-offset); color: var(--color-text); }
.menu-toggle { display: none; }

@media (max-width: 860px) {
  .nav { position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    background: var(--color-surface); border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4); gap: var(--space-1); box-shadow: var(--shadow-lg);
    transform: translateY(-120%); transition: transform 260ms cubic-bezier(0.16,1,0.3,1); }
  .nav.open { transform: translateY(0); }
  .nav a { padding: var(--space-3) var(--space-4); font-size: var(--text-base); }
  .menu-toggle { display: grid; }
}

/* ============ BUTTONS ============ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-weight: 550; font-size: var(--text-sm); padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md); text-decoration: none; border: 1px solid transparent; white-space: nowrap; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-lg { padding: var(--space-4) var(--space-6); font-size: var(--text-base); }

/* ============ HERO ============ */
.hero { position: relative; overflow: hidden; padding-block: clamp(var(--space-20), 12vw, var(--space-32)); }
.hero-grid-bg { position: absolute; inset: 0; z-index: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%); }
.hero-inner { position: relative; z-index: 1; text-align: center; max-width: 860px; margin-inline: auto; }
.hero h1 { margin-block: var(--space-6) var(--space-5); }
.hero .lead { margin-inline: auto; text-align: center; font-size: var(--text-lg); }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: center; margin-top: var(--space-8); }
.hero-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(var(--space-6), 5vw, var(--space-16)); margin-top: var(--space-16); }
.hero-stat { text-align: center; }
.hero-stat .num { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; color: var(--color-text); font-variant-numeric: tabular-nums; }
.hero-stat .lbl { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-faint); margin-top: var(--space-1); }

/* ============ CARDS / GRID ============ */
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); }
.card-link { text-decoration: none; color: inherit; display: block; }
.card-link:hover { border-color: var(--color-primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.cat-card { display: flex; flex-direction: column; gap: var(--space-3); min-height: 100%; }
.cat-card .cat-icon { width: 46px; height: 46px; border-radius: var(--radius-md); display: grid; place-items: center; background: var(--color-primary-soft); color: var(--color-primary); }
.cat-card h3 { font-size: var(--text-lg); }
.cat-card p { color: var(--color-text-muted); font-size: var(--text-sm); }
.cat-card .cat-meta { margin-top: auto; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.04em; padding-top: var(--space-3); }

/* ============ INDUSTRY GROUPS ============ */
.group-block { margin-bottom: var(--space-12); }
.group-block:last-child { margin-bottom: 0; }
.group-head { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.group-title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; }
.group-blurb { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 68ch; margin-bottom: var(--space-5); }
.group-featured { position: relative; border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-10) var(--space-8) var(--space-8);
  margin-bottom: var(--space-16);
  background: linear-gradient(135deg, var(--color-primary-soft), transparent 60%); }
.group-featured .group-head { margin-bottom: var(--space-3); }
.group-featured .group-blurb { margin-bottom: var(--space-8); }
.group-featured .group-title { font-size: var(--text-2xl); }
@media (max-width: 640px) {
  .group-featured { padding: var(--space-6) var(--space-5) var(--space-5); }
}

/* ============ SCORE BADGE ============ */
.score { display: inline-flex; align-items: baseline; gap: 2px; font-family: var(--font-display); font-weight: 600; font-variant-numeric: tabular-nums; }
.score .max { font-size: 0.7em; color: var(--color-text-faint); font-weight: 500; }
.score-chip { display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full);
  background: var(--color-accent-soft); color: var(--color-accent); font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600; }
.stars { display: inline-flex; gap: 1px; color: var(--color-gold); }
.stars svg { width: 15px; height: 15px; }

.badge { display: inline-flex; align-items: center; gap: var(--space-2); padding: 3px var(--space-3); border-radius: var(--radius-full);
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.03em; }
.badge-top { background: linear-gradient(135deg, var(--color-primary), color-mix(in oklab, var(--color-primary) 60%, var(--color-accent))); color: #fff; }
.badge-neutral { background: var(--color-surface-offset); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.badge-verified { background: var(--color-accent-soft); color: var(--color-accent); }

/* ============ RANKED TOOL ROW ============ */
.tool-row { display: grid; grid-template-columns: 48px 1fr auto; gap: var(--space-5); align-items: center;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-5) var(--space-6); text-decoration: none; color: inherit; }
.tool-row:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.tool-row.featured { border-color: color-mix(in oklab, var(--color-primary) 55%, var(--color-border)); box-shadow: 0 0 0 1px color-mix(in oklab, var(--color-primary) 30%, transparent); }
.rank-num { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; color: var(--color-text-faint); font-variant-numeric: tabular-nums; text-align: center; }
.tool-main { min-width: 0; }
.tool-main .tool-name { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.tool-main .tool-name h3 { font-size: var(--text-lg); }
.tool-main .tool-desc { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-1); }
.tool-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.tag { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-muted); background: var(--color-surface-offset); border: 1px solid var(--color-divider); padding: 2px var(--space-2); border-radius: var(--radius-sm); }
.tool-score-col { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: var(--space-1); }
.tool-score-col .big { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; color: var(--color-accent); font-variant-numeric: tabular-nums; line-height: 1; }
.tool-score-col .sub { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }

@media (max-width: 620px) {
  .tool-row { grid-template-columns: 40px 1fr; }
  .tool-score-col { grid-column: 2; align-items: flex-start; text-align: left; flex-direction: row; align-items: baseline; gap: var(--space-3); }
}

/* ============ COMPARISON TABLE ============ */
.table-scroll { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-xl); background: var(--color-surface); }
table.compare { min-width: 720px; font-size: var(--text-sm); }
table.compare th, table.compare td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--color-divider); vertical-align: middle; }
table.compare thead th { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-faint); font-weight: 600; position: sticky; top: 0; background: var(--color-surface-2); z-index: 1; }
table.compare tbody tr:last-child td { border-bottom: none; }
table.compare tbody tr:hover { background: var(--color-surface-offset); }
table.compare td.name { font-weight: 600; }
table.compare .cell-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.check { color: var(--color-accent); }
.dash { color: var(--color-text-faint); }

/* ============ PRODUCT PAGE ============ */
.product-hero { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
.pill-row { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.proscons { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-5); }
.pc-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); }
.pc-card h4 { font-family: var(--font-display); font-size: var(--text-base); display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-4); }
.pc-card ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.pc-card li { display: flex; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.5; }
.pc-card li svg { flex: none; margin-top: 3px; }
.pros h4 { color: var(--color-accent); } .cons h4 { color: var(--color-warning); }

.spec-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-4); }
.spec { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); }
.spec .k { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-faint); }
.spec .v { font-size: var(--text-base); font-weight: 550; margin-top: var(--space-2); color: var(--color-text); }

.rating-bars { display: flex; flex-direction: column; gap: var(--space-4); }
.rbar { display: grid; grid-template-columns: 140px 1fr 52px; gap: var(--space-4); align-items: center; font-size: var(--text-sm); }
.rbar .track { display: block; height: 8px; background: var(--color-surface-dynamic); border-radius: var(--radius-full); overflow: hidden; }
.rbar .fill { display: block; height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); border-radius: var(--radius-full); }
.rbar .val { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; color: var(--color-text-muted); }
@media (max-width: 520px){ .rbar { grid-template-columns: 100px 1fr 44px; gap: var(--space-3); } }

/* demo callout */
.demo-box { background: linear-gradient(135deg, var(--color-primary-soft), var(--color-surface)); border: 1px solid color-mix(in oklab, var(--color-primary) 30%, var(--color-border));
  border-radius: var(--radius-xl); padding: var(--space-6); display: flex; align-items: center; gap: var(--space-5); flex-wrap: wrap; }
.demo-box .demo-num { font-family: var(--font-mono); font-size: var(--text-lg); font-weight: 600; color: var(--color-primary); letter-spacing: 0.02em; }

/* callout / info */
.callout { border-left: 3px solid var(--color-primary); background: var(--color-surface); border-radius: var(--radius-md); padding: var(--space-5); font-size: var(--text-sm); color: var(--color-text-muted); }

/* breadcrumb */
.crumbs { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-5); }
.crumbs a { color: var(--color-text-muted); text-decoration: none; }
.crumbs a:hover { color: var(--color-primary); }
.crumbs span.sep { opacity: 0.5; }

/* section head */
.section-head { max-width: 640px; margin-bottom: var(--space-10); }
.section-head h2 { margin-block: var(--space-4) var(--space-3); }
.section-head p { color: var(--color-text-muted); }
.center { text-align: center; margin-inline: auto; }

/* filter chips */
.chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip { font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 500; padding: var(--space-2) var(--space-4); border-radius: var(--radius-full);
  border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text-muted); cursor: pointer; }
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.chip.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ============ FOOTER ============ */
.footer { border-top: 1px solid var(--color-divider); background: var(--color-surface); margin-top: var(--space-16); }
.footer-inner { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-8); padding-block: var(--space-16) var(--space-10); }
.footer h5 { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.footer ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); }
.footer a:hover { color: var(--color-primary); }
.footer .foot-brand p { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 34ch; margin-top: var(--space-4); }
.footer-bottom { border-top: 1px solid var(--color-divider); padding-block: var(--space-6); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); font-size: var(--text-xs); color: var(--color-text-faint); font-family: var(--font-mono); }
@media (max-width: 780px){ .footer-inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px){ .footer-inner { grid-template-columns: 1fr; } }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms cubic-bezier(0.16,1,0.3,1), transform 600ms cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* utilities */
.stack-6 > * + * { margin-top: var(--space-6); }
.stack-4 > * + * { margin-top: var(--space-4); }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.divider { height: 1px; background: var(--color-divider); border: none; margin-block: var(--space-12); }

/* AEO: last-updated stamp + FAQ */
.updated-stamp { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-4); font-variant-numeric: tabular-nums; }
.updated-stamp time { font-weight: 500; color: var(--color-text); }
.section-head.center .updated-stamp { text-align: center; }
.faq-section .section-head { margin-inline: auto; text-align: center; }
.faq-section .section-head .eyebrow { justify-content: center; }
.faq-item { padding: var(--space-6); }
.faq-item h3 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; letter-spacing: -0.01em; margin-bottom: var(--space-3); line-height: 1.25; }
.faq-item p { color: var(--color-text-muted); line-height: 1.6; margin: 0; }