/* ===== Design Tokens ===== */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --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-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

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

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
}

:root, [data-theme='light'] {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-surface-2: #f1f4f8;
  --color-surface-offset: #e9edf3;
  --color-divider: #e2e8f0;
  --color-border: #d4dbe5;
  --color-text: #131b2e;
  --color-text-muted: #5a6678;
  --color-text-faint: #9aa6b8;
  --color-text-inverse: #f8f9fb;
  --color-primary: #1b54c4;
  --color-primary-hover: #1542a0;
  --color-primary-active: #103482;
  --color-accent: #e07a2e;
  --color-accent-hover: #c5641d;
  --color-success: #1f8a4c;
  --shadow-sm: 0 1px 2px rgba(19,27,46,0.06);
  --shadow-md: 0 4px 16px rgba(19,27,46,0.08);
  --shadow-lg: 0 16px 40px rgba(19,27,46,0.12);
}

[data-theme='dark'] {
  --color-bg: #0c111d;
  --color-surface: #131a29;
  --color-surface-2: #1a2334;
  --color-surface-offset: #1f293c;
  --color-divider: #232d40;
  --color-border: #2c3850;
  --color-text: #e4e9f2;
  --color-text-muted: #97a3b8;
  --color-text-faint: #5d6b7a;
  --color-text-inverse: #0c111d;
  --color-primary: #5b8def;
  --color-primary-hover: #7aa3f5;
  --color-primary-active: #97b9f8;
  --color-accent: #f0944e;
  --color-accent-hover: #f4a868;
  --color-success: #4caf7a;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0c111d; --color-surface: #131a29; --color-surface-2: #1a2334;
    --color-surface-offset: #1f293c; --color-divider: #232d40; --color-border: #2c3850;
    --color-text: #e4e9f2; --color-text-muted: #97a3b8; --color-text-faint: #5d6b7a;
    --color-text-inverse: #0c111d; --color-primary: #5b8def; --color-primary-hover: #7aa3f5;
    --color-accent: #f0944e; --color-success: #4caf7a;
  }
}

/* ===== Base ===== */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth; scroll-padding-top: var(--space-20); }
body { min-height: 100dvh; line-height: 1.65; font-family: var(--font-body);
  font-size: var(--text-base); color: var(--color-text); background: var(--color-bg);
  transition: background .3s, color .3s; }
img,picture,video,svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
input,button,textarea,select { font: inherit; color: inherit; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); font-weight: 600; }
p,li { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }
::selection { background: rgba(27,84,196,0.2); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) { *,*::before,*::after {
  animation-duration:.01ms !important; transition-duration:.01ms !important; scroll-behavior:auto !important; } }
a,button { transition: color var(--transition-interactive), background var(--transition-interactive),
  border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive); }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; }

/* Scroll reveal: only hides when JS is active (adds .js-reveal to html); never hides without JS */
.js-reveal [data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.js-reveal [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce){ .js-reveal [data-reveal]{ opacity:1; transform:none; } }

/* ===== Layout ===== */
.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.wrap-narrow { max-width: var(--content-narrow); }
.wrap-default { max-width: var(--content-default); }
section { padding-block: clamp(var(--space-12), 7vw, var(--space-24)); }

/* ===== Header ===== */
.header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px); border-bottom: 1px solid var(--color-divider); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6);
  height: 68px; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.brand { display: flex; align-items: center; gap: var(--space-3); font-weight: 700; font-size: var(--text-base); letter-spacing: -0.01em; }
.brand svg { color: var(--color-primary); flex-shrink: 0; }
.brand span b { color: var(--color-accent); }
.nav { display: flex; align-items: center; gap: var(--space-6); }
.nav a { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; }
.nav a:hover { color: var(--color-text); }
.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.theme-toggle { width: 38px; height: 38px; display: grid; place-items: center; border-radius: var(--radius-full);
  color: var(--color-text-muted); border: 1px solid var(--color-border); }
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }
.menu-btn { display: none; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md); font-size: var(--text-sm); font-weight: 600; }
.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-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-hover); transform: translateY(-1px); }
.btn-ghost { border: 1px solid var(--color-border); color: var(--color-text); }
.btn-ghost:hover { background: var(--color-surface-2); }

/* ===== Hero ===== */
.hero { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); position: relative; overflow: hidden; }
.hero::before { content:''; position:absolute; inset:0; z-index:0;
  background: radial-gradient(60% 80% at 75% 10%, rgba(27,84,196,0.10), transparent 70%),
              radial-gradient(50% 60% at 10% 90%, rgba(224,122,46,0.08), transparent 70%); }
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.eyebrow { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-xs);
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent); padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full); margin-bottom: var(--space-5); }
.hero h1 { font-size: var(--text-2xl); letter-spacing: -0.02em; margin-bottom: var(--space-5); }
.hero h1 em { font-style: italic; color: var(--color-primary); }
.hero p { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 60ch; margin-bottom: var(--space-8); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }
.hero-stats { display: flex; flex-wrap: wrap; gap: var(--space-8); margin-top: var(--space-12);
  padding-top: var(--space-8); border-top: 1px solid var(--color-divider); }
.hero-stat strong { display: block; font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-text); }
.hero-stat span { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ===== Section headers ===== */
.section-head { margin-bottom: var(--space-12); max-width: 60ch; }
.section-head .eyebrow { margin-bottom: var(--space-4); }
.section-head h2 { font-size: var(--text-xl); letter-spacing: -0.01em; margin-bottom: var(--space-3); }
.section-head p { color: var(--color-text-muted); }

/* ===== Article grid ===== */
.grid { display: grid; gap: var(--space-6); }
.grid-articles { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.card { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s, border-color .2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-border); }
.card-media { aspect-ratio: 16/10; background: var(--color-surface-2); overflow: hidden; position: relative; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.card:hover .card-media img { transform: scale(1.04); }
.card-tag { position: absolute; top: var(--space-3); left: var(--space-3); font-size: var(--text-xs);
  font-weight: 600; background: color-mix(in srgb, var(--color-bg) 92%, transparent); color: var(--color-primary);
  padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); backdrop-filter: blur(6px); }
.card-body { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.card-body h3 { font-size: var(--text-lg); line-height: 1.25; }
.card:hover .card-body h3 { color: var(--color-primary); }
.card-body p { font-size: var(--text-sm); color: var(--color-text-muted); flex: 1; }
.card-meta { display: flex; align-items: center; gap: var(--space-3); font-size: var(--text-xs); color: var(--color-text-faint); }

/* Featured card */
.featured { display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: var(--radius-xl); overflow: hidden; margin-bottom: var(--space-8); }
.featured .card-media { aspect-ratio: auto; min-height: 320px; }
.featured .card-body { padding: clamp(var(--space-8), 4vw, var(--space-16)); justify-content: center; }
.featured .card-body h3 { font-size: var(--text-xl); }
@media (max-width: 820px){ .featured { grid-template-columns: 1fr; } .featured .card-media { min-height: 220px; } }

/* ===== Comparison table ===== */
.table-wrap { overflow-x: auto; border: 1px solid var(--color-divider); border-radius: var(--radius-lg); background: var(--color-surface); }
table.cmp { min-width: 640px; }
table.cmp th, table.cmp td { padding: var(--space-4) var(--space-5); text-align: left; border-bottom: 1px solid var(--color-divider); font-size: var(--text-sm); }
table.cmp thead th { background: var(--color-surface-2); font-weight: 600; color: var(--color-text); font-family: var(--font-body); }
table.cmp tbody tr:last-child td { border-bottom: none; }
table.cmp td:first-child { font-weight: 600; }
.pill { display: inline-block; font-size: var(--text-xs); font-weight: 600; padding: 2px var(--space-3); border-radius: var(--radius-full); }
.pill-best { background: color-mix(in srgb, var(--color-success) 15%, transparent); color: var(--color-success); }
.pill-rec { background: color-mix(in srgb, var(--color-accent) 15%, transparent); color: var(--color-accent); }

/* ===== Newsletter ===== */
.cta-band { background: var(--color-text); color: var(--color-text-inverse); border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 6vw, var(--space-20)); text-align: center; }
[data-theme='dark'] .cta-band { background: var(--color-surface-2); border: 1px solid var(--color-border); }
.cta-band h2 { font-size: var(--text-xl); margin-bottom: var(--space-3); color: var(--color-text-inverse); }
[data-theme='dark'] .cta-band h2 { color: var(--color-text); }
.cta-band p { color: color-mix(in srgb, var(--color-text-inverse) 70%, transparent); margin-bottom: var(--space-8); max-width: 50ch; margin-inline: auto; }
[data-theme='dark'] .cta-band p { color: var(--color-text-muted); }
.signup { display: flex; gap: var(--space-3); max-width: 460px; margin-inline: auto; flex-wrap: wrap; }
.signup input { flex: 1; min-width: 220px; padding: var(--space-3) var(--space-4); border-radius: var(--radius-md);
  border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text); }
.signup-note { font-size: var(--text-xs); margin-top: var(--space-4); opacity: 0.7; }
.signup-powered { font-size: var(--text-xs); margin-top: var(--space-2); opacity: 0.5; }
.signup-powered a { color: inherit; text-decoration: underline; }

/* ===== Disclosure / affiliate box ===== */
.disclosure { font-size: var(--text-xs); color: var(--color-text-faint); background: var(--color-surface-2);
  border: 1px solid var(--color-divider); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); margin-bottom: var(--space-8); }

/* ===== Article body ===== */
.article-hero { padding-block: var(--space-12) var(--space-8); }
.article-hero .eyebrow { margin-bottom: var(--space-4); }
.article-hero h1 { font-size: var(--text-2xl); letter-spacing: -0.02em; margin-bottom: var(--space-5); max-width: 20ch; }
.article-hero .lede { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 60ch; }
.article-meta { display: flex; gap: var(--space-4); font-size: var(--text-sm); color: var(--color-text-faint); margin-top: var(--space-6); align-items: center; }
.article-feature-img { width: 100%; aspect-ratio: 16/8; object-fit: cover; border-radius: var(--radius-lg); margin-block: var(--space-8); }
.prose { font-size: var(--text-base); }
.prose > * + * { margin-top: var(--space-5); }
.prose h2 { font-size: var(--text-xl); margin-top: var(--space-12); margin-bottom: var(--space-2); }
.prose h3 { font-size: var(--text-lg); margin-top: var(--space-8); font-family: var(--font-body); font-weight: 700; }
.prose p, .prose li { color: var(--color-text); max-width: 68ch; }
.prose ul, .prose ol { padding-left: var(--space-6); }
.prose li { margin-top: var(--space-2); }
.prose a { color: var(--color-primary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--color-primary-hover); }
.prose strong { font-weight: 700; }
.tool-box { background: var(--color-surface); border: 1px solid var(--color-border); border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md); padding: var(--space-6); margin-block: var(--space-6); }
.tool-box h3 { margin-top: 0; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.tool-box .price { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; }
.tool-box .verdict { font-size: var(--text-sm); margin-top: var(--space-3); }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--color-divider); background: var(--color-surface); padding-block: var(--space-12); margin-top: var(--space-12); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-8); margin-bottom: var(--space-10); }
.footer-grid h4 { font-family: var(--font-body); font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.footer-grid a { display: block; font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2); }
.footer-grid a:hover { color: var(--color-text); }
.footer-about p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 42ch; margin-top: var(--space-4); }
.footer-bottom { display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap;
  padding-top: var(--space-6); border-top: 1px solid var(--color-divider); font-size: var(--text-xs); color: var(--color-text-faint); }
@media (max-width: 720px){ .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); } }

/* ===== Responsive nav ===== */
@media (max-width: 760px){
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column;
    background: var(--color-surface); border-bottom: 1px solid var(--color-divider); padding: var(--space-5) var(--space-6); gap: var(--space-4); }
  .nav.open { display: flex; }
  .nav a { font-size: var(--text-base); }
  .menu-btn { display: grid; place-items: center; width: 38px; height: 38px; color: var(--color-text); }
}