@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ===== Base ===== */
:root {
  --color-bg: #ffffff;
  --color-text: #14161c;
  --color-muted: #667085;
  --color-border: #e9eaee;
  --color-primary: #4b3df5;
  --color-primary-dark: #372cc9;
  --color-accent: #00c2a8;
  --color-surface: #f7f7fb;
  --color-header-bg: #0b0c14;
  --color-header-text: #ffffff;
  --max-width: 1160px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16, 18, 30, 0.04);
  --shadow-md: 0 8px 24px rgba(16, 18, 30, 0.08);
  --shadow-lg: 0 20px 48px rgba(16, 18, 30, 0.12);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  background: rgba(11, 12, 20, 0.85);
  backdrop-filter: blur(10px);
  color: var(--color-header-text);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

.site-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-header-text);
  letter-spacing: -0.02em;
}

.site-nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.site-nav a {
  color: #a8adc0;
  font-weight: 500;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: #ffffff;
  text-decoration: none;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background: radial-gradient(circle at 15% 20%, rgba(75, 61, 245, 0.35), transparent 45%),
              radial-gradient(circle at 85% 0%, rgba(0, 194, 168, 0.25), transparent 40%),
              var(--color-header-bg);
  color: #ffffff;
  padding: 96px 0 100px;
  overflow: hidden;
}

.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  color: #d7d9ea;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero .eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 0 0 20px;
  max-width: 760px;
}

.hero p {
  color: #b3b6c9;
  max-width: 600px;
  font-size: 1.15rem;
  margin: 0 0 32px;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.18);
  color: #ffffff;
  margin-left: 12px;
  box-shadow: none;
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-2px);
}

/* ===== Sections ===== */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.section-subtitle {
  color: var(--color-muted);
  margin: 0 0 40px;
  max-width: 640px;
  font-size: 1.02rem;
}

/* ===== Post grid / cards ===== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .post-grid { grid-template-columns: 1fr; }
}

.post-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.post-card .post-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.post-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.post-card p {
  color: var(--color-muted);
  font-size: 0.95rem;
  flex-grow: 1;
}

.post-card .post-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 14px;
}

/* ===== Blog listing (full width rows) ===== */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.post-row {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.post-row:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-row h3 {
  margin: 0 0 6px;
  font-size: 1.25rem;
  font-weight: 700;
}

.post-row .post-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 600;
}

.post-row p {
  color: var(--color-muted);
  margin: 0 0 10px;
}

/* ===== Article page ===== */
.article-header {
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--color-border);
}

.article-header .post-category {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-header h1 {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 12px 0 14px;
  max-width: 780px;
}

.article-meta {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.article-body {
  max-width: 720px;
  padding: 40px 0;
  font-size: 1.08rem;
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 40px 0 16px;
}

.article-body h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 30px 0 12px;
}

.article-body p { margin: 0 0 18px; }

.article-body ul, .article-body ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-body th, .article-body td {
  border: 1px solid var(--color-border);
  padding: 12px 14px;
  text-align: left;
  font-size: 0.95rem;
}

.article-body th {
  background: var(--color-surface);
  font-weight: 700;
}

.author-box {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  margin-top: 40px;
  background: var(--color-surface);
  max-width: 720px;
}

.author-box .author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  flex-shrink: 0;
}

.author-box h4 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 700;
}

.author-box p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* ===== Guidelines / static content pages ===== */
.content-page {
  max-width: 760px;
  padding: 56px 0 72px;
}

.content-page h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}

.content-page h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 36px 0 12px;
}

.content-page p { margin: 0 0 16px; }

.content-page ul, .content-page ol {
  margin: 0 0 16px;
  padding-left: 24px;
}

.callout {
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  margin: 26px 0;
}

.email-box {
  display: inline-block;
  background: var(--color-header-bg);
  color: #ffffff;
  padding: 15px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 8px 0 24px;
  box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-header-bg);
  color: #9198ad;
  padding: 40px 0;
  margin-top: 48px;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.site-footer p {
  color: #7d84a0;
  font-size: 0.85rem;
  margin: 0;
}

.site-footer nav ul {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.site-footer nav a {
  color: #a8adc0;
  font-size: 0.85rem;
}

.site-footer nav a:hover {
  color: #ffffff;
}

/* ===== Header: logo link, CTA, toggle ===== */
.site-logo a { color: var(--color-header-text); text-decoration: none; }
.site-nav > ul { align-items: center; gap: 6px; flex-wrap: nowrap; }
.site-nav > ul > li > a:not(.btn),
.mega-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  color: #a8adc0;
  font: inherit;
  font-weight: 500;
  font-size: 0.92rem;
  background: none;
  border: 0;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease;
}
.site-nav > ul > li > a:not(.btn):hover,
.mega-trigger:hover,
.has-mega.open .mega-trigger,
.mega-trigger.active,
.site-nav a.active { color: #fff; background: rgba(255,255,255,0.07); text-decoration: none; }
.mega-trigger svg { transition: transform 0.2s ease; }
.has-mega.open .mega-trigger svg { transform: rotate(180deg); }
.nav-cta { margin-left: 10px; }
.btn-nav { padding: 9px 18px; font-size: 0.88rem; box-shadow: none; color: #fff !important; }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; }

/* ===== Mega menu ===== */
.has-mega { position: static; }
.mega-panel {
  position: absolute;
  left: 0; right: 0; top: 100%;
  background: #fff;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}
.has-mega.open .mega-panel,
.has-mega:hover .mega-panel,
.has-mega:focus-within .mega-panel { opacity: 1; visibility: visible; transform: none; }
.mega-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 36px;
}
.mega-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  padding-bottom: 10px;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--topic);
}
.mega-head:hover { text-decoration: none; color: var(--topic); }
.mega-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--topic) 14%, #fff);
  color: var(--topic);
  flex-shrink: 0;
}
.mega-icon.big { width: 52px; height: 52px; border-radius: 14px; margin-bottom: 16px; background: rgba(255,255,255,0.12); color: #fff; }
.mega-icon.big svg { width: 26px; height: 26px; }
.mega-col ul { list-style: none; margin: 0; padding: 0; display: block; }
.mega-col li a {
  display: block;
  padding: 5px 0 5px 4px;
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: color 0.12s ease, padding 0.12s ease;
}
.mega-col li a:hover { color: var(--topic); padding-left: 10px; text-decoration: none; }
.mega-foot {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--color-muted);
}
.mega-foot a { font-weight: 600; }

/* ===== Topic cards (home) and topic pages ===== */
.topic-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.topic-card {
  display: block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--topic);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.topic-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); text-decoration: none; }
.topic-card h3 { margin: 14px 0 6px; font-size: 1.1rem; font-weight: 700; }
.topic-card p { margin: 0; color: var(--color-muted); font-size: 0.92rem; }
.topic-hero {
  background: radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--topic) 55%, transparent), transparent 55%), var(--color-header-bg);
  color: #fff;
  padding: 72px 0 76px;
}
.topic-hero h1 { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.03em; margin: 0 0 12px; }
.topic-hero p { color: #b3b6c9; max-width: 600px; font-size: 1.1rem; margin: 0; }
.topic-subgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 24px; }
.topic-sub { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; scroll-margin-top: 90px; }
.topic-sub:target { border-color: var(--topic); box-shadow: var(--shadow-md); }
.topic-sub h3 { margin: 0 0 6px; font-size: 1.05rem; }
.topic-sub p { margin: 0; color: var(--color-muted); font-size: 0.9rem; }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .topic-cards, .topic-subgrid { grid-template-columns: repeat(2, 1fr); }
  .nav-toggle { display: block; }
  .site-nav { display: none; width: 100%; }
  .site-nav.open { display: block; }
  .site-nav > ul { flex-direction: column; align-items: stretch; gap: 2px; padding-bottom: 12px; }
  .site-nav > ul > li > a:not(.btn), .mega-trigger { width: 100%; padding: 12px 10px; justify-content: space-between; }
  .nav-cta { margin: 8px 0 0; }
  .btn-nav { display: block; text-align: center; }
  .mega-panel { position: static; display: none; opacity: 1; visibility: visible; transform: none; box-shadow: none; border-radius: 10px; margin: 4px 0 8px; }
  .has-mega.open .mega-panel { display: block; }
  .has-mega:hover .mega-panel:not(:focus-within) { opacity: 1; }
  .mega-grid { grid-template-columns: 1fr; padding: 18px; gap: 20px; }
  .mega-foot { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 600px) {
  .topic-cards, .topic-subgrid { grid-template-columns: 1fr; }
  .hero h1, .topic-hero h1 { font-size: 2rem; }
}

/* Specificity fixes: keep panel links from inheriting the dark-header nav color */
.site-nav .mega-head { color: var(--color-text); font-size: 0.95rem; }
.site-nav .mega-head:hover { color: var(--topic); }
.site-nav .mega-col li a { color: var(--color-muted); }
.site-nav .mega-col li a:hover { color: var(--topic); }
.site-nav .mega-foot a { color: var(--color-primary); }


/* =========================================================
   Premium light theme (overrides): ivory, navy, muted gold
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-text: #0e1a2b;
  --color-muted: #5a6478;
  --color-border: #e5e2da;
  --color-primary: #1f3a6e;
  --color-primary-dark: #14284b;
  --color-accent: #b8893b;
  --color-surface: #f6f4ef;
  --color-header-bg: #0e1a2b;
  --shadow-md: 0 10px 30px rgba(14, 26, 43, 0.08);
  --shadow-lg: 0 22px 50px rgba(14, 26, 43, 0.12);
}

/* Header: light, quiet */
.site-header { background: rgba(255, 255, 255, 0.94); color: var(--color-text); border-bottom: 1px solid var(--color-border); }
.site-logo, .site-logo a { color: var(--color-text); }
.site-nav > ul > li > a:not(.btn), .mega-trigger { color: #3b4659; }
.site-nav > ul > li > a:not(.btn):hover, .mega-trigger:hover, .has-mega.open .mega-trigger,
.mega-trigger.active, .site-nav a.active { color: var(--color-text); background: rgba(14, 26, 43, 0.06); }
.nav-toggle span { background: var(--color-text); }

/* Buttons */
.btn { background: var(--color-primary-dark); color: #fff; box-shadow: 0 6px 16px rgba(20, 40, 75, 0.22); }
.btn:hover { background: var(--color-primary); }
.btn-secondary { background: transparent; color: var(--color-text); border: 1px solid #c9c5b8; margin-left: 12px; box-shadow: none; }
.btn-secondary:hover { background: var(--color-surface); transform: translateY(-2px); }
.btn-nav, .btn-nav:hover { color: #fff !important; box-shadow: none; }
.btn-nav { background: var(--color-primary-dark); }
.btn-nav:hover { background: var(--color-accent); }

/* Hero */
.hero-light { background: linear-gradient(180deg, #ffffff 0%, #f6f4ef 100%); padding: 84px 0 88px; border-bottom: 1px solid var(--color-border); }
.hero-light-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 18px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-accent); }
.kicker::before { content: ""; width: 28px; height: 2px; background: currentColor; }
.hero-light h1 { font-size: 3.1rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 20px; }
.hero-light .lead { font-size: 1.15rem; color: var(--color-muted); max-width: 540px; margin: 0 0 32px; }
.hero-light-actions { display: flex; flex-wrap: wrap; gap: 4px; }
.hero-light-actions .btn-secondary { margin-left: 8px; }

.stat-feature { background: #fff; border: 1px solid var(--color-border); border-top: 4px solid var(--color-accent); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-lg); }
.stat-feature-label { margin: 0 0 6px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); }
.stat-feature-num { margin: 0; font-size: 5rem; font-weight: 800; letter-spacing: -0.04em; line-height: 1; color: var(--color-primary-dark); }
.stat-feature-text { margin: 12px 0 18px; font-size: 1.05rem; }
.stat-source { margin: 0; font-size: 0.78rem; color: var(--color-muted); line-height: 1.5; }
.stat-source a { color: var(--color-primary); text-decoration: underline; }

/* USP section */
.usp .section-title { max-width: 720px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 56px; }
.stat-tile { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 26px 24px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm); }
.stat-num { margin: 0 0 10px; font-size: 2.8rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1; color: var(--color-primary-dark); }
.stat-num::after { content: ""; display: block; width: 36px; height: 3px; background: var(--color-accent); margin-top: 12px; }
.stat-text { margin: 0 0 14px; font-size: 0.95rem; flex-grow: 1; }
.usp-sub { font-size: 1.3rem; font-weight: 700; margin: 0 0 20px; }
.benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 28px; }
.benefit { border-top: 1px solid var(--color-border); padding-top: 18px; }
.benefit-n { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background: var(--color-primary-dark); color: #fff; font-size: 0.85rem; font-weight: 700; margin-bottom: 12px; }
.benefit h4 { margin: 0 0 6px; font-size: 1.02rem; font-weight: 700; }
.benefit p { margin: 0; color: var(--color-muted); font-size: 0.92rem; }
.usp-note { background: var(--color-surface); border-left: 4px solid var(--color-accent); border-radius: var(--radius-sm); padding: 14px 18px; font-size: 0.9rem; color: var(--color-muted); margin: 0 0 24px; }

/* Topic cards, tiles and rows on a light theme */
.section-alt { background: var(--color-surface); }
.topic-card, .post-card, .post-row { border-color: var(--color-border); }
.mega-foot a, .site-nav .mega-foot a { color: var(--color-primary); }

/* Topic page hero */
.topic-hero { background: var(--color-surface); color: var(--color-text); border-bottom: 4px solid var(--topic); padding: 64px 0 60px; }
.topic-hero p { color: var(--color-muted); }
.mega-icon.big { background: var(--color-text); color: var(--topic); }

@media (max-width: 960px) {
  .hero-light-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-light h1 { font-size: 2.5rem; }
  .stat-grid, .benefit-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .hero-light { padding: 48px 0 56px; }
  .hero-light h1 { font-size: 2rem; }
  .stat-feature-num { font-size: 4rem; }
  .stat-grid, .benefit-grid { grid-template-columns: 1fr; }
}