/* AI Tools for Accountants - Main Stylesheet
   Design system: Navy + Amber, Instrument Serif + DM Sans
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=DM+Sans:wght@400;500;600;700&display=swap');

:root {
  --primary: #0f1b3d;
  --primary-dark: #0a1229;
  --primary-light: #f0f1f5;
  --accent: #d4a039;
  --accent-dark: #c98f2a;
  --accent-light: #fdf8ef;
  --text: #1a1a1a;
  --text-light: #555555;
  --text-lighter: #888888;
  --bg: #ffffff;
  --bg-alt: #f8f7f5;
  --border: #e8e6e2;
  --border-light: #f3f1ed;
  --shadow: 0 1px 3px rgba(15,27,61,0.08), 0 1px 2px rgba(15,27,61,0.04);
  --shadow-md: 0 4px 6px rgba(15,27,61,0.07), 0 2px 4px rgba(15,27,61,0.04);
  --shadow-lg: 0 10px 15px rgba(15,27,61,0.1), 0 4px 6px rgba(15,27,61,0.05);
  --radius: 4px;
  --radius-lg: 8px;
  --max-width: 1200px;
  --header-height: 72px;
  --font-heading: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; height: auto; }

/* Layout */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 64px 0; }
.section--alt { background: var(--bg-alt); }

/* ============================================
   HEADER
   ============================================ */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.header__logo { font-family: var(--font-body); font-size: 1.25rem; font-weight: 700; color: var(--text); }
.header__logo span { color: var(--primary); }
.header__nav { display: flex; gap: 32px; align-items: center; }
.header__nav a { color: var(--text-light); font-size: 0.9375rem; font-weight: 500; }
.header__nav a:hover { color: var(--primary); }
.header__cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff !important; padding: 10px 20px;
  border-radius: var(--radius); font-weight: 600; font-size: 0.875rem;
  transition: all 0.2s;
}
.header__cta:hover { background: var(--primary-dark); color: #fff !important; transform: translateY(-1px); }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle svg { width: 24px; height: 24px; color: var(--text); }

/* ============================================
   HERO (used by generated pages like about, newsletter)
   ============================================ */
.hero {
  padding: 80px 0 64px; text-align: center;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}
.hero h1 {
  font-family: var(--font-heading); font-size: 2.75rem; font-weight: 400;
  line-height: 1.15; margin-bottom: 16px; letter-spacing: -0.02em;
  color: var(--primary);
}
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.25rem; color: var(--text-light); max-width: 640px; margin: 0 auto 32px; }
.hero__cta-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius); font-weight: 600;
  font-family: var(--font-body);
  font-size: 1rem; transition: all 0.25s; border: none; cursor: pointer;
}
.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,27,61,0.2); }
.btn--outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn--outline:hover { background: var(--primary); color: #fff; }
.hero__stats { display: flex; gap: 48px; justify-content: center; margin-top: 48px; }
.hero__stat { text-align: center; }
.hero__stat-value { font-family: var(--font-heading); font-size: 2rem; font-weight: 400; color: var(--accent); }
.hero__stat-label { font-size: 0.875rem; color: var(--text-light); margin-top: 4px; }

/* ============================================
   FILTER BAR
   ============================================ */
.filter-bar {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center;
  padding: 24px 0; border-bottom: 1px solid var(--border);
}
.filter-btn {
  padding: 8px 20px; border-radius: 100px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text-light); font-size: 0.875rem;
  font-family: var(--font-body);
  font-weight: 500; cursor: pointer; transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============================================
   TOOL CARDS
   ============================================ */
.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px; padding: 32px 0;
}
.tool-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; transition: all 0.25s; display: flex; flex-direction: column;
}
.tool-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.tool-card__header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.tool-card__name { font-family: var(--font-body); font-size: 1.25rem; font-weight: 700; color: var(--primary); }
.tool-card__category {
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
  padding: 4px 10px; border-radius: 100px; background: var(--primary-light);
  color: var(--primary); white-space: nowrap;
}
.tool-card__rating { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; }
.tool-card__stars { color: var(--accent); font-size: 0.875rem; }
.tool-card__rating-num { font-weight: 600; font-size: 0.875rem; color: var(--text); }
.tool-card__summary { color: var(--text-light); font-size: 0.9375rem; line-height: 1.6; margin-bottom: 16px; flex: 1; }
.tool-card__meta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.tool-card__tag {
  font-size: 0.8125rem; color: var(--text-light); display: flex; align-items: center; gap: 4px;
}
.tool-card__tag svg { width: 14px; height: 14px; }
.tool-card__tag--green { color: var(--accent-dark); }
.tool-card__footer { display: flex; gap: 12px; }
.tool-card__link {
  flex: 1; text-align: center; padding: 10px 16px; border-radius: var(--radius);
  font-family: var(--font-body); font-weight: 600; font-size: 0.875rem; transition: all 0.2s;
}
.tool-card__link--primary { background: var(--primary); color: #fff; }
.tool-card__link--primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); }
.tool-card__link--outline { border: 1px solid var(--border); color: var(--text); }
.tool-card__link--outline:hover { border-color: var(--primary); color: var(--primary); }

/* ============================================
   TOOL DETAIL PAGE
   ============================================ */
.tool-detail { padding: 48px 0; }
.tool-detail__breadcrumb { font-size: 0.875rem; color: var(--text-light); margin-bottom: 24px; }
.tool-detail__breadcrumb a { color: var(--accent-dark); }
.tool-detail__header { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 24px; margin-bottom: 32px; }
.tool-detail__title { font-family: var(--font-heading); font-size: 2.25rem; font-weight: 400; letter-spacing: -0.02em; color: var(--primary); }
.tool-detail__meta { display: flex; gap: 16px; align-items: center; margin-top: 8px; }
.tool-detail__badge {
  padding: 6px 14px; border-radius: 100px; font-size: 0.8125rem; font-weight: 600;
}
.tool-detail__badge--category { background: var(--primary-light); color: var(--primary); }
.tool-detail__badge--uk { background: var(--accent-light); color: var(--accent-dark); }
.tool-detail__actions { display: flex; gap: 12px; flex-shrink: 0; }
.tool-detail__grid { display: grid; grid-template-columns: 2fr 1fr; gap: 32px; }
.tool-detail__content h2 { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 400; margin: 32px 0 16px; color: var(--primary); }
.tool-detail__content h2:first-child { margin-top: 0; }
.tool-detail__content p { color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.tool-detail__sidebar { position: sticky; top: calc(var(--header-height) + 24px); }
.sidebar-card {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; margin-bottom: 20px;
}
.sidebar-card h3 { font-family: var(--font-body); font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
.sidebar-card__row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.sidebar-card__row:last-child { border-bottom: none; }
.sidebar-card__label { color: var(--text-light); font-size: 0.875rem; }
.sidebar-card__value { font-weight: 600; font-size: 0.875rem; }
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 24px 0; }
.pros-cons__list { list-style: none; }
.pros-cons__list h3 { font-family: var(--font-body); font-size: 1rem; font-weight: 700; margin-bottom: 12px; }
.pros-cons__list li { padding: 6px 0; font-size: 0.9375rem; color: var(--text-light); padding-left: 24px; position: relative; }
.pros-cons__list--pros li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.pros-cons__list--cons li::before { content: "✗"; position: absolute; left: 0; color: #c44; font-weight: 700; }

/* ============================================
   NEWSLETTER CTA (used on tool pages, about, etc.)
   ============================================ */
.newsletter-cta {
  background: var(--primary);
  border-radius: var(--radius-lg); padding: 48px; text-align: center; color: #fff;
  margin: 48px 0;
}
.newsletter-cta h2 { font-family: var(--font-heading); font-size: 1.75rem; font-weight: 400; margin-bottom: 12px; }
.newsletter-cta p { opacity: 0.85; margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
.newsletter-cta__form { display: flex; gap: 12px; max-width: 420px; margin: 0 auto; }
.newsletter-cta__input {
  flex: 1; padding: 14px 16px; border-radius: var(--radius); border: 2px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1); color: #fff; font-family: var(--font-body); font-size: 1rem;
}
.newsletter-cta__input::placeholder { color: rgba(255,255,255,0.5); }
.newsletter-cta__input:focus { outline: none; border-color: var(--accent); background: rgba(255,255,255,0.15); }
.newsletter-cta__btn {
  padding: 14px 24px; border-radius: var(--radius); background: var(--accent);
  color: var(--primary); font-family: var(--font-body); font-weight: 700; border: none; cursor: pointer;
  font-size: 1rem; white-space: nowrap; transition: all 0.2s;
}
.newsletter-cta__btn:hover { background: var(--accent-dark); transform: translateY(-1px); }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--primary); color: rgba(255,255,255,0.7); padding: 48px 0 24px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 32px; }
.footer__brand { font-family: var(--font-body); font-size: 1.125rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer__desc { font-size: 0.875rem; line-height: 1.7; }
.footer h4 { color: var(--accent); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; }
.footer a { color: rgba(255,255,255,0.7); font-size: 0.875rem; }
.footer a:hover { color: var(--accent); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; font-size: 0.8125rem; text-align: center; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1.0625rem; }
  .hero__stats { gap: 24px; }
  .hero__stat-value { font-size: 1.5rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .tool-detail__grid { grid-template-columns: 1fr; }
  .tool-detail__sidebar { position: static; }
  .pros-cons { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .header__nav { display: none; }
  .header__nav.open {
    display: flex; flex-direction: column; position: absolute;
    top: var(--header-height); left: 0; right: 0; background: var(--bg);
    padding: 24px; border-bottom: 1px solid var(--border); gap: 16px;
  }
  .menu-toggle { display: block; }
  .newsletter-cta { padding: 32px 24px; }
  .newsletter-cta__form { flex-direction: column; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .hero__stats { flex-direction: column; gap: 16px; }
  .hero__cta-group { flex-direction: column; align-items: center; }
  .footer__grid { grid-template-columns: 1fr; }
}