/* ─────────────────────────────────────────────────────────────────────────────
   IDEA Asia — Design System
   Palette: bg #0a0a0a · surface #111111 · accent #1A50E8 · text #e0e0e0
   ───────────────────────────────────────────────────────────────────────────── */

/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #0a0a0a;
  --surface:     #111111;
  --surface-2:   #161616;
  --border:      #1e1e1e;
  --accent:      #1A50E8;
  --accent-dark: #1440c0;
  --text:        #e0e0e0;
  --text-muted:  #888888;
  --radius:      8px;
  --container:   1200px;
  --section-gap: 80px;
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color:            var(--text);
  font-family:      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size:        16px;
  line-height:      1.7;
  -webkit-font-smoothing: antialiased;
}

img, picture { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul[role="list"] { list-style: none; }

/* ── Container ────────────────────────────────────────────────────────────── */
.container {
  width:   100%;
  max-width: var(--container);
  margin:  0 auto;
  padding: 0 24px;
}

/* ── Accent colour ─────────────────────────────────────────────────────────── */
.accent { color: var(--accent); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display:         inline-block;
  padding:         12px 28px;
  border-radius:   var(--radius);
  font-weight:     600;
  font-size:       15px;
  cursor:          pointer;
  transition:      background 0.2s, transform 0.15s;
  text-decoration: none;
  border:          2px solid transparent;
}
.btn:hover { transform: translateY(-2px); text-decoration: none; }
.btn--primary  { background: var(--accent); color: #fff; }
.btn--primary:hover  { background: var(--accent-dark); }
.btn--ghost    { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover    { border-color: var(--accent); color: var(--accent); }
.btn--outline  { background: transparent; color: var(--accent); border-color: var(--accent); }
.btn--outline:hover  { background: var(--accent); color: #fff; }

/* ── Section ──────────────────────────────────────────────────────────────── */
.section { padding: var(--section-gap) 0; }
.section__title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; margin-bottom: 12px; letter-spacing: -0.5px; }
.section__sub   { color: var(--text-muted); margin-bottom: 40px; }
.section__cta   { margin-top: 40px; text-align: center; }

/* ── Nav ──────────────────────────────────────────────────────────────────── */
.site-header {
  position:   sticky;
  top:        0;
  z-index:    100;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  height:          68px;
}
.nav__logo      { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.nav__links     { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav__link      { color: var(--text-muted); font-size: 15px; transition: color 0.15s; }
.nav__link:hover { color: var(--text); text-decoration: none; }
.nav__link--cta { background: var(--accent); color: #fff; padding: 8px 20px; border-radius: var(--radius); }
.nav__link--cta:hover { background: var(--accent-dark); color: #fff; }
.nav__toggle    { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: transform 0.2s; }

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero { padding: 100px 0 80px; }
.hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero__title { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 800; line-height: 1.15; letter-spacing: -1px; margin-bottom: 20px; }
.hero__sub   { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 36px; line-height: 1.8; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__image picture img { border-radius: 12px; border: 1px solid var(--border); }

/* ── Stats ────────────────────────────────────────────────────────────────── */
.stats__grid   { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card     { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; text-align: center; }
.stat-card__number { display: block; font-size: 2.5rem; font-weight: 800; color: var(--accent); }
.stat-card__label  { display: block; font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ── Services Grid ────────────────────────────────────────────────────────── */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.service-card  {
  background:   var(--surface);
  border:       1px solid var(--border);
  border-radius: var(--radius);
  padding:      28px 24px;
  transition:   border-color 0.2s, transform 0.2s;
  color:        var(--text);
  display:      block;
}
.service-card:hover { border-color: var(--accent); transform: translateY(-4px); text-decoration: none; }
.service-card__icon  { font-size: 1.5rem; display: block; margin-bottom: 12px; }
.service-card h3, .service-card h2 { font-size: 1.05rem; margin-bottom: 8px; }
.service-card p { font-size: 0.9rem; color: var(--text-muted); }
.service-card--large { padding: 36px; }
.service-card__tagline { font-size: 1rem; color: var(--accent); margin-bottom: 12px; font-weight: 500; }
.service-card__features { margin-top: 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; }
.service-card__features li { font-size: 0.85rem; color: var(--text-muted); padding-left: 14px; position: relative; }
.service-card__features li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); }
.service-card__cta { display: inline-block; margin-top: 20px; color: var(--accent); font-size: 0.9rem; font-weight: 600; }
.services-grid--full { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }

/* ── Blog Grid ────────────────────────────────────────────────────────────── */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.blog-card  {
  background:   var(--surface);
  border:       1px solid var(--border);
  border-radius: var(--radius);
  padding:      28px 24px;
  display:      flex;
  flex-direction: column;
  transition:   border-color 0.2s;
}
.blog-card:hover { border-color: var(--accent); }
.blog-card__category { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.blog-card__date  { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px; display: block; }
.blog-card__title { font-size: 1rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
.blog-card__title a { color: var(--text); }
.blog-card__title a:hover { color: var(--accent); text-decoration: none; }
.blog-card__excerpt { font-size: 0.875rem; color: var(--text-muted); flex: 1; margin-bottom: 16px; line-height: 1.6; }
.blog-card__link { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-top: auto; }

/* ── Category Filter ──────────────────────────────────────────────────────── */
.category-filter { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.category-filter__item { padding: 6px 18px; border-radius: 20px; border: 1px solid var(--border); color: var(--text-muted); font-size: 0.875rem; transition: all 0.15s; }
.category-filter__item:hover, .category-filter__item.active { background: var(--accent); border-color: var(--accent); color: #fff; text-decoration: none; }

/* ── Pagination ───────────────────────────────────────────────────────────── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 48px; }
.pagination__btn { color: var(--accent); font-weight: 600; }
.pagination__info { color: var(--text-muted); font-size: 0.875rem; }

/* ── Blog Post Detail ─────────────────────────────────────────────────────── */
.blog-post__inner { max-width: 780px; margin: 0 auto; }
.blog-post__meta  { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; font-size: 0.85rem; color: var(--text-muted); flex-wrap: wrap; }
.blog-post__title { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -0.5px; line-height: 1.2; margin-bottom: 16px; }
.blog-post__excerpt { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 32px; line-height: 1.7; }
.blog-post__featured-image { margin-bottom: 40px; border-radius: 12px; overflow: hidden; }
.blog-post__featured-image img { width: 100%; object-fit: cover; }
.blog-post__body  { font-size: 1rem; line-height: 1.85; }
.blog-post__body h2 { font-size: 1.5rem; font-weight: 700; margin: 40px 0 16px; }
.blog-post__body h3 { font-size: 1.2rem; font-weight: 600; margin: 32px 0 12px; }
.blog-post__body p  { margin-bottom: 20px; }
.blog-post__body ul, .blog-post__body ol { margin: 0 0 20px 24px; }
.blog-post__body li { margin-bottom: 8px; }
.blog-post__body pre { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; overflow-x: auto; margin-bottom: 24px; font-size: 0.875rem; }
.blog-post__body code { background: var(--surface); padding: 2px 6px; border-radius: 4px; font-size: 0.875em; }
.blog-post__body pre code { background: none; padding: 0; }
.blog-post__tags  { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 40px; }
.tag  { background: var(--surface-2); border: 1px solid var(--border); border-radius: 20px; padding: 4px 12px; font-size: 0.8rem; color: var(--text-muted); }
.blog-post__back  { margin-top: 48px; }

/* ── Page Hero ────────────────────────────────────────────────────────────── */
.page-hero { padding: 80px 0 60px; border-bottom: 1px solid var(--border); }
.page-hero__title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.5px; margin-bottom: 12px; }
.page-hero__sub   { font-size: 1.1rem; color: var(--text-muted); }
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-muted); }

/* ── Service Detail ───────────────────────────────────────────────────────── */
.service-detail__grid { display: grid; grid-template-columns: 2fr 1fr; gap: 60px; }
.service-detail__desc { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 32px; line-height: 1.8; }
.feature-list { margin: 16px 0 32px 0; list-style: none; display: grid; gap: 10px; }
.feature-list li { padding-left: 20px; position: relative; }
.feature-list li::before { content: '→'; position: absolute; left: 0; color: var(--accent); }
.service-detail__sidebar { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; align-self: start; }
.service-detail__sidebar h3 { font-size: 0.85rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px; }
.service-detail__sidebar ul { list-style: none; display: grid; gap: 10px; }
.service-detail__sidebar a { color: var(--text-muted); font-size: 0.9rem; }
.service-detail__sidebar a:hover { color: var(--accent); }

/* ── About ────────────────────────────────────────────────────────────────── */
.about__grid  { display: grid; grid-template-columns: 2fr 1fr; gap: 60px; align-items: start; }
.about__content h2 { font-size: 1.3rem; font-weight: 700; margin: 32px 0 12px; }
.about__content h2:first-child { margin-top: 0; }
.about__content p, .about__content li { color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.value-list { list-style: none; display: grid; gap: 12px; }
.value-list li { padding-left: 20px; position: relative; }
.value-list li::before { content: '✦'; position: absolute; left: 0; color: var(--accent); }
.about__sidebar { display: grid; gap: 16px; }
.about-stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; }
.about-stat__number { display: block; font-size: 2.5rem; font-weight: 800; color: var(--accent); }
.about-stat__label  { display: block; font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ── Contact ──────────────────────────────────────────────────────────────── */
.contact__grid { display: grid; grid-template-columns: 3fr 2fr; gap: 60px; }
.form-row  { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }
.form-group label { font-size: 0.875rem; font-weight: 600; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--radius);
  color:         var(--text);
  font-size:     0.95rem;
  font-family:   inherit;
  padding:       10px 14px;
  width:         100%;
  transition:    border-color 0.15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline:       none;
  border-color:  var(--accent);
}
.form-group select option { background: var(--surface); }
.form-group textarea { resize: vertical; min-height: 140px; }
.flash { border-radius: var(--radius); padding: 16px 20px; margin-bottom: 24px; }
.flash--success { background: rgba(26, 80, 232, 0.1); border: 1px solid var(--accent); }
.flash--error   { background: rgba(220, 53, 69, 0.1); border: 1px solid #dc3545; }
.flash--error ul { padding-left: 18px; }
.contact__info h2 { font-size: 1.3rem; margin-bottom: 16px; }
.contact__info p  { color: var(--text-muted); margin-bottom: 24px; }
.contact-details { display: grid; gap: 16px; }
.contact-details dt { font-size: 0.8rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 2px; }
.contact-details dd { color: var(--text); }

/* ── CTA Band ─────────────────────────────────────────────────────────────── */
.cta-band { background: linear-gradient(135deg, #0d0d0d, #0f1a3e); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 80px 0; }
.cta-band__inner { text-align: center; }
.cta-band h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 12px; }
.cta-band p  { color: var(--text-muted); margin-bottom: 32px; }

/* ── Error Pages ──────────────────────────────────────────────────────────── */
.error-page__inner { text-align: center; padding: 100px 0; }
.error-page__code  { display: block; font-size: 6rem; font-weight: 800; color: var(--accent); line-height: 1; margin-bottom: 16px; }
.error-page__title { font-size: 2rem; margin-bottom: 12px; }
.error-page__desc  { color: var(--text-muted); margin-bottom: 36px; }
.error-page__actions { display: flex; gap: 16px; justify-content: center; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-logo { font-size: 1.2rem; font-weight: 700; color: var(--text); display: inline-block; margin-bottom: 12px; }
.footer-tagline { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 12px; }
.footer-contact a { color: var(--text-muted); font-size: 0.875rem; }
.footer-nav__heading { font-size: 0.75rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px; }
.footer-nav ul { display: grid; gap: 10px; }
.footer-nav a { color: var(--text-muted); font-size: 0.875rem; }
.footer-nav a:hover { color: var(--text); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border); padding: 20px 0; }
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }

/* ── Empty state ──────────────────────────────────────────────────────────── */
.empty-state { color: var(--text-muted); text-align: center; padding: 60px 0; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero__inner, .about__grid, .service-detail__grid, .contact__grid { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .form-row    { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  :root { --section-gap: 52px; }
  .nav__links  { display: none; }
  .nav__toggle { display: block; }
  .nav__links.is-open { display: flex; flex-direction: column; position: fixed; inset: 68px 0 0; background: var(--bg); padding: 32px 24px; gap: 24px; z-index: 99; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .services-grid--full { grid-template-columns: 1fr; }
}