/* ===== CSS Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.08), 0 8px 10px -6px rgba(0,0,0,.04);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --max-w: 1200px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }

/* ===== Utility ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ===== Header / Navbar ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav__logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 800; color: var(--text);
  letter-spacing: -.02em;
}
.nav__logo:hover { color: var(--text); }
.nav__logo svg { flex-shrink: 0; }
.nav__links { display: flex; gap: 32px; align-items: center; }
.nav__links a {
  font-size: .925rem; font-weight: 500; color: var(--text-muted);
  position: relative; transition: color var(--transition);
}
.nav__links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--primary);
  transition: width var(--transition);
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
  flex-shrink: 0;
}
@media (max-width: 768px) {
  .hamburger {
    display: flex;
    position: fixed;
    right: 24px;
    top: 18px;
    z-index: 1001;
  }
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(37,99,235,.25), transparent),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(6,182,212,.15), transparent);
}
.hero .container { position: relative; z-index: 1; }
.hero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px; padding: 6px 16px 6px 8px;
  font-size: .8rem; font-weight: 600; color: var(--accent);
  margin-bottom: 24px;
}
.hero__badge span {
  background: var(--accent); color: var(--bg-dark);
  border-radius: 999px; padding: 2px 10px; font-size: .7rem; font-weight: 700;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -.03em;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #67e8f9);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__desc {
  font-size: 1.15rem; color: rgba(255,255,255,.65);
  max-width: 520px; margin-bottom: 36px; line-height: 1.75;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-sm);
  font-size: .95rem; font-weight: 600; border: none; cursor: pointer;
  transition: all var(--transition);
}
.btn--primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 0 0 0 rgba(37,99,235,.3);
}
.btn--primary:hover {
  background: var(--primary-dark); color: #fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,.15);
}
.btn--outline {
  background: transparent; color: #fff;
  border: 1.5px solid rgba(255,255,255,.25);
}
.btn--outline:hover {
  border-color: rgba(255,255,255,.5); color: #fff;
}

/* Hero visual */
.hero__visual { position: relative; max-width: 100%; }
.hero__code {
  background: rgba(15,23,42,.8);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 24px;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.9;
  color: #cbd5e1;
  overflow-x: auto;
  backdrop-filter: blur(8px);
  max-width: 100%;
  min-width: 0;
}
.hero__code .tag { color: #f472b6; }
.hero__code .attr { color: #67e8f9; }
.hero__code .str { color: #a5f3fc; }
.hero__code .cmt { color: #475569; font-style: italic; }
.hero__code .kw { color: #c084fc; }
.hero__code .num { color: #fbbf24; }

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section--alt { background: var(--bg-alt); }
.section__label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .78rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: var(--primary);
  margin-bottom: 12px;
}
.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800; letter-spacing: -.025em;
  line-height: 1.2; margin-bottom: 16px;
}
.section__desc {
  font-size: 1.1rem; color: var(--text-muted);
  max-width: 640px; margin-bottom: 56px; line-height: 1.75;
}
.section__desc.centered { margin-left: auto; margin-right: auto; text-align: center; }
.text-center { text-align: center; }

/* ===== Feature Cards ===== */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.feature-card__icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  color: var(--primary);
}
.feature-card h3 {
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: 10px; letter-spacing: -.01em;
}
.feature-card p {
  font-size: .95rem; color: var(--text-muted); line-height: 1.7;
}

/* ===== ER Model Section ===== */
.er-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.er-list { display: flex; flex-direction: column; gap: 20px; }
.er-item { display: flex; gap: 16px; }
.er-item__num {
  flex-shrink: 0;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: .8rem;
  font-weight: 700;
}
.er-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.er-item p { font-size: .92rem; color: var(--text-muted); line-height: 1.65; }

/* ER Diagram visual */
.er-diagram {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
}
.er-table {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
}
.er-table__head {
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.er-table__row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  font-size: .82rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
}
.er-table__row:last-child { border-bottom: none; }
.er-table__key {
  font-size: .65rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
}
.er-table__key.pk { background: #fef3c7; color: #b45309; }
.er-table__key.fk { background: #dbeafe; color: #1d4ed8; }
.er-relation {
  text-align: center;
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-light);
  padding: 4px 0;
}

/* ===== Maven Tasks ===== */
.tasks-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.task-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: all var(--transition);
}
.task-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.task-card__name {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 8px;
}
.task-card p {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== Code Block ===== */
.code-block {
  background: var(--bg-dark);
  border-radius: var(--radius);
  padding: 28px 24px;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.85;
  color: #cbd5e1;
  overflow-x: auto;
  position: relative;
}
.code-block__label {
  position: absolute; top: 12px; right: 16px;
  font-size: .65rem; font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.code-block .tag { color: #f472b6; }
.code-block .attr { color: #67e8f9; }
.code-block .str { color: #a5f3fc; }
.code-block .cmt { color: #475569; }
.code-block .kw { color: #c084fc; }
.code-block .num { color: #fbbf24; }
.code-block .prop { color: #86efac; }

/* ===== View Section ===== */
.view-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }

/* ===== Column Types Table ===== */
.types-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.types-table thead { background: var(--bg-dark); color: #fff; }
.types-table th {
  padding: 14px 20px;
  font-size: .82rem;
  font-weight: 700;
  text-align: left;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.types-table td {
  padding: 14px 20px;
  font-size: .9rem;
  border-bottom: 1px solid var(--border);
}
.types-table tr:last-child td { border-bottom: none; }
.types-table td code {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
}

/* ===== Localization ===== */
.locale-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.locale-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.locale-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.locale-card__flag { font-size: 2.5rem; margin-bottom: 16px; }
.locale-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.locale-card p { font-size: .9rem; color: var(--text-muted); line-height: 1.65; }

/* ===== Freemarker ===== */
.fm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.fm-features { display: flex; flex-direction: column; gap: 24px; }
.fm-feature {
  display: flex; gap: 16px; align-items: flex-start;
}
.fm-feature__icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-sm);
  color: #fff;
}
.fm-feature h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.fm-feature p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; }

/* ===== Architecture ===== */
.arch-layers {
  display: flex; flex-direction: column; gap: 0;
  max-width: 700px; margin: 0 auto;
}
.arch-layer {
  padding: 24px 28px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  position: relative;
  transition: all var(--transition);
}
.arch-layer:hover { transform: scale(1.03); }
.arch-layer--view {
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
  color: #fff;
  border-radius: var(--radius) var(--radius) 0 0;
}
.arch-layer--logic {
  background: linear-gradient(135deg, var(--primary), #60a5fa);
  color: #fff;
}
.arch-layer--data {
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  color: var(--bg-dark);
  border-radius: 0 0 var(--radius) var(--radius);
}
.arch-connector {
  display: flex; align-items: center; justify-content: center;
  padding: 8px 0;
  color: var(--text-light);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
}

/* ===== CTA ===== */
.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--bg-dark), #1e293b);
  color: #fff;
  text-align: center;
}
.cta h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800; letter-spacing: -.025em;
  margin-bottom: 16px;
}
.cta p {
  font-size: 1.15rem; color: rgba(255,255,255,.6);
  max-width: 560px; margin: 0 auto 36px;
}
.cta .btn--primary { font-size: 1.05rem; padding: 16px 36px; }

/* ===== Footer ===== */
.footer {
  padding: 48px 0;
  background: var(--bg-dark);
  color: rgba(255,255,255,.45);
  border-top: 1px solid rgba(255,255,255,.06);
}
.footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.footer__copy { font-size: .85rem; }
.footer__links { display: flex; gap: 24px; }
.footer__links a { color: rgba(255,255,255,.45); font-size: .85rem; }
.footer__links a:hover { color: rgba(255,255,255,.8); }

/* ===== Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Mobile Nav Overlay ===== */
.mobile-nav {
  display: none;
  position: fixed; inset: 0; z-index: 999;
  background: rgba(15,23,42,.95);
  backdrop-filter: blur(12px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-size: 1.3rem; font-weight: 600; color: #fff;
}
.mobile-nav a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero__grid, .er-grid, .view-grid, .fm-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual, .hero__code { max-width: 100%; min-width: 0; }
  .hero__code { white-space: normal !important; overflow-x: hidden; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .locale-grid { grid-template-columns: repeat(2, 1fr); }
}
.types-table-wrap {
  overflow-x: auto;
  max-width: 100%;
}
.types-table {
  min-width: 600px;
}
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .container { width: 100%; max-width: none; }
  .workflow-grid { grid-template-columns: 1fr; }
  .nav__links { display: none; }
  .features { grid-template-columns: 1fr; }
  .locale-grid { grid-template-columns: 1fr; }
  .tasks-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 130px 0 70px; }
  .section { padding: 70px 0; }
}
@media (max-width: 480px) {
  .tasks-grid { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { text-align: center; justify-content: center; }
  .code-block { white-space: normal !important; }
}
.code-block-wrap {
  overflow-x: auto;
  max-width: 100%;
  width: 100%;
}
@media (max-width: 480px) {
  .code-block-wrap .code-block {
    max-width: none !important;
  }
}