/* ── Custom Properties ──────────────────────────────────────────────────── */
:root {
  --bg:             #F0F5FF;
  --surface:        #FFFFFF;
  --surface-alt:    #E8EFFF;
  --text:           #0F1A3E;
  --text-muted:     #5A6A8A;
  --primary:        #1D4ED8;
  --primary-hover:  #1E40AF;
  --primary-light:  #DBEAFE;
  --secondary:      #0EA5E9;
  --accent:         #06B6D4;
  --border:         #C7D7F5;
  --shadow:         0 2px 8px rgba(29,78,216,0.08);
  --shadow-lg:      0 8px 32px rgba(29,78,216,0.16);
  --radius:         12px;
  --radius-sm:      6px;
  --transition:     0.2s ease;
}

[data-theme="dark"] {
  --bg:             #080E24;
  --surface:        #111827;
  --surface-alt:    #0D1535;
  --text:           #E8EEFF;
  --text-muted:     #8A9CC0;
  --primary:        #60A5FA;
  --primary-hover:  #93C5FD;
  --primary-light:  #1E3560;
  --secondary:      #38BDF8;
  --accent:         #22D3EE;
  --border:         #1E3560;
  --shadow:         0 2px 8px rgba(0,0,0,0.35);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.55);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color var(--transition), color var(--transition);
}

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

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

/* ── Layout ─────────────────────────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo .accent { color: var(--primary); }

/* Nav */
.main-nav ul {
  display: flex;
  list-style: none;
  gap: 0.15rem;
}

.main-nav a {
  display: block;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  background: var(--primary-light);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0.4rem;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition);
}
.theme-toggle:hover { background: var(--surface-alt); border-color: var(--primary); }
.theme-toggle .icon { width: 1.1rem; height: 1.1rem; display: block; }

/* Show sun in light mode, moon in dark mode */
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"]  .theme-toggle .icon-sun  { display: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-align: center;
  line-height: 1.2;
}

.btn-primary  { background: white; color: var(--primary); border-color: white; }
.btn-primary:hover { background: transparent; color: white; }

.btn-secondary { background: transparent; color: white; border-color: rgba(255,255,255,0.65); }
.btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: white; color: white; }

.btn-solid  { background: var(--primary); color: white; border-color: var(--primary); }
.btn-solid:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: white; }

.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #2563EB 50%, var(--secondary) 100%);
  color: white;
  padding: 5rem 0 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 60% 30%, rgba(255,255,255,0.1) 0%, transparent 65%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -1px;
}
.hero p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  opacity: 0.92;
  max-width: 580px;
  margin: 0 auto 2.25rem;
}
.hero-ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Sections ────────────────────────────────────────────────────────────── */
section { padding: 4rem 0; }
.section-alt { background: var(--surface-alt); }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: 0.6rem;
}

h2.section-title {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}

.section-intro {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 580px;
  margin-bottom: 2.5rem;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.card-icon { width: 2.25rem; height: 2.25rem; margin-bottom: 0.9rem; display: block; color: var(--primary); }
.card h3   { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.4rem; }
.card p    { color: var(--text-muted); font-size: 0.93rem; line-height: 1.6; }

/* ── Value props list ────────────────────────────────────────────────────── */
.value-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.value-item { display: flex; gap: 1rem; align-items: flex-start; }
.value-icon { width: 1.75rem; height: 1.75rem; flex-shrink: 0; margin-top: 0.1rem; color: var(--primary); }
.value-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem; }
.value-item p  { color: var(--text-muted); font-size: 0.9rem; }

/* ── CTA band ────────────────────────────────────────────────────────────── */
.cta-band {
  background: linear-gradient(135deg, var(--primary) 0%, #2563EB 100%);
  color: white;
  padding: 4.5rem 0;
  text-align: center;
}
.cta-band h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 0.85rem;
}
.cta-band p { opacity: 0.9; margin-bottom: 2rem; font-size: 1.05rem; }

/* ── Page hero (inner pages) ─────────────────────────────────────────────── */
.page-hero {
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
  padding: 3rem 0 2.75rem;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 0.6rem;
}
.page-hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 540px; }

/* ── About page ──────────────────────────────────────────────────────────── */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
}
.about-content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.78;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.value-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.value-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.value-card .icon { width: 2rem; height: 2rem; margin-bottom: 0.6rem; display: block; color: var(--primary); }
.value-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.value-card p  { color: var(--text-muted); font-size: 0.875rem; line-height: 1.5; }

/* ── Services page ───────────────────────────────────────────────────────── */
.service-list { display: grid; gap: 1.25rem; margin-top: 2rem; }

.service-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.service-item:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); }
.service-icon { width: 2.25rem; height: 2.25rem; flex-shrink: 0; color: var(--primary); }
.service-item h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; }
.service-item p  { color: var(--text-muted); font-size: 0.93rem; line-height: 1.65; }

.service-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.8rem; }
.tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 100px;
}

/* ── Contact page ────────────────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.contact-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.75rem; }
.contact-detail  { display: flex; gap: 0.75rem; margin-bottom: 1rem; align-items: flex-start; }
.contact-detail .icon { width: 1.25rem; height: 1.25rem; flex-shrink: 0; margin-top: 0.1rem; color: var(--secondary); }
.contact-detail p { color: var(--text-muted); font-size: 0.95rem; }
.contact-detail a { color: var(--text-muted); }
.contact-detail a:hover { color: var(--primary); }

/* ── Form ────────────────────────────────────────────────────────────────── */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}
.form-group textarea { min-height: 140px; resize: vertical; }

.form-status {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}
.form-status.success {
  display: block;
  background: rgba(6, 214, 160, 0.12);
  color: #048A68;
  border: 1px solid rgba(6, 214, 160, 0.35);
}
[data-theme="dark"] .form-status.success { color: var(--accent); }
.form-status.error {
  display: block;
  background: rgba(220, 38, 38, 0.10);
  color: #B91C1C;
  border: 1px solid rgba(220, 38, 38, 0.30);
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-logo { font-size: 1.15rem; font-weight: 800; color: var(--text); }
.footer-logo .accent { color: var(--primary); }

.footer-links { display: flex; gap: 1.5rem; list-style: none; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--primary); }

.footer-copy { color: var(--text-muted); font-size: 0.85rem; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 800px) {
  .about-content { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 1rem 1rem;
  }
  .main-nav.open { display: block; }
  .main-nav ul   { flex-direction: column; gap: 0.2rem; }
  .main-nav a    { padding: 0.6rem 0.75rem; }

  .nav-toggle { display: flex; }

  .hero { padding: 3.5rem 0 3rem; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 520px) {
  .service-item { flex-direction: column; }
  .contact-form { padding: 1.5rem; }
  .btn { padding: 0.7rem 1.25rem; }
}