/* ===== Modern Professional Theme ===== */
:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #1e293b;       /* slate-800 */
  --muted: #64748b;      /* slate-500 */
  --primary: #2563eb;    /* blue-600 */
  --primary-500: #3b82f6;/* blue-500 */
  --accent: #f97316;     /* orange-500 for highlights */
  --border: #e2e8f0;
  --shadow: 0 8px 24px rgba(15,23,42,.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
.container { width: min(1140px, 92%); margin: 0 auto; }

/* ===== Nav / Header ===== */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand-text { letter-spacing: .3px; font-size: 1.1rem; }
.brand-accent { color: var(--primary); }
.logo { height: 48px; width: auto; }

/* Nav links */
.nav-links a {
  color: var(--text); text-decoration: none; margin-left: 22px;
  font-weight: 500; opacity: .85; transition: color .2s, opacity .2s;
}
.nav-links a:hover { opacity: 1; color: var(--primary); }

/* ===== Buttons ===== */
.btn {
  display: inline-block; border-radius: 12px; padding: 12px 20px; font-weight: 600;
  text-decoration: none; border: 1px solid var(--border); color: var(--text);
  background: #fff; box-shadow: 0 2px 4px rgba(15,23,42,.06);
  transition: transform .15s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(15,23,42,.1); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }

/* ===== Hero ===== */
.hero {
  padding: 100px 0 80px;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 70%);
  text-align: center;
}
.hero h1 {
  font-size: clamp(30px, 4.5vw, 50px);
  margin: 0 0 16px;
  line-height: 1.2;
}
.hero p {
  max-width: 720px; margin: 0 auto 26px; color: var(--muted); font-size: 1.1rem;
}
.cta .btn { margin: 0 10px; }

/* ===== Sections ===== */
.section { padding: 72px 0; }
.section-alt { background: var(--surface-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-title { font-size: 30px; margin: 0 0 24px; text-align: center; }

/* ===== Cards ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 26px;
  box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(15,23,42,.12); }
.card h3 { margin: 0 0 10px; color: var(--primary); }

/* ===== Why list ===== */
.feature-list { margin: 0 auto; padding-left: 18px; color: var(--muted); max-width: 720px; }
.feature-list li { margin: 10px 0; }

/* ===== Forms ===== */
.contact-form { max-width: 760px; margin: 0 auto; margin-top: 20px; }
.row { display: flex; gap: 18px; flex-wrap: wrap; }
.field { flex: 1; display: flex; flex-direction: column; gap: 6px; min-width: 240px; }
label { font-weight: 600; color: #334155; }
input, textarea {
  width: 100%; padding: 13px 14px; border: 1px solid var(--border); border-radius: 12px; background: #fff; color: var(--text);
  outline: none; transition: border .15s ease, box-shadow .15s ease;
}
input:focus, textarea:focus { border-color: var(--primary-500); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.muted { color: var(--muted); }
.small { font-size: .95rem; }

/* ===== Alerts ===== */
.alert{
  display:none;
  max-width:760px;
  margin:10px auto 16px;
  padding:12px 14px;
  border-radius:12px;
  font-weight:600;
  box-shadow: 0 4px 12px rgba(15,23,42,.06);
}
.alert-success{
  background:#ecfdf5;               /* green-50 */
  color:#065f46;                     /* green-800 */
  border:1px solid #a7f3d0;          /* green-200 */
}
.alert.show{ display:block; }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border); background: #fff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 24px 0; color: var(--muted); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 56px; }
}