/* ===================== ROOT ===================== */
:root {
  --primary: #4f46e5;
  --secondary: #06b6d4;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --radius: 18px;
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  --transition: all 0.3s ease;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont;
}

/* ===================== RESET ===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ===================== CONTAINER ===================== */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
}

/* ===================== HEADER ===================== */
.site-header {
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 8px 20px rgba(0,0,0,.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

/* ===================== NAV ===================== */
.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
}

/* ===================== BUTTONS ===================== */
.btn {
  padding: 10px 18px;
  border-radius: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 10px 25px rgba(79,70,229,.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 35px rgba(79,70,229,.45);
}

.btn-ghost {
  background: #e2e8f0;
  color: var(--text);
}

.btn-ghost:hover {
  background: #cbd5f5;
}

/* ===================== MOBILE NAV ===================== */
.mobile-toggle {
  display: none;
  font-size: 1.6rem;
  background: none;
  border: none;
  cursor: pointer;
}

/* ===================== PAGE TITLE ===================== */
main.container h1 {
  text-align: center;
  margin: 60px 0 40px;
  font-size: 2.4rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===================== CONTACT LAYOUT ===================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 40px;
  margin-bottom: 80px;
}

/* ===================== CARD ===================== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
  animation: fadeUp .6s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================== FORM ===================== */
.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--muted);
}

.form-group label i {
  color: var(--primary);
  margin-right: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
  font-size: .95rem;
  transition: var(--transition);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  background: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79,70,229,.15);
}

/* ===================== FILE INFO ===================== */
.form-group small {
  font-size: .75rem;
  color: var(--muted);
  margin-top: 6px;
  display: block;
}

/* ===================== FORM BUTTONS ===================== */
.form-row {
  display: flex;
  gap: 14px;
  margin-top: 10px;
}

.btn-block {
  flex: 1;
}

/* ===================== RESPONSE ===================== */
#response {
  margin-top: 16px;
  font-size: .9rem;
  color: #16a34a;
}

/* ===================== CONTACT INFO ===================== */
.contact-info-card h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.contact-info-card p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .95rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.contact-info-card i {
  color: var(--primary);
  font-size: 1.1rem;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 900px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  main.container h1 {
    font-size: 2rem;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
    box-shadow: 0 12px 30px rgba(0,0,0,.1);
  }

  .main-nav.active {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .card {
    padding: 26px;
  }

  .form-row {
    flex-direction: column;
  }
}