/* --- Variables --- */
:root {
  --bg: #fafbfc;
  --surface: #ffffff;
  --surface2: #f1f5f9;
  --text: #1e293b;
  --text-muted: #64748b;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-light: #ccfbf1;
  --success: #059669;
  --border: #e2e8f0;
  --radius: 10px;
  --radius-lg: 16px;
  --font: 'Plus Jakarta Sans', system-ui, sans-serif;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s;
}
.header.scrolled { box-shadow: var(--shadow); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.logo:hover { color: var(--accent-hover); }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  align-items: center;
}
.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}
.nav a:hover { color: var(--accent); background: var(--accent-light); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: var(--radius);
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: 5.5rem 0 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13,148,136,0.85) 0%, rgba(13,148,136,0.7) 50%, rgba(0,0,0,0.6) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.hero-title {
  font-size: clamp(1.85rem, 4.5vw, 2.85rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
  animation: fadeInUp 0.8s ease;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,0.95);
  margin: 0 0 0.5rem;
  animation: fadeInUp 0.8s ease 0.1s both;
}
.hero-dates {
  color: rgba(255,255,255,0.9);
  margin-bottom: 1.75rem;
  font-size: 1rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-dates strong { color: #fff; }
.hero .btn-primary {
  animation: fadeInUp 0.8s ease 0.3s both;
  background: #fff;
  color: var(--accent);
  box-shadow: var(--shadow);
}
.hero .btn-primary:hover {
  background: var(--surface2);
  color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(13,148,136,0.35);
}
.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* --- Sections --- */
.section {
  padding: 4rem 0;
  background: var(--surface);
}
.section:nth-child(even) { background: var(--bg); }
.section-title {
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.section-lead {
  color: var(--text-muted);
  margin: 0 0 2.25rem;
  max-width: 560px;
  font-size: 1.05rem;
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.about-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: box-shadow 0.25s, border-color 0.25s;
}
.about-block:hover {
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.about-block h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.about-block p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* --- Cards with images --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.card-img-wrap {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--surface2);
}
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.card:hover .card-img-wrap img { transform: scale(1.05); }
.card h3 {
  font-size: 1.15rem;
  margin: 1rem 1.25rem 0.4rem;
}
.card p {
  color: var(--text-muted);
  margin: 0 1.25rem 1.25rem;
  font-size: 0.95rem;
}

/* --- Test details --- */
.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.detail-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: box-shadow 0.25s, transform 0.25s;
}
.detail-block:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.detail-block h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
  color: var(--accent);
}
.detail-block p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* --- Register form --- */
.register-section { background: linear-gradient(180deg, var(--surface2) 0%, var(--bg) 100%); padding: 4rem 0; }
.register-form {
  max-width: 560px;
  margin: 0 auto;
  background: var(--surface);
  padding: 2.25rem 2.5rem;
  border-radius: 20px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.08), 0 2px 12px rgba(0,0,0,0.04);
  border: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}
.register-form:focus-within { box-shadow: 0 12px 48px rgba(13,148,136,0.12), 0 4px 16px rgba(0,0,0,0.06); }

/* Step indicator */
.step-indicator { margin-bottom: 2rem; }
.step-track {
  height: 4px;
  background: var(--surface2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1rem;
}
.step-track-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 999px;
  width: 33.33%;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.step-indicator .step-pills { display: flex; justify-content: space-between; gap: 0.5rem; }
.step-indicator .step-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--surface2);
  color: var(--text-muted);
  transition: background 0.3s, color 0.3s, transform 0.2s;
  flex: 1;
  justify-content: center;
  max-width: 180px;
}
.step-indicator .step-pill.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(13,148,136,0.35);
}
.step-indicator .step-pill .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  font-size: 0.8rem;
  font-weight: 700;
}
.step-indicator .step-pill.active .step-num { background: rgba(255,255,255,0.3); }
.step-indicator .step-pill .step-label { white-space: nowrap; }
@media (max-width: 480px) {
  .step-indicator .step-pill .step-label { display: none; }
  .step-indicator .step-pill { max-width: none; }
}

.reg-step { animation: regStepIn 0.35s ease; }
@keyframes regStepIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.reg-step-inner { margin-bottom: 0.5rem; }

.form-row { display: grid; gap: 1rem; }
.form-row-2 { grid-template-columns: 1fr 1fr; }
.form-group {
  margin-bottom: 1.25rem;
}
.form-group-sm { margin-bottom: 1rem; max-width: 140px; }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
  color: var(--text);
}
.form-group .required { color: #dc2626; }
.form-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover { border-color: #cbd5e1; }
.form-group textarea { resize: vertical; min-height: 88px; }
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-position: right 1rem center;
  background-repeat: no-repeat;
  padding-right: 2.5rem;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
  background: var(--surface);
}

.form-info-block {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}
.form-info-block p { margin: 0 0 0.5rem; font-size: 0.9rem; color: var(--text-muted); }
.form-info-block p:last-child { margin-bottom: 0; }

.form-group-checkbox { margin-bottom: 1.25rem; }
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text);
}
.checkbox-label input[type="checkbox"] {
  width: 1.2rem;
  height: 1.2rem;
  margin-top: 0.15rem;
  accent-color: var(--accent);
  flex-shrink: 0;
}
.checkbox-text { line-height: 1.5; color: var(--text-muted); }

.form-actions { margin-top: 1.75rem; margin-bottom: 0.5rem; }
.form-actions .btn { min-width: 140px; }
.form-actions-split {
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  flex-wrap: wrap;
}
.form-actions-split .btn:first-child { margin-right: auto; }
.form-actions-split .btn:last-child { margin-left: auto; }
.btn-next { padding-left: 1.25rem; padding-right: 1.25rem; }
.btn-arrow { opacity: 0.9; margin-left: 0.25rem; }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { background: var(--surface2); border-color: var(--text-muted); color: var(--text); }
.form-note { font-size: 0.9rem; color: var(--text-muted); margin: 1rem 0 0; }

/* --- FAQ --- */
.accordion { max-width: 640px; margin: 0 auto; }
.accordion-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.accordion-item:hover { border-color: var(--accent); }
.accordion-item[open] { box-shadow: var(--shadow); }
.accordion-item summary {
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}
.accordion-item summary:hover { background: var(--bg); }
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform 0.3s;
}
.accordion-item[open] summary::after { content: '−'; }
.accordion-item p {
  padding: 0 1.25rem 1.25rem;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-item strong { display: block; margin-bottom: 0.25rem; font-size: 0.9rem; color: var(--text); }
.contact-item a, .contact-item p { color: var(--text-muted); margin: 0; text-decoration: none; }
.contact-item a:hover { color: var(--accent); text-decoration: underline; }
.contact-form {
  background: var(--bg);
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

/* --- Footer --- */
.footer {
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.footer p { margin: 0; font-size: 0.9rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }

/* --- Policy pages --- */
.page-header {
  padding: 5.5rem 0 2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin: 0; font-size: 1.75rem; }
.page-content {
  padding: 2.5rem 0 4rem;
  max-width: 720px;
  margin: 0 auto;
}
.page-content h2 { font-size: 1.25rem; margin: 2rem 0 0.75rem; }
.page-content p, .page-content li { color: var(--text-muted); margin: 0 0 0.75rem; line-height: 1.7; }
.page-content ul { padding-left: 1.5rem; }
.page-content a { color: var(--accent); }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 1rem;
}
.back-link:hover { text-decoration: underline; }

/* --- Mobile --- */
@media (max-width: 768px) {
  .header-inner { height: 56px; }
  .nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 1.25rem;
    gap: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }
  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav a { padding: 0.75rem; border-radius: var(--radius); }
  .nav-toggle { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
  .register-form { padding: 1.5rem 1.25rem; }
  .step-indicator .step-pills { flex-wrap: wrap; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .hero { padding: 4.5rem 0 3rem; min-height: 90vh; }
  .section { padding: 3rem 0; }
  .register-form { padding: 1.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .hero-title { font-size: 1.65rem; }
  .cards { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}