:root {
  --primary: #1E88E5;
  --primary-dark: #1565C0;
  --primary-light: #64B5F6;
  --primary-bg: #E3F2FD;
  --primary-surface: #F5FAFF;
  --text: #263238;
  --text-light: #546E7A;
  --white: #FFFFFF;
  --border: #BBDEFB;
  --shadow: 0 2px 12px rgba(30, 136, 229, 0.12);
  --shadow-hover: 0 6px 24px rgba(30, 136, 229, 0.2);
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition: 0.3s ease;
  --max-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--primary-surface);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--primary-dark);
}

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== HEADER ===== */
.header {
  background: var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--primary-dark);
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  padding: 4px;
}

.nav-toggle-label span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  transition: var(--transition);
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  display: block;
  padding: 8px 16px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav a:hover {
  background: var(--primary-bg);
  color: var(--primary);
}

.nav .btn-nav {
  background: var(--primary);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600;
}

.nav .btn-nav:hover {
  background: var(--primary-dark);
  color: var(--white);
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.92;
  max-width: 680px;
  margin: 0 auto 32px;
}

.btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: var(--primary-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.btn-blue {
  background: var(--primary);
  color: var(--white);
}

.btn-blue:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-lg {
  padding: 14px 40px;
  font-size: 1.05rem;
}

/* ===== SECTIONS ===== */
.section {
  padding: 70px 0;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

/* ===== SERVICES CARDS ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  border: 1px solid var(--border);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}

.service-card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.service-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  margin-bottom: 18px;
}

.service-link {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link::after {
  content: '→';
  transition: transform var(--transition);
}

.service-link:hover::after {
  transform: translateX(4px);
}

/* ===== PLAN CARD ===== */
.plan-section {
  background: var(--white);
}

.plan-card {
  max-width: 500px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 48px 40px;
  color: var(--white);
  text-align: center;
  box-shadow: 0 8px 32px rgba(30, 136, 229, 0.3);
}

.plan-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.plan-price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-price small {
  font-size: 1rem;
  font-weight: 400;
  opacity: 0.8;
}

.plan-desc {
  opacity: 0.9;
  margin-bottom: 28px;
  font-size: 1rem;
}

.plan-features {
  text-align: left;
  margin-bottom: 32px;
}

.plan-features li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.plan-features li::before {
  content: '✓';
  font-weight: 700;
  font-size: 1.1rem;
  opacity: 0.9;
}

.plan-features li:last-child {
  border-bottom: none;
}

.plan-card .btn-primary {
  background: var(--white);
  color: var(--primary);
  padding: 14px 48px;
  font-size: 1.05rem;
}

.plan-card .btn-primary:hover {
  background: var(--primary-bg);
  transform: translateY(-2px);
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-light);
  margin-bottom: 28px;
}

.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 42px;
  height: 42px;
  background: var(--primary-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.contact-item p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--text);
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.15);
}

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

/* ===== FOOTER ===== */
.footer {
  background: var(--text);
  color: rgba(255,255,255,0.8);
  padding: 48px 0 24px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand .logo {
  display: inline-block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.88rem;
  opacity: 0.75;
  max-width: 280px;
}

.footer h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255,255,255,0.65);
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 0.84rem;
  opacity: 0.6;
}

/* ===== AUTH PAGES ===== */
.auth-section {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  flex: 1;
}

.auth-box {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  width: 100%;
  max-width: 440px;
  border: 1px solid var(--border);
}

.auth-box .logo {
  display: block;
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 6px;
}

.auth-box .section-subtitle {
  font-size: 0.92rem;
  margin-bottom: 28px;
}

.auth-box .form-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-light);
}

.auth-box .form-footer a {
  font-weight: 600;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-divider {
  text-align: center;
  margin: 20px 0;
  color: var(--text-light);
  font-size: 0.85rem;
  position: relative;
}

.form-divider::before,
.form-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 42%;
  height: 1px;
  background: var(--border);
}

.form-divider::before { left: 0; }
.form-divider::after { right: 0; }

.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.alert-info {
  background: var(--primary-bg);
  color: var(--primary-dark);
  border: 1px solid var(--border);
}

/* ===== CONTENT PAGES (Terms, Privacy) ===== */
.content-section {
  padding: 60px 0;
  flex: 1;
}

.content-box {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px 44px;
  border: 1px solid var(--border);
  max-width: 860px;
  margin: 0 auto;
}

.content-box h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.content-box .updated {
  color: var(--text-light);
  font-size: 0.88rem;
  margin-bottom: 32px;
}

.content-box h2 {
  font-size: 1.3rem;
  margin: 28px 0 12px;
  color: var(--primary-dark);
}

.content-box h3 {
  font-size: 1.1rem;
  margin: 20px 0 10px;
}

.content-box p {
  margin-bottom: 14px;
  color: var(--text-light);
}

.content-box ul {
  margin: 10px 0 18px 24px;
  list-style: disc;
}

.content-box ul li {
  margin-bottom: 6px;
  color: var(--text-light);
}

/* ===== SERVICE PAGES ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 60px 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.page-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.service-detail-grid.reverse {
  direction: rtl;
}

.service-detail-grid.reverse > * {
  direction: ltr;
}

.service-detail-text h2 {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.service-detail-text p {
  color: var(--text-light);
  margin-bottom: 14px;
}

.service-detail-text ul {
  margin: 12px 0 20px;
}

.service-detail-text ul li {
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-detail-text ul li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
}

.service-detail-image {
  background: var(--primary-bg);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  font-size: 4rem;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}

/* ===== MENTORIA ===== */
.mentor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.mentor-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}

.mentor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.mentor-icon {
  width: 72px;
  height: 72px;
  background: var(--primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 2rem;
}

.mentor-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.mentor-card .mentor-desc {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.mentor-card .mentor-tag {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  margin: 2px 3px;
}

.mentor-card .mentor-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin: 16px 0;
}

.mentor-card .mentor-price small {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-light);
}

.formvalidation-error {
    color: #ef4444;
    font-size: 14px;
    margin-top: 4px;
}

.formvalidation-success {
    color: #22c55e;
    margin-top: 15px;
    text-align: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .service-detail-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .service-detail-grid.reverse {
    direction: ltr;
  }

  .mentor-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    padding: 16px 20px;
    display: none;
    border-top: 1px solid var(--border);
  }

  .nav ul {
    flex-direction: column;
    gap: 4px;
  }

  .nav a {
    padding: 12px 16px;
    width: 100%;
  }

  .nav-toggle:checked ~ .nav {
    display: block;
  }

  .hero {
    padding: 56px 0 44px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .plan-card {
    padding: 32px 24px;
  }

  .plan-price {
    font-size: 2.4rem;
  }

  .auth-box {
    padding: 32px 24px;
  }

  .content-box {
    padding: 28px 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .mentor-grid {
    grid-template-columns: 1fr;
  }

  .section-subtitle {
    margin-bottom: 32px;
    font-size: 0.95rem;
  }

  .page-hero h1 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .btn-lg {
    padding: 12px 32px;
    font-size: 0.95rem;
  }

  .service-detail-image {
    padding: 32px 20px;
    font-size: 3rem;
    aspect-ratio: auto;
    min-height: 160px;
  }
}