/* ============================================================
   BRAND STYLESHEET - TEACHER IVAN ENGLISH CLASSES
   ============================================================ */

:root {
  --primary-navy: #1A3153;
  --primary-navy-dark: #12223a;
  --accent-amber: #E09B30;
  --accent-amber-hover: #c8831e;
  --soft-blue: #A7C7E7;
  --soft-bg: #F4F8FC;
  --text-dark: #2D3748;
  --text-muted: #64748B;
  --white: #FFFFFF;
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --transition: all 0.3s ease;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --radius-md: 12px;
  --radius-lg: 18px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background-color: var(--white);
  line-height: 1.6;
}

/* Container */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

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

.nav-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--primary-navy);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent-amber);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.6rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background-color: var(--accent-amber);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(224, 155, 48, 0.35);
}

.btn-primary:hover {
  background-color: var(--accent-amber-hover);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: var(--primary-navy-dark);
  transform: translateY(-2px);
}

.btn-outline {
  border: 2px solid var(--primary-navy);
  color: var(--primary-navy);
  background: transparent;
}

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

/* Hero Section */
.hero {
  padding: 4.5rem 0 3.5rem;
  background: linear-gradient(180deg, var(--white) 0%, var(--soft-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background-color: rgba(167, 199, 231, 0.3);
  color: var(--primary-navy);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--primary-navy);
  line-height: 1.2;
  margin-bottom: 1.2rem;
}

.hero h1 span {
  color: var(--accent-amber);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.stat-item h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--primary-navy);
  font-weight: 800;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-image-wrapper {
  text-align: center;
  position: relative;
}

.hero-image-wrapper img {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 15px 25px rgba(26, 49, 83, 0.12));
}

/* Sections Global */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  color: var(--primary-navy);
  margin-bottom: 0.8rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Metodología Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  padding: 2.2rem 1.8rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid #EBF1F6;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--soft-blue);
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background-color: var(--soft-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--primary-navy);
  margin-bottom: 0.7rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Cursos */
.courses {
  background-color: var(--soft-bg);
}

.course-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid #E2E8F0;
  position: relative;
}

.course-card.featured {
  border: 2px solid var(--accent-amber);
}

.featured-tag {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-amber);
  color: var(--white);
  padding: 0.25rem 0.8rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.course-card h3 {
  font-family: var(--font-heading);
  color: var(--primary-navy);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.course-card .level-tag {
  color: var(--accent-amber);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: block;
}

.course-card ul {
  list-style: none;
  margin: 1.5rem 0;
}

.course-card ul li {
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-card ul li::before {
  content: '✓';
  color: #10B981;
  font-weight: bold;
}

/* CTA Banner Final */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-navy) 0%, #203f6d 100%);
  color: var(--white);
  text-align: center;
  padding: 4.5rem 0;
  border-radius: var(--radius-lg);
  margin: 3rem auto;
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: #CBD5E1;
  max-width: 580px;
  margin: 0 auto 2rem;
  font-size: 1.05rem;
}

/* Footer */
footer {
  background-color: var(--primary-navy);
  color: #94A3B8;
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h4 {
  color: var(--white);
  margin-bottom: 1.2rem;
  font-family: var(--font-heading);
}

.footer-col p {
  font-size: 0.9rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.6rem;
}

.footer-col ul li a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--accent-amber);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-description {
    margin: 0 auto 2rem;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}