/* ============================================
   Umanisi — Online AI School for Kids
   styles.css — shared styles for all pages
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg: #fafafe;
  --surface-1: #f0f0f6;
  --surface-2: #e8e8f2;
  --accent: #6c63ff;
  --accent-2: #00b894;
  --text: #1a1a2e;
  --text-secondary: #6b6b8d;
  --card-border: rgba(108,99,255,0.15);
  --card-bg: rgba(255,255,255,0.7);
  --radius: 12px;
  --radius-sm: 8px;
  --max-w: 1200px;
  --transition: .3s ease;
  --glow: 0 0 30px rgba(108,99,255,0.12);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-2); }

img { max-width: 100%; display: block; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

p { color: var(--text-secondary); }

/* --- Utility --- */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-title { margin-bottom: 16px; }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 48px; max-width: 600px; }
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* --- Grid Background --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(108,99,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,99,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(108,99,255,0.25);
}
.btn-primary:hover {
  background: #7b73ff;
  color: #fff;
  box-shadow: 0 6px 20px rgba(108,99,255,0.35);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-ghost:hover {
  background: rgba(108,99,255,0.1);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-disabled {
  background: var(--surface-2);
  color: var(--text-secondary);
  cursor: default;
  pointer-events: none;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(250,250,254,0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.nav-logo:hover { color: var(--text); }

.nav-logo svg { width: 32px; height: 32px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: .95rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions .btn { padding: 10px 20px; font-size: .9rem; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all var(--transition);
  border-radius: 2px;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(250,250,254,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--text);
}

.mobile-menu a:hover { color: var(--accent); }

.mobile-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 2rem;
  cursor: pointer;
}

.burger span {
  background: var(--text);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { position: relative; z-index: 2; }

.hero h1 {
  margin-bottom: 24px;
  background: linear-gradient(135deg, #1a1a2e 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 36px;
  max-width: 500px;
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual svg { width: 100%; max-width: 500px; height: auto; }

/* Glow orb behind hero */
.hero::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(108,99,255,0.08) 0%, transparent 70%);
  top: 20%;
  right: -10%;
  pointer-events: none;
}

/* --- Cards --- */
.card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.card:hover {
  border-color: rgba(108,99,255,0.35);
  box-shadow: 0 8px 30px rgba(108,99,255,0.1);
  transform: translateY(-4px);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.card h3 { margin-bottom: 12px; }
.card p { font-size: .95rem; }

/* --- Lesson Card --- */
.lesson-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.lesson-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity var(--transition);
}

.lesson-card:hover {
  border-color: rgba(108,99,255,0.35);
  box-shadow: 0 8px 30px rgba(108,99,255,0.1);
  transform: translateY(-4px);
}

.lesson-card:hover::before { opacity: 1; }

.lesson-number {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.lesson-icon { font-size: 1.6rem; margin-bottom: 12px; }

.lesson-title {
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-family: var(--font-heading);
  color: var(--text);
}

.lesson-desc {
  font-size: .9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.badge-soon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(108,99,255,0.06);
  border: 1px solid rgba(108,99,255,0.15);
  border-radius: 20px;
  font-size: .8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* --- Module Header --- */
.module-header {
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--card-border);
}

.module-label {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.module-header h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.module-header p { font-size: .95rem; }

.module-section { margin-bottom: 64px; }

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

/* --- Pricing Card --- */
.pricing-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 48px;
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.pricing-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.pricing-price {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.pricing-price span { font-size: 1rem; color: var(--text-secondary); font-weight: 400; }

.pricing-note {
  font-size: .9rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 10px 0;
  border-bottom: 1px solid #eeeef4;
  color: var(--text);
  font-size: .95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li .check {
  color: var(--accent-2);
  font-weight: 700;
}

.pricing-card .btn { width: 100%; justify-content: center; }

.pricing-cancel {
  margin-top: 12px;
  font-size: .85rem;
  color: var(--text-secondary);
}

/* --- FAQ Accordion --- */
.faq-list { max-width: 720px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--card-border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 20px 0;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--accent); }

.faq-question .icon {
  font-size: 1.2rem;
  transition: transform var(--transition);
  color: var(--text-secondary);
}

.faq-item.open .faq-question .icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: .95rem;
  line-height: 1.7;
}

/* --- Features List --- */
.features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(108,99,255,0.08);
  border-radius: 10px;
}

.feature-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--text);
}

.feature-item p { font-size: .9rem; }

/* --- Blog Card --- */
.blog-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.blog-card:hover {
  border-color: rgba(108,99,255,0.35);
  box-shadow: 0 8px 30px rgba(108,99,255,0.1);
  transform: translateY(-4px);
}

.blog-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--surface-1), var(--surface-2));
  position: relative;
  overflow: hidden;
}

.blog-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(108,99,255,0.12), rgba(0,184,148,0.08));
}

.blog-body { padding: 24px; }

.blog-date {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.blog-card h3 { font-size: 1.1rem; margin-bottom: 12px; }

.blog-card .btn { padding: 8px 16px; font-size: .85rem; }

/* --- Contact Form --- */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid #d0d0e0;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}

.form-group textarea { min-height: 140px; resize: vertical; }

/* --- Filter Tags --- */
.filter-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-tag {
  padding: 8px 18px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid #d0d0e0;
  color: var(--text-secondary);
  font-size: .9rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}

.filter-tag:hover, .filter-tag.active {
  background: rgba(108,99,255,0.08);
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Footer --- */
.footer {
  background: #f4f4fa;
  border-top: 1px solid #e0e0ec;
  padding: 60px 0 30px;
}

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

.footer-brand p {
  font-size: .9rem;
  margin-top: 12px;
  max-width: 280px;
}

.footer h4 {
  font-size: .95rem;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: .9rem; }
.footer-links a:hover { color: var(--text); }

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: #fff;
  border: 1px solid #d0d0e0;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #e0e0ec;
  font-size: .85rem;
  color: var(--text-secondary);
}

/* --- Page Header --- */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  position: relative;
}

.page-header::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(108,99,255,0.06) 0%, transparent 70%);
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.page-header h1 { margin-bottom: 16px; }
.page-header p { font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* --- Stats --- */
.stats-row {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: .85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Quote Block --- */
.quote-block {
  background: #fff;
  border: 1px solid var(--card-border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 32px 40px;
  margin: 48px 0;
  max-width: 720px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.quote-block p {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text);
  line-height: 1.7;
}

/* --- Skills List --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.skill-item .check { color: var(--accent-2); font-size: 1.1rem; }
.skill-item span { font-size: .95rem; color: var(--text); }

/* --- Teacher Card --- */
.teacher-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.teacher-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }

  .nav-links, .nav-actions { display: none; }
  .burger { display: flex; }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .hero-visual { order: -1; max-width: 300px; margin: 0 auto; }

  .cards-grid { grid-template-columns: 1fr; }
  .lessons-grid { grid-template-columns: 1fr; }
  .features-list { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand p { margin-left: auto; margin-right: auto; }
  .footer-social { justify-content: center; }

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

  .stats-row { gap: 24px; }

  .quote-block { padding: 24px; }

  h1 { font-size: 2rem; }
}