@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #0c1f26;
  --color-bg-alt: #0f2c35;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --color-border: rgba(138, 163, 173, 0.18);
  --color-text: #f2f2f2;
  --color-text-muted: #8aa3ad;
  --color-accent: #8aa3ad;
  --color-accent-bright: #a8c0c9;
  --header-height: 64px;
  --section-padding: 5rem;
  --container-max: 1140px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

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

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(160deg, var(--color-bg-alt) 0%, var(--color-bg) 50%, #091820 100%);
  color: var(--color-text);
  line-height: 1.65;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */

header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  height: var(--header-height);
  background: rgba(10, 25, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: box-shadow var(--transition);
}

header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  margin-right: 1.5rem;
}

.logo {
  height: 28px;
  width: auto;
  max-width: 140px;
  display: block;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

nav a:hover,
nav a.active {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.lang-switcher {
  display: flex;
  gap: 4px;
  margin-left: 0.75rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--color-border);
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: inherit;
  transition: var(--transition);
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
  border-radius: 1px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Hero ── */

.hero {
  min-height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
  background:
    linear-gradient(160deg, rgba(10, 25, 32, 0.88) 0%, rgba(12, 31, 38, 0.82) 100%),
    url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31') center/cover no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 3rem clamp(1.25rem, 4vw, 3rem);
}

.hero-short {
  min-height: 280px;
  padding: 4rem clamp(1.25rem, 4vw, 3rem) 3rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 700;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero p {
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2vw, 1.125rem);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.hero-badge {
  display: inline-block;
  margin-bottom: 1.25rem;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent-bright);
  background: rgba(138, 163, 173, 0.12);
  border: 1px solid var(--color-border);
  border-radius: 100px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
}

/* ── Buttons ── */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: var(--color-bg);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 0;
}

.button:hover {
  background: var(--color-accent-bright);
  border-color: var(--color-accent-bright);
  transform: translateY(-1px);
}

.button-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.button-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* ── Sections ── */

.section {
  padding: var(--section-padding) clamp(1.25rem, 4vw, 3rem);
  max-width: var(--container-max);
  margin: 0 auto;
}

.section-alt {
  background: rgba(0, 0, 0, 0.18);
  max-width: 100%;
}

.section-alt > .section-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--section-padding) clamp(1.25rem, 4vw, 3rem);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-lead {
  color: var(--color-text-muted) !important;
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 0 !important;
}

.section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  max-width: 68ch;
}

.section-header + p,
.section > p:not(.section-lead):not(.pricing-disclaimer) {
  max-width: 68ch;
}

/* ── Stats ── */

.stats-section {
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem);
  max-width: var(--container-max);
  margin: -2rem auto 0;
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.stat {
  background: rgba(10, 25, 32, 0.95);
  padding: 1.75rem 1rem;
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent-bright);
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Overview two-column ── */

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.overview-content p {
  margin-bottom: 1rem;
}

.overview-highlights {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.highlight-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.highlight-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(138, 163, 173, 0.1);
  border-radius: var(--radius-sm);
}

.highlight-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.highlight-item p {
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* ── Cards & Grids ── */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  background: var(--color-surface-hover);
  border-color: rgba(138, 163, 173, 0.35);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(138, 163, 173, 0.1);
  border-radius: var(--radius-sm);
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.card p {
  font-size: 0.875rem;
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 0;
}

.card-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--color-accent-bright);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.card-link:hover {
  color: var(--color-text);
}

/* ── Pricing ── */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: rgba(138, 163, 173, 0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.pricing-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.pricing-price {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-accent-bright);
  margin-bottom: 0.5rem;
}

.pricing-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-style: italic;
}

.pricing-features {
  list-style: none;
  margin: 0 0 1.5rem;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 0.4rem 0;
  padding-left: 1.25rem;
  position: relative;
  border-bottom: 1px solid rgba(138, 163, 173, 0.08);
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.75rem;
}

.pricing-card .button {
  width: 100%;
  margin-top: auto;
}

.pricing-disclaimer {
  text-align: center;
  font-size: 0.85rem;
  margin-top: 2rem !important;
  max-width: 100% !important;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ── Banner sections ── */

.students-banner,
.students-cta-section,
.cta-section {
  max-width: 100%;
  background: rgba(0, 0, 0, 0.2);
}

.students-banner-inner,
.students-cta-inner,
.cta-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--section-padding) clamp(1.25rem, 4vw, 3rem);
  text-align: center;
}

.students-banner-inner h2,
.students-cta-inner h2,
.cta-inner h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin-bottom: 0.75rem;
}

.students-banner-inner p,
.students-cta-inner p,
.cta-inner p {
  max-width: 520px;
  margin: 0 auto 1.5rem;
  color: var(--color-text-muted);
}

.students-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ── Industries strip ── */

.industries-section {
  max-width: 100%;
  text-align: center;
  padding: var(--section-padding) clamp(1.25rem, 4vw, 3rem);
  background:
    linear-gradient(160deg, rgba(10, 25, 32, 0.92), rgba(12, 31, 38, 0.88)),
    url('https://images.unsplash.com/photo-1581092919534-9d6a0b6b8e6e') center/cover no-repeat;
}

.industries-section h2 {
  margin-bottom: 0.75rem;
}

.industries-section p {
  max-width: 600px;
  margin: 0 auto 2rem;
}

.industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  max-width: 720px;
  margin: 0 auto;
}

.industry-tag {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: 100px;
}

/* ── About page ── */

.about-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.about-detail-section {
  padding-top: 0;
}

/* ── Contact page ── */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.5rem;
  align-items: start;
}

.contact-item {
  margin-bottom: 1.25rem;
}

.contact-item strong {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.contact-link {
  display: block;
  color: var(--color-accent-bright);
  text-decoration: none;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
  transition: var(--transition);
}

.contact-link:hover {
  color: var(--color-text);
}

.contact-note {
  font-size: 0.875rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.contact-social-title {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.social-whatsapp {
  background: rgba(37, 211, 102, 0.12);
  color: #25d366;
  border: 1px solid rgba(37, 211, 102, 0.25);
}

.social-whatsapp:hover {
  background: rgba(37, 211, 102, 0.22);
}

.social-instagram {
  background: rgba(225, 48, 108, 0.1);
  color: #e1306c;
  border: 1px solid rgba(225, 48, 108, 0.2);
}

.social-instagram:hover {
  background: rgba(225, 48, 108, 0.18);
}

/* ── Forms ── */

form input,
form textarea,
form select {
  width: 100%;
  padding: 0.75rem 1rem;
  margin-bottom: 0.875rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

form input:focus,
form textarea:focus,
form select:focus {
  outline: none;
  border-color: var(--color-accent);
}

form input::placeholder,
form textarea::placeholder {
  color: rgba(138, 163, 173, 0.5);
}

form select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238aa3ad' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

form select option {
  background: var(--color-bg);
  color: var(--color-text);
}

form button {
  width: 100%;
  padding: 0.75rem;
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

form button:hover {
  background: var(--color-accent-bright);
  border-color: var(--color-accent-bright);
}

/* ── Students page ── */

.discount-banner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: linear-gradient(135deg, rgba(138, 163, 173, 0.12), rgba(138, 163, 173, 0.04));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.discount-badge {
  flex-shrink: 0;
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: 50%;
}

.discount-banner h2 {
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
}

.discount-banner p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.students-grid {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

/* ── Footer ── */

footer {
  background: rgba(0, 0, 0, 0.35);
  border-top: 1px solid var(--color-border);
  padding: 3rem clamp(1.25rem, 4vw, 3rem) 2rem;
}

.footer-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

.footer-brand .logo {
  height: 24px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.footer-col a:hover,
.footer-link:hover {
  color: var(--color-text);
}

.footer-bottom {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.footer-bottom p {
  margin-bottom: 0.35rem;
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

/* ── WhatsApp FAB ── */

.whatsapp-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 52px;
  height: 52px;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  z-index: 999;
  transition: transform var(--transition), box-shadow var(--transition);
}

.whatsapp-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.4);
}

/* ── Animations ── */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ── Responsive ── */

@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem;
    --header-height: 56px;
  }

  header {
    padding: 0 1.25rem;
  }

  .logo {
    height: 24px;
    max-width: 120px;
  }

  .menu-toggle {
    display: flex;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(300px, 80vw);
    height: 100vh;
    background: rgba(10, 25, 32, 0.98);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + 1.5rem) 1.5rem 2rem;
    transition: right 0.3s ease;
    backdrop-filter: blur(16px);
    border-left: 1px solid var(--color-border);
    gap: 0.25rem;
  }

  nav.open {
    right: 0;
  }

  nav a {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .lang-switcher {
    margin: 1rem 0 0;
    padding: 1rem 0 0;
    border-left: none;
    border-top: 1px solid var(--color-border);
    justify-content: center;
  }

  .hero {
    min-height: auto;
    padding: 4rem 1.25rem 3rem;
  }

  .stats-section {
    margin-top: 0;
    padding: 2rem 1.25rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .discount-banner {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
  }
}

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

  .stat {
    padding: 1.25rem 0.75rem;
  }

  .stat-number {
    font-size: 1.4rem;
  }

  .hero-buttons,
  .students-cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-buttons .button,
  .students-cta-buttons .button {
    width: 100%;
  }
}