/* Top Tech Computer College — global styles */

:root {
  --blue-900: #0a1628;
  --blue-800: #0f2744;
  --blue-700: #1e3a5f;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --white: #ffffff;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-500: #64748b;
  --gray-700: #334155;
  --error: #dc2626;
  --success: #059669;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-display: "Outfit", var(--font-sans);
  --shadow-sm: 0 1px 2px rgba(10, 22, 40, 0.06);
  --shadow-md: 0 4px 20px rgba(10, 22, 40, 0.08);
  --shadow-lg: 0 12px 40px rgba(10, 22, 40, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-h: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-bg::before,
  .hero-bg::after {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-700);
  background: var(--white);
  padding-top: var(--header-h);
}

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

a {
  color: var(--blue-600);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--blue-500);
}

.container {
  width: 100%;
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container.narrow {
  max-width: 720px;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--blue-900);
  letter-spacing: -0.02em;
  line-height: 1.25;
  max-width: 290px;
}

.logo-img {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--blue-200, #bfdbfe), 0 6px 18px rgba(10, 22, 40, 0.2);
  flex-shrink: 0;
  transition: transform var(--transition), box-shadow var(--transition);
}

.logo:hover .logo-img {
  transform: scale(1.06);
  box-shadow: 0 0 0 2px var(--blue-500), 0 8px 24px rgba(37, 99, 235, 0.25);
}

.logo:hover {
  color: var(--blue-600);
}

.logo-footer {
  color: var(--white);
  max-width: none;
}

.logo-footer:hover {
  color: var(--blue-100);
}

.nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--gray-700);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--blue-600);
  background: var(--blue-50);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle:hover {
  background: var(--blue-50);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--blue-900);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 0.875rem 1rem;
  }

  .logo {
    max-width: 220px;
    font-size: 0.96rem;
  }

  .logo-img {
    width: 36px;
    height: 36px;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  color: var(--white);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--blue-50);
  color: var(--blue-700);
  border-color: var(--blue-100);
}

.btn-secondary:hover {
  background: var(--blue-100);
  color: var(--blue-800);
}

.btn-outline {
  background: transparent;
  color: var(--blue-600);
  border-color: var(--blue-600);
}

.btn-outline:hover {
  background: var(--blue-50);
  color: var(--blue-700);
}

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

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-full {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  min-height: min(560px, calc(100vh - var(--header-h)));
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, var(--blue-50) 0%, var(--white) 45%, var(--blue-100) 100%);
  z-index: 0;
}

.hero-bg::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 55%;
  max-width: 520px;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero-bg::after {
  content: "";
  position: absolute;
  bottom: -15%;
  left: -5%;
  width: 40%;
  max-width: 400px;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(30, 58, 95, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(12px, -16px); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.project-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  margin: 0 0 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow-sm);
  color: var(--blue-700);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  min-height: 280px;
  max-height: min(420px, 50vh);
}

.hero-img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  max-height: min(420px, 50vh);
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.5s ease;
}

.hero-image-wrap:hover .hero-img {
  transform: scale(1.03);
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-image-wrap {
    order: -1;
    max-height: 260px;
    min-height: 200px;
  }

  .hero-img {
    min-height: 200px;
    max-height: 260px;
  }

  .hero-content {
    max-width: none;
  }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--blue-900);
  margin: 0 0 0.5rem;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--gray-500);
  margin: 0 0 1.75rem;
  max-width: 540px;
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: var(--gray-100);
}

.section-header {
  text-align: center;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-600);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  color: var(--blue-900);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.section-desc {
  margin: 0;
  color: var(--gray-500);
}

/* Course cards */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.course-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-100);
}

.course-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-50);
  color: var(--blue-600);
  border-radius: 12px;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.course-card-icon-code {
  font-family: ui-monospace, monospace;
  font-weight: 600;
  letter-spacing: 0.05em;
  font-size: 1.1rem;
}

.course-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--blue-900);
  margin: 0 0 0.75rem;
}

.course-card-desc {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--gray-500);
  flex-grow: 1;
}

.course-card .btn {
  margin-top: auto;
}

/* About preview */
.about-preview {
  background: linear-gradient(180deg, var(--white) 0%, var(--blue-50) 100%);
}

.about-preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-preview-content .section-title {
  text-align: left;
}

.about-preview-content .section-tag {
  margin-bottom: 0.5rem;
}

.about-preview-content p {
  margin: 0 0 1.5rem;
  color: var(--gray-500);
}

.about-preview-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
}

.about-preview-img {
  width: 100%;
  height: auto;
  min-height: 240px;
  max-height: 360px;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.5s ease;
}

.about-preview-visual:hover .about-preview-img {
  transform: scale(1.02);
}

@media (max-width: 900px) {
  .about-preview-grid {
    grid-template-columns: 1fr;
  }

  .about-preview-visual {
    min-height: 200px;
    order: -1;
  }
}

/* Principal */
.principal-section {
  background: var(--white);
}

.principal-inner {
  display: grid;
  grid-template-columns: minmax(200px, 280px) 1fr;
  gap: 2.5rem;
  align-items: start;
}

.principal-photo {
  background: linear-gradient(180deg, var(--blue-50), var(--white));
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 0.6rem;
  box-shadow: var(--shadow-sm);
}

.principal-img {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4/5;
  object-fit: cover;
  object-position: center top;
  border-radius: calc(var(--radius-lg) - 6px);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  display: block;
  transition: transform var(--transition), box-shadow var(--transition);
  margin-left: auto;
  margin-right: auto;
}

.principal-photo:hover .principal-img {
  transform: scale(1.015);
  box-shadow: var(--shadow-lg);
}

.principal-quote {
  margin: 0;
  padding: 0;
  border: none;
}

.principal-quote p {
  margin: 0 0 1rem;
  color: var(--gray-700);
  font-style: italic;
}

.principal-quote p:last-of-type {
  margin-bottom: 0;
}

.principal-signature {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--gray-200);
}

.principal-signature strong {
  display: block;
  color: var(--blue-900);
  font-style: normal;
}

.principal-signature span {
  font-size: 0.875rem;
  color: var(--gray-500);
}

@media (max-width: 768px) {
  .principal-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .principal-photo {
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
    padding: 0.5rem;
  }

  .principal-message .section-title,
  .principal-message .section-tag {
    text-align: center;
  }
}

/* Page hero (inner pages) */
.page-hero {
  background: linear-gradient(135deg, var(--blue-800) 0%, var(--blue-900) 100%);
  color: var(--white);
  padding: 3rem 0 3.5rem;
  text-align: center;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.page-subtitle {
  margin: 0;
  opacity: 0.88;
  font-size: 1.0625rem;
}

.about-page-photo-section {
  padding-top: 2rem;
  padding-bottom: 0;
}

.about-page-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
}

.about-page-img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* Prose & MV cards */
.prose h2 {
  font-family: var(--font-display);
  color: var(--blue-900);
  margin-top: 0;
}

.prose p:last-child {
  margin-bottom: 0;
}

.mission-vision-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.mv-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.mv-icon {
  font-size: 1.5rem;
  color: var(--blue-600);
  margin-bottom: 1rem;
}

.mv-card h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--blue-900);
  margin: 0 0 0.75rem;
}

.mv-card p {
  margin: 0;
  color: var(--gray-500);
}

.feature-list {
  padding-left: 1.25rem;
  margin: 0;
}

.feature-list li {
  margin-bottom: 0.75rem;
  color: var(--gray-700);
}

.feature-list li:last-child {
  margin-bottom: 0;
}

.cta-banner {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: var(--white);
  text-align: center;
}

.cta-banner h2 {
  font-family: var(--font-display);
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
}

.cta-banner p {
  margin: 0 0 1.5rem;
  opacity: 0.92;
}

.cta-banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* Contact */
.contact-section {
  padding-top: 3rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 {
  font-family: var(--font-display);
  color: var(--blue-900);
  margin: 0 0 0.75rem;
}

.contact-lead {
  color: var(--gray-500);
  margin: 0 0 2rem;
}

.contact-details {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-details li {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blue-600);
}

.contact-details a {
  color: var(--gray-700);
  font-weight: 500;
}

.contact-details a:hover {
  color: var(--blue-600);
}

.contact-form-wrap {
  background: var(--gray-100);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
}

.contact-form .form-group {
  margin-bottom: 1.25rem;
}

.contact-form label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--blue-900);
  margin-bottom: 0.375rem;
}

.required {
  color: var(--error);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.contact-form input.invalid,
.contact-form textarea.invalid {
  border-color: var(--error);
}

.field-error {
  display: block;
  font-size: 0.8125rem;
  color: var(--error);
  margin-top: 0.35rem;
  min-height: 1.2em;
}

.form-success {
  margin-top: 1rem;
  padding: 0.875rem 1rem;
  background: rgba(5, 150, 105, 0.1);
  color: var(--success);
  border-radius: var(--radius);
  font-weight: 500;
  text-align: center;
}

.form-error-global {
  margin-top: 1rem;
  padding: 0.875rem 1rem;
  background: rgba(220, 38, 38, 0.08);
  color: var(--error);
  border-radius: var(--radius);
  font-size: 0.875rem;
  text-align: left;
}

@media (max-width: 900px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

/* Footer */
.footer {
  background: var(--blue-900);
  color: var(--gray-200);
  padding: 3rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
}

.footer-tagline {
  margin: 0.5rem 0 1.25rem;
  font-size: 0.9375rem;
  opacity: 0.85;
}

.social-links {
  display: flex;
  gap: 0.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border-radius: 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.social-link:hover {
  background: var(--blue-600);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--white);
  margin: 0 0 1rem;
}

.footer-links,
.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links li,
.footer-contact li {
  margin-bottom: 0.5rem;
}

.footer-links a,
.footer-contact a {
  color: var(--gray-200);
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-bottom-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer-bottom p {
  margin: 0;
}

.footer-credit {
  font-size: 0.8125rem;
  opacity: 0.75;
}

.footer-credit a {
  color: var(--blue-400);
  font-weight: 500;
}

.footer-credit a:hover {
  color: var(--white);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }