/* ============================================
   BRIMSCHOOL UK - Main Stylesheet
   Modern, clean, mobile-first responsive design
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1a365d;
  --color-primary-light: #2a4a7f;
  --color-primary-dark: #0f2340;
  --color-accent: #3182ce;
  --color-accent-light: #63a4e8;
  --color-accent-hover: #2563a0;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-text-inverse: #ffffff;
  --color-bg: #ffffff;
  --color-bg-light: #f7fafc;
  --color-bg-alt: #edf2f7;
  --color-border: #e2e8f0;
  --color-success: #38a169;
  --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Courier New', monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
  --max-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-accent-light);
  outline-offset: 2px;
}

ul {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 700;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.text-center {
  text-align: center;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-text-inverse);
}

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

.btn-outline:hover {
  background-color: var(--color-text-inverse);
  color: var(--color-primary);
}

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline-dark:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

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

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

/* Desktop nav */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

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

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

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-inverse);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  color: var(--color-text-inverse);
  margin-bottom: 1.25rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 580px;
  margin: 0 auto 2rem;
  line-height: 1.8;
}

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

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

.section-alt {
  background-color: var(--color-bg-light);
}

/* --- About Snippet (homepage) --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

/* --- Products / Apps --- */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.product-icon {
  width: 64px;
  height: 64px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.product-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.product-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background-color: var(--color-bg-alt);
  color: var(--color-accent);
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-inverse);
  text-align: center;
  padding: 3.5rem 0;
}

.cta-banner h2 {
  color: var(--color-text-inverse);
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.page-header {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  text-align: center;
  padding: 3rem 0;
}

.page-header h1 {
  color: var(--color-text-inverse);
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  opacity: 0.85;
  max-width: 540px;
  margin: 0 auto;
}

/* Mission / Vision cards */
.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.value-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 2rem;
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.value-card h3 {
  margin-bottom: 0.5rem;
}

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

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.team-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition);
}

.team-card:hover {
  box-shadow: var(--shadow-md);
}

.team-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-accent);
  font-weight: 700;
}

.team-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
}

.team-card .role {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

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

/* Contact info */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent);
}

.contact-item h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.contact-item p,
.contact-item a {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* ============================================
   PRIVACY POLICY PAGE
   ============================================ */
.policy-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

.policy-content .last-updated {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.policy-content h2 {
  font-size: 1.4rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-top: 1rem;
}

.policy-content h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.policy-content p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

.policy-content ul,
.policy-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.policy-content li {
  list-style: disc;
  margin-bottom: 0.4rem;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.policy-content ol li {
  list-style: decimal;
}

.policy-content a {
  word-break: break-all;
}

.app-screenshot-placeholder {
  width: 100%;
  min-height: 200px;
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin: 1.5rem 0;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 3rem 0 1.5rem;
}

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

.footer-col h4 {
  color: var(--color-text-inverse);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

.footer-col ul a:hover {
  color: var(--color-text-inverse);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet (640px+) */
@media (min-width: 640px) {
  .hero h1 {
    font-size: 3rem;
  }

  .section-title {
    font-size: 2.25rem;
  }

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

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

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

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

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

/* Desktop (900px+) */
@media (min-width: 900px) {
  .hero {
    padding: 6rem 0;
  }

  .hero h1 {
    font-size: 3.25rem;
  }

  .section {
    padding: 5.5rem 0;
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* Mobile nav */
@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1.5rem;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .nav-links a::after {
    display: none;
  }
}

/* --- App Showcase --- */
.apps-grid {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.app-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  text-align: center;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.app-card h3 {
  font-size: 1.1rem;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

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

.app-showcase {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.app-showcase-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.app-screenshots {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.app-screenshot {
  width: 280px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

@media (max-width: 639px) {
  .app-screenshot {
    width: 100%;
    max-width: 320px;
  }
}

/* Large screens (1200px+) */
@media (min-width: 1200px) {
  :root {
    --max-width: 1200px;
  }

  .hero h1 {
    font-size: 3.5rem;
  }
}