/*
  School ERP Landing - Global Styles
  - Mobile-first, modern UI (2025 look)
  - Pastel palette, lots of whitespace
  - Utilities for grids, cards, spacing, and animations
*/

:root {
  --color-bg: #ffffff;
  --color-text: #102a43; /* deep slate */
  --color-muted: #486581; /* muted slate */
  --color-primary: #4f9cff; /* pastel blue */
  --color-primary-600: #2f80ed;
  --color-secondary: #4ad1a8; /* pastel green */
  --color-accent: #ffd166; /* warm accent */
  --color-border: #e6eff7;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 12px rgba(16, 42, 67, 0.06);
  --shadow-md: 0 12px 30px rgba(16, 42, 67, 0.12);
  --max-w: 1200px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: 'Inter', 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji';
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header / Navbar */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand img {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: none;
  gap: 18px;
  align-items: center;
}

.nav-links a {
  color: var(--color-muted);
  font-weight: 500;
}

.nav-cta {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 0;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-600));
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: white;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.hamburger {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: white;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.95);
}

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

.mobile-menu a {
  display: block;
  padding: 14px 20px;
  color: var(--color-muted);
  border-top: 1px dashed var(--color-border);
}

/* Hero */
.hero {
  padding: 64px 0 24px;
  background: linear-gradient(180deg, #f7fbff 0%, #ffffff 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-primary-600);
  background: #eaf3ff;
  padding: 6px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 12px 0;
}

.hero p {
  color: var(--color-muted);
  margin: 0 0 22px 0;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-illus {
  background: linear-gradient(145deg, #eaf3ff, #e9fff7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.hero-illus img {
  border-radius: 12px;
}

/* Sections */
section {
  padding: 48px 0;
}

.section-header {
  margin-bottom: 20px;
}

.section-header h2 {
  margin: 0 0 8px 0;
  font-size: 24px;
}

.section-header p {
  margin: 0;
  color: var(--color-muted);
}

/* Grid / Cards */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  color: #0b6efd;
  background: #eaf3ff;
}

.muted {
  color: var(--color-muted);
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.price-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: white;
  box-shadow: var(--shadow-sm);
  padding: 18px;
}

.price-tier {
  font-weight: 700;
  margin: 0 0 4px 0;
}

.price-value {
  font-size: 28px;
  font-weight: 800;
  margin: 4px 0 10px 0;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 14px 0;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}

/* Testimonials */
.carousel {
  position: relative;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.testimonial {
  min-width: 100%;
  padding: 18px;
}

.testimonial blockquote {
  margin: 0 0 10px 0;
  font-size: 18px;
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d7e6fa;
  border: 0;
}

.dot.active {
  background: var(--color-primary-600);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.input, .textarea, .select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  background: #fbfdff;
  padding: 24px 0;
  color: var(--color-muted);
}

.footer a {
  color: var(--color-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: center;
}

.socials {
  display: flex;
  gap: 10px;
}

.socials a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: white;
}

/* Utilities */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: white;
  color: var(--color-muted);
  font-size: 12px;
}

.spacer-sm { height: 8px; }
.spacer-md { height: 16px; }
.spacer-lg { height: 28px; }
.spacer-xl { height: 48px; }

.bg-subtle {
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }

.rounded { border-radius: var(--radius-md); }

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

.hidden { display: none !important; }

/* Responsive */
@media (min-width: 640px) {
  .hero h1 { font-size: 40px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1.2fr 1fr; }
}

@media (min-width: 960px) {
  .nav-links { display: inline-flex; }
  .nav-cta { display: inline-flex; }
  .hamburger { display: none; }
  .hero { padding: 90px 0 36px; }
  .hero-grid { grid-template-columns: 1.2fr 1fr; gap: 36px; }
  .grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr auto 1fr; }
}