/* =============================================
   PAT PAT IELTS — DESIGN SYSTEM (UPDATED)
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --primary: #c06987;
  --primary-dark: #9e4b67;
  --primary-light: #d68ca4;
  --primary-lighter: #f2d6e0;
  
  --bg-main: #f1efeb;
  --bg-surface: #ffffff;
  --bg-accent: #f8f6f3;
  --bg-dark: #2c1f24;

  --text-main: #2c1f24;
  --text-muted: #6b5c62;
  --text-light: #9e8e94;
  --text-white: #ffffff;

  --border-color: rgba(192, 105, 135, 0.15);
  --border-light: rgba(44, 31, 36, 0.08);

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  --shadow-sm: 0 4px 12px rgba(44, 31, 36, 0.04);
  --shadow-md: 0 8px 24px rgba(192, 105, 135, 0.12);
  --shadow-lg: 0 16px 40px rgba(44, 31, 36, 0.1);
  --shadow-card: 0 10px 30px rgba(44, 31, 36, 0.05);

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

/* Line Art Icons Helper */
.line-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  stroke-width: 1.75;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(192, 105, 135, 0.1);
  color: var(--primary-dark);
  border: 1px solid rgba(192, 105, 135, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  outline: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: 0 6px 20px rgba(192, 105, 135, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(192, 105, 135, 0.4);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--text-white);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: var(--bg-accent);
  border-color: var(--primary);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(241, 239, 235, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  height: 76px;
  display: flex;
  align-items: center;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary-dark);
  font-weight: 600;
}

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

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

/* Page Header / Hero Base */
.page-hero {
  padding: 130px 0 60px;
  background: linear-gradient(180deg, rgba(192, 105, 135, 0.08) 0%, var(--bg-main) 100%);
  text-align: center;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-subtitle {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Cards Base */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

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

/* Clickable Accordion / Tabs */
.accordion-item {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.accordion-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text-main);
  background: var(--bg-surface);
  user-select: none;
}

.accordion-header:hover {
  background: var(--bg-accent);
  color: var(--primary-dark);
}

.accordion-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(192, 105, 135, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
  background: var(--primary);
  color: white;
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  background: var(--bg-surface);
  border-top: 1px solid transparent;
}

.accordion-item.active .accordion-body {
  max-height: 800px;
  padding: 16px 24px 24px;
  border-top-color: var(--border-light);
}

/* Standard Footer (Unified across all pages) */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 70px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  margin: 16px 0 24px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-title {
  color: white;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-light);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  flex-wrap: wrap;
  gap: 16px;
}

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

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

/* Hamburger Toggle Button */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
  margin-left: 12px;
  line-height: 1;
  transition: var(--transition);
}

/* Responsive */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .nav-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    border-bottom: 1px solid var(--border-light);
    z-index: 100;
  }
  .nav-links.active {
    display: flex;
  }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
}