/* ============================================
   Student Reviews — Design System
   Palette: Off-white base, Deep Teal accent, Coral CTA
   Typography: Inter (Google Fonts)
   ============================================ */

/* --- Font fallback to prevent CLS --- */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: local('Inter');
  size-adjust: 100%;
  ascent-override: 90%;
  descent-override: 22%;
  line-gap-override: 0%;
}

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

:root {
  --color-bg: #FAFAF7;
  --color-bg-alt: #F0EFEB;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #555555;
  --color-text-light: #717171;
  --color-primary: #0D7377;
  --color-primary-dark: #095355;
  --color-primary-light: #E6F4F4;
  --color-accent: #E8604C;
  --color-accent-hover: #D14E3B;
  --color-star: #F5A623;
  --color-border: #E5E4E0;
  --color-border-light: #F0EFEB;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1120px;
  --content-width: 720px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--content-width);
}

.section {
  padding: 80px 0;
}

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

.section__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  line-height: 1.6;
}

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

.text-center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}

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

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__logo span {
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--color-text);
}

.nav__cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background: var(--color-primary-dark);
  color: #fff !important;
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-text);
}

/* --- Hero --- */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__desc {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 96, 76, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

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

/* --- How It Works (Steps) --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.step {
  text-align: center;
  padding: 32px 24px;
}

.step__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
  font-weight: 700;
}

.step__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step__desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* --- Review Cards --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.review-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.review-card__stars {
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
}

.review-card__stars svg {
  width: 18px;
  height: 18px;
  fill: var(--color-star);
}

.review-card__text {
  font-size: 0.975rem;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: 20px;
  font-style: italic;
}

.review-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-card__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.review-card__name {
  font-weight: 600;
  font-size: 0.925rem;
}

.review-card__uni {
  font-size: 0.825rem;
  color: var(--color-text-muted);
}

/* --- Stats --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.stat {
  text-align: center;
}

.stat__number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat__label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* --- FAQ --- */
.faq-list {
  max-width: 680px;
  margin: 48px auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  padding: 20px 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
}

.faq-question__icon {
  font-size: 1.5rem;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question__icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer__inner {
  padding: 0 0 20px;
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.cta-banner__title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner__desc {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn--primary {
  background: #fff;
  color: var(--color-primary);
}

.cta-banner .btn--primary:hover {
  background: #f0f0f0;
  color: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* --- Footer --- */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__links a:hover {
  color: var(--color-text);
}

/* --- Blog Cards --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

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

.blog-card__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-bg-alt);
}

.blog-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.blog-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--color-text);
}

.blog-card__excerpt {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
  flex: 1;
}

.blog-card__meta {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* --- Blog Article --- */
.article-header {
  padding: 80px 0 40px;
  text-align: center;
}

.article-header__tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.article-header__title {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.article-header__meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.article-body {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 40px 0 16px;
  color: var(--color-text);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--color-text);
}

.article-body p {
  margin-bottom: 20px;
  line-height: 1.75;
  color: var(--color-text);
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 24px;
  line-height: 1.75;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 16px 24px;
  margin: 24px 0;
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- Article: Table of Contents --- */
.article-toc {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.article-toc strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.article-toc ol {
  margin: 0;
  padding-left: 20px;
  list-style: decimal;
}

.article-toc li {
  margin-bottom: 6px;
  font-size: 0.925rem;
}

.article-toc a {
  color: var(--color-primary);
  text-decoration: none;
}

.article-toc a:hover {
  text-decoration: underline;
}

/* --- Article: What You'll Learn --- */
.article-learn {
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.article-learn strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary-dark);
}

.article-learn ul {
  margin: 0;
  padding-left: 20px;
  list-style: disc;
}

.article-learn li {
  margin-bottom: 4px;
  font-size: 0.925rem;
  line-height: 1.55;
  color: var(--color-text);
}

/* --- Article: Tables --- */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.925rem;
}

.article-body thead {
  background: var(--color-bg-alt);
}

.article-body th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
}

.article-body td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  line-height: 1.5;
}

.article-body tbody tr:hover {
  background: var(--color-bg-alt);
}

/* --- Article: Related Posts --- */
.related-posts {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.related-posts h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.related-posts ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.related-posts li {
  margin-bottom: 10px;
}

.related-posts a {
  color: var(--color-primary);
  font-size: 0.975rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.related-posts a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.related-posts a::before {
  content: '→ ';
  color: var(--color-text-light);
}

/* --- Article: Inline FAQ --- */
.article-faq {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.article-faq h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.article-faq .faq-list {
  margin-top: 16px;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
}

.breadcrumb ol {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}

.breadcrumb li::after {
  content: '›';
  margin-left: 8px;
  color: var(--color-text-light);
}

.breadcrumb li:last-child::after {
  display: none;
}

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

.breadcrumb span {
  color: var(--color-text);
  font-weight: 500;
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .cta-banner {
    padding: 40px 24px;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__toggle {
    display: block;
  }

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

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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