/* =========================================
   GradeCalcHub - Main Stylesheet
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap');

/* ---- CSS Variables (light mode) ---- */
:root {
  --background: hsl(210, 20%, 98%);
  --foreground: hsl(220, 25%, 10%);
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(220, 25%, 10%);
  --primary: hsl(168, 80%, 36%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(220, 20%, 95%);
  --secondary-foreground: hsl(220, 25%, 10%);
  --muted: hsl(220, 15%, 93%);
  --muted-foreground: hsl(220, 10%, 46%);
  --accent: hsl(38, 95%, 60%);
  --border: hsl(220, 15%, 90%);
  --input: hsl(220, 15%, 90%);
  --destructive: hsl(0, 84%, 60%);
  --radius: 0.75rem;
  --hero-gradient: linear-gradient(135deg, hsl(168, 80%, 36%), hsl(195, 85%, 40%));
  --card-shadow: 0 4px 24px -4px hsl(220, 25%, 10%, 0.08);
  --card-shadow-hover: 0 8px 32px -4px hsl(220, 25%, 10%, 0.14);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

/* ---- Dark mode ---- */
[data-theme="dark"] {
  --background: hsl(220, 25%, 8%);
  --foreground: hsl(210, 20%, 95%);
  --card: hsl(220, 22%, 12%);
  --card-foreground: hsl(210, 20%, 95%);
  --primary: hsl(168, 75%, 42%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(220, 20%, 16%);
  --secondary-foreground: hsl(210, 20%, 95%);
  --muted: hsl(220, 18%, 18%);
  --muted-foreground: hsl(220, 10%, 55%);
  --border: hsl(220, 18%, 18%);
  --input: hsl(220, 18%, 18%);
  --destructive: hsl(0, 62.8%, 50%);
  --hero-gradient: linear-gradient(135deg, hsl(168, 75%, 30%), hsl(195, 80%, 30%));
  --card-shadow: 0 4px 24px -4px hsl(0, 0%, 0%, 0.3);
  --card-shadow-hover: 0 8px 32px -4px hsl(0, 0%, 0%, 0.4);
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); line-height: 1.3; }

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

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

main { flex: 1; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ---- Hero Section ---- */
.hero-section {
  background-image: var(--hero-gradient);
  padding: 4rem 1rem;
  text-align: center;
}

@media (min-width: 640px) { .hero-section { padding: 6rem 1rem; } }

.hero-section h1 { color: var(--primary-foreground); font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .hero-section h1 { font-size: 3rem; } }
.hero-section p { color: rgba(255,255,255,0.85); margin-top: 1rem; max-width: 36rem; margin-left: auto; margin-right: auto; }

/* ---- Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background-color: color-mix(in srgb, var(--background) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--foreground);
}

.navbar-brand .brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--primary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.navbar-brand .brand-icon svg { width: 1.25rem; height: 1.25rem; color: white; }
.navbar-brand .accent { color: var(--primary); }

.navbar-nav {
  display: none;
  list-style: none;
  align-items: center;
  gap: 0.25rem;
}

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

.navbar-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: background-color 0.2s, color 0.2s;
}

.navbar-nav a:hover { background-color: var(--secondary); color: var(--foreground); }
.navbar-nav a.active { background-color: color-mix(in srgb, var(--primary) 10%, transparent); color: var(--primary); }

.navbar-actions { display: flex; align-items: center; gap: 0.5rem; }

.btn-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.375rem;
  border: none;
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.btn-icon:hover { background-color: var(--secondary); }
.btn-icon svg { width: 1.25rem; height: 1.25rem; }

.mobile-menu-btn { display: flex; }
@media (min-width: 768px) { .mobile-menu-btn { display: none; } }

/* Mobile Menu */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease;
}

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

.mobile-menu ul { list-style: none; display: flex; flex-direction: column; gap: 0.25rem; padding: 0.75rem 1rem; }
.mobile-menu ul a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: background-color 0.2s, color 0.2s;
}
.mobile-menu ul a:hover { background-color: var(--secondary); color: var(--foreground); }
.mobile-menu ul a.active { background-color: color-mix(in srgb, var(--primary) 10%, transparent); color: var(--primary); }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  background-color: var(--card);
}

.footer-inner { padding: 3rem 1rem; }

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(3, 1fr); } }

.footer-brand { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }
.footer-brand .brand-icon { width: 2rem; height: 2rem; background: var(--primary); border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; }
.footer-brand .brand-icon svg { width: 1rem; height: 1rem; color: white; }
.footer-brand .accent { color: var(--primary); }
.footer-desc { margin-top: 0.75rem; font-size: 0.875rem; color: var(--muted-foreground); }

.footer-heading { font-family: var(--font-display); font-size: 0.875rem; font-weight: 600; color: var(--foreground); }
.footer-links { list-style: none; margin-top: 0.75rem; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a { font-size: 0.875rem; color: var(--muted-foreground); transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }

.footer-copy { margin-top: 2.5rem; border-top: 1px solid var(--border); padding-top: 1.5rem; text-align: center; font-size: 0.75rem; color: var(--muted-foreground); }

/* ---- Cards ---- */
.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.3s, transform 0.3s;
}

.card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }

.card-body { padding: 1.5rem; }
@media (min-width: 640px) { .card-body { padding: 2rem; } }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, opacity 0.2s;
  font-family: var(--font-body);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background-color: var(--primary); color: var(--primary-foreground); }
.btn-primary:hover { opacity: 0.9; }

.btn-outline { background: transparent; border-color: var(--border); color: var(--foreground); }
.btn-outline:hover { background-color: var(--secondary); }

.btn-ghost { background: transparent; color: var(--foreground); }
.btn-ghost:hover { background-color: var(--secondary); }

.btn-sm { padding: 0.375rem 0.625rem; font-size: 0.8rem; }
.btn-full { width: 100%; }
.btn-icon-only { padding: 0.5rem; width: 2.25rem; height: 2.25rem; }

/* ---- Form Controls ---- */
.form-group { display: flex; flex-direction: column; gap: 0.375rem; }

label { font-size: 0.875rem; font-weight: 500; color: var(--foreground); }

input[type="text"],
input[type="email"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--foreground);
  font-family: var(--font-body);
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}

select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2.5rem; }

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

/* ---- Calculator Hub ---- */
.calc-hub { max-width: 36rem; margin: 0 auto; }

.calc-title { text-align: center; font-size: 1.25rem; font-weight: 700; margin-bottom: 0.25rem; }
.calc-subtitle { text-align: center; font-size: 0.875rem; color: var(--muted-foreground); margin-bottom: 1.5rem; }

.country-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: color-mix(in srgb, var(--secondary) 50%, transparent);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  margin-bottom: 1.5rem;
}

.country-selector svg { color: var(--primary); width: 1rem; height: 1rem; flex-shrink: 0; }
.country-selector select { border: 0; background: transparent; box-shadow: none; padding: 0.25rem 2rem 0.25rem 0.25rem; }
.country-selector select:focus { box-shadow: none; }

.tab-bar {
  display: flex;
  gap: 0.25rem;
  background-color: var(--secondary);
  border-radius: 0.75rem;
  padding: 0.25rem;
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.625rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--muted-foreground);
  transition: background-color 0.2s, color 0.2s;
  font-family: var(--font-body);
}

@media (min-width: 640px) { .tab-btn { font-size: 0.875rem; } }

.tab-btn:hover { color: var(--foreground); }
.tab-btn.active { background-color: var(--primary); color: var(--primary-foreground); }
.tab-btn svg { width: 1rem; height: 1rem; }

.tab-label-short { display: inline; }
.tab-label-full { display: none; }
@media (min-width: 640px) { .tab-label-short { display: none; } .tab-label-full { display: inline; } }

/* Calculator form */
.calc-desc { font-size: 0.875rem; color: var(--muted-foreground); margin-bottom: 1rem; }
.calc-desc strong { color: var(--foreground); }

.calc-form { display: flex; flex-direction: column; gap: 1rem; }

.subject-row, .semester-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
}

.subject-row .form-group:first-child,
.semester-row .form-group:first-child { flex: 1; }

.subject-row .form-group.credits,
.semester-row .form-group.credits { width: 6rem; flex-shrink: 0; }

.remove-btn {
  width: 2.25rem;
  height: 2.25rem;
  min-width: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--destructive);
  border-radius: 0.375rem;
  transition: background-color 0.2s;
  flex-shrink: 0;
  align-self: flex-end;
  margin-bottom: 1px;
}

.remove-btn:hover { background-color: color-mix(in srgb, var(--destructive) 10%, transparent); }
.remove-btn svg { width: 1rem; height: 1rem; }

.calc-btns { display: flex; gap: 0.75rem; padding-top: 0.5rem; }
.calc-btns .btn-primary { flex: 1; }

.result-box {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent);
  background-color: color-mix(in srgb, var(--primary) 5%, transparent);
  display: flex;
  align-items: center;
  justify-content: space-between;
  animation: fadeSlideIn 0.25s ease;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-label { font-size: 0.875rem; color: var(--muted-foreground); }
.result-value { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--foreground); }
.result-grade { font-size: 0.875rem; font-weight: 500; color: var(--primary); margin-top: 0.125rem; }

/* ---- Features Grid ---- */
.features-section { background-color: color-mix(in srgb, var(--secondary) 50%, transparent); padding: 3rem 1rem; }
@media (min-width: 640px) { .features-section { padding: 4rem 1rem; } }
.features-section h2 { text-align: center; font-size: 1.5rem; font-weight: 700; margin-bottom: 2rem; }
.features-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; max-width: 56rem; margin: 0 auto; }
@media (min-width: 640px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }
.feature-card { padding: 1.25rem; }
.feature-card svg { width: 2rem; height: 2rem; color: var(--primary); }
.feature-card h3 { font-size: 1rem; font-weight: 600; margin-top: 0.75rem; }
.feature-card p { font-size: 0.875rem; color: var(--muted-foreground); margin-top: 0.25rem; }

/* ---- How to use ---- */
.steps-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1.5rem; }
.step-item { display: flex; gap: 0.75rem; align-items: flex-start; }
.step-num {
  width: 1.75rem;
  height: 1.75rem;
  min-width: 1.75rem;
  border-radius: 50%;
  background-color: var(--primary);
  color: var(--primary-foreground);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
}
.step-text { color: var(--muted-foreground); padding-top: 0.25rem; }

/* ---- Accordion (FAQ) ---- */
.faq-section { background-color: color-mix(in srgb, var(--secondary) 50%, transparent); padding: 3rem 1rem; }
.faq-section h2 { text-align: center; font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.faq-list { display: flex; flex-direction: column; gap: 0.5rem; max-width: 48rem; margin: 0 auto; }

.faq-item {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--foreground);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-align: left;
  gap: 0.75rem;
}

.faq-trigger .chevron { width: 1rem; height: 1rem; flex-shrink: 0; transition: transform 0.2s; color: var(--muted-foreground); }
.faq-trigger[aria-expanded="true"] .chevron { transform: rotate(180deg); }

.faq-body { display: none; padding: 0 1rem 1rem; font-size: 0.875rem; color: var(--muted-foreground); }
.faq-body.open { display: block; }

/* ---- About cards ---- */
.about-cards { display: flex; flex-direction: column; gap: 1.5rem; max-width: 48rem; margin: 3rem auto 0; padding: 0 1rem 3rem; }
.about-card { display: flex; gap: 1rem; align-items: flex-start; }
.about-icon { width: 2.5rem; height: 2.5rem; min-width: 2.5rem; background-color: color-mix(in srgb, var(--primary) 10%, transparent); border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; }
.about-icon svg { width: 1.25rem; height: 1.25rem; color: var(--primary); }
.about-card h2 { font-size: 1.1rem; font-weight: 700; }
.about-card p { margin-top: 0.5rem; color: var(--muted-foreground); }

/* ---- Blog ---- */
.blog-grid { display: grid; gap: 1.5rem; padding: 3rem 1rem; }
@media (min-width: 640px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }

.blog-card { display: flex; flex-direction: column; }
.blog-card-body { padding: 1.25rem; display: flex; flex-direction: column; flex: 1; }
.blog-badge { display: inline-block; font-size: 0.7rem; font-weight: 600; padding: 0.2rem 0.5rem; border-radius: 9999px; background-color: color-mix(in srgb, var(--primary) 10%, transparent); color: var(--primary); margin-bottom: 0.75rem; }
.blog-card h2 { font-size: 1rem; font-weight: 700; line-height: 1.4; }
.blog-card p { font-size: 0.875rem; color: var(--muted-foreground); margin-top: 0.5rem; flex: 1; }
.blog-meta { display: flex; align-items: center; gap: 0.375rem; margin-top: 0.75rem; font-size: 0.75rem; color: var(--muted-foreground); }
.blog-meta svg { width: 0.875rem; height: 0.875rem; }
.blog-read-more { display: inline-flex; align-items: center; gap: 0.25rem; margin-top: 1rem; font-size: 0.875rem; font-weight: 500; color: var(--primary); }
.blog-read-more svg { width: 0.875rem; height: 0.875rem; }

/* ---- Blog Post ---- */
.blog-post-container { max-width: 48rem; margin: 0 auto; padding: 3rem 1rem; }
.blog-back { display: inline-flex; align-items: center; gap: 0.375rem; font-size: 0.875rem; color: var(--muted-foreground); margin-bottom: 1.5rem; }
.blog-back:hover { color: var(--primary); }
.blog-back svg { width: 1rem; height: 1rem; }
.blog-post-meta { font-size: 0.875rem; color: var(--muted-foreground); margin-bottom: 1.5rem; }
.blog-post-content { color: var(--muted-foreground); line-height: 1.8; }
.blog-post-content h2 { font-size: 1.5rem; font-weight: 700; color: var(--foreground); margin-top: 2rem; margin-bottom: 0.75rem; }
.blog-post-content h3 { font-size: 1.15rem; font-weight: 600; color: var(--foreground); margin-top: 1.5rem; margin-bottom: 0.5rem; }
.blog-post-content p { margin-bottom: 1rem; }
.blog-post-content ul, .blog-post-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.blog-post-content li { margin-bottom: 0.25rem; }
.blog-post-content a { color: var(--primary); text-decoration: underline; }
.blog-post-content table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.875rem; overflow-x: auto; display: block; }
.blog-post-content th, .blog-post-content td { border: 1px solid var(--border); padding: 0.5rem 0.75rem; text-align: left; }
.blog-post-content th { background-color: var(--secondary); font-weight: 600; color: var(--foreground); }

/* ---- Contact ---- */
.contact-section { padding: 3rem 1rem; }
.contact-card { max-width: 32rem; margin: 0 auto; }
.contact-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; }
.contact-icon { width: 2.5rem; height: 2.5rem; background: color-mix(in srgb, var(--primary) 10%, transparent); border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; }
.contact-icon svg { width: 1.25rem; height: 1.25rem; color: var(--primary); }
.contact-header h2 { font-size: 1.1rem; font-weight: 700; }
.contact-header p { font-size: 0.875rem; color: var(--muted-foreground); }

/* ---- Policy pages ---- */
.policy-content { max-width: 48rem; margin: 0 auto; padding: 3rem 1rem; }
.policy-section { margin-bottom: 2rem; }
.policy-section h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.5rem; }
.policy-section p { color: var(--muted-foreground); }
.policy-section ul { color: var(--muted-foreground); padding-left: 1.5rem; margin-top: 0.5rem; }
.policy-section li { margin-bottom: 0.25rem; }
.policy-section a { color: var(--primary); text-decoration: underline; }
.policy-updated { font-size: 0.75rem; color: var(--muted-foreground); }

/* ---- Content sections (Index) ---- */
.content-sections { max-width: 48rem; margin: 0 auto; padding: 3rem 1rem; display: flex; flex-direction: column; gap: 3rem; }
.content-section h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
.content-section h3 { font-size: 1.1rem; font-weight: 600; margin-top: 1rem; margin-bottom: 0.5rem; }
.content-section p { color: var(--muted-foreground); line-height: 1.8; }
.content-section ul { color: var(--muted-foreground); padding-left: 1.5rem; margin-top: 0.5rem; }
.content-section li { margin-bottom: 0.25rem; }

/* ---- Toast ---- */
.toast-container { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 9999; display: flex; flex-direction: column; gap: 0.5rem; pointer-events: none; }
.toast {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  box-shadow: var(--card-shadow);
  animation: toastIn 0.3s ease;
  pointer-events: auto;
  max-width: 20rem;
  color: var(--foreground);
}
.toast.toast-success { border-left: 3px solid var(--primary); }
.toast.toast-error { border-left: 3px solid var(--destructive); }
@keyframes toastIn { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }

/* ---- 404 ---- */
.not-found { display: flex; align-items: center; justify-content: center; min-height: 60vh; text-align: center; padding: 2rem; }
.not-found h1 { font-size: 4rem; font-weight: 700; }
.not-found p { color: var(--muted-foreground); margin: 1rem 0; font-size: 1.25rem; }

/* ---- Utility ---- */
.text-primary { color: var(--primary); }
.text-muted { color: var(--muted-foreground); }
.text-center { text-align: center; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.mt-2 { margin-top: 0.5rem; }
.section-header { margin-bottom: 2rem; }
.section-header h2 { font-size: 1.5rem; font-weight: 700; }