/* ============================================================
   Uncodemy — Laravel Course Hub
   Shared stylesheet — identical across all topic pages
   ============================================================ */

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

:root {
  --primary: #FF5421;
  --primary-dark: #E2431A;
  --primary-tint: #FFEDE6;
  --ink: #1A1A2E;
  --ink-soft: #5B5B6E;
  --bg: #F7F7FB;
  --card: #FFFFFF;
  --border: #ECECF3;
  --success: #1BA97F;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 4px 24px rgba(26, 26, 46, 0.06);
  --shadow-lift: 0 12px 32px rgba(255, 84, 33, 0.16);
  --font-head: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { margin: 0; padding: 0; }

button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--primary-dark);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  max-width: 1440px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img {
  height: 36px;
  width: auto;
  display: block;
}

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

.back-to-course {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-tint);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.2s ease, transform 0.15s ease;
}

.back-to-course:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar {
  max-width: 1440px;
  margin: 0 auto;
  padding: 18px 32px 0;
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 500;
}

.breadcrumb-bar strong {
  color: var(--primary-dark);
}

/* ---------- Layout ---------- */
.layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 32px 80px;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
}

/* ---------- Left sidebar ---------- */
.sidebar-left {
  position: sticky;
  top: 88px;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 22px 18px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}

.sidebar-left h2 {
  font-family: var(--font-head);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 4px 6px 14px;
}

.progress-track {
  height: 6px;
  border-radius: 999px;
  background: var(--primary-tint);
  margin: 0 6px 18px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  border-radius: 999px;
}

.topic-nav {
  list-style: none;
}

.topic-nav li {
  margin-bottom: 4px;
}

.topic-nav a {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: background 0.15s ease, color 0.15s ease;
  line-height: 1.4;
}

.topic-nav a:hover {
  background: var(--primary-tint);
  color: var(--primary-dark);
}

.topic-nav .num {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg);
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.topic-nav a.active {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-lift);
}

.topic-nav a.active .num {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.topic-nav .nav-section-title {
  list-style: none;
  margin: 18px 0 6px;
  padding: 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary-dark);
  opacity: 0.75;
}

.topic-nav .nav-section-title:first-child {
  margin-top: 4px;
}

/* ---------- Main article ---------- */
.article-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 44px 48px;
}

.article-card h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 34px;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  color: var(--ink);
}

.article-card h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 21px;
  margin: 36px 0 14px;
  color: var(--ink);
}

.article-card p {
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0 0 16px;
}

.article-card ul {
  margin: 0 0 20px;
  padding-left: 0;
  list-style: none;
}

.article-card ul li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 15.5px;
  color: var(--ink-soft);
}

.article-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--primary);
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

thead th {
  background: var(--primary-tint);
  color: var(--primary-dark);
  font-family: var(--font-head);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
}

tbody td {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--ink-soft);
}

tbody tr:nth-child(even) { background: #FBFBFD; }

code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  background: var(--primary-tint);
  color: var(--primary-dark);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.9em;
}

/* ---------- CTA box ---------- */
.cta-box {
  margin: 40px 0 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-md);
  padding: 30px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  color: #fff;
}

.cta-box h3 {
  font-family: var(--font-head);
  font-size: 20px;
  margin: 0 0 6px;
}

.cta-box p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14.5px;
}

.cta-btn {
  flex: none;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 14.5px;
  padding: 13px 26px;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

/* ---------- Pagination ---------- */
.pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.pagination .spacer { grid-column: span 1; }

.page-link {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.page-link:hover {
  border-color: var(--primary);
  background: var(--primary-tint);
}

.page-link.next { text-align: right; align-items: flex-end; }

.page-link .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-weight: 600;
}

.page-link .title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
}

/* ---------- Right sidebar ---------- */
.sidebar-right {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.batch-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 24px 22px;
  border-top: 4px solid var(--primary);
}

.batch-badge {
  display: inline-block;
  background: var(--primary-tint);
  color: var(--primary-dark);
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.batch-card h3 {
  font-family: var(--font-head);
  font-size: 18px;
  margin: 0 0 14px;
  color: var(--ink);
}

.batch-meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  margin-bottom: 16px;
}

.batch-meta div strong {
  display: block;
  color: var(--ink);
  font-size: 13.5px;
  margin-top: 2px;
}

.countdown {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

.countdown .unit {
  background: var(--bg);
  border-radius: var(--radius-sm);
  text-align: center;
  padding: 10px 4px;
}

.countdown .unit .val {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  color: var(--primary-dark);
  display: block;
}

.countdown .unit .lbl {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.perks {
  list-style: none;
  margin: 0 0 18px;
}

.perks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.perks li::before {
  content: "✓";
  flex: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--success);
  color: #fff;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.seats-badge {
  font-size: 12.5px;
  color: var(--primary-dark);
  background: var(--primary-tint);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  text-align: center;
  font-weight: 600;
  margin-bottom: 16px;
}

.batch-btn {
  display: block;
  text-align: center;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 14.5px;
  padding: 14px;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, transform 0.15s ease;
}

.batch-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.help-card {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 22px;
  color: #fff;
}

.help-card h4 {
  font-family: var(--font-head);
  font-size: 15px;
  margin: 0 0 4px;
}

.help-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0 0 16px;
}

.help-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.help-link {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.08);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  transition: background 0.15s ease;
}

.help-link:hover { background: rgba(255, 255, 255, 0.16); }

.help-link .icon {
  width: 20px;
  height: 20px;
  flex: none;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 26px 32px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-soft);
}

footer a {
  color: var(--primary-dark);
  font-weight: 600;
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 220px minmax(0, 1fr) 260px;
  }
  .article-card { padding: 34px 30px; }
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar-left, .sidebar-right {
    position: static;
    max-height: none;
  }
  .article-card { padding: 28px 22px; }
  .article-card h1 { font-size: 27px; }
  .topbar-inner { padding: 14px 18px; }
  .breadcrumb-bar { padding: 14px 18px 0; }
  .layout { padding: 16px 18px 60px; }
  .pagination { grid-template-columns: 1fr; }
  .page-link.next { text-align: left; align-items: flex-start; }
}