/* ============================================================
   Origami AI — Salesbook
   Brand: navy #1E293B, indigo #4F46E5, sage #C2D3CD, rose #FDA4AF
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Brand */
  --navy:       #1E293B;
  --indigo:     #4F46E5;
  --indigo-dim: rgba(79, 70, 229, 0.08);
  --sage:       #C2D3CD;
  --rose:       #FDA4AF;
  --white:      #FFFFFF;
  --gray-50:    #F8FAFC;
  --gray-100:   #F1F5F9;
  --gray-200:   #E2E8F0;
  --gray-400:   #94A3B8;
  --gray-500:   #64748B;
  --gray-600:   #475569;
  --gray-700:   #334155;

  /* Layout */
  --topbar-h:    56px;
  --sidebar-w:   260px;

  /* Type */
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
}

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--navy);
  line-height: 1.65;
  overflow: hidden;
  height: 100vh;
}

/* ===== TOP BAR ===== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--navy);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 32px;
  flex-shrink: 0;
}

.topbar-logo {
  height: 30px;
  width: auto;
}

.topbar-title {
  color: var(--sage);
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-left: 1px solid rgba(255,255,255,0.15);
  padding-left: 12px;
}

/* Top tabs */
.top-tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}

.top-tabs::-webkit-scrollbar { display: none; }

.top-tab {
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  background: transparent;
  border: none;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
  position: relative;
}

.top-tab:hover {
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.06);
}

.top-tab.active {
  color: var(--white);
  background: var(--gray-50);
  color: var(--navy);
}

.top-tab.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--indigo);
  border-radius: 3px 3px 0 0;
}

/* ===== MAIN LAYOUT ===== */
.main {
  display: flex;
  margin-top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
}

/* ===== LEFT SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  padding: 20px 16px 12px;
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-section-title {
  display: block;
  font-weight: 800;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-500);
  margin-bottom: 10px;
}

.sidebar-download-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--indigo);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--indigo-dim);
  transition: background 0.15s;
}

.sidebar-download-all:hover {
  background: rgba(79, 70, 229, 0.14);
  text-decoration: none;
}

.sidebar-pages {
  list-style: none;
  padding: 8px 8px;
  flex: 1;
}

.sidebar-page {
  display: block;
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  text-decoration: none;
  line-height: 1.4;
}

.sidebar-page:hover {
  background: var(--gray-100);
  color: var(--navy);
  text-decoration: none;
}

.sidebar-page.active {
  background: var(--indigo-dim);
  color: var(--indigo);
  font-weight: 700;
}



/* ===== CONTENT ===== */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px 60px;

}

/* Overview */
.overview-hero {
  margin-bottom: 40px;
}

.overview-hero h1 {
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.overview-desc {
  color: var(--gray-600);
  font-size: 15px;
  max-width: 600px;
  margin-bottom: 20px;
}

.btn-download-section {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--indigo);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.15s;
}

.btn-download-section:hover {
  background: #3730A3;
  text-decoration: none;
}

.overview-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.overview-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.overview-card:hover {
  border-color: var(--indigo);
  box-shadow: 0 2px 12px rgba(79, 70, 229, 0.08);
}

.overview-card-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--indigo);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.overview-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.overview-card-desc {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.5;
}

/* Page view */
.page-header {
  margin-bottom: 24px;
}

.page-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-500);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.12s, background 0.12s;
}

.btn-back:hover {
  color: var(--navy);
  background: var(--gray-100);
}

.btn-download-pdf {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--indigo);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  transition: border-color 0.12s, background 0.12s;
}

.btn-download-pdf:hover {
  border-color: var(--indigo);
  background: var(--indigo-dim);
  text-decoration: none;
}

.page-header h1 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--sage);
}

/* Video placeholder */
.page-video {
  margin-bottom: 28px;
}

.video-placeholder {
  background: var(--navy);
  border-radius: 10px;
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--sage);
  font-size: 14px;
  font-weight: 600;
}

/* Page body (rendered markdown) */
.page-body h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 10px;
  color: var(--navy);
}

.page-body h3 {
  font-size: 16px;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--navy);
}

.page-body p {
  margin-bottom: 14px;
  color: var(--gray-700);
}

.page-body strong {
  color: var(--navy);
  font-weight: 700;
}

.page-body ul, .page-body ol {
  padding-left: 24px;
  margin-bottom: 14px;
  color: var(--gray-700);
}

.page-body li {
  margin-bottom: 6px;
}

.page-body blockquote {
  border-left: 3px solid var(--indigo);
  padding-left: 16px;
  margin: 20px 0;
  color: var(--gray-600);
  font-style: italic;
}

.page-body hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: 32px 0;
}

/* ===== SCROLLBARS ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .sidebar { width: 220px; min-width: 220px; }
  .content { padding: 24px 24px 60px; }
}

@media (max-width: 700px) {
  .sidebar { display: none; } /* TODO: mobile drawer */
  .content { padding: 20px 16px 60px; }
  .overview-cards { grid-template-columns: 1fr; }
}