/* ==========================================================================
   Bixel Studio — Procreate Handbook Stylesheet
   Directly inspired by help.procreate.com/procreate/handbook
   ========================================================================== */

.handbook-body {
  background-color: #000000;
  color: var(--text-white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Top Header Bar & Ribbon
   ========================================================================== */
.hb-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 68px;
  background: rgba(10, 10, 14, 0.85);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 1000;
}

.hb-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.hb-logo-img {
  width: 30px;
  height: 30px;
  image-rendering: pixelated;
  filter: drop-shadow(0 0 12px rgba(34, 197, 94, 0.45));
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.hb-brand:hover .hb-logo-img {
  transform: scale(1.15) rotate(-6deg);
}

.hb-brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hb-badge {
  font-size: 0.72rem;
  background: rgba(34, 197, 94, 0.15);
  color: #34d399;
  border: 1px solid rgba(34, 197, 94, 0.35);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hb-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.hb-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.hb-search-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-pill);
  padding: 8px 16px 8px 38px;
  color: var(--text-white);
  font-size: 0.88rem;
  width: 260px;
  outline: none;
  transition: all 0.25s ease;
}

.hb-search-input:focus {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-magenta);
  width: 320px;
  box-shadow: 0 0 20px rgba(247, 35, 91, 0.25);
}

.hb-search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-tertiary);
  pointer-events: none;
}

/* ==========================================================================
   Handbook Layout Structure
   ========================================================================== */
.hb-layout {
  display: flex;
  margin-top: 68px;
  min-height: calc(100vh - 68px);
}

/* Sticky Left Sidebar */
.hb-sidebar {
  width: 310px;
  flex-shrink: 0;
  position: sticky;
  top: 68px;
  height: calc(100vh - 68px);
  overflow-y: auto;
  border-right: 1px solid var(--border-hairline);
  background: #09090c;
  padding: 32px 18px 80px;
}

.hb-sidebar::-webkit-scrollbar {
  width: 5px;
}

.hb-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.sidebar-group {
  margin-bottom: 24px;
}

.sidebar-group-title {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-tertiary);
  font-weight: 700;
  padding: 8px 12px;
  display: block;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-item-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.15s ease;
}

.sidebar-item-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-white);
}

.sidebar-item-link.active {
  background: rgba(247, 35, 91, 0.12);
  color: #ffffff;
  font-weight: 600;
  border-left: 3px solid var(--accent-magenta);
  padding-left: 11px;
}

.sidebar-item-icon {
  font-size: 1rem;
  opacity: 0.9;
}

/* Main Documentation Column */
.hb-main {
  flex: 1;
  max-width: 880px;
  padding: 56px 64px 140px;
  margin: 0 auto;
}

.hb-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

.hb-breadcrumbs a:hover {
  color: var(--text-white);
}

.hb-chapter {
  margin-bottom: 100px;
  scroll-margin-top: 100px;
}

.hb-chapter-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  display: inline-block;
}

.hb-chapter-title {
  font-size: clamp(2.4rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hb-lead {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 28px;
  font-weight: 400;
}

.hb-section h3 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 36px 0 16px;
}

.hb-section p {
  color: #d1d1dc;
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

/* ==========================================================================
   Callout Alert Boxes (Procreate Clean Left-Bar Style)
   ========================================================================== */
.hb-callout {
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 32px 0;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  font-size: 0.95rem;
  line-height: 1.65;
  background: var(--bg-surface-1);
  border: 1px solid var(--border-hairline);
}

.hb-callout-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}

.hb-callout-note {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(0, 229, 255, 0.05);
}

.hb-callout-tip {
  border-left: 4px solid var(--accent-green);
  background: rgba(0, 255, 136, 0.05);
}

.hb-callout-important {
  border-left: 4px solid var(--accent-magenta);
  background: rgba(247, 35, 91, 0.05);
}

/* Keyboard Shortcut Badge */
.kbd {
  display: inline-block;
  padding: 2px 8px;
  background: #181820;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Code Snippet Box */
.hb-code {
  background: #0f0f14;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-green);
  overflow-x: auto;
  margin: 22px 0;
}

/* Handbook Screenshot Frame */
.hb-screenshot-card {
  margin: 36px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-surface-1);
  border: 1px solid var(--border-hairline);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.hb-screenshot-card img {
  width: 100%;
  height: auto;
  display: block;
}

.hb-screenshot-caption {
  padding: 12px 20px;
  font-size: 0.84rem;
  color: var(--text-tertiary);
  background: #0d0d12;
  border-top: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hb-screenshot-caption code {
  color: var(--accent-magenta);
  font-size: 0.78rem;
}

/* Clean Tables */
.hb-table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  font-size: 0.92rem;
}

.hb-table th {
  text-align: left;
  padding: 14px 18px;
  background: #111116;
  color: var(--text-white);
  border-bottom: 2px solid var(--border-hairline);
  font-weight: 700;
}

.hb-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-hairline);
  color: #c4c4d4;
}

.hb-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   Responsive Handbook
   ========================================================================== */
@media (max-width: 1024px) {
  .hb-sidebar {
    display: none;
  }
  .hb-main {
    padding: 36px 24px 100px;
  }
  .hb-search-input {
    width: 180px;
  }
  .hb-search-input:focus {
    width: 220px;
  }
}