/* ============================================================
   HDB COPIA E COLA – Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --bg-base: #0a0d14;
  --bg-surface: #111520;
  --bg-elevated: #181d2e;
  --bg-card: #1e2438;
  --bg-hover: #252c42;

  --accent-1: #4f8ef7;
  --accent-2: #7c5af7;
  --accent-glow: rgba(79, 142, 247, 0.18);
  --accent-grad: linear-gradient(135deg, #4f8ef7 0%, #7c5af7 100%);

  --text-primary: #e8eaf2;
  --text-secondary: #8b93b0;
  --text-muted: #4e5672;
  --text-inverse: #ffffff;

  --border: rgba(255, 255, 255, 0.07);
  --border-accent: rgba(79, 142, 247, 0.35);

  --code-bg: #0d1117;
  --code-border: rgba(255, 255, 255, 0.08);

  --success: #22d3a0;
  --warning: #f5a623;
  --danger: #f75a5a;

  --sidebar-w: 280px;
  --header-h: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent-1);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-hover);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-1);
}

/* ══════════════════════════════════════════════════════════════
   LAYOUT
══════════════════════════════════════════════════════════════ */

.layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ───────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-grad);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 0 20px var(--accent-glow);
  flex-shrink: 0;
}

.logo-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.logo-sub {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  display: block;
  margin-top: 1px;
}

.sidebar-search {
  margin-top: 16px;
  position: relative;
}

.sidebar-search input {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px 8px 34px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.sidebar-search input::placeholder {
  color: var(--text-muted);
}

.sidebar-search input:focus {
  border-color: var(--accent-1);
}

.sidebar-search .search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
  pointer-events: none;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

/* Module accordion */
.module-group {
  margin-bottom: 4px;
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  cursor: pointer;
  user-select: none;
  border-radius: 0;
  transition: background var(--transition);
}

.module-header:hover {
  background: var(--bg-elevated);
}

.module-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.module-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-grad);
  flex-shrink: 0;
}

.module-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.module-count {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 1px 7px;
  border-radius: 99px;
}

.module-chevron {
  font-size: 10px;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.module-group.open .module-chevron {
  transform: rotate(180deg);
}

.module-items {
  display: none;
  padding: 4px 0;
}

.module-group.open .module-items {
  display: block;
}

/* Nav Item */
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px 9px 32px;
  cursor: pointer;
  border-radius: 0;
  transition: background var(--transition);
  position: relative;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--bg-elevated);
}

.nav-item.active {
  background: var(--accent-glow);
  border-left-color: var(--accent-1);
}

.nav-item.active .nav-item-title {
  color: var(--accent-1);
}

.nav-item-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.nav-item-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.3;
  flex: 1;
}

.nav-item.active .nav-item-icon {
  color: var(--accent-1);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-footer-text {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ── Main Content ──────────────────────────────────────────── */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Top Header ────────────────────────────────────────────── */
#topbar {
  height: var(--header-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

#hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

#hamburger:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

#breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

#breadcrumb .bc-sep {
  color: var(--text-muted);
  opacity: 0.4;
}

#breadcrumb .bc-active {
  color: var(--text-secondary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-1);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  padding: 3px 10px;
  border-radius: 99px;
}

/* ── Content Area ──────────────────────────────────────────── */
#content-area {
  flex: 1;
  padding: 40px 48px;
  max-width: 1000px;
  width: 100%;
}

/* ── Welcome Screen ────────────────────────────────────────── */
#welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-h));
  text-align: center;
  padding: 60px 40px;
}

.welcome-icon {
  font-size: 64px;
  margin-bottom: 24px;
  filter: drop-shadow(0 0 30px var(--accent-glow));
}

.welcome-title {
  font-size: 36px;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.welcome-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.welcome-stats {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 28px;
  text-align: center;
  min-width: 120px;
  transition: transform var(--transition), border-color var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-accent);
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* ── Activity View ─────────────────────────────────────────── */
#activity-view {
  display: none;
}

.activity-header {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.activity-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.tag.accent {
  background: var(--accent-glow);
  border-color: var(--border-accent);
  color: var(--accent-1);
}

.activity-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 6px;
}

.activity-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
}

/* PDF Banner */
.pdf-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(79, 142, 247, 0.1) 0%, rgba(124, 90, 247, 0.1) 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 12px;
}

.pdf-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pdf-icon {
  font-size: 28px;
}

.pdf-text-main {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.pdf-text-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.pdf-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none !important;
}

.btn-primary {
  background: var(--accent-grad);
  color: white;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 142, 247, 0.35);
  color: white;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-accent);
}

/* ══════════════════════════════════════════════════════════════
   MARKDOWN RENDERED CONTENT
══════════════════════════════════════════════════════════════ */

#md-content {
  line-height: 1.75;
}

#md-content h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

#md-content h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 40px 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

#md-content h2::before {
  content: '';
  display: block;
  width: 4px;
  height: 20px;
  background: var(--accent-grad);
  border-radius: 99px;
  flex-shrink: 0;
}

#md-content h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 28px 0 12px;
}

#md-content p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 14px;
}

#md-content ul,
#md-content ol {
  color: var(--text-secondary);
  margin: 12px 0 12px 20px;
  font-size: 14px;
}

#md-content li {
  margin-bottom: 6px;
}

#md-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

/* Inline code */
#md-content code:not(pre code) {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--accent-1);
}

/* Code blocks */
#md-content pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 16px 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--code-border);
}

.code-lang {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.code-lang::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-1);
  opacity: 0.6;
}

.btn-copy {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-copy:hover {
  background: var(--accent-glow);
  border-color: var(--border-accent);
  color: var(--accent-1);
}

.btn-copy.copied {
  background: rgba(34, 211, 160, 0.12);
  border-color: rgba(34, 211, 160, 0.35);
  color: var(--success);
}

#md-content pre code {
  display: block;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #cdd6f4;
  overflow-x: auto;
  background: none !important;
}

/* Highlight.js theme override (Catppuccin-inspired) */
.hljs-keyword {
  color: #cba6f7;
}

.hljs-string {
  color: #a6e3a1;
}

.hljs-comment {
  color: #585b70;
  font-style: italic;
}

.hljs-number {
  color: #fab387;
}

.hljs-built_in {
  color: #89dceb;
}

.hljs-variable {
  color: #f38ba8;
}

.hljs-attr {
  color: #89b4fa;
}

.hljs-title {
  color: #f9e2af;
}

.hljs-operator {
  color: #94e2d5;
}

.hljs-params {
  color: #cdd6f4;
}

.hljs-function {
  color: #89b4fa;
}

.hljs-literal {
  color: #fab387;
}

/* Blockquotes (Tarefas) */
#md-content blockquote {
  background: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.25);
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin: 20px 0;
  color: #f5e6c0;
  font-size: 14px;
}

#md-content blockquote p {
  color: #f5e6c0;
  margin-bottom: 6px;
}

#md-content blockquote p:last-child {
  margin-bottom: 0;
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE MOBILE
══════════════════════════════════════════════════════════════ */

#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 99;
  backdrop-filter: blur(4px);
}

@media (max-width: 768px) {
  #sidebar {
    transform: translateX(-100%);
  }

  #sidebar.open {
    transform: translateX(0);
    box-shadow: 8px 0 40px rgba(0, 0, 0, 0.5);
  }

  #sidebar-overlay.visible {
    display: block;
  }

  #main {
    margin-left: 0;
  }

  #hamburger {
    display: flex;
  }

  #content-area {
    padding: 24px 20px;
  }

  #topbar {
    padding: 0 16px;
  }

  .welcome-title {
    font-size: 26px;
  }

  .activity-title {
    font-size: 20px;
  }

  .pdf-banner {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .welcome-stats {
    gap: 12px;
  }

  .stat-card {
    padding: 14px 18px;
    min-width: 90px;
  }

  #md-content pre code {
    font-size: 12px;
  }
}

/* ── Loading Spinner ───────────────────────────────────────── */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 60px auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── Toast Notification ────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 9999;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
}

#toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease forwards;
}