/* ═══════════════════════════════════════════════════
   IT Lernplattform – style.css
   Theme: Catppuccin (Latte light / Mocha dark)
   https://catppuccin.com
═══════════════════════════════════════════════════ */

/* ── Catppuccin Latte (Light) – Default ──────────── */
:root {
  --bg:          #eff1f5;
  --sidebar-bg:  #e6e9ef;
  --crust:       #dce0e8;
  --surface:     #ccd0da;
  --surface-1:   #bcc0cc;
  --overlay:     #9ca0b0;
  --text:        #4c4f69;
  --subtext:     #6c6f85;
  --accent:      #1e66f0;
  --accent-soft: #dce8fd;
  --accent-dim:  #185fa5;
  --green:       #40a02b;
  --green-soft:  #dff0d8;
  --red:         #d20f39;
  --red-soft:    #fde4ea;
  --yellow:      #df8e1d;
  --yellow-soft: #fdf0d8;
  --mauve:       #8839ef;
  --mauve-soft:  #ede8fc;
  --teal:        #179299;
}

/* ── System dark mode preference ─────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:          #1e1e2e;
    --sidebar-bg:  #181825;
    --crust:       #11111b;
    --surface:     #313244;
    --surface-1:   #45475a;
    --overlay:     #6c7086;
    --text:        #cdd6f4;
    --subtext:     #a6adc8;
    --accent:      #89b4fa;
    --accent-soft: #1a2744;
    --accent-dim:  #b4befe;
    --green:       #a6e3a1;
    --green-soft:  #1a2e1e;
    --red:         #f38ba8;
    --red-soft:    #2e1a22;
    --yellow:      #f9e2af;
    --yellow-soft: #2e2418;
    --mauve:       #cba6f7;
    --mauve-soft:  #251a38;
    --teal:        #94e2d5;
  }
}

/* ── Explicit theme overrides (via JS toggle) ─────── */
html.light {
  --bg:          #eff1f5;
  --sidebar-bg:  #e6e9ef;
  --crust:       #dce0e8;
  --surface:     #ccd0da;
  --surface-1:   #bcc0cc;
  --overlay:     #9ca0b0;
  --text:        #4c4f69;
  --subtext:     #6c6f85;
  --accent:      #1e66f0;
  --accent-soft: #dce8fd;
  --accent-dim:  #185fa5;
  --green:       #40a02b;
  --green-soft:  #dff0d8;
  --red:         #d20f39;
  --red-soft:    #fde4ea;
  --yellow:      #df8e1d;
  --yellow-soft: #fdf0d8;
  --mauve:       #8839ef;
  --mauve-soft:  #ede8fc;
  --teal:        #179299;
}

html.dark {
  --bg:          #1e1e2e;
  --sidebar-bg:  #181825;
  --crust:       #11111b;
  --surface:     #313244;
  --surface-1:   #45475a;
  --overlay:     #6c7086;
  --text:        #cdd6f4;
  --subtext:     #a6adc8;
  --accent:      #89b4fa;
  --accent-soft: #1a2744;
  --accent-dim:  #b4befe;
  --green:       #a6e3a1;
  --green-soft:  #1a2e1e;
  --red:         #f38ba8;
  --red-soft:    #2e1a22;
  --yellow:      #f9e2af;
  --yellow-soft: #2e2418;
  --mauve:       #cba6f7;
  --mauve-soft:  #251a38;
  --teal:        #94e2d5;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  min-height: 100vh;
  transition: background 0.2s, color 0.2s;
}

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

/* ── Layout ───────────────────────────────────────── */
.platform { display: flex; min-height: 100vh; }

/* ── Sidebar ──────────────────────────────────────── */
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--surface);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  transition: background 0.2s, border-color 0.2s, transform 0.25s ease;
  z-index: 100;
}

.sidebar-logo {
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--surface);
  flex-shrink: 0;
}
.sidebar-logo p    { font-size: 15px; font-weight: 600; color: var(--text); }
.sidebar-logo span { font-size: 11px; color: var(--subtext); }

/* ── Regular nav items ────────────────────────────── */
.nav-label {
  font-size: 10px; font-weight: 700; color: var(--overlay);
  text-transform: uppercase; letter-spacing: 0.09em;
  padding: 1rem 1.25rem 0.4rem;
}

.nav-item {
  display: flex; align-items: center; gap: 9px;
  padding: 0.55rem 1.25rem;
  font-size: 13px; color: var(--subtext);
  border-left: 3px solid transparent;
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
}
.nav-item i          { font-size: 16px; flex-shrink: 0; }
.nav-item:hover      { background: var(--surface); color: var(--text); }
.nav-item.active     { background: var(--accent-soft); color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* SQL sub-items (slightly indented) */
.nav-sub { padding-left: 2.75rem; font-size: 12.5px; }
.nav-sub i { font-size: 14px; }

/* ── Collapsible SQL group header ─────────────────── */
.nav-sql-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem 0.4rem;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.nav-sql-header:hover { background: var(--surface); }

.nav-sql-inner {
  display: flex; align-items: center; gap: 6px;
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--overlay);
}
.nav-sql-header:hover .nav-sql-inner { color: var(--text); }
.nav-sql-inner i { font-size: 13px; }

.nav-sql-chevron {
  font-size: 14px; color: var(--overlay);
  transform: rotate(-90deg);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.nav-sql-header.open .nav-sql-chevron { transform: rotate(0deg); }
.nav-sql-header:hover .nav-sql-chevron { color: var(--text); }

#sql-subnav { overflow: hidden; }

/* ── Theme toggle ─────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.65rem 1.25rem;
  border: none; border-top: 1px solid var(--surface);
  background: none; cursor: pointer; font-family: inherit;
  color: var(--subtext); font-size: 12px; width: 100%;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--surface); color: var(--text); }
.theme-toggle-label { display: flex; align-items: center; gap: 8px; }
.theme-toggle i     { font-size: 16px; }

.theme-pill {
  width: 30px; height: 17px;
  background: var(--surface-1);
  border-radius: 9px; position: relative;
  transition: background 0.2s; flex-shrink: 0;
}
.theme-pill.on { background: var(--accent); }
.theme-pill::after {
  content: ''; position: absolute;
  top: 2px; left: 2px;
  width: 13px; height: 13px;
  background: #fff; border-radius: 50%;
  transition: transform 0.2s;
}
.theme-pill.on::after { transform: translateX(13px); }

/* ── Progress section ─────────────────────────────── */
.progress-section {
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--surface);
  flex-shrink: 0;
}
.progress-label {
  font-size: 11px; color: var(--subtext); margin-bottom: 6px;
  display: flex; justify-content: space-between;
}
.progress-bar  { height: 5px; background: var(--surface); border-radius: 3px; }
.progress-fill { height: 100%; width: 0%; background: var(--accent); border-radius: 3px; transition: width 0.4s; }

/* ── Mobile Hamburger ─────────────────────────────── */
.hamburger {
  display: none;
  position: fixed; top: 0.85rem; left: 0.85rem;
  z-index: 300;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  background: var(--sidebar-bg);
  border: 1px solid var(--surface);
  border-radius: 8px; cursor: pointer;
  color: var(--text); font-size: 18px;
  transition: background 0.15s;
}
.hamburger:hover { background: var(--surface); }

.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 99;
}
.sidebar-overlay.visible { display: block; }

/* ── Main Content ─────────────────────────────────── */
.content {
  flex: 1;
  margin-left: 240px;
  padding: 2rem 2.5rem;
  max-width: 820px;
  transition: margin 0.2s;
}

/* ── Page Header ──────────────────────────────────── */
.breadcrumb   { font-size: 11px; color: var(--subtext); margin-bottom: 6px; }
.page-title   {
  font-size: 22px; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 10px; margin-bottom: 4px;
}
.page-title i   { font-size: 24px; color: var(--accent); }
.page-subtitle  { font-size: 13px; color: var(--subtext); margin-bottom: 1.5rem; }

/* ── Info / Warn Boxes ────────────────────────────── */
.info-box {
  background: var(--accent-soft); border-radius: 8px;
  padding: 0.75rem 1rem; margin-bottom: 1.25rem;
  font-size: 12.5px; color: var(--accent);
  display: flex; gap: 8px; align-items: flex-start;
}
.info-box i { font-size: 15px; flex-shrink: 0; margin-top: 1px; }

.warn-box {
  background: var(--yellow-soft); border-radius: 8px;
  padding: 0.75rem 1rem; margin: 0.75rem 0 0.25rem;
  font-size: 12.5px; color: var(--yellow);
  display: flex; gap: 8px; align-items: flex-start;
  border-left: 3px solid var(--yellow);
}
.warn-box i { font-size: 15px; flex-shrink: 0; margin-top: 1px; }

/* ── Section Blocks ───────────────────────────────── */
.section-block {
  background: var(--sidebar-bg);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid var(--surface);
  border-left: 3px solid var(--accent);
  transition: background 0.2s, border-color 0.2s;
}
.section-block h3 { font-size: 13.5px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.section-block p  { font-size: 13px; color: var(--subtext); line-height: 1.8; margin-bottom: 0.5rem; }
.section-block p:last-child { margin-bottom: 0; }

/* ── Code Blocks (hljs handles bg + colours) ─────── */
pre.code-block {
  border-radius: 8px;
  overflow: hidden;
  margin: 0.75rem 0 0.25rem;
  border: 3px solid var(--surface);
}
pre.code-block code {
  padding: 1rem 1.25rem !important;
  font-family: 'Cascadia Code', 'JetBrains Mono', 'Consolas', monospace;
  font-size: 12.5px;
  line-height: 1.75;
  display: block;
}

/* Inline code */
code {
  background: var(--surface);
  color: var(--accent);
  padding: 2px 6px; border-radius: 4px;
  font-family: 'Cascadia Code', 'JetBrains Mono', 'Consolas', monospace;
  font-size: 12px;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ── Content Tables ───────────────────────────────── */
.content-table {
  width: 100%; border-collapse: collapse;
  margin: 0.75rem 0 0.25rem;
  font-size: 12.5px; border-radius: 8px;
  overflow: hidden; border: 1px solid var(--surface);
}
.content-table thead th {
  background: var(--accent); color: #fff;
  padding: 0.5rem 0.75rem; text-align: left;
  font-weight: 600; font-size: 11.5px;
}
.content-table tbody td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--surface);
  vertical-align: top; color: var(--text);
}
.content-table tbody tr:last-child td { border-bottom: none; }
.content-table tbody tr:nth-child(even) td { background: var(--bg); }
.content-table code { font-size: 11.5px; }

/* ── Module Cards (index) ─────────────────────────── */
.module-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px; margin-bottom: 1.5rem;
}

.module-card {
  background: var(--sidebar-bg);
  border: 1px solid var(--surface);
  border-radius: 10px; padding: 1.1rem 1.25rem;
  display: block;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.2s;
}
.module-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}
.module-card-icon   { font-size: 24px; margin-bottom: 8px; }
.module-card-title  { font-size: 14px; font-weight: 600; color: var(--text); }
.module-card-desc   { font-size: 12px; color: var(--subtext); margin-top: 3px; }
.module-card-status { margin-top: 10px; }

/* M164 SQL full-width card */
.sql-card {
  grid-column: 1 / -1;
  background: var(--sidebar-bg);
  border: 1px solid var(--surface);
  border-radius: 10px; padding: 1.1rem 1.25rem;
  transition: background 0.2s;
}
.sql-card-header   { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.sql-blocks-grid   { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.sql-block-link {
  display: block; background: var(--bg);
  border: 1px solid var(--surface);
  border-radius: 8px; padding: 0.6rem 0.75rem;
  text-align: center; font-size: 11.5px; color: var(--text);
  transition: all 0.15s;
}
.sql-block-link:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.sql-block-link.done  { border-color: var(--green); background: var(--green-soft); color: var(--green); }
.sql-block-link .block-num { font-weight: 700; font-size: 10px; color: var(--subtext); display: block; margin-bottom: 3px; }

/* ── Badges ───────────────────────────────────────── */
.badge {
  display: inline-block; font-size: 10px;
  padding: 3px 9px; border-radius: 99px; font-weight: 600;
}
.badge-todo { background: var(--surface); color: var(--subtext); }
.badge-done { background: var(--green-soft); color: var(--green); }
.badge-wip  { background: var(--yellow-soft); color: var(--yellow); }

/* ── Quiz ─────────────────────────────────────────── */
.quiz-container {
  background: var(--sidebar-bg);
  border: 1px solid var(--surface);
  border-radius: 10px; padding: 1.25rem 1.5rem; margin-top: 1.5rem;
  transition: background 0.2s;
}
.quiz-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1rem; padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--surface);
}
.quiz-title   { font-size: 13.5px; font-weight: 600; color: var(--text); display: flex; align-items: center; gap: 6px; }
.quiz-title i { color: var(--accent); }
.quiz-counter { font-size: 11px; color: var(--subtext); }

.question-text { font-size: 14px; color: var(--text); line-height: 1.6; margin-bottom: 1rem; font-weight: 500; }

.answer-option {
  display: flex; align-items: center; gap: 10px;
  padding: 0.65rem 1rem; border: 1px solid var(--surface);
  border-radius: 8px; margin-bottom: 8px; cursor: pointer;
  font-size: 13px; color: var(--text);
  transition: all 0.15s; background: var(--bg);
}
.answer-option:hover   { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.answer-option.correct { border-color: var(--green); background: var(--green-soft); color: var(--green); }
.answer-option.wrong   { border-color: var(--red); background: var(--red-soft); color: var(--red); }
.answer-option.disabled { pointer-events: none; }

.option-dot { width: 16px; height: 16px; border-radius: 50%; border: 1.5px solid var(--surface-1); flex-shrink: 0; }
.answer-option.correct .option-dot { border-color: var(--green); background: var(--green); }
.answer-option.wrong   .option-dot { border-color: var(--red);   background: var(--red);   }

.feedback {
  margin-top: 0.75rem; padding: 0.65rem 1rem;
  border-radius: 8px; font-size: 12.5px; display: none; line-height: 1.5; gap: 6px;
}
.feedback.correct { background: var(--green-soft); color: var(--green); display: flex; }
.feedback.wrong   { background: var(--red-soft);   color: var(--red);   display: flex; }

.quiz-actions { margin-top: 1rem; display: flex; gap: 8px; }

/* ── Buttons ──────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0.5rem 1.1rem; border-radius: 8px; font-size: 13px;
  cursor: pointer; border: 1px solid var(--surface);
  background: var(--sidebar-bg); color: var(--text);
  transition: background 0.15s, border-color 0.15s; font-family: inherit;
}
.btn:hover           { background: var(--surface); }
.btn.primary         { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover   { opacity: 0.88; }
.btn.success         { background: var(--green); color: #fff; border-color: var(--green); pointer-events: none; }

/* ── Page Navigation ──────────────────────────────── */
.page-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 2rem; padding-top: 1.25rem;
  border-top: 1px solid var(--surface);
  flex-wrap: wrap; gap: 8px;
}
.page-nav-right { margin-left: auto; }

/* ── Placeholder ──────────────────────────────────── */
.placeholder-section {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 280px; text-align: center;
  background: var(--sidebar-bg);
  border: 2px dashed var(--surface);
  border-radius: 12px; margin-top: 1.5rem; padding: 2rem;
  transition: background 0.2s;
}
.placeholder-section .ph-icon { font-size: 40px; color: var(--overlay); margin-bottom: 12px; }
.placeholder-section h3 { font-size: 16px; font-weight: 600; color: var(--overlay); margin-bottom: 6px; }
.placeholder-section p  { font-size: 12.5px; color: var(--overlay); }

/* ── Footer ───────────────────────────────────────── */
.site-footer {
  margin-left: 240px;
  padding: 0.9rem 2.5rem;
  border-top: 1px solid var(--surface);
  font-size: 11px; color: var(--overlay);
  line-height: 1.6; background: var(--bg);
  transition: background 0.2s, color 0.2s;
}

/* ── Mobile Responsive ────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    box-shadow: 4px 0 24px rgba(0,0,0,0.25);
  }

  .sidebar-logo {
    padding-top: 0.75rem;
    padding-left: 3.25rem;
    padding-right: 0.75rem;
    min-height: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .sidebar.mobile-open { transform: translateX(0); }

  .content {
    margin-left: 0 !important;
    padding: 1.25rem;
    padding-top: 4rem;
    max-width: 100%;
  }

  .module-cards      { grid-template-columns: 1fr; }
  .sql-blocks-grid   { grid-template-columns: 1fr 1fr !important; }
  .page-nav          { flex-direction: column; }
  .page-nav-right    { margin-left: 0; width: 100%; }
  .page-nav .btn     { width: 100%; justify-content: center; }
  .content-table     { font-size: 11.5px; }
  .content-table td,
  .content-table th  { padding: 0.4rem 0.5rem; }
  .site-footer       { margin-left: 0; }
}