/* ===== Theme variables ===== */
:root {
  --bg: #fafafa;
  --bg-surface: #fff;
  --text: #1a1a1a;
  --text-muted: #555;
  --text-faded: #999;
  --border: #e0e0e0;
  --border-light: #ccc;

  /* Headings */
  --h1: #1a237e;
  --h2: #283593;
  --h3: #3949ab;
  --h4: #5c6bc0;

  /* Accent */
  --accent: #3f51b5;
  --accent-light: #e8eaf6;
  --accent-mid: #c5cae9;
  --accent-dark: #1a237e;
  --accent-fill: linear-gradient(90deg, #3f51b5, #7c4dff);

  /* Blocks */
  --mh-bg: linear-gradient(135deg, #e8eaf6, #c5cae9);
  --pb-bg: #e8f5e9;
  --pb-border: #2e7d32;
  --pb-title: #1b5e20;
  --tb-bg: #fff8e1;
  --tb-border: #f9a825;
  --tb-accent: #e65100;
  --vs-bg: #f3e5f5;
  --vs-border: #ce93d8;
  --vi-bg: #fff;
  --vi-border: #9c27b0;
  --vi-title: #6a1b9a;
  --ds-bg: #e3f2fd;
  --ds-border: #90caf9;
  --sb-bg: #fce4ec;
  --sb-border: #e91e63;
  --sb-title: #880e4f;

  /* Table */
  --th-bg: #3f51b5;
  --tr-even: #f5f5f5;

  /* Code */
  --code-bg: #f5f5f5;
  --code-color: #c62828;

  /* Tags */
  --tg-bg: #e8eaf6;
  --tg-color: #283593;
  --tg-border: #c5cae9;
}

[data-theme='dark'] {
  --bg: #121212;
  --bg-surface: #1e1e1e;
  --text: #e0e0e0;
  --text-muted: #aaa;
  --text-faded: #666;
  --border: #333;
  --border-light: #444;

  --h1: #9fa8da;
  --h2: #b0bec5;
  --h3: #90caf9;
  --h4: #b39ddb;

  --accent: #7c4dff;
  --accent-light: #1a1a2e;
  --accent-mid: #2a2a4a;
  --accent-dark: #b39ddb;
  --accent-fill: linear-gradient(90deg, #7c4dff, #b388ff);

  --mh-bg: linear-gradient(135deg, #1a1a2e, #2a2a4a);
  --pb-bg: #1b2e1b;
  --pb-border: #4caf50;
  --pb-title: #81c784;
  --tb-bg: #2e2a1b;
  --tb-border: #ffc107;
  --tb-accent: #ffb74d;
  --vs-bg: #2a1a2e;
  --vs-border: #ab47bc;
  --vi-bg: #1e1e1e;
  --vi-border: #ce93d8;
  --vi-title: #ce93d8;
  --ds-bg: #1a2a3e;
  --ds-border: #42a5f5;
  --sb-bg: #2e1a1e;
  --sb-border: #f06292;
  --sb-title: #f48fb1;

  --th-bg: #37474f;
  --tr-even: #252525;

  --code-bg: #2a2a2a;
  --code-color: #ff8a80;

  --tg-bg: #1a1a2e;
  --tg-color: #b0bec5;
  --tg-border: #444;
}

/* ===== Base ===== */
* {
  box-sizing: border-box;
}
body {
  font-family: 'Segoe UI', Calibri, Arial, sans-serif;
  max-width: 800px;
  margin: 30px auto;
  padding: 0 20px;
  color: var(--text);
  line-height: 1.7;
  font-size: 14px;
  background: var(--bg);
  transition: background 0.3s, color 0.3s;
}
h1 {
  color: var(--h1);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 8px;
  font-size: 24px;
  margin-top: 40px;
}
h2 {
  color: var(--h2);
  font-size: 19px;
  margin-top: 26px;
}
h3 {
  color: var(--h3);
  font-size: 15px;
  margin-top: 16px;
}
h4 {
  color: var(--h4);
  font-size: 14px;
  margin-top: 12px;
}
table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
}
th {
  background: var(--th-bg);
  color: #fff;
  padding: 8px 12px;
  text-align: left;
  font-size: 13px;
}
td {
  padding: 7px 12px;
  border: 1px solid var(--border-light);
  font-size: 13px;
}
tr:nth-child(even) {
  background: var(--tr-even);
}
a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}
a:hover {
  text-decoration: underline;
  color: var(--accent-dark);
}
code {
  background: var(--code-bg);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 13px;
  color: var(--code-color);
}
hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: 32px 0;
}

/* ===== Content blocks ===== */
.mh {
  background: var(--mh-bg);
  padding: 16px 20px;
  border-radius: 8px;
  margin: 32px 0 12px;
  border-left: 5px solid var(--accent);
}
.mh h1 {
  border: none;
  margin: 0;
  padding: 0;
}
.mh p {
  margin: 4px 0 0;
}
.pb {
  background: var(--pb-bg);
  border: 2px solid var(--pb-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
}
.pb h3 {
  color: var(--pb-title);
  margin-top: 0;
}
.tb {
  background: var(--tb-bg);
  border: 2px solid var(--tb-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
}
.tb b {
  color: var(--tb-accent);
}
.vs {
  background: var(--vs-bg);
  border: 1px solid var(--vs-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
}
.vi {
  border-left: 4px solid var(--vi-border);
  padding: 7px 14px;
  margin: 6px 0;
  background: var(--vi-bg);
  border-radius: 0 6px 6px 0;
}
.vi b {
  color: var(--vi-title);
}
.ds {
  background: var(--ds-bg);
  border: 1px solid var(--ds-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
}
.sb {
  background: var(--sb-bg);
  border: 2px solid var(--sb-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 14px 0;
}
.sb h3 {
  color: var(--sb-title);
  margin-top: 0;
}

/* ===== Tags & badges ===== */
.mt {
  display: inline-block;
  background: #c62828;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.ot {
  display: inline-block;
  background: #7b1fa2;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.nt {
  display: inline-block;
  background: #e91e63;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.st {
  display: inline-block;
  background: #00695c;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
}
.tg {
  display: inline-block;
  background: var(--tg-bg);
  color: var(--tg-color);
  padding: 2px 9px;
  border-radius: 12px;
  font-size: 11px;
  margin: 2px;
  border: 1px solid var(--tg-border);
}

/* ===== Checklist ===== */
.cl {
  list-style: none;
  padding-left: 4px;
}
.cl li {
  margin-bottom: 5px;
}
.ci {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 3px 0;
}
.ci input[type='checkbox'] {
  margin-top: 3px;
  width: 17px;
  height: 17px;
  cursor: pointer;
  accent-color: var(--accent);
}
.ci label {
  cursor: pointer;
  flex: 1;
}
.ci.done label {
  text-decoration: line-through;
  color: var(--text-faded);
}
.ctr {
  text-align: center;
}

/* ===== Progress bar ===== */
.progress-global {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  margin: 0 -20px;
  transition: background 0.3s;
}
.progress-bar-wrap {
  background: var(--border);
  border-radius: 10px;
  height: 22px;
  overflow: hidden;
  position: relative;
}
.progress-bar-fill {
  background: var(--accent-fill);
  height: 100%;
  border-radius: 10px;
  transition: width 0.4s ease;
  min-width: 0;
}
.progress-text {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  text-align: center;
  line-height: 22px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
.section-progress {
  display: inline-block;
  background: var(--accent-light);
  color: var(--h2);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 12px;
  margin-left: 8px;
}

/* ===== Progress header ===== */
.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.progress-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== Section nav ===== */
.section-nav {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  overflow-x: auto;
}
.nav-chip {
  padding: 3px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--h2);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}
.nav-chip:hover {
  background: var(--accent-mid);
  text-decoration: none;
}
.nav-chip.active {
  background: var(--accent);
  color: #fff;
}

/* ===== Buttons ===== */
.reset-btn {
  background: #ef5350;
  color: #fff;
  border: none;
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}
.reset-btn:hover {
  background: #c62828;
}

/* ===== Landing page ===== */
.landing-body {
  position: relative;
  max-width: 960px;
}
.landing-hero {
  text-align: center;
  padding: 60px 20px 40px;
  background: var(--accent-fill);
  border-radius: 0 0 24px 24px;
  margin: -30px -20px 0;
  position: relative;
  overflow: hidden;
}
.landing-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.12) 0%, transparent 60%),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0%, transparent 50%);
}
.landing-hero h1 {
  border: none;
  font-size: 32px;
  margin: 0;
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.5px;
  position: relative;
}
.landing-hero .subtitle {
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  margin-top: 10px;
  position: relative;
}
.landing-hero .landing-theme {
  position: absolute;
  top: 16px;
  right: 16px;
  border-color: rgba(255,255,255,0.3);
  color: #fff;
}
.landing-hero .landing-theme:hover {
  border-color: rgba(255,255,255,0.6);
}
.landing-section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 700;
  margin: 40px 0 16px;
}
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.guide-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.guide-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  text-decoration: none;
}
[data-theme='dark'] .guide-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.guide-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.guide-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.guide-card h2 {
  margin: 0;
  font-size: 18px;
  color: var(--h1);
  font-weight: 700;
}
.guide-card-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}
.guide-card p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.guide-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
}
.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}
.guide-status {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.guide-status.active {
  background: #e8f5e9;
  color: #2e7d32;
}
[data-theme='dark'] .guide-status.active {
  background: #1b2e1b;
  color: #81c784;
}
.guide-status.soon {
  background: var(--accent-light);
  color: var(--text-muted);
}
.guide-arrow {
  font-size: 18px;
  color: var(--accent);
  transition: transform 0.2s;
}
.guide-card:hover .guide-arrow {
  transform: translateX(4px);
}
.landing-footer {
  text-align: center;
  padding: 40px 0 20px;
  font-size: 12px;
  color: var(--text-faded);
}

/* ===== Theme toggle ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  padding: 2px 8px;
  line-height: 1;
  transition: border-color 0.2s;
}
.theme-toggle:hover {
  border-color: var(--accent);
}