/* ───────────────────── Color tokens (light mode) ───────────────────── */

:root {
  --bg: #f5f5f7;
  --text: #1d1d1f;
  --text-secondary: #3a3a3c;
  --text-muted: #8e8e93;

  --card-bg: #fff;
  --card-border: transparent;
  --card-shadow: rgba(0,0,0,0.06);
  --card-shadow-hover: rgba(0,0,0,0.10);

  --accent: #1d9e75;
  --accent-bg: #e8f7f2;
  --accent-contrast: #1a3a2e;
  --on-accent: #fff;

  --border: #f2f2f7;
  --divider: #d0d0d0;
  --contact-bg: #f5f5f7;
  --arrow: #c0c0c5;

  /* Header / app logo — light variant: green tile, white glyph */
  --header-bg: #1d9e75;
  --header-text: #fff;
  --header-logo: #fff;
}

/* ───────────────────── Color tokens (dark mode) ────────────────────── */

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --text: #f5f5f7;
    --text-secondary: #c7c7cc;
    --text-muted: #8e8e93;

    --card-bg: #1c1c1e;
    --card-border: #2c2c2e;
    --card-shadow: rgba(0,0,0,0.5);
    --card-shadow-hover: rgba(0,0,0,0.7);

    --accent: #2ecc8f;
    --accent-bg: #14302a;
    --accent-contrast: #d7f5ea;
    --on-accent: #0d1311;

    --border: #2c2c2e;
    --divider: #3a3a3c;
    --contact-bg: #2c2c2e;
    --arrow: #6e6e73;

    /* Header / app logo — dark variant: near-black tile, green glyph */
    --header-bg: #0d1311;
    --header-text: #f5f5f7;
    --header-logo: #2ecc8f;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ─────────────────────────── Header ─────────────────────────── */

header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 48px 24px 36px;
  text-align: center;
}

/* App logo — the "$" glyph drawn from logo.svg, recolored per color scheme */
header .logo-icon {
  display: block;
  width: 84px;
  height: 84px;
  margin: 0 auto 14px;
  background-color: var(--header-logo);
  -webkit-mask: url(logo.svg) center / contain no-repeat;
  mask: url(logo.svg) center / contain no-repeat;
}

header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

header p {
  margin-top: 6px;
  font-size: 14px;
  opacity: 0.85;
}

/* ─────────────────────── Back navigation ────────────────────── */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 20px 0 0 24px;
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.back-link:hover { text-decoration: underline; }

/* ─────────────────────── Language toggle ────────────────────── */

.lang-toggle {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.lang-toggle button {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-toggle button.active,
.lang-toggle button:hover {
  background: var(--accent);
  color: var(--on-accent);
}

/* ─────────────────────────── Layout ─────────────────────────── */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px var(--card-shadow);
}

.section h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.section h2 .emoji { font-size: 22px; }

/* Chevron indicator for collapsible sections */
.section h2::after {
  content: "›";
  margin-left: auto;
  font-size: 26px;
  line-height: 1;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
}

.section:not(.collapsed) h2::after {
  transform: rotate(90deg);
}

/* Collapsed sections show only their title */
.section.collapsed {
  padding-bottom: 28px;
}

.section.collapsed h2 {
  margin-bottom: 0;
}

.section.collapsed > :not(h2) {
  display: none;
}

.section h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin: 18px 0 8px;
}

.section p { margin-bottom: 12px; font-size: 15px; color: var(--text-secondary); }
.section p:last-child { margin-bottom: 0; }

.section ul {
  list-style: none;
  padding: 0;
  margin-bottom: 12px;
}

.section ul li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 6px 0 6px 20px;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.section ul li:last-child { border-bottom: none; }

.section ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Numbered steps (for help sections) */
.section ol {
  margin: 0 0 12px 20px;
  padding: 0;
}

.section ol li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 4px 0;
}

/* Links inside content */
.section a,
.highlight a,
.contact-box a,
.updated a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.section a:hover,
.highlight a:hover,
.contact-box a:hover,
.updated a:hover { text-decoration: underline; }

/* ───────────────────────── Components ───────────────────────── */

.badge {
  display: inline-block;
  background: var(--accent-bg);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-left: 8px;
  vertical-align: middle;
}

.highlight {
  background: var(--accent-bg);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 14px 16px;
  margin: 14px 0;
  font-size: 15px;
  color: var(--accent-contrast);
}

.contact-box {
  background: var(--contact-bg);
  border-radius: 12px;
  padding: 20px;
  margin-top: 12px;
}

.divider {
  border: none;
  border-top: 2px dashed var(--divider);
  margin: 40px 0;
}

.updated {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 32px;
}

/* ────────────────────────── Menu hub ───────────────────────── */

.menu {
  display: grid;
  gap: 16px;
}

.menu-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 4px var(--card-shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}

.menu-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--card-shadow-hover);
}

.menu-card .menu-icon {
  font-size: 36px;
  flex-shrink: 0;
}

.menu-card .menu-text h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 2px;
}

.menu-card .menu-text p {
  font-size: 14px;
  color: var(--text-muted);
}

.menu-card .menu-arrow {
  margin-left: auto;
  color: var(--arrow);
  font-size: 22px;
  flex-shrink: 0;
}

/* Buttons / call-to-action links */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 24px;
  transition: opacity 0.15s;
}

.btn:hover { opacity: 0.9; }

/* Language section visibility (toggled by script.js) */
[lang-section="en"] { display: none; }