/*
Theme Name: NautiAcademy Child
Theme URI: https://nauti.academy
Description: NautiAcademy child theme. Inherits design tokens from SeaSignal (background/accent colors only) — no code reuse. Parent theme: underscores (_s). Swap the "Template:" line below if a different parent theme is used.
Author: NautiAcademy
Template: underscores
Version: 0.1.0
Text Domain: nauti-academy-child
*/

/* ==========================================================================
   Design tokens (inherited from SeaSignal — colors only, per handover 2-2)
   ========================================================================== */
:root {
  --na-bg: #F2F2F4;
  --na-accent: #534AB7;
  --na-accent-hover: #443C99;
  --na-text: #1C1C1E;
  --na-text-muted: #6B6B72;
  --na-card-bg: #FFFFFF;
  --na-border: #E1E1E5;
  --na-radius: 10px;

  /* Level badge colors */
  --na-level1: #2E9E6B;
  --na-level2: #C58A1E;
  --na-level3: #C2452E;
}

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

a {
  color: var(--na-accent);
}
a:hover {
  color: var(--na-accent-hover);
}

/* ==========================================================================
   Site-wide language toggle (EN/JA)
   ========================================================================== */
.na-lang-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 500;
  display: inline-flex;
  background: var(--na-card-bg);
  border: 1px solid var(--na-border);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}
.na-lang-btn {
  border: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--na-text-muted);
}
.na-lang-btn.is-active {
  background: var(--na-accent);
  color: #fff;
}

/* ==========================================================================
   Course archive grid
   ========================================================================== */
.na-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

.na-course-card {
  background: var(--na-card-bg);
  border: 1px solid var(--na-border);
  border-radius: var(--na-radius);
  padding: 20px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.na-course-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(83, 74, 183, 0.12);
}

.na-course-card__level {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 999px;
  color: #fff;
  margin-bottom: 10px;
}
.na-course-card__level--1 { background: var(--na-level1); }
.na-course-card__level--2 { background: var(--na-level2); }
.na-course-card__level--3 { background: var(--na-level3); }

.na-course-card__title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
}
.na-course-card__title a {
  color: var(--na-text);
  text-decoration: none;
}
.na-course-card__title a:hover {
  color: var(--na-accent);
}

.na-course-card__excerpt {
  font-size: 14px;
  color: var(--na-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Single course
   ========================================================================== */
.na-course-single {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 20px;
}

.na-course-single__meta {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--na-text-muted);
}

.na-course-single__lang-toggle {
  display: inline-flex;
  border: 1px solid var(--na-border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 24px;
}
.na-course-single__lang-toggle button {
  border: none;
  background: var(--na-card-bg);
  padding: 6px 16px;
  font-size: 13px;
  cursor: pointer;
}
.na-course-single__lang-toggle button.is-active {
  background: var(--na-accent);
  color: #fff;
}

.na-course-single__body {
  font-size: 16px;
  line-height: 1.75;
}
.na-course-single__body h2 {
  font-size: 22px;
  margin-top: 2em;
}
.na-course-single__body h3 {
  font-size: 18px;
  margin-top: 1.8em;
}

/* Tables inside course content */
.na-course-single__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 14px;
  line-height: 1.55;
}
.na-course-single__body th,
.na-course-single__body td {
  border: 1px solid var(--na-border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.na-course-single__body th {
  background: #FAFAFB;
  font-weight: 700;
  font-size: 13px;
}
.na-course-single__body tr:nth-child(even) td {
  background: #FCFCFD;
}

/* Tables overflow on narrow screens — allow horizontal scroll */
@media (max-width: 700px) {
  .na-course-single__body table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

.na-course-single__review-notice {
  margin-top: 40px;
  padding: 14px 18px;
  background: #FDF6E3;
  border: 1px solid #E7D8A0;
  border-radius: var(--na-radius);
  font-size: 13px;
  color: #6B5A1E;
}

.na-course-single__revision-link {
  margin-top: 12px;
  padding: 12px 18px;
  background: #FCEEEC;
  border: 1px solid #E7B8AF;
  border-radius: var(--na-radius);
  font-size: 13px;
}