/* ============================================================
   Design tokens
   ============================================================ */
:root {
    /* Backgrounds */
    --c-bg:             #1a1a1a;
    --c-surface:        #2d2d2d;
    --c-surface-hover:  #333;
    --c-surface-raised: #3a3a3a;

    /* Borders */
    --c-border:         #2a2a2a;
    --c-border-strong:  #3a3a3a;
    --c-border-card:    #4a4a4a;

    /* Text */
    --c-text:           #e0e0e0;
    --c-text-sub:       #b0b0b0;
    --c-text-muted:     #888;
    --c-text-dim:       #666;
    --c-text-faint:     #444;

    /* Accent */
    --c-accent:         #6b8cae;
    --c-accent-dark:    #5a7a9c;
    --c-accent-light:   #8aaccf;
    --c-accent-bg:      #4a5f7a;

    /* Status */
    --c-warn:           #f39c12;
    --c-warn-bg:        #4a3a1a;
    --c-warn-text:      #c0a060;
    --c-danger:         #e74c3c;
    --c-success:        #90c090;

    /* Typography */
    --font-ja:  'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
    --font-sys: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

    /* Border radius */
    --r-sm:  10px;
    --r-md:  12px;
    --r-lg:  16px;
    --r-xl:  20px;
}

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

/* ============================================================
   App header (shared across all apps)
   ============================================================ */
.app-header {
    background: var(--c-surface-raised);
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--c-border-strong);
}

.app-header h1 { font-size: 20px; font-weight: 700; }
.app-header p  { font-size: 12px; color: var(--c-text-muted); margin-top: 4px; }

/* ============================================================
   App footer (shared across all apps)
   ============================================================ */
.app-footer {
    text-align: center;
    padding: 20px;
    color: var(--c-text-faint);
    font-size: 12px;
    border-top: 1px solid var(--c-border);
}

.app-footer-version {
    margin-bottom: 4px;
}

.app-footer a {
    color: var(--c-text-dim);
    text-decoration: none;
    transition: color 0.2s;
}

.app-footer a:hover {
    color: var(--c-text);
}

/* ============================================================
   Nav (shared base — each page extends via its own <style>)
   ============================================================ */
nav {
    border-bottom: 1px solid var(--c-border);
}

/* ============================================================
   Footer (shared base)
   ============================================================ */
footer {
    border-top: 1px solid var(--c-border);
}

/* ============================================================
   Guide sections  (used in apps/index.html documentation)
   ============================================================ */
.guide {
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 20px;
}

.guide-app {
    margin-bottom: 60px;
}

.guide-app-header {
    border-bottom: 2px solid var(--c-border-strong);
    padding-bottom: 12px;
    margin-bottom: 24px;
}

.guide-app-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--c-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.guide-section {
    margin-bottom: 32px;
}

.guide-section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 12px;
}

.guide-card {
    background: var(--c-surface);
    border-radius: var(--r-md);
    padding: 20px;
    margin-bottom: 12px;
}

.guide-card:last-child { margin-bottom: 0; }

.guide-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-accent);
    margin-bottom: 8px;
}

.guide-card-body {
    font-size: 14px;
    color: var(--c-text-sub);
    line-height: 1.7;
}

.guide-card-body p { margin-bottom: 8px; }
.guide-card-body p:last-child { margin-bottom: 0; }

.guide-card-list {
    font-size: 14px;
    color: var(--c-text-muted);
    line-height: 1.8;
    padding-left: 20px;
}

.guide-card-note {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.6;
}

.guide-card-warn {
    font-size: 13px;
    color: var(--c-warn);
    line-height: 1.6;
}

.guide-card-accent-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--c-accent);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}
.guide-card-accent-link:hover { color: var(--c-accent-light); }

.guide-divider {
    border-top: 2px solid var(--c-border);
    margin: 60px 0;
}

/* ============================================================
   Changelog  (used in apps/index.html)
   ============================================================ */
.changelog-entry {
    margin-bottom: 24px;
}
.changelog-entry:last-child { margin-bottom: 0; }

.changelog-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.changelog-date {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-accent);
}

.changelog-app-name {
    font-size: 12px;
    color: var(--c-text-dim);
}

.changelog-card {
    background: var(--c-surface);
    border-radius: var(--r-md);
    padding: 16px;
    border-left: 3px solid var(--c-accent);
}

.changelog-list {
    font-size: 14px;
    color: var(--c-text-sub);
    line-height: 1.8;
    padding-left: 20px;
    margin: 0;
}

/* ============================================================
   Privacy detail  (used in src/index.html)
   ============================================================ */
.privacy-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 24px;
}

.privacy-detail-header {
    text-align: center;
    margin-bottom: 40px;
}

.privacy-detail-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 12px;
}

.privacy-detail-subtitle {
    font-size: 14px;
    color: var(--c-text-dim);
}

.privacy-detail-grid {
    display: grid;
    gap: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.privacy-detail-card {
    background: var(--c-surface);
    border-radius: var(--r-lg);
    padding: 24px;
    border: 1px solid var(--c-border-strong);
}

.privacy-detail-card-inner {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.privacy-detail-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.privacy-detail-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 8px;
}

.privacy-detail-card-body {
    font-size: 14px;
    color: var(--c-text-muted);
    line-height: 1.7;
}