/* =========================================
   1. CSS Variables
   ========================================= */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --heading-color: #222222;
    --link-color: #d35400;      /* classic orange */
    --link-hover: #e67e22;
    --border-color: #eeeeee;    /* divider */
    --code-bg: #f6f8fa;         /* code block background */
    --code-border: #e1e4e8;
    --muted-color: #666666;     /* subtitles, quotes */
    --meta-color: #999999;      /* dates, footer text */
    --subtle-bg: #fafafa;       /* zebra rows, hover/card backgrounds */
    --mono-font: 'Fira Code', 'Menlo', 'Monaco', 'Courier New', monospace;
}

/* =========================================
   2. Reset & Base Styles
   ========================================= */
body {
    /* Noto Sans TC loaded via Google Fonts in base.html; Latin fallback stack after it */
    font-family: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.65;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* =========================================
   3. Layout
   ========================================= */
.container {
    max-width: 740px; /* optimal reading width */
    margin: 0 auto;
    padding: 40px 20px;
}

/* =========================================
   4. Header & Navigation
   ========================================= */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 20px;
    margin-bottom: 50px;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}

nav {
    display: flex;
    align-items: center;
}

nav a {
    margin-left: 20px;
    color: var(--muted-color);
    font-size: 0.95rem;
    font-weight: 500;
}

nav a:hover {
    color: var(--link-color);
}

/* Mobile: logo + 4 nav links don't fit side by side, so stack them —
   logo on top, nav below, links wrapping onto extra lines if needed */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 35px;
    }

    nav {
        flex-wrap: wrap;
        gap: 6px 18px;     /* row gap / column gap between links */
    }

    nav a {
        margin-left: 0;    /* spacing handled by gap above */
    }
}

/* =========================================
   5. Typography (Global)
   ========================================= */
h1, h2, h3 {
    color: var(--heading-color);
    font-weight: 700;
    line-height: 1.3;
}

h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

h2 {
    font-size: 1.8rem;
    margin-top: 50px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

h3 {
    font-size: 1.4rem;
    margin-top: 30px;
    margin-bottom: 15px;
}

p {
    margin-bottom: 1.5em;
    font-size: 1.05rem;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--muted-color);
    font-weight: 300;
    margin-top: -5px;
    margin-bottom: 16px;
}

.intro-bio {
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 60ch;
    margin-top: 0;
    margin-bottom: 30px;
}

/* =========================================
   6. Blog & Markdown Styles
   ========================================= */

/* Post list (Blog Index) */
.post-preview {
    display: flex;
    flex-direction: row;
    align-items: end;
    gap: 1rem;
    padding: 8px 0;
}

.post-preview h2,
.post-preview h3 {
    margin: 0;
    font-size: 16px;
    border: none;
    padding-bottom: 0;
    line-height: 1.6;
    
}

.post-preview h2 a,
.post-preview h3 a {
    color: var(--heading-color);
    font-weight: normal;
}

.post-preview h2 a:hover,
.post-preview h3 a:hover {
    color: var(--link-color);
}

.post-date {
    font-size: 14px;
    line-height: 1.6;
    color: var(--meta-color);
    display: block;
    font-family: monospace; /* monospace dates */
}

/* Project list (Home) */
.project-preview {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
}

.project-preview:last-of-type {
    border-bottom: none;
}

.project-preview h3 {
    margin: 0;
    font-size: 1.1rem;
}

.project-preview h3 a {
    color: var(--heading-color);
}

.project-preview h3 a:hover {
    color: var(--link-color);
}

.project-desc {
    margin: 4px 0 0;
    color: var(--muted-color);
    font-size: 0.95rem;
    line-height: 1.55;
}

/* Skills list (Home) */
.skill-list {
    margin: 0;
}

.skill-group {
    display: flex;
    gap: 1.5rem;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.skill-group:last-child {
    border-bottom: none;
}

.skill-group dt {
    flex: 0 0 140px;
    color: var(--meta-color);
    font-size: 14px;
    font-family: monospace;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.6;
}

.skill-group dd {
    margin: 0;
    color: var(--text-color);
    font-size: 16px;
    line-height: 1.6;
}

@media (max-width: 540px) {
    .skill-group {
        flex-direction: column;
        gap: 4px;
    }
    .skill-group dt {
        flex: none;
    }
}

/* Single post page */
.post-header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
    flex-direction: column;
    align-items: start;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    color: var(--meta-color);
    font-size: 0.9rem;
    margin-top: 10px;
}

.post-meta span + span::before {
    content: "/";
    margin-right: 0.5rem;
    color: var(--border-color);
}

.post-meta .post-category {
    color: var(--muted-color);
    font-weight: 500;
}

/* Breadcrumb — sits after the article, same minimal language as post-meta */
.post-breadcrumb {
    margin-top: 40px;
    font-size: 0.85rem;
    color: var(--meta-color);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.post-breadcrumb a {
    color: var(--meta-color);
    margin: 0;
}

.post-breadcrumb a:hover {
    color: var(--link-color);
}

.post-breadcrumb-sep {
    color: var(--border-color);
}

.post-breadcrumb [aria-current="page"] {
    color: var(--muted-color);
}

/* Breadcrumb placed above the content (tag pages) instead of after the article */
.post-breadcrumb-top {
    margin-top: 0;
    margin-bottom: 32px;
}

/* Prev / Next post navigation */
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.post-nav-link {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--heading-color);
    text-decoration: none;
    transition: border-color 0.2s, background-color 0.2s;
    margin: 0;
}

.post-nav-link:hover {
    border-color: var(--muted-color);
    background-color: var(--subtle-bg);
    text-decoration: none;
}

.post-nav-prev { text-align: left; }
.post-nav-next { text-align: right; }

.post-nav-label {
    font-size: 0.8rem;
    color: var(--meta-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.post-nav-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--heading-color);
}

@media (max-width: 600px) {
    .post-nav {
        grid-template-columns: 1fr;
    }
    .post-nav-next { text-align: left; }
}

/* Markdown content */
/* Article text sized to match blog.kyomind.tw (19px base, 1.65 line-height) */
.entry {
    font-size: 19px;
    line-height: 1.65;
}

.entry p {
    font-size: inherit; /* override the global 1.05rem p rule */
    margin: 0.5em 0 1.2em; /* match kyomind paragraph spacing */
}

/* Match kyomind heading spacing inside articles (tight bottom, prose provides the gap) */
.entry h2,
.entry h3,
.entry h4 {
    margin-top: 1.5rem;
    margin-bottom: 0;
}

.entry blockquote {
    border-left: 4px solid var(--border-color);
    padding-left: 15px;
    margin-left: 0;
    color: var(--muted-color);
    font-style: italic;
}

.entry ul, .entry ol {
    margin-top: 0.2em;    /* match kyomind list spacing */
    margin-bottom: 1.2em;
    padding-left: 1.5em;
}

.entry li {
    margin-bottom: 0.5em;
}

/* Responsive images */
.entry img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    display: block;
    margin: 30px auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}


/* Table styles */
.entry table {
    display: block;
    width: max-content;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-collapse: collapse;
    margin-bottom: 1.5em;
    font-size: 0.95rem;
}
.entry th,
.entry td {
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    text-align: left;
    vertical-align: top;
    white-space: nowrap;
}
.entry td:first-child {
    white-space: normal;
    min-width: 180px;
}
.entry th {
    background-color: var(--code-bg);
    font-weight: 600;
    color: var(--heading-color);
}
.entry tr:nth-child(even) td {
    background-color: var(--subtle-bg);
}

/* Tag chips */
.tag-chip {
    display: inline-block;
    padding: 3px 10px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--muted-color);
    text-decoration: none;
    transition: border-color 0.2s, color 0.2s;
    margin-right: 4px;
    margin-bottom: 4px;
}

.tag-chip:hover {
    border-color: var(--link-color);
    color: var(--link-color);
    text-decoration: none;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 12px; /* spacing below the post meta line (was inline in post.html) */
}

/* Tag browser on the blog index */
.tag-index {
    margin: 0 0 36px;
}

.back-link {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}
.see-more {
    font-size: 0.9rem;
    padding-top: 20px;
}

/* =========================================
   7. Footer
   ========================================= */
footer {
    margin-top: 100px;
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    color: var(--meta-color);
    font-size: 0.9rem;
    text-align: center;
    padding-bottom: 40px;
}

/* =========================================
   8. Code Blocks
   ========================================= */
/* Code block base */
.entry pre {
  position: relative;                 /* anchor for ::before label */
  background: var(--code-bg);
  color: var(--text-color);
  padding: 2.5rem 20px 15px;          /* top padding for language label */
  border-radius: 6px;
  overflow-x: auto;
  border: 1px solid var(--code-border);
  margin: 0 0 1.5em;
}

/* Language label */
.entry pre::before {
  content: attr(data-lang);
  position: absolute;
  top: 0.6rem;
  left: 1rem;
  font-size: 0.75rem;
  opacity: 0.7;
  line-height: 1;
  pointer-events: none;
}

/* Avoid extra inner spacing if highlighter injects */
.entry pre code {
  font-family: var(--mono-font);
  font-size: 16px; /* match kyomind's code block size */
  background: transparent;
  padding: 0;
  border: 0;
}

/* Inline code */
.entry p code,
.entry li code {
  background-color: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--code-border);
  font-family: var(--mono-font);
  font-size: 0.85em; /* match kyomind's inline code size */
}

/* If you enabled codehilite (optional but common) */
.entry .codehilite pre {
  margin: 0 0 1.5em; /* prevent codehilite wrapper from adding extra spacing */
}

/* =========================================
   9. Dashboard (Life / minimal style)
   ========================================= */

/* Section heading — uses the same h2 underline as blog, but smaller weight */
.dashboard-section {
    margin-top: 50px;
}

.dashboard-section-title {
    font-size: 1.15rem;
    color: var(--muted-color);
    font-weight: 400;
    letter-spacing: 0.01em;
    margin-bottom: 20px;
}

/* KPI grid — 4 cols default, .cols-3 for 6-cell layouts (e.g. Tesla) */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}

.kpi-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.kpi-card {
    background: var(--subtle-bg);
    border: 1px solid var(--border-color);
    padding: 16px 18px;
    border-radius: 3px;
}

.kpi-card-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.kpi-card-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--heading-color);
    line-height: 1.15;
    margin-bottom: 6px;
}

.kpi-card-meta {
    font-size: 12px;
    color: var(--meta-color);
}

/* Meta info line under the KPI grid */
.dashboard-meta {
    font-size: 13px;
    color: var(--meta-color);
    font-style: italic;
    margin-top: 6px;
    margin-bottom: 30px;
}

.dashboard-meta a {
    color: var(--link-color);
    font-style: normal;
}

/* Minimal table — only horizontal dividers, no full grid */
.dashboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.dashboard-table th {
    text-align: left;
    font-size: 11px;
    font-weight: 500;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 14px 12px;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
}

.dashboard-table td {
    padding: 16px 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    vertical-align: middle;
}

.dashboard-table tr:last-child td {
    border-bottom: none;
}

.dashboard-table td.col-amount,
.dashboard-table th.col-amount {
    text-align: right;
    font-family: var(--mono-font);
}

.dashboard-table td.col-date {
    color: var(--meta-color);
    font-family: var(--mono-font);
    font-size: 13px;
    white-space: nowrap;
}

/* Chart slot — keeps minimal aesthetic, no card chrome */
.dashboard-chart {
    position: relative;
    height: 280px;
    margin-top: 12px;
}

/* Exercise picker (progression chart) */
.dashboard-select {
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text-color);
    background: var(--subtle-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 6px 10px;
}

/* Responsive */
@media (max-width: 720px) {
    .kpi-grid,
    .kpi-grid.cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .dashboard-table {
        font-size: 0.85rem;
    }
    .dashboard-table th,
    .dashboard-table td {
        padding: 12px 8px;
    }
}

@media (max-width: 480px) {
    .kpi-card-value {
        font-size: 1.5rem;
    }
}

/* =========================================
   10. Dashboard Error States
   ========================================= */

.dashboard-error {
    color: #c0392b;
    font-size: 0.9rem;
    padding: 8px 0;
    font-style: normal;
}

.kpi-card.error {
    background: #fdf2f2;
    border-color: #fecaca;
}

.kpi-card-value.error {
    font-size: 1rem;
    font-weight: 500;
    color: #c0392b;
}

/* =========================================
   11. Error Pages (404 / 500)
   ========================================= */

.error-page {
    text-align: center;
    padding: 60px 20px;
}

.error-back {
    margin-top: 20px;
}