/*
Theme Name: SavingsHacks
Description: Theme tối giản tự viết cho savingshacks.org. Không jQuery, không webfont ngoài, một file CSS duy nhất. Ưu tiên tốc độ đọc và độ ổn định layout.
Author: SavingsHacks
Version: 1.0
Requires at least: 6.0
Tested up to: 7.0
Requires PHP: 8.0
License: GPLv2 or later
Text Domain: savingshacks
*/

/* ── Tokens ────────────────────────────────────────────────────────────── */
:root {
  --ink:        #16211d;
  --ink-soft:   #46554e;
  --muted:      #6d7c75;
  --line:       #dfe5e2;
  --line-soft:  #edf1ef;
  --bg:         #ffffff;
  --bg-alt:     #f6f8f7;
  --accent:     #0f6e57;
  --accent-dk:  #0b5544;
  --focus:      #0f6e57;
  --max:        44rem;   /* ~65 ky tu moi dong */
  --wide:       68rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:       #e6ece9;
    --ink-soft:  #b3c0ba;
    --muted:     #8a9992;
    --line:      #2b3733;
    --line-soft: #222c29;
    --bg:        #121815;
    --bg-alt:    #182020;
    --accent:    #56c3a5;
    --accent-dk: #7ad4ba;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Bo cuc ────────────────────────────────────────────────────────────── */
.wrap { width: 100%; max-width: var(--wide); margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: var(--max); }

/* ── Bo qua den noi dung (a11y) ────────────────────────────────────────── */
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: .6rem 1rem; z-index: 100;
}
.skip:focus { left: 0; }

/* ── Header ────────────────────────────────────────────────────────────── */
.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.brand { display: flex; flex-direction: column; gap: .1rem; text-decoration: none; }
.brand b {
  font-size: 1.3rem; font-weight: 700; letter-spacing: -.02em; color: var(--ink);
}
.brand span { font-size: .8rem; color: var(--muted); }

.nav ul {
  list-style: none; display: flex; flex-wrap: wrap; gap: 1.15rem; margin: 0; padding: 0;
}
.nav a {
  text-decoration: none; color: var(--ink-soft); font-size: .94rem; font-weight: 500;
}
.nav a:hover, .nav a:focus { color: var(--accent); }

/* ── Lien ket ──────────────────────────────────────────────────────────── */
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-dk); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* ── Chu ────────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.22; letter-spacing: -.015em; text-wrap: balance; margin: 0 0 .6rem; }
h1 { font-size: clamp(1.75rem, 4vw, 2.4rem); }
h2 { font-size: 1.45rem; margin-top: 2.2rem; }
h3 { font-size: 1.15rem; margin-top: 1.6rem; }
p, ul, ol, blockquote, table, figure { margin: 0 0 1.15rem; }
ul, ol { padding-left: 1.35rem; }
li { margin-bottom: .35rem; }
li::marker { color: var(--accent); }

blockquote {
  border-left: 3px solid var(--accent);
  margin-left: 0; padding: .2rem 0 .2rem 1rem; color: var(--ink-soft);
}

/* ── Anh: luon co khung, khong vo layout ───────────────────────────────── */
img { max-width: 100%; height: auto; display: block; }
figure { margin-inline: 0; }
figcaption { font-size: .84rem; color: var(--muted); margin-top: .4rem; }

/* ── Bang ──────────────────────────────────────────────────────────────── */
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
th { border-bottom-color: var(--line); font-weight: 650; }

/* ── Danh sach bai ─────────────────────────────────────────────────────── */
.page-title { margin: 2.4rem 0 .3rem; }
.page-sub { color: var(--muted); margin-bottom: 2rem; }

.list { display: grid; gap: 1.6rem; margin: 2rem 0 3rem; list-style: none; padding: 0; }
@media (min-width: 46rem) { .list { grid-template-columns: repeat(2, 1fr); gap: 2rem; } }

.card { display: flex; flex-direction: column; gap: .55rem; }
.card-thumb img { border-radius: 3px; aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.card h2 { font-size: 1.12rem; margin: 0; }
.card h2 a { color: var(--ink); text-decoration: none; }
.card h2 a:hover { color: var(--accent); text-decoration: underline; }
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

.meta { font-size: .82rem; color: var(--muted); display: flex; gap: .6rem; flex-wrap: wrap; }
.meta a { color: var(--muted); }

/* ── Bai don ───────────────────────────────────────────────────────────── */
.entry { margin: 2.4rem 0 3rem; }
.entry-head { margin-bottom: 1.6rem; }
.entry-head h1 { margin-bottom: .5rem; }
.entry-thumb { margin: 0 0 1.8rem; }
.entry-thumb img { border-radius: 3px; }
.entry-content > *:first-child { margin-top: 0; }

.verified {
  background: var(--bg-alt); border: 1px solid var(--line);
  padding: .7rem .95rem; font-size: .88rem; color: var(--ink-soft);
  border-radius: 3px; margin-bottom: 1.6rem;
}

.tags { margin: 2.2rem 0 0; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.tags a {
  display: inline-block; font-size: .85rem; text-decoration: none;
  border: 1px solid var(--line); padding: .22rem .6rem; border-radius: 3px;
  margin: 0 .3rem .45rem 0; color: var(--ink-soft);
}
.tags a:hover { border-color: var(--accent); color: var(--accent); }

/* ── Breadcrumb ────────────────────────────────────────────────────────── */
.crumbs {
  font-size: .84rem; color: var(--muted);
  margin: 2rem 0 .8rem; overflow-x: auto; white-space: nowrap;
}
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); text-decoration: underline; }

/* ── Trang chu: hero + hub theo chuoi ─────────────────────────────────── */
.hero { margin: 3rem 0 2.6rem; max-width: var(--max); }
.hero h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); margin-bottom: .5rem; }
.hero p { color: var(--ink-soft); font-size: 1.1rem; margin-bottom: 1.6rem; }

.hub { margin: 0 0 3rem; }
.hub h2 { margin-top: 0; }
.hub-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: .7rem;
  grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
}
.hub-grid a {
  display: flex; flex-direction: column; gap: .12rem;
  border: 1px solid var(--line); border-radius: 3px;
  padding: .7rem .85rem; text-decoration: none; background: var(--bg);
}
.hub-grid a:hover { border-color: var(--accent); }
.hub-grid b { color: var(--ink); font-size: .96rem; }
.hub-grid span { color: var(--muted); font-size: .8rem; }

/* ── FAQ ───────────────────────────────────────────────────────────────── */
.faq { margin: 2.6rem 0 0; }
.faq dl { margin: 0; }
.faq dt {
  font-weight: 650; margin-top: 1.25rem; padding-top: 1.25rem;
  border-top: 1px solid var(--line-soft);
}
.faq dt:first-of-type { border-top: 0; padding-top: 0; margin-top: .8rem; }
.faq dd { margin: .4rem 0 0; color: var(--ink-soft); }

/* ── Bai lien quan ─────────────────────────────────────────────────────── */
.related { margin: 2.6rem 0 0; }
.related h2, .faq h2 { font-size: 1.15rem; margin-bottom: .7rem; }
.related ul { margin: 0; padding-left: 1.2rem; }

/* ── Internal link trong bai: cho thay ro day la link noi bo ──────────── */
.entry-content a[href*="savingshacks.org"],
.entry-content a:not([href^="http"]) {
  text-decoration-color: var(--accent);
}

/* ── Phan trang ────────────────────────────────────────────────────────── */
.pagination { display: flex; gap: .4rem; flex-wrap: wrap; margin: 0 0 3rem; }
.pagination .page-numbers {
  padding: .4rem .75rem; border: 1px solid var(--line); border-radius: 3px;
  text-decoration: none; font-size: .9rem;
}
.pagination .current { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Tim kiem ──────────────────────────────────────────────────────────── */
.searchform { display: flex; gap: .5rem; margin: 0 0 2rem; }
.searchform input[type="search"] {
  flex: 1; padding: .55rem .7rem; border: 1px solid var(--line); border-radius: 3px;
  background: var(--bg); color: var(--ink); font: inherit; font-size: .95rem;
}
.searchform button {
  padding: .55rem 1rem; border: 0; border-radius: 3px; background: var(--accent);
  color: #fff; font: inherit; font-size: .95rem; cursor: pointer;
}
.searchform button:hover { background: var(--accent-dk); }

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-foot {
  border-top: 1px solid var(--line); margin-top: 3rem;
  padding: 2rem 0; font-size: .88rem; color: var(--muted);
}
.site-foot .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-foot a { color: var(--muted); }

/* ── Giam chuyen dong ──────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}