/* Nhận diện theo dalatnow.vn: tím #562da1, cam #C05530, Roboto cho chữ, Gelasio cho tiêu đề lớn. */
:root {
  --purple: #562da1; --purple-dark: #3f1f7a; --purple-soft: #f1ecfa; --orange: #c05530; --green: #627d47; --red: #b20000;
  --text: #0a0a0a; --muted: #6b6478; --line: #e6e1ef; --bg: #faf9fc; --card: #fff;
  --shadow: 0 6px 22px rgba(86, 45, 161, .08);
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.55 Roboto, system-ui, sans-serif; background: var(--bg); color: var(--text); }
.hidden { display: none !important; }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px; }
a { color: var(--purple); }

.btn, .btn-outline, button.btn { font: 700 13px Roboto, sans-serif; letter-spacing: .02em; border-radius: 5px; padding: 9px 18px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.btn { background: var(--purple); color: #fff; border: 2px solid var(--purple); }
.btn:hover { background: var(--purple-dark); border-color: var(--purple-dark); }
.btn-outline { background: #fff; color: var(--purple); border: 2px solid var(--purple); }
.btn-outline:hover { background: var(--purple-soft); }
button:disabled, .btn:disabled { opacity: .45; cursor: default; }
.small { padding: 5px 12px !important; font-size: 12px !important; }
.linkish { background: none; border: 0; color: var(--muted); font: 500 12px Roboto; cursor: pointer; padding: 4px 6px; }
.linkish:hover { color: var(--red); }

input, select, textarea { font: inherit; padding: 9px 12px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff; width: 100%; color: var(--text); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--purple); box-shadow: 0 0 0 3px var(--purple-soft); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 18px; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--red); min-height: 1.2em; margin: 0; }
.eyebrow { font: 700 22px Roboto; margin: 0; color: var(--text); }
.eyebrow.light, .script.light { color: #fff; }
.script { font: italic 400 22px Gelasio, serif; margin: 2px 0 0; color: var(--text); }

/* Đăng nhập: nền tím sương mù như ảnh bìa trang chủ */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px;
  background: linear-gradient(160deg, rgba(86, 45, 161, .9), rgba(140, 92, 214, .75) 55%, rgba(240, 164, 107, .8)), #562da1; }
.login-card { width: min(400px, 100%); background: #fff; border-radius: 18px; padding: 30px 28px; display: grid; gap: 12px; box-shadow: 0 20px 50px rgba(30, 10, 60, .35); text-align: center; }
.login-card h1 { font: 700 40px Gelasio, serif; color: var(--purple); margin: 0; }
.logo-big { width: 74px; margin: 0 auto 4px; }

/* Header trắng, menu chữ in hoa đậm */
.site-header { background: #fff; box-shadow: 0 2px 12px rgba(0, 0, 0, .06); position: sticky; top: 0; z-index: 3; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { height: 58px; }
.brand span { font: 700 20px Gelasio, serif; color: var(--purple); }
.main-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.tab { background: none; border: 0; border-bottom: 3px solid transparent; font: 700 14px Roboto; text-transform: uppercase; color: #0a0a0a; padding: 10px 10px 7px; cursor: pointer; text-decoration: none; }
.tab:hover { color: var(--purple); }
.tab.active { color: var(--purple); border-bottom-color: var(--purple); }
.muted-tab { color: var(--muted); }

/* Băng tiêu đề kiểu ảnh bìa trang chủ */
.hero { background: linear-gradient(115deg, rgba(63, 31, 122, .95), rgba(110, 66, 190, .85) 50%, rgba(233, 150, 105, .85)),
  radial-gradient(circle at 80% 20%, rgba(255, 255, 255, .25), transparent 40%), #562da1; color: #fff; padding: 30px 0 34px; }
.hero-row { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.hero-title { font: 700 64px/1.15 Gelasio, serif; margin: 10px 0 2px; letter-spacing: .02em; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(110px, 1fr)); gap: 12px; }
.stat { background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .3); border-radius: 14px; padding: 12px 16px; text-align: center; cursor: pointer; }
.stat:hover { background: rgba(255, 255, 255, .26); }
.stat b { display: block; font: 700 30px Roboto; }
.stat span { font-size: 13px; opacity: .95; }

main { padding-top: 26px; padding-bottom: 40px; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 26px 0 12px; flex-wrap: wrap; }
.section-head h2 { font: 700 20px Roboto; text-transform: uppercase; color: var(--purple); margin: 0; padding-bottom: 8px; border-bottom: 2px solid var(--line); position: relative; }
.section-head h2::after { content: ''; position: absolute; left: 0; bottom: -2px; width: 60%; height: 2px; background: var(--purple); }
.pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pill { background: #fff; border: 2px solid var(--purple); color: var(--purple); border-radius: 8px; padding: 5px 14px; font: 500 14px Roboto; cursor: pointer; }
.pill.active, .pill:hover { background: var(--purple); color: #fff; }

.add { display: grid; grid-template-columns: 2fr 2fr 1.3fr 1.5fr; gap: 12px; }
.add textarea { grid-column: 1 / 4; }
.add .inline { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.add .inline input { width: auto; accent-color: var(--purple); }
.add .btn { grid-column: 4; }

.table-card { padding: 0; overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; font-size: 14px; }
th { background: var(--purple-soft); color: var(--purple); font: 700 12px Roboto; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
tbody tr:hover { background: #fcfbff; }
tbody tr.dragging { opacity: .4; }
td.grip { cursor: grab; color: #b9b0c8; width: 26px; }
td.kw strong { display: block; font-weight: 700; }
td.kw .err { display: block; color: var(--orange); font-size: 12px; margin-top: 2px; }
td.actions { white-space: nowrap; text-align: right; }
td.actions > * { margin-left: 4px; }
td.score b { color: var(--purple); }

.badge { display: inline-block; padding: 3px 11px; border-radius: 999px; font: 700 12px Roboto; white-space: nowrap; }
.badge[data-s="Nháp"] { background: #ede7f8; color: #5b4a7d; }
.badge[data-s="Chờ viết"] { background: #e9e6f3; color: #3f3a52; }
.badge[data-s="Đang viết"], .badge[data-s="Đang sửa"] { background: #fff1dc; color: #a35a00; }
.badge[data-s="Chờ duyệt"] { background: #fbe3d8; color: var(--orange); }
.badge[data-s="Đã đăng"] { background: #e3edd8; color: var(--green); }
.badge[data-s="Lỗi"] { background: #f8dcdc; color: var(--red); }
select.status { width: auto; padding: 4px 8px; font-size: 13px; border-radius: 999px; }

.settings { display: grid; grid-template-columns: 1fr 170px; gap: 12px 18px; max-width: 680px; align-items: center; }
.settings .btn { grid-column: 2; }

.site-footer { background: var(--purple-dark); color: #e9e2f7; padding: 18px 0; font-size: 13px; }

/* Xem bài */
.viewer { position: fixed; inset: 0; background: rgba(30, 14, 60, .55); z-index: 5; display: flex; }
.viewer-panel { background: #fff; margin: 2vh auto; width: min(1320px, 96vw); border-radius: 16px; display: flex; flex-direction: column; overflow: hidden; box-shadow: 0 20px 60px rgba(0, 0, 0, .3); }
.viewer-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.viewer-head h2 { margin: 0; font: 700 21px Gelasio, serif; color: var(--purple); }
.viewer-body { display: grid; grid-template-columns: 350px 1fr; flex: 1; min-height: 0; }
.viewer-body aside { padding: 18px; border-right: 1px solid var(--line); overflow: auto; display: grid; gap: 12px; align-content: start; background: #fdfcff; }
.viewer-body aside h3 { margin: 8px 0 0; font: 700 14px Roboto; text-transform: uppercase; color: var(--purple); }
.viewer-body iframe { width: 100%; height: 100%; border: 0; }
.summary div { font-size: 13px; margin-bottom: 5px; }
.summary b { color: var(--muted); font-weight: 500; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.history div { font-size: 13px; border-left: 3px solid var(--purple); background: #fff; padding: 6px 10px; margin: 6px 0; border-radius: 0 6px 6px 0; }
.img-row { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; margin-bottom: 6px; word-break: break-all; }

@media (max-width: 900px) {
  .add { grid-template-columns: 1fr; }
  .add textarea, .add .btn { grid-column: auto; }
  .stats { grid-template-columns: repeat(2, 1fr); width: 100%; }
  .hero-title { font-size: 48px; }
  .viewer-body { grid-template-columns: 1fr; }
  .viewer-body iframe { min-height: 70vh; }
  .table-card { overflow-x: auto; }
}

/* Điểm SEO kiểu Rank Math */
.score-box { display: flex; gap: 14px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.score-box b { font: 700 15px Roboto; }
.score-box p { margin: 2px 0 0; }
.score-ring { --c: var(--purple); flex: none; width: 74px; height: 74px; border-radius: 50%; display: grid; place-items: center; align-content: center;
  background: radial-gradient(closest-side, #fff 78%, transparent 80%), conic-gradient(var(--c) calc(var(--p) * 1%), #ece8f3 0); }
.score-ring span { font: 700 24px/1 Roboto; color: var(--c); }
.score-ring small { font-size: 11px; color: var(--muted); }
.score-box.good .score-ring { --c: #3c8a2e; }
.score-box.ok .score-ring { --c: #e08a00; }
.score-box.bad .score-ring { --c: var(--red); }
.checks { margin: 8px 0; }
.checks h4, .checks summary { font: 700 13px Roboto; text-transform: uppercase; color: var(--purple); margin: 10px 0 6px; cursor: pointer; }
.check { display: flex; gap: 8px; font-size: 13px; padding: 5px 0; border-bottom: 1px dashed var(--line); }
.check > span { flex: none; width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; font: 700 11px Roboto; color: #fff; margin-top: 1px; }
.check.bad > span { background: var(--red); }
.check.warn > span { background: #e08a00; }
.check.ok > span { background: #3c8a2e; }
.check small { display: block; color: var(--muted); font-size: 12px; }

/* Thông báo góc dưới */
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 9; max-width: 420px; background: var(--purple-dark); color: #fff; padding: 14px 18px; border-radius: 12px; box-shadow: 0 12px 30px rgba(30, 10, 60, .35); font-size: 14px; }

#v-feedback { min-height: 96px; resize: vertical; }
.usage-bar { display: flex; flex-wrap: wrap; gap: 8px 24px; margin: 18px 0 0; padding: 10px 16px; background: #f4effc; color: #3b2370; border-radius: 10px; font-size: 14px; cursor: pointer; }
.usage-bar.low { background: #fdecea; color: #a12a1b; }
#openrouter-usage p { margin: 4px 0; }