/* Khung nội dung: theme kit có .wrap; site chủ (DevHub) thì không — .kf-wrap tự đủ bề rộng và lề. */
.kf-wrap { width: 100%; max-width: 1200px; margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); box-sizing: border-box; }
/* Cộng đồng (module forum). Màu chỉ từ biến của skin (--c-*), nền nhạt pha 7–12% như theme. Mọi animation có nhánh
   prefers-reduced-motion ở cuối tệp. */
.kf-band { position: relative; overflow: hidden; color: var(--c-on-primary); background: linear-gradient(120deg, color-mix(in srgb, var(--c-primary) 62%, var(--c-text)) 0%, var(--c-primary) 62%, color-mix(in srgb, var(--c-primary) 82%, var(--c-text)) 100%); }
.kf-band::after { content: ""; position: absolute; right: -80px; top: -100px; width: 320px; height: 320px; border-radius: 50%; pointer-events: none; background: radial-gradient(circle, color-mix(in srgb, var(--c-accent) 45%, transparent), transparent 70%); }
.kf-band .wrap { position: relative; z-index: 1; display: grid; gap: 12px; padding-block: 26px 24px; }
.kf-band h1 { margin: 0; color: var(--c-on-primary); font-size: clamp(26px, 4vw, 38px); }
.kf-ask { display: grid; gap: 8px; }
.kf-mode { display: inline-flex; width: max-content; gap: 2px; padding: 3px; border-radius: 999px; background: color-mix(in srgb, var(--c-on-primary) 18%, transparent); }
.kf-mode[hidden] { display: none; }
.kf-mode button { padding: 5px 13px; border: 0; border-radius: 999px; background: transparent; color: var(--c-on-primary); font: inherit; font-size: 13.5px; font-weight: 700; cursor: pointer; }
.kf-mode button[aria-pressed="true"] { background: var(--c-bg); color: var(--c-text); }
.kf-box { display: flex; align-items: center; gap: 10px; min-height: 52px; padding: 6px 6px 6px 18px; border-radius: 999px; background: var(--c-bg); }
.kf-box input { flex: 1; min-width: 0; height: 38px; border: 0; outline: 0; background: transparent; color: var(--c-text); font: inherit; font-size: 16px; }
.kf-found { min-height: 1.6em; margin: 0; font-size: 14px; }
.kf-found a { margin-left: 6px; color: var(--c-on-primary); font-weight: 700; }
.kf-stats { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; font-size: 14px; }
.kf-stats b { font-size: 17px; }
.kf-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 0 18px; border: 1px solid transparent; border-radius: 999px; background: var(--c-primary); color: var(--c-on-primary); font: inherit; font-weight: 700; text-decoration: none; cursor: pointer; white-space: nowrap; }
.kf-btn[hidden] { display: none; }
.kf-btn--ghost { border-color: var(--c-border); background: var(--c-bg); color: var(--c-text); }
.kf-btn--block { width: 100%; }
.kf-btn[disabled] { opacity: .5; cursor: not-allowed; }
.kf-grid, .kf-thread { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; padding-block: 22px 40px; }
@media (max-width: 900px) { .kf-grid, .kf-thread { grid-template-columns: minmax(0, 1fr); } }
.kf-main { min-width: 0; }
.kf-chips { display: flex; gap: 8px; margin-bottom: 12px; padding-bottom: 4px; overflow-x: auto; }
.kf-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 13px; border: 1px solid var(--c-border); border-radius: 999px; background: var(--c-bg); color: var(--c-text); font: inherit; font-size: 14px; font-weight: 600; text-decoration: none; white-space: nowrap; cursor: pointer; }
.kf-chip[hidden] { display: none; }
.kf-chip small { color: var(--c-muted); font-weight: 500; }
.kf-chip i { width: 9px; height: 9px; border-radius: 50%; background: var(--kfc, var(--c-primary)); }
.kf-c1 { --kfc: var(--c-group-1, var(--c-accent)); } .kf-c2 { --kfc: var(--c-group-5, var(--c-danger, var(--c-accent))); } .kf-c3 { --kfc: var(--c-group-2, var(--c-primary)); } .kf-c4 { --kfc: var(--c-group-4, var(--c-primary)); } .kf-c5 { --kfc: var(--c-group-6, var(--c-accent)); } .kf-c6 { --kfc: var(--c-group-3, var(--c-muted)); }
.kf-chip[aria-current="page"], .kf-chip[aria-pressed="true"] { border-color: var(--c-primary); background: var(--c-primary); color: var(--c-on-primary); }
.kf-chip[aria-current="page"] small, .kf-chip[aria-pressed="true"] small { color: inherit; }
.kf-chip--more { border-style: dashed; color: var(--c-primary); }
.kf-tabs { display: flex; gap: 4px; margin-bottom: 4px; overflow-x: auto; border-bottom: 1px solid var(--c-border); }
.kf-tabs a { padding: 10px 12px; border-bottom: 3px solid transparent; color: var(--c-muted); font-weight: 700; text-decoration: none; white-space: nowrap; }
.kf-tabs a[aria-current="page"] { border-bottom-color: var(--c-primary); color: var(--c-primary); }
.kf-list { margin: 0; padding: 0; list-style: none; }
.kf-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 12px; padding: 14px 4px; border-bottom: 1px solid var(--c-border); }
.kf-row__t { color: var(--c-text); font-size: 16.5px; font-weight: 700; line-height: 1.4; text-decoration: none; }
.kf-row__t:hover { color: var(--c-primary); }
.kf-row__ex { display: -webkit-box; margin: 2px 0 0; overflow: hidden; color: var(--c-muted); font-size: 14px; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.kf-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; margin: 6px 0 0; color: var(--c-muted); font-size: 12.5px; }
.kf-badge { padding: 1px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 700; }
.kf-badge--ask, .kf-badge--ok { background: color-mix(in srgb, var(--c-primary) 9%, var(--c-bg)); color: var(--c-primary); }
.kf-badge--share { background: color-mix(in srgb, var(--c-accent) 9%, var(--c-bg)); color: var(--c-accent); }
.kf-tag { padding: 1px 9px; border-radius: 999px; background: var(--c-surface); color: var(--c-text); font-size: 12px; font-weight: 700; }
.kf-av { display: grid; place-items: center; width: 34px; height: 34px; flex: none; border-radius: 50%; background: color-mix(in srgb, var(--c-primary) 12%, var(--c-bg)); color: var(--c-primary); font-size: 14px; font-weight: 700; }
.kf-cnt { display: grid; align-content: center; place-items: center; min-width: 58px; padding: 6px 8px; border-radius: 12px; background: var(--c-surface); text-align: center; }
.kf-cnt b { font-size: 18px; line-height: 1.1; } .kf-cnt small { color: var(--c-muted); font-size: 11.5px; }
.kf-cnt.is-zero { background: color-mix(in srgb, var(--c-accent) 8%, var(--c-bg)); } .kf-cnt.is-zero b { color: var(--c-accent); }
.kf-empty { padding: 16px 4px; color: var(--c-muted); }
.kf-side { display: grid; gap: 14px; min-width: 0; }
.kf-card { display: grid; gap: 8px; padding: 16px; border: 1px solid var(--c-border); border-radius: calc(var(--radius) * 1.4); background: var(--c-bg); }
.kf-card h2 { margin: 0; font-size: 16px; }
.kf-card ul { display: grid; gap: 6px; margin: 0; padding-left: 18px; font-size: 14px; }
.kf-libcard { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--c-border); border-radius: 12px; color: var(--c-text); text-decoration: none; }
.kf-libcard:hover { border-color: var(--c-primary); }
/* Khung mời viết: viền chuyển màu chậm, biểu tượng trôi nhẹ, nút phát sáng. */
.kf-lure { padding: 2px; border-radius: 18px; background: linear-gradient(120deg, var(--c-primary), var(--c-group-4, var(--c-accent)), var(--c-accent), var(--c-primary)); background-size: 300% 300%; box-shadow: 0 10px 30px color-mix(in srgb, var(--c-primary) 22%, transparent); animation: kf-border 8s ease infinite; }
.kf-lure__in { position: relative; overflow: hidden; padding: 18px 16px 16px; border-radius: 16px; background: linear-gradient(160deg, color-mix(in srgb, var(--c-primary) 9%, var(--c-bg)), var(--c-bg) 60%); }
.kf-lure__k { margin: 0 0 4px; padding-right: 56px; color: var(--c-accent); font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.kf-lure h2 { margin: 0 0 10px; padding-right: 34px; font-size: 19px; line-height: 1.3; }
.kf-lure ul { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; font-size: 14px; }
.kf-lure li { position: relative; padding-left: 24px; }
.kf-lure li::before { content: "✓"; position: absolute; left: 0; top: 2px; display: grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: var(--c-primary); color: var(--c-on-primary); font-size: 11px; font-weight: 700; }
.kf-lure__float { position: absolute; right: 14px; top: 12px; font-size: 26px; animation: kf-float 4s ease-in-out infinite; }
.kf-lure__float--2 { right: 44px; top: 34px; font-size: 18px; opacity: .85; animation-delay: -2s; }
.kf-lure__wait { display: flex; align-items: center; gap: 8px; margin: 14px 0 0; padding: 8px 12px; border-radius: 12px; background: color-mix(in srgb, var(--c-accent) 8%, var(--c-bg)); font-size: 14px; }
.kf-lure__wait b { color: var(--c-accent); font-size: 17px; }
.kf-lure__dot { width: 9px; height: 9px; flex: none; border-radius: 50%; background: var(--c-accent); animation: kf-ping 1.8s ease-out infinite; }
.kf-lure__cta { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.kf-glow { animation: kf-glow 2.6s ease-in-out infinite; }
@keyframes kf-border { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
@keyframes kf-float { 0%, 100% { transform: translateY(0) rotate(-6deg); } 50% { transform: translateY(-6px) rotate(6deg); } }
@keyframes kf-ping { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--c-accent) 55%, transparent); } 80%, 100% { box-shadow: 0 0 0 10px transparent; } }
@keyframes kf-glow { 0%, 100% { box-shadow: 0 4px 14px color-mix(in srgb, var(--c-primary) 28%, transparent); } 50% { box-shadow: 0 6px 26px color-mix(in srgb, var(--c-primary) 55%, transparent); } }
/* Một bài */
.kf-crumb { margin: 0 0 10px; color: var(--c-muted); font-size: 14px; } .kf-crumb a { color: var(--c-muted); }
.kf-q, .kf-a { padding: 16px 18px; border: 1px solid var(--c-border); border-radius: calc(var(--radius) * 1.4); background: var(--c-bg); }
.kf-q h1 { margin: 8px 0 10px; font-size: clamp(22px, 3vw, 28px); }
.kf-by { display: flex; align-items: center; gap: 10px; margin: 0; font-size: 14px; } .kf-by small { display: block; color: var(--c-muted); }
.kf-official { padding: 0 6px; border-radius: 6px; background: var(--c-primary); color: var(--c-on-primary); font-size: 11px; font-weight: 700; }
.kf-op { padding: 0 6px; border-radius: 6px; background: color-mix(in srgb, var(--c-accent) 10%, var(--c-bg)); color: var(--c-accent); font-size: 11px; font-weight: 700; }
.kf-body { margin-top: 12px; font-size: 16.5px; line-height: 1.7; overflow-wrap: anywhere; }
.kf-body p { margin: 0 0 .8em; }
.kf-pic { display: block; width: 100%; max-width: 440px; height: auto; margin-top: 12px; border-radius: 12px; }
.kf-acts { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 14px 0 0; }
.kf-help { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border: 1px solid var(--c-border); border-radius: 999px; background: var(--c-bg); color: var(--c-text); font: inherit; font-size: 14px; font-weight: 600; cursor: pointer; }
.kf-help[aria-pressed="true"] { border-color: var(--c-primary); background: color-mix(in srgb, var(--c-primary) 9%, var(--c-bg)); color: var(--c-primary); }
.kf-link { padding: 0; border: 0; background: none; color: var(--c-muted); font: inherit; font-size: 13.5px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.kf-link[hidden] { display: none; }
.kf-note { margin: 14px 0 0; padding: 8px 12px; border-radius: 10px; background: var(--c-surface); color: var(--c-muted); font-size: 13px; }
.kf-ans-h { margin: 22px 0 8px; font-size: 19px; }
.kf-ans { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.kf-a.is-best { border-color: var(--c-primary); background: color-mix(in srgb, var(--c-primary) 5%, var(--c-bg)); }
.kf-bestlab { margin: 0 0 6px; color: var(--c-primary); font-size: 12.5px; font-weight: 700; }
.kf-reply { margin-top: 16px; padding: 16px; border: 1px solid var(--c-border); border-radius: calc(var(--radius) * 1.4); background: var(--c-surface); }
.kf-reply h2 { margin: 0 0 8px; font-size: 16px; }
.kf-gate { display: grid; gap: 10px; justify-items: start; }
.kf-gate[hidden], .kf-form[hidden] { display: none; }
.kf-gate p { margin: 0; color: var(--c-muted); }
/* Form */
.kf-form { display: grid; gap: 12px; }
.kf-form textarea, .kf-form input[type="text"], .kf-sheet input, .kf-safe input { width: 100%; min-width: 0; padding: 11px 13px; border: 1px solid var(--c-border); border-radius: 12px; background: var(--c-bg); color: var(--c-text); font: inherit; font-size: 16px; }
.kf-form textarea { resize: vertical; line-height: 1.6; }
.kf-field { display: grid; gap: 6px; }
.kf-label { font-size: 14px; font-weight: 700; }
.kf-hint { margin: 0; color: var(--c-muted); font-size: 12.5px; }
.kf-hint.is-bad { color: var(--c-danger, var(--c-accent)); }
.kf-warn { margin: 0; padding: 8px 12px; border-radius: 10px; background: color-mix(in srgb, var(--c-danger, var(--c-accent)) 9%, var(--c-bg)); color: var(--c-danger, var(--c-accent)); font-size: 13.5px; }
.kf-warn[hidden] { display: none; }
.kf-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin: 0; }
.kf-drop { display: flex; align-items: center; gap: 12px; padding: 12px; border: 2px dashed var(--c-border); border-radius: 12px; background: var(--c-bg); color: var(--c-muted); font-size: 14px; cursor: pointer; }
.kf-drop[hidden], .kf-prev[hidden] { display: none; }
.kf-drop:hover { border-color: var(--c-primary); }
.kf-drop b { display: block; color: var(--c-text); } .kf-drop small { display: block; }
.kf-drop__ic { display: grid; place-items: center; width: 42px; height: 42px; flex: none; border-radius: 12px; background: var(--c-surface); font-size: 20px; }
.kf-prev { position: relative; width: max-content; max-width: 100%; }
.kf-prev img { display: block; width: 220px; max-width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 12px; }
.kf-prev button { position: absolute; top: 6px; right: 6px; padding: 3px 10px; border: 0; border-radius: 999px; background: var(--c-text); color: var(--c-bg); font: inherit; font-size: 12.5px; cursor: pointer; }
.kf-composer { max-width: 760px; padding-block: 22px 40px; }
.kf-composer h1 { margin: 0 0 6px; font-size: clamp(24px, 3.4vw, 32px); }
.kf-lead { margin: 0 0 16px; color: var(--c-muted); }
.kf-kind { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.kf-kind button { display: grid; gap: 2px; padding: 12px 14px; border: 2px solid var(--c-border); border-radius: 14px; background: var(--c-bg); color: var(--c-text); font: inherit; text-align: left; cursor: pointer; }
.kf-kind button small { color: var(--c-muted); font-size: 13px; }
.kf-kind button[aria-pressed="true"] { border-color: var(--c-primary); background: color-mix(in srgb, var(--c-primary) 7%, var(--c-bg)); }
.kf-picks { display: flex; flex-wrap: wrap; gap: 8px; }
.kf-sheet { display: grid; gap: 12px; max-height: 420px; padding: 12px; overflow: auto; border: 1px solid var(--c-border); border-radius: 14px; background: var(--c-surface); }
.kf-sheet[hidden], .kf-tg[hidden] { display: none; }
.kf-tg { display: grid; gap: 6px; } .kf-tg b { font-size: 14px; } .kf-tg small { color: var(--c-muted); font-weight: 500; }
.kf-safe { display: grid; gap: 6px; padding: 12px 14px; border-radius: 14px; background: color-mix(in srgb, var(--c-primary) 8%, var(--c-bg)); font-size: 14px; }
.kf-safe b { color: var(--c-primary); }
.kf-safe label { display: grid; gap: 4px; max-width: 300px; margin-top: 4px; font-size: 13.5px; font-weight: 700; }
.kf-toast { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom, 0px)); z-index: 60; padding: 10px 18px; border-radius: 999px; background: var(--c-text); color: var(--c-bg); font-size: 14px; font-weight: 600; transform: translateX(-50%); }
.kf-toast[hidden] { display: none; }
@media (prefers-reduced-motion: reduce) {
  .kf-lure, .kf-lure__float, .kf-lure__dot, .kf-glow { animation: none; }
}