/* styles/studio.css — Giao diện Studio (thiết kế lại). */

:root, .app {
  --bg: #0d0f12;
  --panel: #14181d;
  --panel-2: #1a1f26;
  --card: #1b212a;
  --elev: #222a34;
  --line: #262d36;
  --line-2: #333c47;
  --txt: #e7ecf2;
  --txt-2: #a9b4c0;
  --muted: #ecf5ff;
  --accent: #5cc8ff;
  --accent-2: #ffb454;
  --accent-soft: rgba(92, 200, 255, .14);
  --accent2-soft: rgba(255, 180, 84, .14);
  --ok: #57d19a;
  --warn: #ffc857;
  --err: #ff6b6b;
  --ok-soft: rgba(87, 209, 154, .15);
  --warn-soft: rgba(255, 200, 87, .15);
  --err-soft: rgba(255, 107, 107, .15);
  --r: 10px;
  --r-sm: 7px;
  --r-lg: 16px;
  --shadow: 0 12px 32px rgba(0, 0, 0, .45);
  --font: "Inter", "Segoe UI", Roboto, "Noto Sans", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
}
.app[data-ui-theme="light"] {
  --bg: #eef1f5; --panel: #ffffff; --panel-2: #f4f6f9; --card: #ffffff; --elev: #eef1f5;
  --line: #dde3ea; --line-2: #c8d1db; --txt: #feffff; --txt-2: #f4f6f8; --muted: #6b7683;
  --accent: #0f8fd6; --accent-2: #c9770a; --accent-soft: rgba(15,143,214,.12); --accent2-soft: rgba(201,119,10,.12);
  --shadow: 0 12px 32px rgba(20,30,45,.16);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--txt); font-family: var(--font); font-size: 13.5px; line-height: 1.45; -webkit-font-smoothing: antialiased; overflow: hidden; }
h1, h2, h3, h4 { margin: 0 0 .5em; color: var(--txt); font-weight: 650; line-height: 1.25; }
p { margin: 0 0 .6em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .85em; background: var(--elev); padding: .1em .35em; border-radius: 5px; }
::selection { background: var(--accent-soft); }
* { scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 6px; border: 2px solid transparent; background-clip: content-box; }

/* Nút */
.btn, button.btn {
  font: inherit; font-size: .84rem; color: var(--txt); background: var(--elev); border: 1px solid var(--line-2);
  border-radius: var(--r-sm); padding: .42em .75em; cursor: pointer; display: inline-flex; align-items: center; gap: .4em;
  transition: background .12s, border-color .12s, transform .05s; white-space: nowrap;
}
.btn:hover { background: var(--card); border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #04141d; font-weight: 650; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-sm { padding: .3em .6em; font-size: .78rem; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--txt-2); }
.btn-ghost:hover { background: var(--elev); border-color: var(--line); color: var(--txt); }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: var(--r-sm); background: transparent; border: 1px solid transparent; color: var(--txt-2); cursor: pointer; }
.icon-btn:hover { background: var(--elev); border-color: var(--line); color: var(--txt); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

input[type="text"], input[type="search"], select {
  font: inherit; font-size: .85rem; color: var(--txt); background: var(--bg); border: 1px solid var(--line-2);
  border-radius: var(--r-sm); padding: .4em .55em; width: 100%;
}
input[type="range"] { width: 100%; accent-color: var(--accent); height: 22px; cursor: pointer; }
input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }

.tag { display: inline-flex; align-items: center; font-size: .68rem; font-weight: 650; text-transform: uppercase; letter-spacing: .04em; padding: .15em .5em; border-radius: 999px; background: var(--elev); color: var(--txt-2); border: 1px solid var(--line); }
.badge { display: inline-flex; align-items: center; font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; padding: .16em .5em; border-radius: 999px; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.chip { background: var(--elev); border: 1px solid var(--line); border-radius: 999px; padding: .22em .75em; font-size: .76rem; color: var(--txt-2); }
.chip.accent { background: var(--accent-soft); border-color: transparent; color: var(--accent); }
.muted { color: var(--muted); } .small { font-size: .8rem; }

/* Bố cục */
.app {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 344px;
  grid-template-rows: 52px minmax(0, 1fr) 30px;
  grid-template-areas: "appbar appbar appbar" "rail center dock" "status status status";
  height: 100dvh; overflow: hidden;
}
.app.dock-collapsed { grid-template-columns: 64px minmax(0, 1fr) 0px; }
.app.dock-collapsed .dock { display: none; }

/* App bar */
#appbar { grid-area: appbar; display: flex; align-items: center; gap: .5rem; padding: 0 .8rem; background: var(--panel); border-bottom: 1px solid var(--line); z-index: 20; }
.brand { display: flex; align-items: center; gap: .6rem; padding-right: .8rem; border-right: 1px solid var(--line); }
.brand-mark { display: inline-flex; }
.brand-text b { display: block; font-size: .88rem; }
.brand-text span { display: block; font-size: .64rem; color: var(--muted); letter-spacing: .04em; }
.grow { flex: 1 1 auto; }
.pill { display: inline-flex; align-items: center; gap: .4em; font-size: .72rem; color: var(--txt-2); background: var(--bg); border: 1px solid var(--line); padding: .25em .6em; border-radius: 999px; }
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.pill.online .dot { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.pill.offline .dot { background: var(--warn); box-shadow: 0 0 8px var(--warn); }

/* Rail */
#rail { grid-area: rail; background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; align-items: center; gap: .3rem; padding: .6rem 0; overflow-y: auto; }
.rail-btn { position: relative; width: 44px; height: 44px; border-radius: var(--r); border: 1px solid transparent; background: transparent; color: var(--txt-2); display: inline-flex; align-items: center; justify-content: center; cursor: pointer; }
.rail-btn:hover { background: var(--elev); color: var(--txt); }
.rail-btn.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.rail-sep { width: 26px; height: 1px; background: var(--line); margin: .3rem 0; }
.rail-tip { position: absolute; left: 54px; top: 50%; transform: translateY(-50%); background: var(--elev); color: var(--txt); border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: .3em .6em; font-size: .78rem; white-space: nowrap; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .1s; z-index: 60; }
.rail-btn:hover .rail-tip { opacity: 1; }

/* Center */
#center { grid-area: center; display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
#modulebar { height: 46px; flex: none; display: flex; align-items: center; gap: .5rem; padding: 0 .8rem; background: var(--panel); border-bottom: 1px solid var(--line); }
.mb-title { font-weight: 650; }
.mb-status { font-size: .78rem; color: var(--muted); }
.mb-empty { color: var(--muted); font-size: .85rem; }
#stage { flex: 1 1 auto; min-height: 0; position: relative; overflow: auto; }
.stage-loading, .stage-error { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: .6rem; color: var(--muted); }
.stage-error { flex-direction: column; text-align: center; padding: 2rem; }
.spinner { width: 18px; height: 18px; border: 2px solid var(--line-2); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.demo-root { width: 100%; min-height: 100%; }

/* Module riêng: iframe chứa index.html của thư mục module */
.custom-frame { display: block; width: 100%; height: 100%; border: 0; background: var(--bg); }
.custom-tag { background: var(--accent2-soft); color: var(--accent-2); border-color: transparent; }

/* Dock */
#dock { grid-area: dock; background: var(--panel); border-left: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.dock-tabs { display: flex; gap: .2rem; padding: .5rem .5rem 0; border-bottom: 1px solid var(--line); }
.dock-tab { flex: 1; background: transparent; border: 0; border-bottom: 2px solid transparent; color: var(--txt-2); padding: .5em .3em; font-size: .8rem; cursor: pointer; }
.dock-tab:hover { color: var(--txt); }
.dock-tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.dock-body { flex: 1 1 auto; overflow-y: auto; padding: .8rem; }
.dock-empty { color: var(--muted); text-align: center; padding: 2rem 1rem; font-size: .85rem; }
.dock-desc { font-size: .84rem; color: var(--txt-2); margin-bottom: 1rem; }

.ctrl-group { margin-bottom: 1.1rem; }
.ctrl-group > h4 { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border-bottom: 1px solid var(--line); padding-bottom: .35rem; margin-bottom: .7rem; }
.ctrl { margin-bottom: .85rem; }
.ctrl-lab { display: flex; align-items: baseline; justify-content: space-between; gap: .5rem; margin-bottom: .3rem; font-size: .83rem; }
.ctrl-val { font-family: var(--mono); font-size: .76rem; color: var(--accent); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 0 .4em; min-width: 2.8em; text-align: right; }
.ctrl-switch { display: flex; align-items: center; gap: .55rem; cursor: pointer; font-size: .85rem; }
.action-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .45rem; }
.action-grid .btn { justify-content: center; text-align: center; white-space: normal; min-height: 34px; line-height: 1.2; }

.help-block { background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r); padding: .6rem .75rem; margin-bottom: .6rem; }
.help-block h4 { font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--accent); margin-bottom: .25rem; }
.help-block p { margin: 0; font-size: .85rem; color: var(--txt-2); }
.help-block.challenge { border-left-color: var(--accent-2); }
.help-block.challenge h4 { color: var(--accent-2); }
.vocab { margin-top: .4rem; }
.vocab b { color: var(--txt); font-size: .84rem; }
.vocab span { display: block; color: var(--muted); font-size: .79rem; }
.mini-log { display: flex; flex-direction: column; gap: .2rem; }
.mini-log-row { display: flex; gap: .5rem; font-size: .78rem; color: var(--txt-2); }
.mini-log-row .t { color: var(--muted); font-family: var(--mono); }

/* Status bar */
#statusbar { grid-area: status; display: flex; align-items: center; gap: 1rem; padding: 0 .8rem; background: var(--panel); border-top: 1px solid var(--line); font-size: .76rem; color: var(--txt-2); }
.sb-left { display: flex; align-items: center; gap: .45rem; }
.sb-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.sb-dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.sb-metrics { display: flex; gap: .9rem; flex: 1 1 auto; overflow: hidden; }
.sb-metric { display: inline-flex; gap: .35rem; align-items: baseline; white-space: nowrap; }
.sb-metric .k { color: var(--muted); }
.sb-metric .v { font-family: var(--mono); color: var(--accent); }
.sb-right { color: var(--muted); white-space: nowrap; }

/* Home */
.page { max-width: 1180px; margin: 0 auto; padding: 1.4rem 1.6rem 2.5rem; }
.hero { background: linear-gradient(135deg, var(--panel-2), var(--panel)); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.6rem 1.8rem; margin-bottom: 1.5rem; }
.hero h1 { font-size: 1.7rem; margin-bottom: .3rem; }
.tagline { color: var(--accent); font-weight: 600; margin-bottom: .6rem; }
.byline { color: var(--txt-2); max-width: 70ch; margin-bottom: .9rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.section-head { display: flex; align-items: center; gap: .8rem; margin: 0 0 .9rem; }
.section-head h2 { margin: 0; font-size: 1.1rem; }
.section-head .line { flex: 1; height: 1px; background: var(--line); }
.catalog { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: .9rem; }
.mcard { text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1rem; cursor: pointer; display: flex; flex-direction: column; gap: .55rem; transition: border-color .12s, transform .08s, background .12s; }
.mcard:hover { border-color: var(--accent); transform: translateY(-2px); background: var(--panel-2); }
.mcard-top { display: flex; align-items: center; gap: .6rem; }
.mcard-ico { color: var(--accent); display: inline-flex; }
.mcard-title { font-weight: 650; flex: 1 1 auto; }
.mcard-desc { margin: 0; font-size: .84rem; color: var(--txt-2); }
.mcard-meta { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: auto; }

/* Native digit module */
.digit-module { display: flex; gap: 1.4rem; padding: 1.4rem; flex-wrap: wrap; align-items: flex-start; }
.digit-left { text-align: center; }
.digit-canvas { background: #0b0d10; border: 1px solid var(--line-2); border-radius: var(--r-lg); touch-action: none; cursor: crosshair; }
.digit-hint { margin-top: .5rem; color: var(--muted); font-size: .82rem; }
.digit-right { flex: 1 1 280px; min-width: 260px; }
.digit-status { font-size: .88rem; color: var(--txt-2); margin-bottom: .8rem; }
.digit-pred { font-size: 1.05rem; margin-bottom: .7rem; }
.digit-pred b { color: var(--accent); font-size: 1.5rem; }
.digit-row { display: flex; align-items: center; gap: .6rem; margin-bottom: .35rem; font-size: .82rem; }
.digit-lab { width: 1.4em; text-align: right; color: var(--txt-2); }
.digit-val { width: 3.6em; font-family: var(--mono); color: var(--muted); }
.bar { flex: 1; height: 8px; background: var(--elev); border-radius: 999px; overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 999px; transition: width .15s; }

/* Toast + modal */
#toast-root { position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 400; display: flex; flex-direction: column; gap: .5rem; align-items: flex-end; pointer-events: none; }
.toast { pointer-events: auto; background: var(--elev); border: 1px solid var(--line-2); border-left: 3px solid var(--accent); border-radius: var(--r); padding: .55rem .8rem; box-shadow: var(--shadow); font-size: .85rem; max-width: 360px; animation: tin .18s ease; }
.toast.ok { border-left-color: var(--ok); } .toast.warn { border-left-color: var(--warn); } .toast.err { border-left-color: var(--err); }
@keyframes tin { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
#modal-root { position: fixed; inset: 0; z-index: 300; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,.6); padding: 1rem; }
#modal-root[hidden] { display: none !important; }
.modal { background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--r-lg); box-shadow: var(--shadow); width: min(720px, 96vw); max-height: 88vh; display: flex; flex-direction: column; }
.modal-head { display: flex; align-items: center; gap: .5rem; padding: .8rem 1rem; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; flex: 1 1 auto; }
.modal-body { padding: 1rem; overflow-y: auto; }
.modal-foot { padding: .7rem 1rem; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: .5rem; }
table.data { width: 100%; border-collapse: collapse; font-size: .82rem; }
table.data th, table.data td { text-align: left; padding: .4em .6em; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data th { color: var(--muted); font-weight: 600; }

/* Responsive */
@media (max-width: 980px) {
  .app { grid-template-columns: 56px minmax(0, 1fr); grid-template-areas: "appbar appbar" "rail center" "status status"; }
  #dock { position: fixed; top: 52px; bottom: 30px; right: 0; width: min(88vw, 360px); z-index: 40; transform: translateX(102%); transition: transform .2s ease; box-shadow: var(--shadow); }
  .app.drawer-dock #dock { transform: translateX(0); }
  .app.dock-collapsed #dock { display: flex; }
  .brand-text span { display: none; }
}
@media (max-width: 620px) {
  .brand-text { display: none; }
  #appbar .btn span { display: none; }
}