/* Sinhala Proofreader Web App — clean, modern, theme-aware styling.
   Light is the default; [data-theme="dark"] on <html> flips to dark. */

:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --panel-2: #f0f2f7;
  --border: #dde1ea;
  --text: #1c2230;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --ok: #16a34a;
  --spell: #cc0000;
  --grammar: #cc6600;
  --encoding: #7c3aed;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);
  --radius: 12px;
  /* Combined stack so Sinhala AND Tamil both render (browser picks per script). */
  --sinhala: 'Iskoola Pota', 'Latha', 'Noto Sans Sinhala', 'Noto Sans Tamil', 'Nirmala UI', sans-serif;
  --intl: var(--sinhala);
}

html[data-theme="dark"] {
  --bg: #0f1320;
  --panel: #171c2b;
  --panel-2: #1e2436;
  --border: #2a3145;
  --text: #e6e9f2;
  --muted: #9aa3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --ok: #22c55e;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

/* Multilingual text (Sinhala + Tamil) uses the combined stack. */
.si, .intl { font-family: var(--intl); }

/* ---------- language switcher ---------- */
.langswitch { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.lang-btn {
  border: 0; background: var(--panel-2); color: var(--muted);
  padding: 7px 11px; font-size: 13px; font-weight: 700; cursor: pointer;
  font-family: var(--intl); border-right: 1px solid var(--border); line-height: 1;
}
.lang-btn:last-child { border-right: 0; }
.lang-btn:hover { background: var(--border); color: var(--text); }
.lang-btn.active { background: var(--accent); color: #fff; }

/* text-language override picker */
.langpick { display: inline-flex; align-items: center; gap: 6px; margin-left: auto; }
.langpick .lbl { color: var(--muted); font-size: 12.5px; }
.langpick select {
  padding: 7px 9px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text); font-size: 13px; font-family: var(--intl);
}

/* detected-language badge next to Results heading */
.detected-badge {
  font-size: 12px; font-weight: 600; color: var(--accent);
  background: rgba(37,99,235,.12); padding: 2px 10px; border-radius: 20px;
  margin-left: 8px; vertical-align: middle; text-transform: none; letter-spacing: 0;
  font-family: var(--intl);
}

.si { font-family: var(--sinhala); }

/* ---------- header ---------- */
header.appbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 20;
}
header.appbar .brand {
  font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 10px;
}
header.appbar .brand .logo {
  width: 32px; height: 32px; border-radius: 8px;
  object-fit: cover; display: block;
}
header.appbar .spacer { flex: 1; }
header.appbar .user { color: var(--muted); font-size: 14px; }
header.appbar .user b { color: var(--text); }

/* ---------- buttons ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 9px;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .05s;
  font-family: inherit;
}
.btn:hover { background: var(--border); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--spell); border-color: var(--spell); background: transparent; }
.btn.danger:hover { background: var(--spell); color: #fff; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.iconbtn {
  border: 1px solid var(--border); background: var(--panel-2);
  width: 38px; height: 38px; border-radius: 9px; cursor: pointer;
  color: var(--text); font-size: 16px; display: grid; place-items: center;
}
.iconbtn:hover { background: var(--border); }

/* ---------- layout ---------- */
main.wrap { max-width: 1280px; margin: 0 auto; padding: 20px; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex; flex-direction: column;
}
.panel h2 {
  margin: 0 0 12px; font-size: 15px; font-weight: 700;
  display: flex; align-items: center; gap: 8px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .03em;
}

/* ---------- input textarea ---------- */
textarea#input {
  width: 100%; min-height: 320px; resize: vertical;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); color: var(--text);
  padding: 14px; font-size: 16px; line-height: 1.7;
  font-family: var(--sinhala);
  outline: none;
}
textarea#input:focus { border-color: var(--accent); }

.counter { color: var(--muted); font-size: 13px; margin: 8px 2px 12px; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- results ---------- */
.result-box {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); padding: 14px;
  font-family: var(--sinhala); font-size: 16px; line-height: 1.8;
  min-height: 120px; margin-bottom: 12px;
  white-space: pre-wrap; word-break: break-word;
}
.result-box.empty { color: var(--muted); font-family: inherit; font-style: italic; }

textarea#corrected {
  width: 100%; min-height: 120px; resize: vertical;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); color: var(--text);
  padding: 14px; font-size: 16px; line-height: 1.8;
  font-family: var(--sinhala); outline: none; margin-bottom: 12px;
}
textarea#corrected:focus { border-color: var(--accent); }

.label-row { display:flex; align-items:center; justify-content: space-between; margin: 4px 0 6px; }
.label-row .lbl { color: var(--muted); font-size: 13px; font-weight: 600; }

/* highlights */
mark.spell-error   { background: var(--spell);   color: #fff; border-radius: 3px; padding: 1px 3px; cursor: help; }
mark.grammar-error { background: var(--grammar); color: #fff; border-radius: 3px; padding: 1px 3px; cursor: help; }
mark.encoding-error{ background: var(--encoding);color: #fff; border-radius: 3px; padding: 1px 3px; cursor: help; }

/* summary */
.summary { font-size: 13.5px; color: var(--muted); margin: 6px 0 0; font-family: var(--sinhala); }

/* ---------- error list ---------- */
.errorlist { margin-top: 18px; }
.errorlist .items { max-height: 320px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.err {
  display: flex; gap: 12px; align-items: flex-start;
  border: 1px solid var(--border); border-left-width: 4px;
  border-radius: 9px; padding: 10px 12px; background: var(--panel-2);
}
.err.spelling    { border-left-color: var(--spell); }
.err.grammar, .err.grammar_discord { border-left-color: var(--grammar); }
.err.encoding_error { border-left-color: var(--encoding); }
.err .ico { font-size: 18px; line-height: 1.4; }
.err .body { flex: 1; }
.err .change { font-family: var(--sinhala); font-size: 15px; }
.err .change .from { color: var(--spell); text-decoration: line-through; }
.err .change .to { color: var(--ok); font-weight: 700; }
.err .why { color: var(--muted); font-size: 13px; margin-top: 3px; font-family: var(--sinhala); }
.err .conf { color: var(--muted); font-size: 12px; white-space: nowrap; }
.err .tag { font-size: 11px; padding: 1px 7px; border-radius: 20px; background: var(--border); color: var(--text); }

.empty-state { color: var(--muted); text-align: center; padding: 20px; font-family: var(--sinhala); }

/* stats chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.chip { font-size: 12.5px; padding: 4px 10px; border-radius: 20px; background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); }
.chip b { color: var(--text); }

/* ---------- loading overlay ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(10, 14, 25, .55);
  display: none; place-items: center; z-index: 50; backdrop-filter: blur(2px);
}
.overlay.show { display: grid; }
.overlay .card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 34px; text-align: center; box-shadow: var(--shadow);
}
.spinner {
  width: 44px; height: 44px; margin: 0 auto 14px;
  border: 4px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.overlay .card .msg { font-family: var(--sinhala); font-size: 15px; }

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 11px 20px; border-radius: 10px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  z-index: 60; box-shadow: var(--shadow); max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--spell); color: #fff; }
.toast.ok { background: var(--ok); color: #fff; }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); padding: 32px; width: 100%; max-width: 380px;
}
.login-card .logo-big {
  width: 64px; height: 64px; border-radius: 16px; margin: 0 auto 16px;
  object-fit: cover; display: block;
}
.login-card h1 { text-align: center; font-size: 20px; margin: 0 0 4px; }
.login-card .sub { text-align: center; color: var(--muted); font-size: 13.5px; margin-bottom: 22px; font-family: var(--sinhala); }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; font-weight: 600; }
.field input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--panel-2); color: var(--text); font-size: 15px; outline: none;
}
.field input:focus { border-color: var(--accent); }
.field select {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--panel-2); color: var(--text); font-size: 15px; outline: none;
  font-family: var(--intl); cursor: pointer;
}
.field select:focus { border-color: var(--accent); }
.login-card .btn { width: 100%; justify-content: center; }
.flash { padding: 10px 13px; border-radius: 9px; font-size: 13.5px; margin-bottom: 14px; font-family: var(--sinhala); }
.flash.error { background: rgba(204,0,0,.12); color: var(--spell); border: 1px solid rgba(204,0,0,.3); }
.hint { text-align:center; color: var(--muted); font-size: 12px; margin-top: 16px; }

/* ---------- admin ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.stat-card .k { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .03em; }
.stat-card .v { font-size: 26px; font-weight: 800; margin-top: 4px; }

.admin-section { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin-bottom: 18px; }
.admin-section h3 { margin: 0 0 14px; font-size: 15px; }
.table-scroll { overflow-x: auto; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.tbl th, table.tbl td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
table.tbl th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; position: sticky; top: 0; background: var(--panel); }
table.tbl td.si { font-family: var(--sinhala); font-size: 15px; }
.mode-badge { font-size: 11px; padding: 2px 8px; border-radius: 12px; }
.mode-precheck { background: rgba(22,163,74,.15); color: var(--ok); }
.mode-inject_only { background: rgba(37,99,235,.15); color: var(--accent); }
.mode-disabled { background: var(--border); color: var(--muted); }

.form-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; margin-bottom: 8px; }
.form-row .field { margin-bottom: 0; flex: 1; min-width: 140px; }
.search-row { display:flex; gap:8px; margin-bottom: 14px; }
.search-row input { flex:1; padding: 9px 12px; border:1px solid var(--border); border-radius: 9px; background: var(--panel-2); color: var(--text); }

.keystatus { display:flex; align-items:center; gap:10px; flex-wrap: wrap; }
.mono { font-family: ui-monospace, 'Cascadia Code', Consolas, monospace; }
.pill { font-size: 12px; padding: 3px 10px; border-radius: 20px; }
.pill.ok { background: rgba(22,163,74,.15); color: var(--ok); }
.pill.bad { background: rgba(204,0,0,.15); color: var(--spell); }
.muted { color: var(--muted); }
a.link { color: var(--accent); text-decoration: none; }
a.link:hover { text-decoration: underline; }

/* ---------- app footer ---------- */
.appfooter {
  max-width: 1280px; margin: 8px auto 20px; padding: 14px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  text-align: center; border-top: 1px solid var(--border);
}
.appfooter .warn { color: #cc0000; font-weight: 700; font-size: 13.5px; }
.appfooter .credit { color: var(--muted); font-size: 12.5px; }
.appfooter.login { border-top: 0; margin-top: 18px; }
html[data-theme="dark"] .appfooter .warn { color: #ff5a5a; }
