/* ==========================================================================
   GULF LNG redesign — shared design tokens + shell.  v2 "Blue data + amber"
   Two selected themes: light (default) and dark, switched by
   <html data-theme="light|dark">. Pages reference tokens only — if a value
   is not here, it does not appear on screen.

   Direction from ui-ux-pro-max --design-system:
   blue data (#1E40AF/#3B82F6) + amber highlights (#D97706), light bg
   #F8FAFC, SVG outline icons (no emoji), subtle motion, dense spacing.
   Typeface deviates from the tool's Fira suggestion: IBM Plex Sans Thai +
   Plex Mono — the same technical pairing with real Thai support.
   ========================================================================== */
:root {
  /* ---- Surfaces --------------------------------------------------------- */
  --petrol-950: #F6F8FB;   /* page                          */
  --surface:    #FFFFFF;   /* card                          */
  --petrol-900: #EEF3F9;   /* recessed panel / chart fill   */
  --petrol-850: #E5ECF5;   /* raised row / seg track        */
  --petrol-800: #DDE6F0;   /* the one hairline              */
  --petrol-700: #B7C9DC;   /* pipe, no flow                 */
  --petrol-600: #3E6FA6;   /* pipe, flowing / on plan       */

  /* ---- Text ------------------------------------------------------------- */
  --ink:   #172A46;        /* primary                       */
  --ink-2: #44608C;        /* secondary — 6:1 on white      */
  --ink-3: #5E7891;        /* labels, units — 4.6:1         */

  /* ---- Brand + action --------------------------------------------------- */
  --brand:        #00A651;              /* GULF green, logo mark only  */
  --primary:      #1E40AF;              /* blue data                   */
  --primary-soft: rgba(30, 64, 175, .08);
  --accent:       #D97706;              /* amber highlight             */
  --accent-soft:  rgba(217, 119, 6, .12);

  /* ---- Status ------------------------------------------------------------ */
  --ok:       #0E8A4C;
  --warn:     #B45309;
  --warn-dim: rgba(217, 119, 6, .10);
  --crit:     #DC2626;
  --crit-dim: rgba(220, 38, 38, .08);

  /* ---- Chart series (validated CVD-safe on #F8FAFC) ---------------------- */
  --series-1: #2A78D6;
  --series-2: #EB6834;
  --series-3: #1BAF7A;

  /* ---- Effects ----------------------------------------------------------- */
  --shadow: 0 1px 2px rgba(23, 42, 70, .05), 0 4px 14px rgba(23, 42, 70, .06);
  --flow-dash: rgba(255, 255, 255, .60);   /* travelling dash on the trunk  */
  --hit: rgba(30, 64, 175, .05);           /* schematic hover target        */
  --seg-active-bg: #FFFFFF;
  --seg-active-shadow: 0 1px 3px rgba(23, 42, 70, .14);

  /* ---- Type -------------------------------------------------------------- */
  --font-ui:   "IBM Plex Sans", "IBM Plex Sans Thai", system-ui, sans-serif;
  --font-num:  "IBM Plex Mono", ui-monospace, monospace;

  --t-xs:  11px;
  --t-sm:  13px;
  --t-md:  15px;
  --t-lg:  19px;
  --t-xl:  26px;
  --t-2xl: 38px;

  /* ---- Space & shape ------------------------------------------------------ */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;
  --sp-4: 16px; --sp-5: 24px; --sp-6: 32px;
  --r-sm: 6px; --r-md: 10px; --r-lg: 12px; --r-pill: 999px;

  --gutter: 32px;
  --line: 1px solid var(--petrol-800);
}

:root[data-theme="dark"] {
  --petrol-950: #0B1322;
  --surface:    #111C30;
  --petrol-900: #0E1830;
  --petrol-850: #1A2740;
  --petrol-800: #20304C;
  --petrol-700: #27436A;
  --petrol-600: #4B7FB4;

  --ink:   #E7EEF8;
  --ink-2: #A3B5CD;
  --ink-3: #7189A6;

  --brand:        #00A651;
  --primary:      #7CB1F8;
  --primary-soft: rgba(96, 165, 250, .14);
  --accent:       #F59E0B;
  --accent-soft:  rgba(245, 158, 11, .15);

  --ok:       #2BBB70;
  --warn:     #F0A94B;
  --warn-dim: rgba(240, 169, 75, .15);
  --crit:     #EF5350;
  --crit-dim: rgba(239, 83, 80, .16);

  --series-1: #3987E5;
  --series-2: #D95926;
  --series-3: #199E70;

  --shadow: none;
  --flow-dash: rgba(228, 238, 243, .30);
  --hit: rgba(255, 255, 255, .045);
  --seg-active-bg: rgba(255, 255, 255, .12);
  --seg-active-shadow: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--petrol-950);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--t-sm);
  -webkit-font-smoothing: antialiased;
}

/* The real canvas is IDboxRT's #companyFrame iframe: 1906 x 838. */
.app { display: flex; flex-direction: column; min-height: 100%; }

a, button { transition: color .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease; }
button { cursor: pointer; }

/* Inline SVG icons (outline, currentColor) */
.ic { vertical-align: -3px; flex: none; }

/* ---------------------------------------------------------------- nav --- */
.nav {
  display: flex; align-items: center; gap: var(--sp-4);
  height: 52px; flex: none;
  padding: 0 var(--sp-5);
  background: var(--surface);
  border-bottom: var(--line);
}
.brand {
  display: flex; align-items: center; gap: 7px;
  font-weight: 700; letter-spacing: .06em; margin-right: var(--sp-2);
}
.brand .ic { color: var(--brand); }
.brand b { color: var(--brand); font-size: var(--t-md); }
.brand span { color: var(--ink-3); font-size: var(--t-xs); letter-spacing: .18em; }

.nav-links { display: flex; gap: 2px; flex: 1; flex-wrap: nowrap; }
.nav-links a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 10px; border-radius: var(--r-sm);
  color: var(--ink-2); text-decoration: none;
  font-size: var(--t-sm); white-space: nowrap;
}
.nav-links a .ic { opacity: .75; }
.nav-links a:hover { color: var(--ink); background: var(--petrol-850); }
.nav-links a[aria-current] { color: var(--primary); font-weight: 600; background: var(--primary-soft); }
.nav-links a[aria-current] .ic { opacity: 1; }

.nav-meta {
  display: flex; align-items: center; gap: var(--sp-3);
  font-family: var(--font-num); font-size: var(--t-sm);
  color: var(--ink-2); font-variant-numeric: tabular-nums;
}
.nav-meta .user { font-family: var(--font-ui); color: var(--ink-3); }
.theme-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--r-sm);
  border: var(--line); background: transparent; color: var(--ink-2);
}
.theme-btn:hover { color: var(--ink); background: var(--petrol-850); }

/* ------------------------------------------------------------- status --- */
.status {
  display: flex; align-items: center; gap: var(--sp-3);
  min-height: 34px; flex: none;
  padding: 3px var(--gutter);
  font-size: var(--t-md);
}
.status.is-warn { background: var(--warn-dim); }
.status.is-crit { background: var(--crit-dim); }
.status .ic { flex: none; }
.status.is-warn .ic, .status.is-warn strong { color: var(--warn); }
.status.is-crit .ic, .status.is-crit strong { color: var(--crit); }
.status .dot { width: 7px; height: 7px; border-radius: var(--r-pill); background: var(--warn); flex: none; }
.status.is-crit .dot { background: var(--crit); }
.status strong { font-weight: 600; }
.status .sep { color: var(--ink-3); }
.status .muted { color: var(--ink-2); font-size: var(--t-sm); }

/* Density / period switch — pill track with a raised active thumb */
.seg { display: inline-flex; margin-left: auto; gap: 2px; background: var(--petrol-850); border-radius: var(--r-pill); padding: 2px; }
.seg.inline { margin-left: 0; }
.seg button {
  display: inline-flex; align-items: center; gap: 5px;
  border: 0; background: transparent; color: var(--ink-3);
  font: 500 var(--t-xs)/1 var(--font-ui);
  padding: 5px 11px; border-radius: var(--r-pill);
}
.seg button:hover { color: var(--ink-2); }
.seg button[aria-pressed="true"] {
  background: var(--seg-active-bg); color: var(--ink);
  box-shadow: var(--seg-active-shadow); font-weight: 600;
}

/* ---------------------------------------------------------------- kpi --- */
.kpis {
  display: flex; flex-wrap: wrap;
  gap: var(--sp-4) 64px;
  padding: var(--sp-4) var(--gutter) var(--sp-3);
}
.kpi-name { display: flex; align-items: center; gap: 6px; font-size: var(--t-xs); letter-spacing: .12em; color: var(--ink-3); text-transform: uppercase; }
.kpi-name .ic { color: var(--primary); opacity: .85; }
.kpi-body { display: flex; align-items: baseline; gap: var(--sp-3); margin-top: 4px; }
.kpi-value {
  font-family: var(--font-num); font-weight: 500;
  font-size: var(--t-2xl); line-height: 1; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.kpi-value.sm { font-size: var(--t-xl); }
.kpi-unit { font-size: var(--t-xs); color: var(--ink-3); font-family: var(--font-num); }
.kpi-delta { font-family: var(--font-num); font-size: var(--t-sm); font-variant-numeric: tabular-nums; }
.kpi-sub { font-size: var(--t-xs); color: var(--ink-3); font-family: var(--font-num); margin-top: 5px; }

.is-ok   { color: var(--ok); }
.is-warn { color: var(--warn); }
.is-crit { color: var(--crit); }

/* -------------------------------------------------------------- panel --- */
/* Panels are cards now: white surface, hairline, soft shadow (light only). */
.main { flex: 1; padding: var(--sp-4) var(--gutter); display: grid; gap: var(--sp-5); align-content: start; }
.panel {
  background: var(--surface);
  border: var(--line); border-radius: var(--r-lg);
  padding: var(--sp-4) var(--sp-4) var(--sp-4);
  box-shadow: var(--shadow);
}
.panel h2 {
  display: flex; align-items: center; gap: 7px;
  margin: 0 0 var(--sp-3);
  font-size: var(--t-xs); font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2);
}
.panel h2 .ic { color: var(--primary); }
.panel h2 .count { color: var(--warn); }
.panel h2 .count.crit { color: var(--crit); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); }
.panel-head .key { font-size: var(--t-xs); color: var(--ink-3); letter-spacing: 0; text-transform: none; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4) var(--sp-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4) var(--sp-4); }

/* -------------------------------------------------------------- table --- */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th {
  text-align: left; font-size: var(--t-xs); font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3);
  padding: 6px var(--sp-3); border-bottom: var(--line); white-space: nowrap;
}
.tbl td {
  padding: 7px var(--sp-3); font-size: var(--t-sm);
  border-bottom: 1px solid var(--petrol-850);
  transition: background-color .15s ease;
}
.tbl tr:last-child td { border-bottom: 0; }
.tbl tr:hover td { background: var(--petrol-900); }
.tbl .num, .tbl th.num { text-align: right; font-family: var(--font-num); font-variant-numeric: tabular-nums; }
.tbl .id { font-weight: 600; }
.tbl .dim { color: var(--ink-3); }
.tbl .time { font-family: var(--font-num); color: var(--ink-2); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* --------------------------------------------------------------- chip --- */
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px; border-radius: var(--r-pill);
  font-size: var(--t-xs); font-weight: 500; white-space: nowrap;
}
.chip .ic { margin: 0; }
.chip--quiet { background: var(--petrol-850); color: var(--ink-2); }
.chip--hollow { color: var(--ink-3); box-shadow: inset 0 0 0 1px var(--petrol-700); }
.chip--warn { background: var(--warn-dim); color: var(--warn); }
.chip--crit { background: var(--crit-dim); color: var(--crit); }
.chip--accent { background: var(--accent-soft); color: var(--accent); }

/* --------------------------------------------------------------- rows --- */
.watch { display: grid; gap: var(--sp-1); }
.watch-row {
  display: grid; grid-template-columns: 3px 1fr auto auto;
  align-items: center; gap: var(--sp-3);
  background: var(--petrol-900); padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
}
.watch-row .bar { width: 3px; height: 24px; border-radius: var(--r-pill); }
.watch-name { font-weight: 600; font-size: var(--t-sm); }
.watch-where { font-size: var(--t-xs); color: var(--ink-3); }
.watch-dev { font-family: var(--font-num); font-size: var(--t-md); font-variant-numeric: tabular-nums; }
.watch-age { font-family: var(--font-num); font-size: var(--t-xs); color: var(--ink-3); min-width: 48px; text-align: right; }
.watch-empty { color: var(--ink-3); font-size: var(--t-sm); padding: var(--sp-5) 0; text-align: center; }

/* -------------------------------------------------------------- chart --- */
.chart svg { width: 100%; height: auto; display: block; margin-top: var(--sp-1); }
.chart-key { font-size: var(--t-xs); color: var(--ink-3); }
.chart-key .k { display: inline-flex; align-items: center; gap: 6px; margin-left: var(--sp-4); }
.chart-key .swatch { width: 14px; height: 3px; border-radius: var(--r-pill); display: inline-block; }

/* --------------------------------------------------------------- form --- */
.field { display: grid; grid-template-columns: 1fr auto; gap: var(--sp-1) var(--sp-5); align-items: center; padding: var(--sp-3) 0; border-bottom: 1px solid var(--petrol-850); }
.field:last-child { border-bottom: 0; }
.field-name { font-size: var(--t-sm); font-weight: 600; }
.field-desc { grid-column: 1; font-size: var(--t-xs); color: var(--ink-3); line-height: 1.5; }
.field-ctl { grid-column: 2; grid-row: 1 / span 2; display: flex; align-items: center; gap: var(--sp-2); }
.field-default { font-size: var(--t-xs); color: var(--ink-3); font-family: var(--font-num); }
input.num-in {
  width: 72px; padding: 6px 8px; text-align: right;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--petrol-700); border-radius: var(--r-sm);
  font: 500 var(--t-sm)/1 var(--font-num); font-variant-numeric: tabular-nums;
  transition: border-color .18s ease, box-shadow .18s ease;
}
input.num-in:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: transparent; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: var(--r-sm); cursor: pointer;
  background: var(--surface); color: var(--ink-2);
  border: 1px solid var(--petrol-700);
  font: 500 var(--t-sm)/1 var(--font-ui);
}
.btn:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
.btn--primary { background: var(--primary); border-color: var(--primary); color: #FFFFFF; }
.btn--primary:hover { background: var(--primary); color: #FFFFFF; opacity: .92; }

/* --------------------------------------------------------------- note --- */
.note {
  padding: var(--sp-4) var(--gutter) var(--sp-5);
  font-size: var(--t-xs); color: var(--ink-3); line-height: 1.6;
  border-top: var(--line); margin-top: var(--sp-4);
}
.note code { font-family: var(--font-num); color: var(--ink-2); }
details.note summary { cursor: pointer; font-weight: 600; color: var(--ink-2); }
details.note[open] summary { margin-bottom: var(--sp-1); }

:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ------------------------------------------------------------- motion --- */
@media (prefers-reduced-motion: no-preference) {
  #flow, .flowdash { animation: flow 9s linear infinite; }
  @keyframes flow { to { stroke-dashoffset: -320; } }
  .pulse { animation: pulse 2.6s ease-in-out infinite; }
  @keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .4 } }
}

@media (max-width: 1400px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .kpis { gap: var(--sp-3) 48px; }
}
