/* ============================================================
   APPEM — Design System v5
   "Blueprint"
   The wireframe aesthetic, promoted to production.
   Warm canvas. Source Serif display. JetBrains data. One accent.
   ============================================================ */

/* Fonts are self-hosted — see fonts.css (loaded before this file). */

:root {
  /* ---------- FONT STACKS ---------- */
  --font-display: "Source Serif 4", "Fraser", Georgia, serif;
  --font-serif:   "Source Serif 4", Georgia, serif;
  --font-sans:    "Inter Tight", "Söhne", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", "Berkeley Mono", ui-monospace, monospace;

  /* ---------- PAPER / CANVAS ---------- */
  /* Warm off-white canvas — the page the blueprint is drawn on. */
  --paper-0:   #FFFFFF;    /* raised surfaces, inputs */
  --paper-50:  #FBFAF5;    /* marketing/print-ish */
  --paper-100: #F4F3EF;    /* PRIMARY canvas */
  --paper-200: #EAE8E1;    /* sunken, table stripe */
  --paper-300: #E0DDD3;
  --paper-400: #CFCBC0;    /* primary rule / stroke */
  --paper-500: #B8B4A8;
  --paper-600: #9A958A;    /* strong stroke, axis */
  --paper-700: #6E6A60;

  /* ---------- INK ---------- */
  /* Slightly cool grays — the drawing on the paper. */
  --ink-50:  #F0F1F4;
  --ink-100: #E2E4E9;
  --ink-200: #C5C9D2;
  --ink-300: #8C8F97;      /* placeholder / disabled fg */
  --ink-400: #6B6F79;      /* tertiary text */
  --ink-500: #5B6069;      /* meta / captions */
  --ink-600: #3D424D;      /* secondary text */
  --ink-700: #262A33;
  --ink-800: #1E2129;      /* PRIMARY text */
  --ink-900: #11131A;

  /* ---------- OCEAN (the shell brand — imported from v4) ---------- */
  --ocean-500: #1F3E66;
  --ocean-700: #0E2238;
  --ocean-800: #081729;
  --ocean-900: #040E1C;
  --teal-400:  #1EC7BF;
  --teal-500:  #10A8A1;

  /* ---------- ACCENT ---------- */
  /* Deep ocean, used only on active / current / focus. Never on surfaces. */
  --accent: #1F3E66;
  --accent-soft: rgba(31, 62, 102, 0.12);
  --accent-ring: rgba(31, 62, 102, 0.20);

  /* ---------- SEMANTIC ---------- */
  /* Muted, drawn-with-pigment tones. Never electric. */
  --sage-700:  #3D6A55;
  --sage-50:   #DCE8DF;
  --ochre-700: #8A6A2E;
  --ochre-50:  #F2E8D2;
  --brick-700: #8B3A32;
  --brick-50:  #F0DAD6;
  --steel-700: #3D5A7A;
  --steel-50:  #DCE4EE;

  --success:       var(--sage-700);
  --success-soft:  var(--sage-50);
  --warning:       var(--ochre-700);
  --warning-soft:  var(--ochre-50);
  --danger:        var(--brick-700);
  --danger-soft:   var(--brick-50);
  --info:          var(--steel-700);
  --info-soft:     var(--steel-50);

  /* ---------- SEMANTIC TOKENS (surfaces) ---------- */
  --bg-canvas:         var(--paper-100);
  --bg-raised:         var(--paper-0);
  --bg-sunk:           var(--paper-200);
  --bg-stripe:         var(--paper-50);

  /* ---------- FOREGROUND ---------- */
  --fg-primary:        var(--ink-800);
  --fg-secondary:      var(--ink-500);
  --fg-tertiary:       var(--ink-400);
  --fg-placeholder:    var(--ink-300);
  --fg-accent:         var(--accent);
  --fg-on-accent:      #FFFFFF;
  --fg-on-dark:        #E3E7EC;
  --fg-on-dark-dim:    #9FB1C6;

  /* ---------- BORDERS ---------- */
  --rule:              var(--paper-400);        /* primary */
  --rule-soft:         #E3DFD4;
  --rule-strong:       var(--paper-600);
  --rule-dashed:       var(--paper-400);
  --rule-on-dark:      rgba(255,255,255,0.08);
  --rule-on-dark-str:  rgba(255,255,255,0.14);
  --focus-ring:        var(--accent-ring);

  /* ---------- TYPE SCALE (display) ---------- */
  --fs-display-xl: clamp(56px, 7vw, 96px);
  --fs-display-l:  clamp(40px, 5vw, 64px);
  --fs-display-m:  clamp(32px, 3.5vw, 44px);
  --fs-display-s:  28px;

  --fs-h1: 44px;
  --fs-h2: 32px;
  --fs-h3: 22px;
  --fs-h4: 18px;

  --fs-body-l: 17px;
  --fs-body:   15px;
  --fs-body-s: 13.5px;
  --fs-caption: 12px;

  --fs-mono-l: 13px;
  --fs-mono:   12px;
  --fs-mono-s: 10.5px;

  --lh-tight: 1.15;
  --lh-body:  1.5;
  --lh-loose: 1.6;

  --lt-display: -0.02em;
  --lt-tight:   -0.01em;
  --lt-body:    0em;
  --lt-label:   0.08em;
  --lt-eyebrow: 0.14em;

  /* ---------- SPACING (4/8 scale) ---------- */
  --sp-0: 0;
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-7: 32px;
  --sp-8: 40px;
  --sp-9: 48px;
  --sp-10: 64px;
  --sp-11: 80px;
  --sp-12: 96px;

  /* ---------- RADII ---------- */
  /* Blueprint = mostly crisp corners. Small radius only. */
  --r-0: 0;
  --r-1: 2px;
  --r-2: 3px;   /* default */
  --r-3: 4px;
  --r-4: 6px;   /* cards */
  --r-full: 999px;

  /* ---------- SHADOWS ---------- */
  /* Whisper-thin. No drop-shadow bravado. Always paired with a border. */
  --sh-0: none;
  --sh-1: 0 1px 0 rgba(17, 19, 26, 0.04);
  --sh-2: 0 1px 2px rgba(17, 19, 26, 0.06), 0 1px 0 rgba(17, 19, 26, 0.03);
  --sh-3: 0 4px 12px rgba(17, 19, 26, 0.08);
  --sh-4: 0 12px 32px -8px rgba(17, 19, 26, 0.14);
  --sh-focus: 0 0 0 3px var(--focus-ring);

  /* ---------- DENSITY (comfortable default) ---------- */
  --row-h:       48px;
  --input-h:     40px;
  --btn-h:       36px;
  --btn-h-lg:    44px;
  --btn-h-sm:    28px;
  --cell-pad-y:  12px;
  --cell-pad-x:  16px;
  --card-pad:    24px;
  --gap-stack:   16px;
  --section-gap: 48px;

  /* ---------- DURATIONS ---------- */
  --dur-fast:  100ms;
  --dur-base:  180ms;
  --dur-slow:  280ms;
  --ease-out:  cubic-bezier(0.2, 0.8, 0.3, 1);

  /* ---------- Z-INDEX ---------- */
  --z-sticky: 30;
  --z-drawer: 40;
  --z-modal:  50;
  --z-toast:  60;
}

/* ----------------------------------------------------------
   DENSITY: COMPACT MODE
   Toggle by adding data-density="compact" on a root element
   ---------------------------------------------------------- */
[data-density="compact"] {
  --row-h:       36px;
  --input-h:     32px;
  --btn-h:       28px;
  --btn-h-lg:    36px;
  --btn-h-sm:    24px;
  --cell-pad-y:  8px;
  --cell-pad-x:  12px;
  --card-pad:    16px;
  --gap-stack:   10px;
  --section-gap: 32px;
  --fs-body:   14px;
  --fs-body-s: 12.5px;
}

/* ============================================================
   BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--fg-primary);
  background: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv11", "ss01";
}

:focus-visible { outline: 0; box-shadow: var(--sh-focus); border-radius: var(--r-2); }

::selection { background: var(--accent); color: #fff; }

/* ============================================================
   TYPE PRIMITIVES
   ============================================================ */
.t-display-xl { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-display-xl); line-height: var(--lh-tight); letter-spacing: var(--lt-display); }
.t-display-l  { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-display-l);  line-height: var(--lh-tight); letter-spacing: var(--lt-display); }
.t-display-m  { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-display-m);  line-height: var(--lh-tight); letter-spacing: var(--lt-display); }
.t-display-s  { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-display-s);  line-height: var(--lh-tight); letter-spacing: var(--lt-tight); }
.t-h1 { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-h1); line-height: 1.12; letter-spacing: var(--lt-display); margin: 0; }
.t-h2 { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-h2); line-height: 1.18; letter-spacing: var(--lt-display); margin: 0; }
.t-h3 { font-family: var(--font-display); font-weight: 400; font-size: var(--fs-h3); line-height: 1.25; letter-spacing: var(--lt-tight); margin: 0; }
.t-h4 { font-family: var(--font-sans);    font-weight: 500; font-size: var(--fs-h4); line-height: 1.35; letter-spacing: 0; margin: 0; }

.t-body-l { font-size: var(--fs-body-l); line-height: var(--lh-body); }
.t-body   { font-size: var(--fs-body);   line-height: var(--lh-body); }
.t-body-s { font-size: var(--fs-body-s); line-height: var(--lh-body); }
.t-caption { font-size: var(--fs-caption); line-height: 1.45; color: var(--fg-secondary); }

.t-label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: var(--lt-label);
  text-transform: uppercase;
  color: var(--fg-secondary);
}
.t-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: var(--lt-eyebrow);
  text-transform: uppercase;
  color: var(--fg-secondary);
}
.t-mono     { font-family: var(--font-mono); font-size: var(--fs-mono); }
.t-num      { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.t-italic   { font-family: var(--font-serif); font-style: italic; }

.t-muted { color: var(--fg-secondary); }
.t-dim   { color: var(--fg-tertiary); }

.t-ital-accent em { font-style: italic; color: var(--fg-secondary); font-weight: 400; }

/* ============================================================
   BUTTON
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  height: var(--btn-h);
  padding: 0 14px;
  border: 1px solid var(--ink-800);
  background: var(--ink-800);
  color: #fff;
  font: inherit;
  font-size: var(--fs-body-s);
  font-weight: 500;
  border-radius: var(--r-2);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast), box-shadow var(--dur-fast);
  white-space: nowrap;
}
.btn:hover { background: var(--ink-900); border-color: var(--ink-900); }
.btn:active { transform: translateY(0.5px); }
.btn[disabled], .btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn--ghost {
  background: transparent;
  color: var(--fg-primary);
  border-color: var(--rule);
}
.btn--ghost:hover { background: var(--bg-sunk); border-color: var(--rule-strong); color: var(--fg-primary); }

.btn--subtle {
  background: var(--bg-sunk);
  border-color: transparent;
  color: var(--fg-primary);
}
.btn--subtle:hover { background: var(--paper-300); }

.btn--accent {
  background: var(--accent);
  border-color: var(--accent);
}
.btn--accent:hover { background: #172F4E; border-color: #172F4E; }

.btn--danger {
  background: var(--danger);
  border-color: var(--danger);
}

.btn--lg { height: var(--btn-h-lg); padding: 0 20px; font-size: var(--fs-body); }
.btn--sm { height: var(--btn-h-sm); padding: 0 10px; font-size: var(--fs-caption); }

.btn--icon {
  padding: 0;
  width: var(--btn-h);
  min-width: var(--btn-h);
}
.btn--icon.btn--sm { width: var(--btn-h-sm); min-width: var(--btn-h-sm); }

/* ============================================================
   INPUT
   ============================================================ */
.input, .textarea, .select {
  display: block;
  width: 100%;
  height: var(--input-h);
  padding: 0 12px;
  border: 1px solid var(--rule);
  background: var(--paper-0);
  color: var(--fg-primary);
  font: inherit;
  font-size: var(--fs-body-s);
  border-radius: var(--r-2);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.input::placeholder, .textarea::placeholder { color: var(--fg-placeholder); }
.input:hover, .textarea:hover, .select:hover { border-color: var(--rule-strong); }
.input:focus, .textarea:focus, .select:focus {
  outline: 0;
  border-color: var(--accent);
  box-shadow: var(--sh-focus);
}
.textarea { height: auto; padding: 10px 12px; min-height: 96px; resize: vertical; line-height: 1.5; }
.input--mono { font-family: var(--font-mono); font-size: var(--fs-mono); }

.input-group {
  display: flex; flex-direction: column; gap: 6px;
}
.input-group label {
  font-size: var(--fs-body-s);
  color: var(--fg-primary);
  font-weight: 500;
}
.input-group .help { font-size: var(--fs-caption); color: var(--fg-tertiary); }
.input-group.is-invalid .input,
.input-group.is-invalid .textarea,
.input-group.is-invalid .select { border-color: var(--danger); }
.input-group.is-invalid .help { color: var(--danger); }

/* Checkbox / radio */
.check {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: var(--fs-body-s);
  cursor: pointer;
}
.check input { appearance: none; width: 16px; height: 16px; border: 1px solid var(--rule-strong); background: var(--paper-0); border-radius: var(--r-1); display: grid; place-items: center; cursor: pointer; }
.check input[type=radio] { border-radius: 50%; }
.check input:checked { background: var(--accent); border-color: var(--accent); }
.check input:checked::after { content: ""; width: 8px; height: 8px; background: #fff; border-radius: inherit; }
.check input[type=checkbox]:checked::after {
  content: "";
  width: 10px; height: 6px;
  border: 2px solid #fff; border-top: 0; border-right: 0;
  transform: rotate(-45deg) translate(1px, -1px);
  background: transparent;
}

/* Switch */
.switch { appearance: none; width: 34px; height: 18px; border-radius: 100px; background: var(--paper-400); position: relative; cursor: pointer; transition: background var(--dur-fast); }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: #fff; transition: left var(--dur-fast); box-shadow: var(--sh-1); }
.switch:checked { background: var(--accent); }
.switch:checked::after { left: 18px; }

/* Segmented */
.segmented {
  display: inline-flex;
  border: 1px solid var(--rule);
  background: var(--paper-0);
  border-radius: var(--r-2);
  overflow: hidden;
  height: var(--btn-h);
}
.segmented button {
  appearance: none; border: 0; background: transparent; color: var(--fg-secondary);
  font: inherit; font-size: var(--fs-body-s);
  padding: 0 14px;
  cursor: pointer;
  border-right: 1px solid var(--rule-soft);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.segmented button:last-child { border-right: 0; }
.segmented button[aria-pressed="true"] { background: var(--ink-800); color: #fff; }
.segmented button:hover:not([aria-pressed="true"]) { background: var(--bg-sunk); color: var(--fg-primary); }

/* ============================================================
   CARD / PANEL / BOX
   ============================================================ */
.card {
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  box-shadow: var(--sh-1);
}
.card__head {
  padding: 14px var(--card-pad);
  border-bottom: 1px solid var(--rule-soft);
  display: flex; align-items: center; gap: 12px;
}
.card__body { padding: var(--card-pad); }
.card__foot {
  padding: 12px var(--card-pad);
  border-top: 1px solid var(--rule-soft);
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-stripe);
  border-radius: 0 0 var(--r-4) var(--r-4);
}

.panel {
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  padding: var(--card-pad);
}
.panel--sunk { background: var(--bg-sunk); border-color: var(--rule-soft); }
.panel--dashed { border-style: dashed; background: transparent; }

/* ============================================================
   BADGE / CHIP / STATUS PILL
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  height: 20px;
  padding: 0 8px;
  border-radius: var(--r-1);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-secondary);
  background: var(--bg-sunk);
  border: 1px solid var(--rule-soft);
}
.badge--success { color: var(--success); background: var(--success-soft); border-color: transparent; }
.badge--warning { color: var(--warning); background: var(--warning-soft); border-color: transparent; }
.badge--danger  { color: var(--danger);  background: var(--danger-soft);  border-color: transparent; }
.badge--info    { color: var(--info);    background: var(--info-soft);    border-color: transparent; }
.badge--solid   { color: #fff; background: var(--ink-800); border-color: var(--ink-800); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--r-full);
  font-size: var(--fs-body-s);
  color: var(--fg-primary);
  background: var(--paper-0);
  border: 1px solid var(--rule);
}
.chip--active { background: var(--ink-800); color: #fff; border-color: var(--ink-800); }

.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--ink-300); }
.dot--success { background: var(--success); }
.dot--warning { background: var(--warning); }
.dot--danger  { background: var(--danger); }
.dot--info    { background: var(--info); }
.dot--live    { background: var(--success); box-shadow: 0 0 0 3px rgba(61, 106, 85, 0.15); }

/* ============================================================
   TABLE
   ============================================================ */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-body-s);
}
.table thead th {
  text-align: left;
  padding: 10px var(--cell-pad-x);
  background: var(--bg-sunk);
  border-bottom: 1px solid var(--rule-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: var(--lt-label);
  text-transform: uppercase;
  color: var(--fg-secondary);
  font-weight: 500;
}
.table tbody td {
  padding: var(--cell-pad-y) var(--cell-pad-x);
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: middle;
}
.table tbody tr:hover td { background: var(--bg-stripe); }
.table tbody tr:last-child td { border-bottom: 0; }
.table--striped tbody tr:nth-child(even) td { background: var(--bg-stripe); }
.table .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ============================================================
   STAT CARD (big serif numbers)
   ============================================================ */
.stat {
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  padding: 20px;
  display: flex; flex-direction: column; gap: 10px;
  position: relative;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: var(--lt-label);
  text-transform: uppercase;
  color: var(--fg-secondary);
  display: flex; align-items: center; gap: 8px;
}
.stat__value {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 44px;
  line-height: 1;
  letter-spacing: var(--lt-display);
}
.stat__delta { font-family: var(--font-mono); font-size: var(--fs-mono-s); color: var(--fg-tertiary); }
.stat__delta--up   { color: var(--success); }
.stat__delta--down { color: var(--danger); }
.stat--highlight { border: 1.5px solid var(--ink-800); }

/* ============================================================
   STEPPER
   ============================================================ */
.stepper {
  display: flex; align-items: center;
  gap: 10px;
  padding: 18px 0;
}
.stepper .step {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  color: var(--fg-secondary);
  padding: 4px 6px;
  border-radius: var(--r-2);
}
.stepper .step:hover { background: rgba(0,0,0,0.03); }
.stepper .step__num {
  width: 22px; height: 22px; border-radius: 50%;
  border: 1px solid var(--rule-strong);
  background: var(--paper-0);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
}
.stepper .step__label {
  font-family: var(--font-display);
  font-size: var(--fs-body);
  letter-spacing: var(--lt-tight);
}
.stepper .step__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-tertiary);
}
.stepper .step__text { display: flex; flex-direction: column; line-height: 1.15; }
.stepper .step.is-done .step__num { background: var(--fg-secondary); color: #fff; border-color: var(--fg-secondary); }
.stepper .step.is-current .step__num { background: var(--accent); color: #fff; border-color: var(--accent); }
.stepper .step.is-current .step__label { color: var(--fg-primary); font-weight: 500; }
.stepper .connector { flex: 1; height: 1px; background: var(--rule); max-width: 80px; }

/* ============================================================
   TABS
   ============================================================ */
.tabs {
  display: flex; gap: 24px;
  border-bottom: 1px solid var(--rule);
}
.tabs button {
  appearance: none; border: 0; background: transparent;
  font: inherit; font-size: var(--fs-body-s);
  color: var(--fg-secondary);
  padding: 10px 0;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.tabs button:hover { color: var(--fg-primary); }
.tabs button[aria-selected="true"] {
  color: var(--fg-primary);
  border-bottom-color: var(--accent);
  font-weight: 500;
}

/* ============================================================
   MENU / DROPDOWN / POPOVER
   ============================================================ */
.menu {
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  box-shadow: var(--sh-3);
  padding: 6px;
  min-width: 200px;
}
.menu__item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  font-size: var(--fs-body-s);
  border-radius: var(--r-2);
  cursor: pointer;
  color: var(--fg-primary);
}
.menu__item:hover { background: var(--bg-sunk); }
.menu__item .kbd {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  color: var(--fg-tertiary);
}
.menu__sep { height: 1px; background: var(--rule-soft); margin: 4px 2px; }

/* ============================================================
   MODAL / DRAWER
   ============================================================ */
.backdrop {
  position: fixed; inset: 0;
  background: rgba(17, 19, 26, 0.35);
  backdrop-filter: blur(2px);
  z-index: var(--z-modal);
}
.modal {
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  box-shadow: var(--sh-4);
  width: min(560px, calc(100vw - 40px));
  max-height: calc(100vh - 80px);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.modal__head { padding: 18px 24px 14px; border-bottom: 1px solid var(--rule-soft); }
.modal__body { padding: 20px 24px; overflow-y: auto; flex: 1; }
.modal__foot { padding: 14px 24px; border-top: 1px solid var(--rule-soft); background: var(--bg-stripe); display: flex; gap: 10px; justify-content: flex-end; }

.drawer {
  background: var(--paper-0);
  border-left: 1px solid var(--rule);
  width: min(460px, 90vw);
  height: 100vh;
  box-shadow: var(--sh-4);
  display: flex; flex-direction: column;
}

/* ============================================================
   TOAST / BANNER / INLINE ALERT
   ============================================================ */
.toast {
  background: var(--ink-800);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--r-2);
  font-size: var(--fs-body-s);
  box-shadow: var(--sh-4);
  display: inline-flex; align-items: center; gap: 10px;
}
.banner {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--fg-secondary);
  border-radius: var(--r-2);
  padding: 12px 14px;
  background: var(--paper-0);
  font-size: var(--fs-body-s);
  display: flex; align-items: flex-start; gap: 12px;
}
.banner--success { border-left-color: var(--success); background: var(--success-soft); }
.banner--warning { border-left-color: var(--warning); background: var(--warning-soft); }
.banner--danger  { border-left-color: var(--danger);  background: var(--danger-soft); }
.banner--info    { border-left-color: var(--info);    background: var(--info-soft); }

/* ============================================================
   EMPTY / SKELETON
   ============================================================ */
.empty {
  border: 1px dashed var(--rule);
  border-radius: var(--r-4);
  padding: 48px 24px;
  text-align: center;
  background: var(--bg-stripe);
}
.empty__title { font-family: var(--font-display); font-size: var(--fs-h3); margin: 4px 0 6px; }
.empty__sub { color: var(--fg-secondary); font-size: var(--fs-body-s); max-width: 420px; margin: 0 auto; }

.skel { background: linear-gradient(90deg, var(--paper-200), var(--paper-300), var(--paper-200)); background-size: 200% 100%; animation: skel 1.4s linear infinite; border-radius: var(--r-1); }
@keyframes skel { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ============================================================
   FILTER BAR / SEARCH
   ============================================================ */
.filterbar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px;
  background: var(--paper-0);
  border: 1px solid var(--rule);
  border-radius: var(--r-4);
  flex-wrap: wrap;
}

.search {
  display: flex; align-items: center; gap: 8px;
  flex: 1; min-width: 200px;
  height: var(--input-h);
  padding: 0 12px;
  border: 1px solid var(--rule);
  background: var(--paper-0);
  border-radius: var(--r-2);
}
.search input {
  flex: 1;
  border: 0; background: transparent; outline: 0;
  font: inherit; font-size: var(--fs-body-s);
}
.search .kbd {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  color: var(--fg-tertiary);
  padding: 2px 6px;
  border: 1px solid var(--rule);
  border-radius: var(--r-1);
}

/* ============================================================
   FILE UPLOAD / DROPZONE
   ============================================================ */
.dropzone {
  border: 1px dashed var(--rule-strong);
  border-radius: var(--r-4);
  padding: 32px 24px;
  text-align: center;
  background: var(--bg-stripe);
  cursor: pointer;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.dropzone:hover { border-color: var(--accent); background: var(--paper-0); }

/* ============================================================
   SIDEBAR (the APP sidebar lives in v4; this is the light sidebar used for content filters / in-app nav)
   ============================================================ */
.nav-group { display: flex; flex-direction: column; gap: 2px; padding: 10px 0; }
.nav-group__label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-s);
  letter-spacing: var(--lt-label);
  text-transform: uppercase;
  color: var(--fg-tertiary);
  padding: 6px 12px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  font-size: var(--fs-body-s);
  color: var(--fg-primary);
  border-radius: var(--r-2);
  cursor: pointer;
}
.nav-item:hover { background: var(--bg-sunk); }
.nav-item.is-active { background: var(--bg-sunk); font-weight: 500; box-shadow: inset 2px 0 0 var(--accent); }

/* ============================================================
   CHART (wireframe-style)
   ============================================================ */
.chart { background: var(--paper-0); border: 1px solid var(--rule); border-radius: var(--r-4); padding: 16px; }
.chart svg { display: block; width: 100%; height: auto; }
.chart .axis { stroke: var(--rule); stroke-width: 1; }
.chart .grid { stroke: var(--rule-soft); stroke-width: 1; stroke-dasharray: 2 3; }
.chart .line { fill: none; stroke: var(--ink-800); stroke-width: 1.5; }
.chart .area { fill: var(--bg-sunk); }
.chart .bar  { fill: var(--ink-800); }
.chart .label { font-family: var(--font-mono); font-size: 10px; fill: var(--fg-tertiary); }

/* ============================================================
   UTILITY
   ============================================================ */
.hr { border: 0; border-top: 1px solid var(--rule); margin: 24px 0; }
.hr--dashed { border-top-style: dashed; }
.stack > * + * { margin-top: var(--gap-stack); }
.inline { display: inline-flex; gap: 8px; align-items: center; }
.row { display: flex; gap: 12px; align-items: center; }
.spacer { flex: 1; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ============================================================
   APP SHELL (dark sidebar + topbar — KEPT from v4)
   ============================================================ */
.shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
.shell__side {
  background: var(--ocean-900);
  color: var(--fg-on-dark);
  border-right: 1px solid var(--rule-on-dark);
  padding: 16px 12px;
  font-size: var(--fs-body-s);
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.shell__side .wm {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 20px;
  color: #fff;
  padding: 8px 10px 16px;
  letter-spacing: var(--lt-tight);
  border-bottom: 1px solid var(--rule-on-dark);
  margin-bottom: 12px;
}
.shell__side .wm::after { content: " ·"; color: var(--teal-400); }
.shell__side .nav-group__label { color: var(--fg-on-dark-dim); opacity: 0.7; }
.shell__side .nav-item { color: var(--fg-on-dark-dim); }
.shell__side .nav-item:hover { background: rgba(255,255,255,0.06); color: var(--fg-on-dark); }
.shell__side .nav-item.is-active {
  background: rgba(255,255,255,0.06);
  color: #fff;
  box-shadow: inset 2px 0 0 var(--teal-400);
}

.shell__top {
  height: 56px;
  background: var(--ocean-900);
  color: var(--fg-on-dark);
  display: flex; align-items: center; gap: 16px;
  padding: 0 20px;
  border-bottom: 1px solid var(--rule-on-dark);
  grid-column: 1 / -1;
  position: sticky; top: 0; z-index: var(--z-sticky);
}
.shell__top .crumb { color: var(--fg-on-dark-dim); font-size: var(--fs-body-s); }
.shell__top .crumb b { color: #fff; font-weight: 500; }
.shell__top .search {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--fg-on-dark-dim);
  max-width: 340px;
}
.shell__top .search input { color: var(--fg-on-dark); }
.shell__top .search input::placeholder { color: var(--fg-on-dark-dim); }
.shell__top .avatar { width: 28px; height: 28px; border-radius: 50%; background: #2A3446; border: 1px solid var(--rule-on-dark-str); margin-left: auto; }
.shell__main { background: var(--bg-canvas); padding: 32px; min-width: 0; }

/* The v4 shell has the topbar span full width — place topbar OUTSIDE .shell or re-grid */
.app {
  display: grid;
  grid-template-rows: 56px 1fr;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
.app > .shell__top { grid-column: 1 / -1; grid-row: 1; }
.app > .shell__side { grid-row: 2; grid-column: 1; }
.app > .shell__main { grid-row: 2; grid-column: 2; }