/*
 * CNG Design System — Foundations
 *
 * Phase 2A adds a deliberately small set of reusable core controls. Existing
 * page layout and card styles remain authoritative until migrated deliberately.
 *
 * Breakpoint convention (CSS custom properties cannot be used reliably in
 * media-query conditions): 520px / 760px / 1024px / 1280px.
 */

:root {
  color-scheme: dark;

  /* Color foundations */
  --cng-bg: #08080c;
  --cng-surface-1: #111118;
  --cng-surface-2: #181820;
  --cng-surface-raised: #20202a;
  --cng-border: #2a2935;
  --cng-border-strong: #444052;
  --cng-text: #f8f7fb;
  --cng-text-muted: #aaa7b5;
  --cng-text-subtle: #817b8d;
  --cng-brand-orange: #ff7a1a;
  --cng-brand-pink: #f13c9a;
  --cng-brand-violet: #7c3aed;
  --cng-success: #67d391;
  --cng-warning: #f7c85b;
  --cng-danger: #ff657f;
  --cng-info: #a66cff;

  /* Typography foundations */
  --cng-font-sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --cng-text-xs: 0.75rem;
  --cng-text-sm: 0.875rem;
  --cng-text-md: 1rem;
  --cng-text-lg: 1.125rem;
  --cng-text-xl: 1.375rem;
  --cng-text-2xl: clamp(1.75rem, 3vw, 2.5rem);
  --cng-text-display: clamp(2.5rem, 6vw, 5rem);
  --cng-weight-regular: 400;
  --cng-weight-medium: 500;
  --cng-weight-semibold: 600;
  --cng-weight-bold: 700;
  --cng-weight-black: 900;
  --cng-measure-readable: 65ch;

  /* Spacing foundations */
  --cng-space-1: 4px;
  --cng-space-2: 8px;
  --cng-space-3: 12px;
  --cng-space-4: 16px;
  --cng-space-6: 24px;
  --cng-space-8: 32px;
  --cng-space-12: 48px;
  --cng-space-16: 64px;

  /* Shape foundations */
  --cng-radius-sm: 8px;
  --cng-radius-md: 12px;
  --cng-radius-lg: 16px;
  --cng-radius-xl: 22px;
  --cng-radius-pill: 999px;

  /* Elevation is deliberately separate from semantic glow. */
  --cng-elevation-none: none;
  --cng-elevation-raised: 0 18px 55px rgba(0, 0, 0, 0.32);
  --cng-elevation-modal: 0 24px 90px rgba(0, 0, 0, 0.72);

  /* Shared application layers. Safety and policy gates always remain authoritative. */
  --cng-layer-popover: 4000;
  --cng-layer-dialog: 6000;
  --cng-layer-safety-gate: 10000;

  /* Brand moments and semantic LIVE / FOCUS / SELECTED emphasis only. */
  --cng-brand-gradient: linear-gradient(
    120deg,
    var(--cng-brand-orange),
    var(--cng-brand-pink),
    var(--cng-brand-violet)
  );
  --cng-glow-live: 0 0 16px rgba(255, 61, 114, 0.48);
  --cng-glow-focus: 0 0 0 3px rgba(224, 139, 255, 0.34);
  --cng-glow-selected: 0 0 24px rgba(166, 108, 255, 0.28);

  /* Content-width foundations. Theater geometry remains component-owned. */
  --cng-width-readable: 720px;
  --cng-width-normal: 960px;
  --cng-width-wide: 1200px;
  --cng-width-theater: 1800px;
}

/* Core controls */
.cng-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--cng-space-2);
  padding: 0 var(--cng-space-4);
  border: 1px solid transparent;
  border-radius: var(--cng-radius-md);
  font: var(--cng-weight-bold) var(--cng-text-sm)/1 var(--cng-font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, opacity 160ms ease;
}

.cng-button--sm { min-height: 36px; padding-inline: var(--cng-space-3); }
.cng-button--md { min-height: 44px; }
.cng-button--lg { min-height: 48px; padding-inline: var(--cng-space-6); }
.cng-button--primary { background: var(--cng-brand-gradient); color: #fff; }
.cng-button--secondary { border-color: var(--cng-border-strong); background: var(--cng-surface-2); color: var(--cng-text); }
.cng-button--ghost { border-color: transparent; background: transparent; color: var(--cng-text-muted); }
.cng-button--danger { border-color: #9f4059; background: #36131d; color: #ffbdca; }
.cng-button:hover:not(:disabled):not([aria-disabled="true"]) { filter: brightness(1.1); }
.cng-button--ghost:hover:not(:disabled):not([aria-disabled="true"]) { background: var(--cng-surface-2); color: var(--cng-text); }
.cng-button:disabled,
.cng-button[aria-disabled="true"],
.cng-button[aria-busy="true"] { opacity: 0.55; cursor: not-allowed; filter: none; }

.cng-icon-button {
  width: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
}

.cng-field { display: grid; gap: var(--cng-space-2); color: var(--cng-text); font-size: var(--cng-text-sm); font-weight: var(--cng-weight-semibold); }
.cng-input,
.cng-select,
.cng-textarea {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--cng-border);
  border-radius: var(--cng-radius-md);
  background: #0d0d13;
  color: var(--cng-text);
  font: var(--cng-weight-regular) var(--cng-text-md)/1.4 var(--cng-font-sans);
}
.cng-textarea { min-height: 112px; resize: vertical; }
.cng-input::placeholder,
.cng-textarea::placeholder { color: var(--cng-text-subtle); }
.cng-input:disabled,
.cng-select:disabled,
.cng-textarea:disabled { opacity: 0.58; cursor: not-allowed; }
.cng-input[aria-invalid="true"],
.cng-select[aria-invalid="true"],
.cng-textarea[aria-invalid="true"] { border-color: var(--cng-danger); }
.cng-field-help,
.cng-field-message { color: var(--cng-text-muted); font-size: var(--cng-text-xs); font-weight: var(--cng-weight-regular); }
.cng-field-message--error { color: #ff9eb1; }
.cng-field-message--success { color: #8fe1ad; }

.cng-check,
.cng-switch { display: inline-flex; align-items: center; gap: var(--cng-space-2); min-height: 44px; color: var(--cng-text); cursor: pointer; }
.cng-check input,
.cng-switch input { width: 18px; height: 18px; accent-color: var(--cng-brand-pink); }
.cng-switch input { appearance: none; width: 42px; height: 24px; border: 1px solid var(--cng-border-strong); border-radius: var(--cng-radius-pill); background: var(--cng-surface-2); transition: background-color 160ms ease; }
.cng-switch input::before { content: ""; display: block; width: 18px; height: 18px; margin: 2px; border-radius: 50%; background: var(--cng-text-muted); transition: transform 160ms ease; }
.cng-switch input:checked { border-color: var(--cng-brand-pink); background: var(--cng-brand-pink); }
.cng-switch input:checked::before { background: #fff; transform: translateX(18px); }

.cng-status-badge {
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 4px 8px;
  border: 1px solid var(--cng-border-strong);
  border-radius: var(--cng-radius-pill);
  background: var(--cng-surface-2);
  color: var(--cng-text-muted);
  font-size: var(--cng-text-xs);
  font-weight: var(--cng-weight-bold);
}
.cng-status-badge--success { border-color: #31875b; background: #102a1e; color: #8fe1ad; }
.cng-status-badge--warning { border-color: #9c7730; background: #33260f; color: #ffd986; }
.cng-status-badge--danger { border-color: #9f4059; background: #36131d; color: #ff9eb1; }
.cng-status-badge--info { border-color: #684391; background: #24172f; color: #e2c7ff; }
.cng-status-badge--live { border-color: #9f4059; background: #36131d; color: #ff9eb1; box-shadow: var(--cng-glow-live); }

.cng-tabs { display: flex; flex-wrap: wrap; gap: var(--cng-space-2); }
.cng-tab { min-height: 44px; padding: 0 var(--cng-space-4); border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: transparent; color: var(--cng-text-muted); font: var(--cng-weight-bold) var(--cng-text-sm)/1 var(--cng-font-sans); cursor: pointer; }
.cng-tab:hover { color: var(--cng-text); }
.cng-tab[aria-selected="true"],
.cng-tab.is-active { border-bottom-color: var(--cng-brand-pink); color: var(--cng-text); }

.cng-notice,
.cng-state { padding: var(--cng-space-4); border: 1px solid var(--cng-border); border-radius: var(--cng-radius-md); background: var(--cng-surface-1); color: var(--cng-text-muted); }
.cng-notice--info { border-color: #684391; }
.cng-notice--success { border-color: #31875b; color: #a6e8bd; }
.cng-notice--warning { border-color: #9c7730; color: #ffe0a0; }
.cng-notice--danger,
.cng-state--error { border-color: #9f4059; color: #ffb1c0; }
.cng-state { text-align: center; }
.cng-state:empty { display: none; }
.cng-state--empty { color: var(--cng-text-muted); }
.cng-state--loading { color: var(--cng-text-muted); }

/* Quiet workflow primitives for account and case-management surfaces. */
.cng-page-header {
  display: grid;
  gap: var(--cng-space-2);
  margin-bottom: var(--cng-space-6);
}
.cng-page-header > * { margin: 0; }
.cng-page-header__eyebrow {
  color: var(--cng-brand-pink);
  font-size: var(--cng-text-xs);
  font-weight: var(--cng-weight-bold);
  letter-spacing: 0.12em;
}
.cng-page-header > p:last-child { max-width: var(--cng-measure-readable); color: var(--cng-text-muted); }
.cng-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cng-space-4);
  margin-block: var(--cng-space-6) var(--cng-space-3);
}
.cng-section-header > * { margin: 0; }
.cng-case-list { display: grid; gap: var(--cng-space-3); }
.cng-case {
  padding: var(--cng-space-4);
  border: 1px solid var(--cng-border);
  border-radius: var(--cng-radius-lg);
  background: var(--cng-surface-1);
}
.cng-case__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--cng-space-3);
}
.cng-case__actions { display: flex; flex-wrap: wrap; gap: var(--cng-space-2); margin-top: var(--cng-space-4); }
.cng-data-list { margin: 0; border-block: 1px solid var(--cng-border); }
.cng-data-row {
  display: grid;
  grid-template-columns: minmax(128px, 0.32fr) minmax(0, 1fr);
  gap: var(--cng-space-4);
  padding-block: var(--cng-space-3);
  border-top: 1px solid var(--cng-border);
}
.cng-data-row:first-child { border-top: 0; }
.cng-data-row dt { color: var(--cng-text-subtle); font-size: var(--cng-text-sm); }
.cng-data-row dd { min-width: 0; margin: 0; color: var(--cng-text); overflow-wrap: anywhere; }
.cng-timeline { margin: 0; padding: 0 0 0 var(--cng-space-6); list-style: none; border-left: 1px solid var(--cng-border-strong); }
.cng-timeline__entry { position: relative; display: grid; gap: var(--cng-space-1); padding: 0 0 var(--cng-space-5); }
.cng-timeline__entry:last-child { padding-bottom: 0; }
.cng-timeline__entry::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: calc(-1 * var(--cng-space-6) - 4px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cng-border-strong);
}
.cng-timeline__entry time { color: var(--cng-text-subtle); font-size: var(--cng-text-xs); }
.cng-timeline__entry p { margin: 0; color: var(--cng-text-muted); }
.cng-form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--cng-space-3); }

@media (max-width: 520px) {
  .cng-button { min-height: 44px; }
  .cng-tabs { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
  .cng-case__header,
  .cng-section-header { align-items: stretch; flex-direction: column; }
  .cng-data-row { grid-template-columns: 1fr; gap: var(--cng-space-1); }
}

/* Universal accessibility primitives */
:where([hidden]) {
  display: none !important;
}

:where(:focus-visible) {
  outline: 3px solid #e08bff;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  padding: 12px 16px;
  border-radius: var(--cng-radius-sm);
  background: #fff;
  color: #111;
  transform: translateY(calc(-100% - 24px));
  transition: transform 160ms ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 12px;
  left: 12px;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}