/* P104: semantic palette owned by Presentes, enabled only on internal surfaces.
   Light fallbacks in styles.css preserve every existing guest/light color. */
html[data-theme="dark"][data-theme-surface="internal"] {
  color-scheme: dark;
  --canvas: #0f1a22;
  --surface: #1a2933;
  --panel: #1a2933;
  --soft: #233640;
  --ink: #edf5f7;
  --muted: #b2c4cb;
  --line: #324651;
  --accent: #65dfc5;
  --accent-strong: #91ecd8;
  --aqua: #193e40;
  --ok: #86e0af;
  --warn: #f6d486;
  --danger: #ffabab;
  --pink: #48303c;
  --peach: #493a32;
  --butter: #443c2a;
  --blue: #213b50;
  --surface-raised: #1a2933;
  --surface-subtle: #15242d;
  --surface-overlay: #233640;
  --field-surface: #15242d;
  --text-surface: #edf5f7;
  --text-subtle: #b2c4cb;
  --text-placeholder: #a6bbc4;
  --text-rose: #f4bad0;
  --text-danger: var(--danger);
  --text-warning: var(--warn);
  --text-success: var(--ok);
  --control-line: #728794;
  --focus-ring: #65dfc5;
  --success-soft: #193c30;
  --warning-soft: #3c3322;
  --danger-soft: #432b32;
  --rose-soft: #40303c;
  --info-soft: #213b50;
  --inverse-surface: #15212a;
  --shadow: 0 20px 55px rgba(0, 0, 0, .28);
  --soft-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}

/* Theme controls inherit the existing header/menu geometry. */
.top-actions > .theme-access {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  min-width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink);
  background: transparent;
}
.theme-access svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme-access .theme-sun { display: none; }
html[data-theme="dark"] .theme-access .theme-sun { display: block; }
html[data-theme="dark"] .theme-access .theme-moon { display: none; }
html[data-theme-surface="guest"] [data-theme-toggle] { display: none; }
[data-theme-toggle]:focus-visible { outline: 3px solid var(--focus-ring, #087d72); outline-offset: 2px; }
[data-theme-toggle] { transition: background-color 150ms ease, color 150ms ease; }
@media (prefers-reduced-motion: reduce) { [data-theme-toggle] { transition: none; } }

/* Conta follows the current-theme icon convention; access keeps its own control. */
.account-menu-panel [data-theme-toggle] { display: flex; align-items: center; justify-content: flex-start; gap: 12px; }
.account-menu-panel [data-theme-toggle] svg { width: 20px; height: 20px; flex: 0 0 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.account-menu-panel .account-theme-moon { display: none; }
html[data-theme="dark"] .account-menu-panel .account-theme-sun { display: none; }
html[data-theme="dark"] .account-menu-panel .account-theme-moon { display: block; }

/* The cascade contains historical compositions. These shared states resolve
   inverse text, control boundaries and focus without changing their geometry. */
html[data-theme="dark"][data-theme-surface="internal"] body {
  background: radial-gradient(circle at 92% 8%, rgba(0, 228, 151, .045), transparent 24rem), var(--canvas);
}
html[data-theme="dark"][data-theme-surface="internal"] .topbar {
  background: var(--panel);
  border-bottom-color: var(--line);
}
/* The access top stripe is a legacy document border, not browser chrome. */
html[data-theme="dark"][data-theme-surface="internal"] .page-mode-login:has(.auth-layout) .topbar { border-top-width: 0; }
html[data-theme="dark"][data-theme-surface="internal"] :is(.section-heading h2, .dialog-card h2, .brand strong, .auth-heading h1) { color: var(--ink); }
html[data-theme="dark"][data-theme-surface="internal"] #auth-form input:not([type="hidden"]),
html[data-theme="dark"][data-theme-surface="internal"] :is(input:not([type="checkbox"]):not([type="radio"]), select, textarea, .item-select .item-select-trigger) {
  color: var(--ink);
  background-color: var(--field-surface);
  border-color: var(--control-line);
}
html[data-theme="dark"][data-theme-surface="internal"] :is(input, textarea)::placeholder { color: var(--text-placeholder); opacity: 1; }
html[data-theme="dark"][data-theme-surface="internal"] :is(input, select, textarea, .item-select-trigger):disabled {
  color: var(--muted);
  background-color: var(--soft);
}
html[data-theme="dark"][data-theme-surface="internal"] :is(input, select, textarea)[aria-invalid="true"] { border-color: var(--danger) !important; }
html[data-theme="dark"][data-theme-surface="internal"] :is(button, a, summary, input, textarea, select, [tabindex]):focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}
html[data-theme="dark"][data-theme-surface="internal"] :is(.secondary-button, .google-button, .auth-switch .secondary-button):not(.page-mode-login .auth-card .google-button) {
  color: var(--ink);
  background: var(--surface-raised);
  border-color: var(--control-line);
}
html[data-theme="dark"][data-theme-surface="internal"] :is(.secondary-button, .google-button):not(.page-mode-login .auth-card .google-button):hover {
  color: var(--accent-strong);
  background: var(--aqua);
}
html[data-theme="dark"][data-theme-surface="internal"] .password-toggle { color: var(--muted); }
html[data-theme="dark"][data-theme-surface="internal"] .divider::before,
html[data-theme="dark"][data-theme-surface="internal"] .divider::after { background: var(--line); }
html[data-theme="dark"][data-theme-surface="internal"] .danger-button {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: var(--danger);
}
html[data-theme="dark"][data-theme-surface="internal"] .primary-button:disabled {
  background: var(--soft);
  color: var(--muted);
  border-color: var(--line);
}
html[data-theme="dark"][data-theme-surface="internal"] :is(.toast, .undo-notice) { background: var(--inverse-surface); color: #edf5f7; border-color: var(--control-line); }
html[data-theme="dark"][data-theme-surface="internal"] dialog::backdrop { background: rgba(0, 0, 0, .64); }