/**
 * BK ClinicQ: the shared component library (Issue 5).
 *
 * Button, theme toggle, card, badge, empty state, spinner, toast and skeleton: the pieces every layout
 * (patient, dashboard, board) and the kernel console build screens from. They were in admin.css,
 * which only the console loads; they moved here unchanged so the patient pages and the board get
 * the same button rather than a copy of it. The Jinja macros that render them are in
 * src/templates/components/, and /dev/components shows each one in development.
 *
 * Tokens only: every colour, radius and shadow is a ``var(--token)`` from site.css, so a
 * component follows the light and dark themes with no rule of its own.
 * tests/unit/platform/test_ui_shell.py fails on a colour literal in this file.
 */

/* ── Buttons ────────────────────────────────────────────────── */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: var(--tap);
  padding: 0 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--brand); color: var(--on-brand);
  font: inherit; font-size: .9375rem; font-weight: 500;
  cursor: pointer;
  transition: background .15s ease, box-shadow .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { background: var(--brand-hover); box-shadow: var(--shadow-icon); }
.btn:disabled { opacity: .6; cursor: not-allowed; box-shadow: none; }
.btn[hidden] { display: none; }
.btn-quiet { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-quiet:hover { background: var(--surface); border-color: var(--brand); color: var(--brand-deep); box-shadow: none; }
.btn-danger { background: var(--danger); color: var(--on-danger); }
.btn-danger:hover { background: var(--danger-deep); box-shadow: none; }
.btn-sm { min-height: 2.1rem; padding: 0 .85rem; font-size: .85rem; }
/* An icon-only button (e.g. the View eye): square, with the glyph centred. */
.btn-icon { padding: 0; width: 2.1rem; }
.btn-icon svg { width: 1.15rem; height: 1.15rem; }
.btn .btn-ico { width: 1rem; height: 1rem; }
/* A full-width button: the patient layout's one primary action per screen. */
.btn-block { width: 100%; }

/* ── Theme toggle ───────────────────────────────────────────── */

/* Theme toggle (Issue 97): a quiet round icon button in the top corner. The icon shows the
   theme you would switch *to* (a moon in light, a sun in dark), following both the OS
   preference and an explicit override. */
.theme-toggle {
  display: grid;
  place-items: center;
  width: var(--tap);
  height: var(--tap);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.theme-toggle:hover { color: var(--brand-deep); border-color: var(--brand); background: var(--bg-soft); }
.theme-toggle svg { width: 1.2rem; height: 1.2rem; }
/* Default (light): show the moon. Dark (by choice or OS) shows the sun. */
.theme-icon-sun { display: none; }
.theme-icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-icon-moon { display: none; }
}
:root[data-theme="dark"] .theme-icon-sun { display: block; }
:root[data-theme="dark"] .theme-icon-moon { display: none; }
:root[data-theme="light"] .theme-icon-sun { display: none; }
:root[data-theme="light"] .theme-icon-moon { display: block; }

/* ── Cards ──────────────────────────────────────────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  box-shadow: var(--shadow-card);
}
.card[hidden] { display: none; }
/* Headings/subtitles style the same whether at the card root or nested in a detail panel. */
.card h2 { font-size: 1.125rem; margin-bottom: .35rem; }
.card-sub { color: var(--muted); font-size: .9rem; margin-bottom: 1.1rem; }

/* ── Badges ─────────────────────────────────────────────────── */

.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .15rem .55rem;
  border-radius: var(--radius-pill);
  font-size: .75rem; font-weight: 500;
  background: var(--bg-soft); color: var(--muted);
}
.badge-ok { background: var(--brand-soft); color: var(--brand-deep); }
.badge-warn { background: var(--warn-bg); color: var(--warn-ink); }
.badge-danger { background: var(--danger-soft); color: var(--danger-ink); }
.badge-muted { background: var(--bg-soft); color: var(--muted); }
.badge-current { background: var(--brand); color: var(--on-brand); }

/* ── Empty state and spinner ────────────────────────────────── */

.empty-state { padding: 2.5rem 1rem; text-align: center; color: var(--muted); }
.empty-state svg { width: 2.25rem; height: 2.25rem; color: var(--line); margin-bottom: .5rem; }
.empty-state-title { color: var(--ink); font-weight: 600; }
.empty-state-body { margin-top: .25rem; }
.empty-state .btn { margin-top: 1rem; }

.spinner {
  display: inline-block;
  width: 1rem; height: 1rem;
  border: 2px solid var(--line);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: bkp-spin .7s linear infinite;
  vertical-align: -.15rem;
}
@keyframes bkp-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

/* ── htmx request indicator ─────────────────────────────────────
   htmx would inject these two rules as an inline <style>, which the CSP blocks; base.html turns
   that off (htmx-config includeIndicatorStyles: false) and they live here instead. An element
   with class htmx-indicator shows only while its request is in flight. */
.htmx-indicator { opacity: 0; transition: opacity .2s ease-in; }
.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator { opacity: 1; }

/* ── Toasts ─────────────────────────────────────────────────── */

.toast-stack { position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%); z-index: var(--z-toast); display: flex; flex-direction: column; gap: .5rem; width: min(24rem, calc(100vw - 2rem)); }
.toast {
  display: flex; align-items: center; gap: .6rem;
  padding: .7rem .75rem .7rem 1rem; border-radius: 12px;
  background: var(--ink); color: var(--surface); font-size: .875rem; box-shadow: var(--shadow);
  transition: opacity .18s ease, transform .18s ease;
}
.toast-text { flex: 1; }
.toast-error { background: var(--danger); color: var(--on-danger); }
.toast-ok { background: var(--brand); color: var(--on-brand); }
/* An inline action (e.g. Undo) and the dismiss control on a toast. */
.toast-action {
  flex: none; border: 0; border-radius: 8px; padding: .25rem .6rem;
  background: var(--on-fill-wash); color: inherit; font: inherit; font-weight: 600; cursor: pointer;
}
.toast-action:hover { background: var(--on-fill-wash-strong); }
.toast-x {
  flex: none; display: grid; place-items: center; width: 1.5rem; height: 1.5rem;
  border: 0; border-radius: var(--radius-pill); background: none; color: inherit; opacity: .8; cursor: pointer;
}
.toast-x svg { width: .95rem; height: .95rem; }
.toast-x:hover { opacity: 1; background: var(--on-fill-wash); }
/* Enter/leave transitions: a toast slides up on show and fades on dismiss. */
.toast-enter, .toast-leave { opacity: 0; transform: translateY(.5rem); }
@media (prefers-reduced-motion: reduce) {
  .toast { transition: none; }
  .toast-enter, .toast-leave { transform: none; }
}

/* ── Skeleton loading ─────────────────────────────────────────
   Shimmering placeholders shown while data loads, so a screen never flashes an empty table or a
   bare "Loading…" line (Issue #111). */
.skeleton-line {
  display: block; height: .85rem; border-radius: 6px;
  background: linear-gradient(90deg,
    var(--bg-soft) 25%, color-mix(in srgb, var(--line) 55%, var(--bg-soft)) 37%, var(--bg-soft) 63%);
  background-size: 400% 100%;
  animation: bkp-shimmer 1.4s ease infinite;
}
.skeleton-line + .skeleton-line { margin-top: .6rem; }
.skeleton-line.is-short { width: 60%; }
@keyframes bkp-shimmer { from { background-position: 100% 0; } to { background-position: 0 0; } }
@media (prefers-reduced-motion: reduce) { .skeleton-line { animation: none; } }

/* ── Patient sign-in by phone (Issue 200) or email (Issue 219) ───
   templates/patient/_sign_in.html, on the join page and the installed app's start page. */

.sign-in-form { display: grid; gap: var(--space-2); min-width: 0; }
.sign-in-form fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.sign-in-form legend { margin-bottom: var(--space-2); padding: 0; font-weight: 600; }
.sign-in-label { display: block; font-weight: 600; }
.sign-in-input {
  width: 100%;
  min-width: 0;
  min-height: var(--tap);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}
.sign-in-input:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.sign-in-code { letter-spacing: .3em; font-variant-numeric: tabular-nums; }
.sign-in-again { display: grid; gap: var(--space-2); margin-top: var(--space-3); }
.sign-in-note { margin-top: var(--space-3); font-size: var(--step--1); color: var(--muted); }
.sign-in-error {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--danger-ink);
  border-radius: var(--radius);
  background: var(--danger-soft);
  color: var(--ink);
}
.sign-in-step h2:focus { outline: none; }
.sign-in-step h2:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* The two ways in, rendered only where PATIENT_EMAIL_SIGN_IN_ENABLED is on (Issue 219). Two equal
   halves at any width — there are exactly two and neither is a secondary action — so nothing has to
   wrap or scroll on a 320 px screen. */
.sign-in-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin: var(--space-3) 0 var(--space-4);
}
.sign-in-tab {
  min-height: var(--tap);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.sign-in-tab[aria-selected="true"] {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--ink);
}
.sign-in-tab:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }