/**
 * @file
 * Base layer for the Basetheme (no base theme).
 *
 * Order:
 *   1. Design tokens
 *   2. Modern reset (removes browser default styling)
 *   3. Base element/typography defaults
 *   4. Minimal styling for core UI that would otherwise be unstyled with
 *      `base theme: false`: form elements, pager, local-task tabs, messages.
 *
 * All selectors below target the classes emitted by Drupal core's *system
 * module* default templates (verified against Drupal 10.3/11 core), except the
 * tab classes, which are restored by the template overrides in
 * templates/navigation/.
 */

/* ==========================================================================
   1. Design tokens
   ========================================================================== */
:root {
  --bt-container-width: 1200px;
  --bt-color-fg: #1a1a1a;
  --bt-color-bg: #ffffff;
  --bt-color-muted: #5b6470;
  --bt-color-border: #d4d8de;
  --bt-color-accent: #1b6ef3;
  --bt-color-accent-fg: #ffffff;

  /* Status colours (WCAG-AA text on the tinted backgrounds below). */
  --bt-color-status-bg: #eaf5ea;
  --bt-color-status-bd: #3f9142;
  --bt-color-warning-bg: #fdf6e3;
  --bt-color-warning-bd: #b8860b;
  --bt-color-error-bg: #fcecec;
  --bt-color-error-bd: #c0392b;

  --bt-space: 1rem;
  --bt-radius: 0.375rem;
  --bt-font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --bt-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* ==========================================================================
   2. Modern reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

/* Remove default margins; re-add deliberately below. */
html, body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  line-height: 1.15;
}

body {
  min-height: 100vh;
  font-family: var(--bt-font-body);
  font-size: 100%;
  line-height: 1.5;
  color: var(--bt-color-fg);
  background: var(--bt-color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Lists that are used for navigation lose their markers by default; content
   lists keep them (see typography section). */
ul[class], ol[class] { list-style: none; padding: 0; }

img, picture, svg, video, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

svg { fill: currentColor; }

/* Inherit fonts for form controls (browsers do not by default). */
input, button, textarea, select { font: inherit; color: inherit; }

/* Remove animations for users who request reduced motion. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   3. Base element / typography defaults
   ========================================================================== */
h1, h2, h3, h4, h5, h6 { line-height: 1.2; font-weight: 650; }
h1 { font-size: 2rem; margin-block: 0 0.5em; }
h2 { font-size: 1.5rem; margin-block: 1.2em 0.4em; }
h3 { font-size: 1.25rem; margin-block: 1em 0.35em; }

p, ul:not([class]), ol:not([class]), dl, blockquote, figure, table {
  margin-block: 0 var(--bt-space);
}
ul:not([class]), ol:not([class]) { padding-inline-start: 1.5em; }

a { color: var(--bt-color-accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration: none; }

code, pre, kbd, samp { font-family: var(--bt-font-mono); font-size: 0.9em; }
pre { padding: var(--bt-space); overflow: auto; background: #f5f6f8; border-radius: var(--bt-radius); }

hr { border: 0; border-top: 1px solid var(--bt-color-border); margin-block: var(--bt-space); }

table { border-collapse: collapse; width: 100%; }
th, td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--bt-color-border); text-align: start; }
th { font-weight: 650; }

:focus-visible { outline: 2px solid var(--bt-color-accent); outline-offset: 2px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* ==========================================================================
   4a. Form elements
   Hooks from core system template form-element.html.twig:
   .form-item, .form-item__label, .form-item__description, .form-item--error
   ========================================================================== */
.form-item { margin-block: 0 var(--bt-space); }

.form-item__label { display: inline-block; margin-block-end: 0.25rem; font-weight: 600; }
.form-item__label.form-required::after,
.form-required::after { content: " *"; color: var(--bt-color-error-bd); }

/* Target both the BEM .form-element class (when present) and raw controls,
   so styling holds whether or not a base theme added .form-element. */
.form-element,
input[type="text"], input[type="email"], input[type="url"], input[type="password"],
input[type="search"], input[type="tel"], input[type="number"], input[type="date"],
input[type="datetime-local"], input[type="month"], input[type="time"], input[type="week"],
textarea, select {
  width: 100%;
  max-width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--bt-color-border);
  border-radius: var(--bt-radius);
  background: #fff;
}
textarea { min-height: 6rem; resize: vertical; }

input[type="checkbox"], input[type="radio"] { width: auto; margin-inline-end: 0.4rem; }

.form-element:focus,
input:focus, textarea:focus, select:focus {
  border-color: var(--bt-color-accent);
  outline: 2px solid transparent;
  box-shadow: 0 0 0 3px rgba(27, 110, 243, 0.25);
}

.form-item__description { margin-block-start: 0.25rem; font-size: 0.85em; color: var(--bt-color-muted); }
.form-item--error .form-element,
.form-item--error input, .form-item--error textarea, .form-item--error select { border-color: var(--bt-color-error-bd); }
.form-item--error-message { color: var(--bt-color-error-bd); font-size: 0.85em; margin-block-start: 0.25rem; }

/* Buttons. Core adds .button to submit/button elements; raw fallback included. */
.button,
button, input[type="submit"], input[type="button"], input[type="reset"] {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--bt-color-accent);
  border-radius: var(--bt-radius);
  background: var(--bt-color-accent);
  color: var(--bt-color-accent-fg);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
}
.button:hover,
button:hover, input[type="submit"]:hover { filter: brightness(0.95); }
.button--secondary,
input[type="reset"] { background: transparent; color: var(--bt-color-accent); }
.button:disabled, button:disabled { opacity: 0.55; cursor: not-allowed; }

/* ==========================================================================
   4b. Pager
   Hooks from core system template pager.html.twig:
   .pager > .pager__items > .pager__item(.pager__item--first|previous|next|last)
   Current page: core marks it .is-active and the link carries aria-current.
   ========================================================================== */
.pager { margin-block: calc(var(--bt-space) * 1.5); }
.pager__items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
.pager__item { margin: 0; }
.pager__item a,
.pager__item.is-active > * {
  display: inline-flex;
  align-items: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.6rem;
  justify-content: center;
  border: 1px solid var(--bt-color-border);
  border-radius: var(--bt-radius);
  text-decoration: none;
  color: var(--bt-color-fg);
}
.pager__item a:hover { border-color: var(--bt-color-accent); }
.pager__item.is-active > *,
.pager__item [aria-current="page"] {
  background: var(--bt-color-accent);
  border-color: var(--bt-color-accent);
  color: var(--bt-color-accent-fg);
  font-weight: 600;
}

/* ==========================================================================
   4c. Local task tabs (primary/secondary)
   Core's system default emits a class-less <ul>, so the .tabs / .tabs__tab /
   .is-active hooks below are restored by templates/navigation/
   menu-local-tasks.html.twig and menu-local-task.html.twig.
   ========================================================================== */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin-block: 0 var(--bt-space);
  border-bottom: 1px solid var(--bt-color-border);
}
.tabs.secondary { border-bottom: 0; margin-block-start: 0.25rem; }

.tabs__tab { margin: 0; }
.tabs__tab a {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: var(--bt-radius) var(--bt-radius) 0 0;
  text-decoration: none;
  color: var(--bt-color-muted);
}
.tabs__tab a:hover { color: var(--bt-color-fg); background: #f5f6f8; }
.tabs__tab.is-active a {
  color: var(--bt-color-fg);
  background: var(--bt-color-bg);
  border-color: var(--bt-color-border);
  font-weight: 600;
}
.tabs.secondary .tabs__tab a { border-radius: 999px; border-bottom: 1px solid transparent; }
.tabs.secondary .tabs__tab.is-active a { border-color: var(--bt-color-border); }

/* ==========================================================================
   4d. Status messages
   Hooks from core system template status-messages.html.twig:
   .messages.messages--status | .messages--warning | .messages--error
   Multiple messages: .messages__list > .messages__item
   ========================================================================== */
.messages {
  margin-block: var(--bt-space);
  padding: 0.75rem 1rem;
  border: 1px solid var(--bt-color-border);
  border-inline-start-width: 4px;
  border-radius: var(--bt-radius);
  background: #f5f6f8;
}
.messages--status  { background: var(--bt-color-status-bg);  border-inline-start-color: var(--bt-color-status-bd); }
.messages--warning { background: var(--bt-color-warning-bg); border-inline-start-color: var(--bt-color-warning-bd); }
.messages--error   { background: var(--bt-color-error-bg);   border-inline-start-color: var(--bt-color-error-bd); }
.messages__list { margin: 0; padding-inline-start: 1.25rem; }
.messages__item { margin-block: 0.25rem; }
.messages + .messages { margin-block-start: 0.5rem; }