/*
 * EW University design system — single source of brand truth for BOTH the
 * participant/admin platform and the certificate generator.
 *
 * Load this file BEFORE platform.css / styles.css. Page stylesheets consume
 * these tokens; they do not define their own brand colors.
 *
 * Brand palette:
 *   --ewu-blue  #1666a0  primary actions, links, emphasis
 *   --ewu-slate #576774  secondary text (AA on white)
 *   --ewu-teal  #4e9eb9  accents, decorative only (NOT body text — fails AA)
 *   --ewu-mist  #e8edf7  soft backgrounds, pills, panels
 */

:root {
  /* Brand */
  --ewu-blue: #1666a0;
  --ewu-blue-dark: #0f4f7e;   /* hover/active; AA-safe on white */
  --ewu-slate: #576774;
  --ewu-teal: #4e9eb9;
  --ewu-teal-soft: #e3f0f5;
  --ewu-mist: #e8edf7;

  /* Neutrals */
  --ewu-ink: #1f2a33;         /* primary text */
  --ewu-paper: #f7f9fc;       /* page background */
  --ewu-panel: #ffffff;
  --ewu-line: rgba(87, 103, 116, .22);

  /* Semantic */
  --ewu-success: #1f7a4f;
  --ewu-success-soft: #e3f2ea;
  --ewu-danger: #b54747;
  --ewu-danger-soft: #f8e9e9;
  --ewu-warning: #8a6116;
  --ewu-warning-soft: #f7efdd;

  /* Type & shape */
  --ewu-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ewu-radius-lg: 24px;
  --ewu-radius-md: 14px;
  --ewu-radius-pill: 999px;
  --ewu-shadow-card: rgba(19, 19, 22, .7) 0 1px 5px -4px, rgba(34, 42, 53, .08) 0 0 0 1px, rgba(34, 42, 53, .05) 0 4px 8px;

  /* Focus ring — shared across every interactive element */
  --ewu-focus-ring: 0 0 0 3px #fff, 0 0 0 6px var(--ewu-blue);
}

/* The hidden attribute must win over component display rules (e.g. flex). */
[hidden] { display: none !important; }

/* Visible keyboard focus everywhere, without doubling up on mouse clicks. */
:focus-visible {
  outline: none;
  box-shadow: var(--ewu-focus-ring);
  border-radius: 6px;
}

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

/* ------------------------------------------------------------------ */
/* Unified site header (participant, admin, and certificate pages)     */
/* ------------------------------------------------------------------ */

.site-header {
  background: var(--ewu-panel);
  border-bottom: 1px solid var(--ewu-line);
}

.site-nav {
  width: min(1180px, calc(100vw - 32px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 8px 0;
}

.site-nav .brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -.03em;
  text-decoration: none;
  font-size: 1.1rem;
  color: var(--ewu-ink);
}

.site-nav .brand-mark img { width: 36px; height: 36px; object-fit: contain; }

.site-nav .brand-mark .brand-sub {
  display: block;
  font-size: .72rem;
  font-weight: 700;
  color: var(--ewu-slate);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.site-nav-links a {
  text-decoration: none;
  color: var(--ewu-slate);
  font-weight: 650;
  font-size: .93rem;
  padding: 8px 14px;
  border-radius: var(--ewu-radius-pill);
}

.site-nav-links a:hover { color: var(--ewu-blue-dark); background: var(--ewu-mist); }

.site-nav-links a[aria-current="page"] {
  color: var(--ewu-blue-dark);
  background: var(--ewu-mist);
}

/* ------------------------------------------------------------------ */
/* Badges & chips                                                       */
/* ------------------------------------------------------------------ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 26px;
  padding: 2px 10px;
  border-radius: var(--ewu-radius-pill);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  background: var(--ewu-mist);
  color: var(--ewu-blue-dark);
  white-space: nowrap;
}

.badge.ce { background: var(--ewu-mist); color: var(--ewu-blue-dark); }
.badge.internal { background: var(--ewu-teal-soft); color: #2f6b81; }

/* Marks UI that is demonstrable now but wires up in Phase 2. */
.badge.phase2 {
  background: var(--ewu-warning-soft);
  color: var(--ewu-warning);
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 11px;
  border-radius: var(--ewu-radius-pill);
  background: var(--ewu-mist);
  color: var(--ewu-slate);
  font-size: .78rem;
  font-weight: 750;
  white-space: nowrap;
}

.chip.success { background: var(--ewu-success-soft); color: var(--ewu-success); }
.chip.danger { background: var(--ewu-danger-soft); color: var(--ewu-danger); }
.chip.warning { background: var(--ewu-warning-soft); color: var(--ewu-warning); }
.chip.info { background: var(--ewu-mist); color: var(--ewu-blue-dark); }

/* ------------------------------------------------------------------ */
/* Empty states                                                         */
/* ------------------------------------------------------------------ */

.empty-state {
  padding: 28px 24px;
  border-radius: var(--ewu-radius-md);
  background: var(--ewu-mist);
  color: var(--ewu-slate);
  text-align: center;
  line-height: 1.6;
}

/* ------------------------------------------------------------------ */
/* Toggle switch (roster certificate toggle)                            */
/* ------------------------------------------------------------------ */

.switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 44px;
  height: 24px;
  margin: 0;
  cursor: pointer;
}

.switch .track {
  width: 44px;
  height: 24px;
  flex: 0 0 44px;
  border-radius: var(--ewu-radius-pill);
  background: var(--ewu-line);
  position: relative;
  transition: background .15s ease;
}

.switch .track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(31, 42, 51, .35);
  transition: transform .15s ease;
}

.switch input:checked + .track { background: var(--ewu-blue); }
.switch input:checked + .track::after { transform: translateX(20px); }
.switch input:focus-visible + .track { box-shadow: var(--ewu-focus-ring); }