*, *::before, *::after { box-sizing: border-box; }

html {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

html, body {
  margin: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-underline-offset: 2px;
}

a:hover { color: var(--color-primary-hover); }

body.samc-app,
body.page-admission,
body.page-login {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.samc-chrome {
  position: sticky;
  top: 0;
  z-index: 4000;
  flex-shrink: 0;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 8px 24px rgba(21, 32, 51, 0.06);
}

.samc-chrome-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 20px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  flex-wrap: wrap;
}

.samc-chrome-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

.samc-chrome-brand:hover { color: inherit; }

.samc-chrome-logo {
  flex-shrink: 0;
  width: auto;
  height: 64px;
  display: block;
  object-fit: contain;
}

.samc-chrome-titles {
  display: grid;
  gap: 0;
  min-width: 0;
}

.samc-chrome-name {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-primary);
  line-height: 1.15;
}

.samc-chrome-software {
  font-size: 11px;
  color: var(--color-muted);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: min(52vw, 420px);
}

.samc-chrome-page {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.25;
}

.samc-chrome-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
  margin-left: auto;
}

.samc-chrome-user {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.15;
  padding: 0 6px;
  color: var(--color-text);
}

.samc-chrome-user-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.samc-chrome-user strong {
  font-size: 13px;
  font-weight: 650;
}

.samc-chrome-btn {
  appearance: none;
  height: 36px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.samc-chrome-ghost {
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-primary);
}

a.samc-chrome-ghost:hover,
button.samc-chrome-ghost:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
}

.samc-chrome-danger {
  border: 0;
  background: var(--color-danger);
  color: #fff;
}

.samc-chrome-danger:hover { filter: brightness(0.92); color: #fff; }

.samc-page {
  flex: 1 1 auto;
  width: 100%;
}

.site-footer {
  flex-shrink: 0;
  margin-top: auto;
  padding: 22px 16px calc(28px + env(safe-area-inset-bottom, 0px));
  background: transparent;
}

.site-footer-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.site-footer-dev,
.site-footer-soft {
  margin: 0;
  color: var(--color-muted);
}

.site-footer-dev {
  font-size: 13px;
  font-weight: 500;
}

.site-footer-soft {
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.01em;
}

.site-footer a {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 35%, transparent);
}

.site-footer a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: var(--color-primary-hover);
}

body.dark-mode .samc-chrome {
  background: color-mix(in srgb, #151b24 90%, transparent);
  border-bottom-color: #2a3545;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

body.dark-mode .samc-chrome-page,
body.dark-mode .samc-chrome-user { color: #e8eef5; }

body.dark-mode .samc-chrome-ghost {
  background: #1d2633;
  border-color: #334155;
  color: #8ec5ff;
}

@media (max-width: 720px) {
  .samc-chrome-inner {
    padding: calc(8px + env(safe-area-inset-top, 0px)) 14px 8px;
  }

  .samc-chrome-logo {
    height: 48px;
  }

  .samc-chrome-software { display: none; }

  .samc-chrome-user-label { display: none; }

  .samc-chrome-user {
    flex-direction: row;
    align-items: center;
    gap: 6px;
  }

  .samc-chrome-btn { height: 34px; padding: 0 10px; font-size: 12px; }
}

@media (max-width: 420px) {
  .samc-chrome-user { display: none; }
}

@media print {
  .samc-chrome,
  .site-footer {
    display: none !important;
  }
}