/* Site layout: header, flash messages, forms */

/* Site header */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header__brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.site-header__link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.site-header__link:hover {
  background: var(--color-bg);
  color: var(--color-primary-hover);
}

/* Hamburger toggle (mobile only) */

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 10px;
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.site-header__toggle:hover {
  background: var(--color-bg);
}

.site-header__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 1px;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 640px) {
  .site-header__inner {
    flex-wrap: wrap;
    gap: 0;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding-top: 12px;
  }

  .site-header__nav--open {
    display: flex;
  }

  .site-header__link {
    padding: 10px 12px;
  }
}

/* Main content wrapper */

.site-main {
  padding-bottom: 32px;
}

/* Flash messages */

.flash {
  max-width: 720px;
  margin: 20px auto 0;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.flash--notice {
  background: #ecfdf5;
  color: #065f46;
  border-color: #a7f3d0;
}

.flash--alert {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fecaca;
}

/* User form */

.user-form {
  max-width: 440px;
  margin: 32px auto;
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.user-form h1 {
  margin: 0 0 24px;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
}

.user-form__field {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.user-form__field label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.user-form__field input {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.user-form__field input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.user-form__errors {
  margin-bottom: 20px;
  padding: 14px 16px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #991b1b;
}

.user-form__errors ul {
  margin: 0;
  padding-left: 20px;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .user-form {
    margin: 16px;
    padding: 24px;
  }
}