/* === Hyperbook Design System === */

:root {
  --color-brand: #007864;
  --color-brand-text: white;
  --color-background: white;
  --color-text: black;
  --color-text-deactivated: #242428;
  --color-nav: #f5f5f5;
  --color-nav-border: #3c3c3c;
  --color-spacer: #a4a4a4;
  --main-width: 980px;
  --header-height: 3.75rem;
  --element-gap: 1.5rem;
}

/* === Reset === */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  overflow: hidden;
  margin: 0;
  height: 100dvh;
  width: 100dvw;
}

body {
  overscroll-behavior-x: none;
  background-color: transparent;
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: normal;
  font-size: 1rem;
  line-height: 1.5;
}

a { color: var(--color-brand); }

/* === Main Grid Layout === */

.main-grid {
  background: var(--color-background);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  display: grid;
  position: fixed;
  left: 0; right: 0; top: 0; bottom: 0;
  grid-template-columns: 1fr;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-areas:
    "header"
    "article";
}

/* === Header === */

header {
  display: flex;
  grid-area: header;
  margin: 0; padding: 0;
  align-items: center;
  z-index: 1001;
  background: var(--color-brand);
  box-shadow: rgba(0, 0, 0, 0.24) 0px 1px 4px;
}

.branding {
  color: var(--color-brand-text);
  text-decoration: none;
  display: flex;
  padding: 1rem;
  align-items: center;
  flex: 1;
}

.branding .name {
  font-size: 1.1rem;
  font-weight: bold;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-right: 1.25rem;
}

.header-user {
  color: var(--color-brand-text);
  font-size: 0.9rem;
  font-weight: 500;
}

.header-link {
  color: var(--color-brand-text);
  text-decoration: none;
  font-size: 0.85rem;
  opacity: 0.85;
  transition: opacity 0.15s;
}

.header-link:hover { opacity: 1; text-decoration: underline; }

.header-sep {
  width: 1px;
  height: 1rem;
  background: rgba(255, 255, 255, 0.3);
}

/* === Main Content Area === */

main {
  grid-area: article;
  padding: 1rem;
  overflow-y: auto;
}

article {
  max-width: var(--main-width);
  margin: 0 auto;
}

/* === Breadcrumbs === */

nav.breadcrumb {
  max-width: var(--main-width);
  color: color-mix(in srgb, var(--color-text), white 35%);
  margin: 0 auto;
  margin-bottom: var(--element-gap);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.9rem;
}

.breadcrumb-current { font-weight: 500; }

.breadcrumb-item {
  color: color-mix(in srgb, var(--color-text), white 35%);
  text-decoration: none;
  cursor: pointer;
}

.breadcrumb-item:hover {
  color: var(--color-brand);
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 4px;
  color: color-mix(in srgb, var(--color-text), white 35%);
}

/* === Login === */

.login-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.login-card {
  background: var(--color-nav);
  border: 1px solid var(--color-spacer);
  padding: 32px;
  border-radius: 8px;
  width: 100%;
  max-width: 380px;
}

.login-card h2 {
  margin-bottom: 20px;
  text-align: center;
  font-weight: 600;
  font-size: 1.5em;
}

/* === Forms === */

.form-group { margin-bottom: 14px; }

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 0.9rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-spacer);
  border-radius: 4px;
  font-size: 0.95rem;
  background: var(--color-background);
  color: var(--color-text);
}

.form-group textarea { resize: vertical; min-height: 60px; }

/* === Buttons === */

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: opacity 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--color-brand); color: var(--color-brand-text); }
.btn-secondary { background: var(--color-nav); color: var(--color-text); border: 1px solid var(--color-spacer); }
.btn-danger { background: #d26466; color: #fff; }
.btn-impersonate { background: #f59e0b; color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-full { width: 100%; }

/* === Toolbar === */

.toolbar { display: flex; gap: 8px; margin-bottom: var(--element-gap); }

/* === Content Area === */

.content-area {
  background: var(--color-nav);
  border: 1px solid var(--color-spacer);
  border-radius: 8px;
  padding: 20px;
}

.loading { color: var(--color-text-deactivated); }
.empty { color: var(--color-text-deactivated); font-style: italic; }
.error { color: #d26466; margin-top: 8px; margin-bottom: 8px; }
.success { color: var(--color-brand); margin-top: 8px; margin-bottom: 8px; }

/* === Tables === */

.data-table { width: 100%; border-collapse: collapse; }

.data-table th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--color-spacer);
  font-size: 0.85rem;
  color: var(--color-text-deactivated);
  text-transform: uppercase;
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-spacer);
  vertical-align: middle;
}

.data-table tbody tr:hover { background: var(--color-background); }

.clickable-row { cursor: pointer; }
.actions { white-space: nowrap; text-align: right; }
.data-table th:last-child { text-align: right; }

/* === Modal === */

.modal {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-backdrop {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.5);
}

.modal-content {
  position: relative;
  background: var(--color-background);
  border: 1px solid var(--color-brand);
  border-radius: 8px;
  padding: 24px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  color: var(--color-text);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-header h3 { font-size: 1.1rem; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-deactivated);
}

.modal-close:hover { color: var(--color-brand); }

/* === Hints === */

.hint { font-size: 0.85rem; color: var(--color-text-deactivated); margin-bottom: 8px; }
.hint code { background: var(--color-nav); padding: 1px 4px; border-radius: 3px; }

/* === Permission Checkboxes === */

.perm-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  cursor: pointer;
}

.perm-checkbox input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; }

/* === Responsive === */

@media screen and (max-width: 640px) {
  main { padding: 0.75rem; }
  .content-area { padding: 12px; }
  .data-table th, .data-table td { padding: 8px 6px; font-size: 0.85rem; }
  .actions { flex-wrap: wrap; }
}