/* ================================================
   Hanscom FTC — Shared Design System
   ================================================ */

/* --- Custom Properties --- */
:root {
  /* Colors */
  --navy: #2c3e6b;
  --navy-hover: #3b5290;
  --navy-light: #d0ddf0;
  --navy-bg: #f0f4fa;
  --accent: #4a6fa5;
  --accent-ring: rgba(74, 111, 165, 0.15);

  --bg: #f0f2f5;
  --surface: #fff;
  --border: #dde1e6;
  --border-input: #ccd0d5;
  --input-bg: #fafbfc;
  --text: #1a1a2e;
  --text-secondary: #555;
  --text-muted: #888;
  --text-label: #555;

  --green: #28a745;
  --green-bg: #d4edda;
  --green-text: #155724;
  --red: #dc3545;
  --red-bg: #f8d7da;
  --red-text: #721c24;
  --yellow: #ffc107;
  --yellow-bg: #fff3cd;
  --yellow-text: #856404;
  --orange: #fd7e14;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;
  --fs-xs: 0.72rem;
  --fs-sm: 0.78rem;
  --fs-body: 0.85rem;
  --fs-md: 0.88rem;
  --fs-base: 0.9rem;
  --fs-lg: 1rem;
  --fs-xl: 1.05rem;
  --fs-2xl: 1.1rem;
  --fs-3xl: 1.4rem;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.18);
  --shadow-card: 0 1px 4px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-nav: 0 2px 6px rgba(0, 0, 0, 0.15);

  /* Borders */
  --radius: 8px;
  --radius-sm: 5px;
  --radius-lg: 10px;

  /* Transitions */
  --transition: 0.15s ease;
  --transition-slow: 0.25s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

/* --- Navbar --- */
.navbar {
  background: var(--navy);
  color: #fff;
  padding: 0.6rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-nav);
  position: relative;
  z-index: 100;
}

.navbar .brand {
  font-weight: 700;
  font-size: var(--fs-xl);
  margin-right: auto;
}

.navbar .zulu-clock {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  opacity: 0.9;
}

.navbar .user-info {
  font-size: var(--fs-body);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.role-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  font-weight: 600;
}

.navbar a {
  color: #fff;
  text-decoration: none;
  font-size: var(--fs-body);
  opacity: 0.9;
  transition: opacity var(--transition);
}

.navbar a:hover {
  opacity: 1;
  text-decoration: underline;
}

.btn-nav {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
}

.btn-nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* --- Layout --- */
.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--sp-5);
}

.content-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--sp-5);
}

.content-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--sp-5);
}

.row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.field {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 140px;
}

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-5);
  margin-bottom: var(--sp-4);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-slow);
}

.card h3 {
  font-size: var(--fs-lg);
  color: var(--navy);
  margin-bottom: 0.75rem;
}

/* --- Form Controls --- */
label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-label);
  display: block;
  margin-bottom: 0.25rem;
}

input[type="text"],
input[type="number"],
input[type="password"],
input[type="date"],
input[type="tel"],
select,
textarea {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-family: inherit;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-ring);
}

textarea {
  resize: vertical;
}

/* --- Fieldsets --- */
fieldset {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--sp-5);
  margin-bottom: var(--sp-4);
  box-shadow: var(--shadow-card);
}

legend {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0 0.5rem;
  color: var(--navy);
}

/* --- Buttons --- */
.btn-submit {
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 0.7rem 2.5rem;
  font-size: var(--fs-lg);
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition), transform 0.1s ease, box-shadow var(--transition);
}

.btn-submit:hover {
  background: var(--navy-hover);
  box-shadow: 0 2px 6px rgba(44, 62, 107, 0.25);
}

.btn-submit:active {
  transform: translateY(1px);
}

.btn-submit:disabled {
  background: #8899b5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-secondary {
  background: var(--surface);
  color: var(--navy);
  border: 1px solid var(--border-input);
  padding: 0.55rem 1.5rem;
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition), border-color var(--transition);
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.btn-danger {
  background: var(--surface);
  color: var(--red);
  border: 1px solid var(--red);
  padding: 0.55rem 1.5rem;
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
}

.btn-danger:hover {
  background: #fdf0f0;
}

.btn {
  padding: 0.35rem 0.8rem;
  border: none;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--navy);
  color: #fff;
}

.btn-primary:hover {
  background: var(--navy-hover);
}

.btn-success {
  background: var(--green);
  color: #fff;
}

.btn-success:hover {
  background: #2e9d5a;
}

.btn-warning {
  background: var(--yellow);
  color: #333;
}

.btn-warning:hover {
  background: #e0a800;
}

.btn-light {
  background: #e8f0fe;
  color: var(--navy);
}

.btn-light:hover {
  background: #d0e1fd;
}

/* --- Data Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-body);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.data-table th {
  text-align: left;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  padding: 0.6rem 0.75rem;
  background: #f8f9fa;
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #eee;
  transition: background var(--transition);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover td {
  background: #f6f8fb;
}

.data-table input,
.data-table select {
  padding: 0.3rem 0.4rem;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  font-size: 0.82rem;
  font-family: inherit;
  background: var(--input-bg);
}

.data-table input:focus,
.data-table select:focus {
  outline: none;
  border-color: var(--accent);
}

/* --- Badges --- */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
}

.badge-active {
  background: var(--green-bg);
  color: var(--green-text);
}

.badge-inactive {
  background: var(--red-bg);
  color: var(--red-text);
}

/* --- Modals --- */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 0;
  overflow-y: auto;
}

.modal-overlay.open {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  width: 95%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
  animation: slideDown 0.25s ease;
}

.modal h3 {
  margin-bottom: var(--sp-4);
  font-size: var(--fs-2xl);
  color: var(--navy);
}

.modal-close {
  float: right;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #666;
  line-height: 1;
  transition: color var(--transition);
}

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

.modal .field {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.75rem;
}

.modal label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.modal select,
.modal input[type="text"],
.modal input[type="number"],
.modal input[type="date"],
.modal textarea {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-family: inherit;
  background: var(--input-bg);
}

.modal input:focus,
.modal textarea:focus,
.modal select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-ring);
}

.modal .checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.modal .checkbox-row label {
  font-weight: 500;
  font-size: var(--fs-md);
  cursor: pointer;
}

/* Modal animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Info Grid --- */
.info-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 1rem;
  font-size: var(--fs-md);
}

.info-grid .lbl {
  color: var(--text-muted);
  font-weight: 500;
}

.info-grid .val {
  font-weight: 600;
}

/* --- Status Messages --- */
.status-msg {
  font-size: var(--fs-body);
  margin-top: 0.5rem;
  min-height: 1.2em;
}

.status-msg.error {
  color: #c0392b;
}

.status-msg.success {
  color: #27864e;
}

/* --- Empty State --- */
.empty-msg {
  color: var(--text-muted);
  font-size: var(--fs-base);
  padding: 1rem 0;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* --- Checkbox Row (shared) --- */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.checkbox-row input[type="checkbox"] {
  accent-color: var(--navy);
  transform: scale(1.1);
}

.checkbox-row label {
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0;
}

/* --- Utility --- */
.text-muted {
  color: var(--text-muted);
}

.text-center {
  text-align: center;
}

/* --- Focus Visible (keyboard accessibility) --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .navbar {
    padding: 0.5rem 0.75rem;
  }

  .content,
  .content-narrow,
  .content-wide {
    padding: 0.75rem;
  }

  .field {
    min-width: 100%;
  }

  .data-table {
    font-size: 0.78rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.4rem 0.5rem;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}