/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body { line-height: 1.5; -webkit-font-smoothing: antialiased; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

/* ─── Design Tokens ─── */
:root {
  --color-primary: #1E40AF;
  --color-primary-hover: #1E3A8A;
  --color-primary-light: #3B82F6;
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-text: #0F172A;
  --color-text-secondary: #64748B;
  --color-text-tertiary: #94A3B8;
  --color-accent-light: #DBEAFE;
  --color-border: #E2E8F0;
  --color-border-strong: #CBD5E1;
  --color-success: #22C55E;
  --color-success-bg: #F0FDF4;
  --color-success-border: #BBF7D0;
  --color-error: #EF4444;
  --color-error-bg: #FEF2F2;
  --color-error-border: #FECACA;
  --color-warning: #F59E0B;
  --color-warning-bg: #FFFBEB;
  --color-warning-border: #FDE68A;
  --color-info-bg: #EFF6FF;
  --color-info-border: #BFDBFE;
  --color-hover: #F0F4FF;
  --color-focus-ring: rgba(30, 64, 175, 0.35);

  --font-display: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  --nav-height: 56px;
  --sidebar-width: 240px;
}

/* ─── Base ─── */
body {
  font-family: var(--font-display);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ─── Typography ─── */
h1 { font-size: 30px; font-weight: 700; line-height: 1.2; letter-spacing: -0.025em; color: var(--color-text); }
h2 { font-size: 24px; font-weight: 700; line-height: 1.25; letter-spacing: -0.02em; color: var(--color-text); }
h3 { font-size: 20px; font-weight: 600; line-height: 1.3; color: var(--color-text); }
h4 { font-size: 16px; font-weight: 600; line-height: 1.4; color: var(--color-text); }
h5 { font-size: 14px; font-weight: 600; line-height: 1.4; color: var(--color-text); }
h6 { font-size: 13px; font-weight: 600; line-height: 1.5; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }

.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-small { font-size: 13px; line-height: 1.5; }
.text-mono { font-family: var(--font-mono); font-size: 13px; }

/* ─── Forms ─── */
label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

label .label-hint {
  font-weight: 400;
  color: var(--color-text-tertiary);
  font-size: 13px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="search"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
  transition: border-color 150ms ease, box-shadow 150ms ease;
  outline: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-tertiary);
}

input:disabled,
textarea:disabled,
select:disabled {
  background: var(--color-bg);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
}

textarea {
  min-height: 80px;
  resize: vertical;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748B' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 6l3.5 4 3.5-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-help {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.form-error-text {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-error);
}

.form-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.form-row > * {
  flex: 1;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all 150ms ease;
  text-decoration: none;
  white-space: nowrap;
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-hover);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.btn-danger {
  background: var(--color-error);
  color: #FFFFFF;
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  border-color: #DC2626;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
  padding: 8px 12px;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-hover);
  color: var(--color-text);
  text-decoration: none;
}

.btn-google {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  font-weight: 500;
}

.btn-google:hover:not(:disabled) {
  background: #F8FAFC;
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ─── Cards ─── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.card-padded {
  padding: 24px;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.card-body {
  padding: 24px;
}

.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.card:hover .card-hover-effect {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

/* ─── Tables ─── */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead {
  background: var(--color-bg);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: middle;
}

tbody tr:last-child td {
  border-bottom: none;
}

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

tbody tr:nth-child(even) {
  background: var(--color-bg);
}

tbody tr:nth-child(even):hover {
  background: var(--color-hover);
}

/* ─── Badges / Pills ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.badge-default {
  background: #F1F5F9;
  color: var(--color-text-secondary);
}

.badge-primary {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-bg);
  color: #16A34A;
}

.badge-error {
  background: var(--color-error-bg);
  color: #DC2626;
}

.badge-warning {
  background: var(--color-warning-bg);
  color: #D97706;
}

/* ─── Alerts ─── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  border: 1px solid;
}

.alert-info {
  background: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: var(--color-primary);
}

.alert-success {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: #16A34A;
}

.alert-warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: #D97706;
}

.alert-error {
  background: var(--color-error-bg);
  border-color: var(--color-error-border);
  color: #DC2626;
}

/* ─── Navigation Bar ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-height);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  padding: 0 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.nav-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  color: rgba(255, 255, 255, 0.8);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all 150ms ease;
  text-decoration: none;
}

.nav-link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.12);
  text-decoration: none;
}

.nav-link.active {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.18);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
  font-size: 14px;
}

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #FFFFFF;
}

.nav-user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-user-name {
  font-weight: 600;
  font-size: 14px;
}

.nav-user-org {
  font-size: 12px;
  opacity: 0.7;
}

/* ─── Sidebar ─── */
.sidebar {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 12px;
  overflow-y: auto;
  z-index: 30;
}

.sidebar-section {
  margin-bottom: 24px;
}

.sidebar-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0 12px;
  margin-bottom: 6px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 120ms ease;
}

.sidebar-link:hover {
  background: var(--color-hover);
  color: var(--color-text);
  text-decoration: none;
}

.sidebar-link.active {
  background: var(--color-accent-light);
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-link-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0.6;
}

.sidebar-link.active .sidebar-link-icon {
  opacity: 1;
}

/* ─── Layout: Dashboard ─── */
.dashboard-layout {
  display: flex;
  min-height: calc(100vh - var(--nav-height));
}

.dashboard-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px 40px;
  max-width: calc(100% - var(--sidebar-width));
  min-height: calc(100vh - var(--nav-height));
}

.dashboard-header {
  margin-bottom: 28px;
}

.dashboard-header h1 {
  font-size: 26px;
}

/* ─── Layout: Public (centered) ─── */
.public-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: var(--color-bg);
}

.public-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px;
}

.public-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.public-logo:hover {
  text-decoration: none;
}

.public-logo-mark {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
}

.public-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.public-footer a {
  color: var(--color-text-secondary);
}

/* ─── Utilities ─── */
.hidden { display: none !important; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: 4px; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 24px; }
.gap-xl { gap: 32px; }

.mt-xs { margin-top: 4px; }
.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mt-xl { margin-top: 32px; }
.mt-2xl { margin-top: 48px; }
.mb-xs { margin-bottom: 4px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }
.mb-xl { margin-bottom: 40px; }
.mb-2xl { margin-bottom: 56px; }

.w-full { width: 100%; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-mono { font-family: var(--font-mono); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Grid ─── */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ─── Divider ─── */
.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
  color: var(--color-text-tertiary);
  font-size: 13px;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: 40px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 {
  color: var(--color-text);
  margin-bottom: 8px;
}

.empty-state p {
  max-width: 360px;
  margin: 0 auto;
  font-size: 14px;
  color: var(--color-text-tertiary);
}

/* ─── Loading ─── */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

.loading-spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-skeleton {
  background: linear-gradient(90deg, #F1F5F9 25%, #E2E8F0 50%, #F1F5F9 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
  height: 16px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ─── Toast Notifications ─── */
.toast-container {
  position: fixed;
  top: calc(var(--nav-height) + 16px);
  right: 16px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 420px;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  animation: toast-in 250ms ease;
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-error); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-info { border-left: 3px solid var(--color-primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(24px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast-close {
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: 0;
  font-size: 18px;
  line-height: 1;
  margin-left: auto;
  flex-shrink: 0;
}

/* ─── Stat Card ─── */
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text);
}

.stat-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }
  .dashboard-main {
    margin-left: 0;
    max-width: 100%;
    padding: 24px 20px;
  }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav { padding: 0 16px; }
  .nav-links { display: none; }
  .nav-user-info { display: none; }
  .public-card { padding: 28px 24px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  h1 { font-size: 24px; }
  h2 { font-size: 20px; }
}

@media (max-width: 480px) {
  .public-card {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }
  .btn-lg { padding: 12px 20px; font-size: 15px; }
}

/* ─── Mobile Nav ─── */

/* Hamburger toggle button — hidden on desktop */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  color: #FFFFFF;
  cursor: pointer;
  padding: 6px;
  margin-left: 8px;
  transition: background 150ms ease;
}

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

/* Backdrop overlay */
.mobile-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 35;
  background: rgba(0, 0, 0, 0.45);
}

/* Slide-out drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(var(--sidebar-width), 85vw);
  z-index: 36;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 12px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-lg);
}

/* Open state */
body.mobile-nav-open .mobile-nav-backdrop {
  display: block;
}

body.mobile-nav-open .mobile-nav-drawer {
  transform: translateX(0);
}

/* Show hamburger and drawer only below 1024px */
@media (max-width: 1024px) {
  .mobile-nav-toggle {
    display: flex;
  }

  .mobile-nav-drawer {
    display: block;
  }

  /* Close button inside drawer */
  .mobile-nav-close {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-bottom: 16px;
  }

  .mobile-nav-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: background 150ms ease;
  }

  .mobile-nav-close-btn:hover {
    background: var(--color-hover);
    color: var(--color-text);
  }
}