doctor-appointment-system/public/css/app.css

:root {
  --app-primary: #0d9488;
  --app-primary-dark: #0f766e;
  --app-primary-light: #ccfbf1;
  --app-accent: #0284c7;
  --app-surface: #ffffff;
  --app-page-bg: #f0fdfa;
  --app-text: #134e4a;
  --app-text-muted: #5f7a78;
  --app-border: #99f6e4;
  --app-radius: 14px;
  --app-shadow: 0 0.5rem 1.25rem rgba(15, 23, 42, 0.08);
  --app-shadow-lg: 0 1rem 2rem rgba(15, 23, 42, 0.1);
}

body.app-body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--app-text);
  margin: 0;
}

.app-page--auth {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(160deg, #e0f2fe 0%, #ccfbf1 40%, #f0fdfa 100%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  border: none !important;
  border-radius: var(--app-radius);
  background: var(--app-surface);
  box-shadow: var(--app-shadow-lg);
}

.auth-card .card-body {
  padding: 2rem;
}

.auth-title {
  font-weight: 700;
  color: var(--app-text);
  letter-spacing: -0.02em;
}

.btn-app-primary {
  border-radius: 999px;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  background: linear-gradient(135deg, var(--app-primary) 0%, var(--app-primary-dark) 100%);
  border: none;
  color: #fff;
  box-shadow: 0 0.35rem 0.85rem rgba(13, 148, 136, 0.35);
}

.btn-app-primary:hover,
.btn-app-primary:focus {
  background: linear-gradient(135deg, var(--app-primary-dark) 0%, #115e59 100%);
  color: #fff;
}

a.btn-app-primary,
a.btn-app-accent {
  text-decoration: none;
  color: #fff;
}

a.btn-app-outline {
  text-decoration: none;
  display: inline-block;
}

.btn-app-secondary {
  display: inline-block;
  width: 100%;
  text-align: center;
  border-radius: 999px;
  font-weight: 600;
  padding: 0.6rem 1rem;
  color: var(--app-primary-dark);
  background: var(--app-primary-light);
  border: 2px solid var(--app-border);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-app-secondary:hover,
.btn-app-secondary:focus {
  color: #fff;
  background: var(--app-primary);
  border-color: var(--app-primary);
}

.auth-divider-text {
  color: var(--app-text-muted);
  font-size: 0.9rem;
}

.app-alert {
  border-radius: 10px;
  border: none;
}

.app-form .form-control:invalid {
  box-shadow: none;
}

.app-form.was-validated .form-control:invalid {
  border-color: #dc3545;
}

.app-page--patient {
  min-height: 100vh;
  padding-bottom: 2rem;
  background: linear-gradient(165deg, #ecfeff 0%, #f0fdfa 50%, #e0f2fe 100%);
}

.app-page--doctor {
  min-height: 100vh;
  padding-bottom: 2rem;
  background: linear-gradient(165deg, #e0f2fe 0%, #f0fdfa 45%, #cffafe 100%);
}

.app-page--admin {
  min-height: 100vh;
  padding-bottom: 2rem;
  background: linear-gradient(165deg, #f8fafc 0%, #ecfeff 40%, #f0fdfa 100%);
}

.app-heading {
  font-weight: 700;
  color: var(--app-primary-dark);
  letter-spacing: -0.02em;
}

.app-heading--light {
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

.app-panel {
  background: var(--app-surface);
  border-radius: var(--app-radius);
  box-shadow: var(--app-shadow);
  border: 1px solid rgba(153, 246, 232, 0.6);
}

.app-card-dashboard {
  border-radius: var(--app-radius);
  border: 1px solid rgba(153, 246, 232, 0.5);
  box-shadow: var(--app-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.app-card-dashboard:hover {
  transform: translateY(-4px);
  box-shadow: var(--app-shadow-lg);
}

.btn-app-outline {
  border-radius: 999px;
  font-weight: 600;
  border: 2px solid var(--app-primary);
  color: var(--app-primary-dark);
  background: #fff;
}

.btn-app-outline:hover {
  background: var(--app-primary);
  color: #fff;
  border-color: var(--app-primary);
}

.btn-app-dark {
  border-radius: 999px;
  font-weight: 600;
  background: #134e4a;
  border: none;
}

.btn-app-dark:hover {
  background: #0f3d3a;
}

.btn-app-accent {
  border-radius: 999px;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  border: none;
  color: #fff;
  box-shadow: 0 0.35rem 0.85rem rgba(2, 132, 199, 0.35);
  text-decoration: none;
  display: inline-block;
}

.btn-app-accent:hover,
.btn-app-accent:focus {
  color: #fff;
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
}

.app-stat-card {
  border-radius: var(--app-radius);
  border: none;
}

.app-table-wrap {
  background: var(--app-surface);
  border-radius: var(--app-radius);
  padding: 1.5rem;
  box-shadow: var(--app-shadow);
  border: 1px solid rgba(153, 246, 232, 0.5);
}

.app-table-wrap .table {
  margin-bottom: 0;
}

.app-table-wrap thead th {
  background: var(--app-primary-dark);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  font-weight: 600;
  font-size: 0.875rem;
}