/* ==========================================================================
   AFibWatch - UI Components Stylesheet
   Reusable Buttons, Navigation, Cards, Modals, Toasts & Circular Indicators
   CodeIgniter 3 Migration Ready: assets/css/components.css
   ========================================================================== */

/* Buttons & Interactive Elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  min-height: 48px; /* Touch-friendly size */
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.btn-secondary {
  background: var(--neutral-100);
  color: var(--neutral-700);
  border-color: var(--neutral-200);
}

.btn-secondary:hover {
  background: var(--neutral-200);
  color: var(--neutral-900);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary-600);
  color: var(--primary-600);
}

.btn-outline:hover {
  background: var(--primary-50);
  color: var(--primary-700);
}

.btn-danger {
  background: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: #dc2626;
  color: #ffffff;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
  min-height: 36px;
  border-radius: var(--radius-md);
}

/* Touch Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple-anim 0.6s linear;
  background-color: rgba(255, 255, 255, 0.4);
}

@keyframes ripple-anim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Sidebar Styling (Desktop View) */
.sidebar {
  width: 260px;
  background: #ffffff;
  border-right: 1px solid var(--neutral-200);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
  transition: var(--transition-normal);
}

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--neutral-100);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--neutral-900);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
}

.sidebar-menu {
  list-style: none;
  padding: 16px 12px;
  flex: 1;
  overflow-y: auto;
}

.sidebar-item {
  margin-bottom: 4px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--neutral-600);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  transition: var(--transition-fast);
}

.sidebar-link i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
}

.sidebar-link:hover {
  background: var(--neutral-100);
  color: var(--primary-600);
}

.sidebar-link.active {
  background: var(--primary-50);
  color: var(--primary-700);
  font-weight: 700;
  border-left: 4px solid var(--primary-600);
  border-radius: 4px var(--radius-md) var(--radius-md) 4px;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--neutral-100);
}

/* User Avatar & Info */
.user-profile-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  background: var(--neutral-50);
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-100);
  color: var(--primary-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  border: 2px solid #ffffff;
  box-shadow: var(--shadow-sm);
}

.user-info-text {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--neutral-900);
}

.user-role {
  font-size: 0.78rem;
  color: var(--neutral-500);
  text-transform: capitalize;
}

/* Mobile Top Navigation & App Bar */
.mobile-app-bar {
  display: none; /* Desktop default hidden */
  background: #ffffff;
  padding: 12px 18px;
  border-bottom: 1px solid var(--neutral-200);
  position: sticky;
  top: 0;
  z-index: 90;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.mobile-app-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--neutral-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Mobile Bottom Navigation (Android Native Feel) */
.mobile-bottom-nav {
  display: none; /* Desktop default hidden */
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #ffffff;
  height: 68px;
  border-top: 1px solid var(--neutral-200);
  z-index: 1000;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
  justify-content: space-around;
  align-items: center;
  padding: 0 10px;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--neutral-400);
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 600;
  gap: 4px;
  flex: 1;
  height: 100%;
  transition: var(--transition-fast);
  position: relative;
}

.mobile-nav-item i {
  font-size: 1.35rem;
}

.mobile-nav-item.active {
  color: var(--primary-600);
  font-weight: 700;
}

.mobile-nav-item.active i {
  transform: translateY(-2px);
}

.nav-badge-count {
  position: absolute;
  top: 8px;
  right: 22%;
  background: var(--accent-red);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #ffffff;
}

/* Circular Risk Score Progress */
.risk-circle-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.circular-chart {
  max-width: 180px;
  max-height: 180px;
}

.circle-bg {
  fill: none;
  stroke: var(--neutral-200);
  stroke-width: 3.8;
}

.circle {
  fill: none;
  stroke-width: 3.8;
  stroke-linecap: round;
  transition: stroke-dasharray 1s ease-in-out;
}

.circle.low-risk { stroke: var(--accent-emerald); }
.circle.moderate-risk { stroke: var(--accent-amber); }
.circle.high-risk { stroke: var(--accent-red); }

.percentage {
  fill: var(--neutral-900);
  font-family: var(--font-family);
  font-weight: 800;
  font-size: 0.5rem;
  text-anchor: middle;
}

.risk-label-text {
  fill: var(--neutral-500);
  font-family: var(--font-family);
  font-size: 0.22rem;
  font-weight: 600;
  text-anchor: middle;
}

/* Stat Cards & AI Result Presentation */
.stat-card {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.stat-icon.primary { background: var(--primary-50); color: var(--primary-600); }
.stat-icon.blue { background: var(--secondary-50); color: var(--secondary-600); }
.stat-icon.amber { background: rgba(245, 158, 11, 0.1); color: var(--accent-amber); }
.stat-icon.red { background: rgba(239, 68, 68, 0.1); color: var(--accent-red); }

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--neutral-900);
  line-height: 1.1;
}

.stat-label {
  color: var(--neutral-500);
  font-size: 0.85rem;
  margin-top: 2px;
}

/* Form Controls & Inputs */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--neutral-700);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--neutral-800);
  background-color: #ffffff;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.15);
}

/* Custom Modal Component */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-normal);
}

.modal-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: var(--transition-normal);
}

.modal-backdrop.show .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.3rem;
  color: var(--neutral-400);
  cursor: pointer;
}

.modal-close-btn:hover {
  color: var(--neutral-800);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  border-left: 4px solid var(--primary-600);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  max-width: 380px;
  pointer-events: auto;
  animation: toast-slide-in 0.3s ease-out forwards;
}

.toast-success { border-left-color: var(--accent-emerald); }
.toast-warning { border-left-color: var(--accent-amber); }
.toast-danger { border-left-color: var(--accent-red); }

@keyframes toast-slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}