/* ==============================================
   EPOS Design System - Base Styles
   ============================================== */

/* ===== Reset ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  font-family: var(--font-family);
  color: var(--sphinx);
  background-color: var(--cloud-dancer);
  line-height: 1.5;
}

/* ===== Stable Background (LIFF) ===== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh; /* Fallback */
  height: 100lvh;
  background: var(--cloud-dancer) url('../background.webp') center/cover no-repeat;
  z-index: -1;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--sphinx);
}

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

/* ===== Material Icons ===== */
.material-symbols-rounded {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* ===== Loading State ===== */
#authLoading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(242, 240, 235, 0.95);
  z-index: var(--z-loading);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  backdrop-filter: blur(8px);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--cloud-dancer);
  border-top-color: var(--nile-water);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== Buttons ===== */
.btn-primary {
  background: var(--nile-water);
  border: none;
  color: white;
  font-weight: 600;
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-primary:active {
  background: var(--nile-water-hover);
  transform: scale(0.97);
}

.btn-primary:disabled {
  background: var(--sphinx-light);
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: white;
  border: 1.5px solid var(--border-medium);
  color: var(--sphinx);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-secondary:active {
  background: var(--cloud-dancer);
  transform: scale(0.97);
}

.btn-danger {
  background: var(--danger);
  border: none;
  color: white;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-danger:active {
  opacity: 0.9;
  transform: scale(0.96);
}

.btn-sm {
  background: var(--nile-water);
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

/* ===== Form Elements ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--sphinx-light);
  margin-bottom: 6px;
  display: block;
}

.form-control {
  width: 100%;
  background: var(--cloud-dancer);
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: var(--font-size-base);
  color: var(--sphinx);
  transition: all var(--transition-normal);
}

.form-control:focus {
  border-color: var(--nile-water);
  outline: none;
  background: white;
}

.form-control::placeholder {
  color: var(--sphinx-light);
}

.form-select {
  width: 100%;
  background: var(--cloud-dancer);
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: var(--font-size-base);
  color: var(--sphinx);
  cursor: pointer;
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-check-input {
  width: 20px;
  height: 20px;
  accent-color: var(--nile-water);
}

/* ===== Cards ===== */
.content-card {
  background: rgba(253, 252, 250, 0.95);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(8px);
}

.section-title {
  font-size: var(--font-size-sm);
  color: var(--sphinx-light);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-bg);
  z-index: var(--z-modal);
  display: none;
  align-items: flex-end;
  justify-content: center;
  cursor: pointer;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: white;
  width: 100%;
  max-height: 90vh;
  border-radius: var(--radius-modal) var(--radius-modal) 0 0;
  overflow: hidden;
  animation: slideUp 0.3s ease;
  cursor: default;
}

.modal.closing .modal-content {
  animation: slideDown 0.25s ease forwards;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}

.modal-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  flex: 1;
  font-weight: 600;
  font-size: var(--font-size-lg);
}

.modal-close {
  background: none;
  border: none;
  color: var(--sphinx-light);
  cursor: pointer;
  padding: var(--spacing-sm);
}

.modal-body {
  padding: var(--spacing-lg);
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  display: flex;
  gap: var(--spacing-md);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--sphinx);
  color: white;
  padding: 14px 24px;
  border-radius: var(--radius-full);
  z-index: var(--z-toast);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-slow), opacity var(--transition-slow);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  max-width: 90vw;
  height: auto;
  bottom: auto;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 600; }
.text-muted { color: var(--sphinx-light); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-primary { color: var(--nile-water); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--sphinx-light);
}

.empty-state .material-symbols-rounded {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}