/* Base Reset & General Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  font-size: var(--font-size-base);
  overflow-x: hidden;
}

.container,
.app-container {
  max-width: var(--container-max-width, 1400px);
  width: 100%;
  margin: 0 auto;
  padding: var(--space-4);
  box-sizing: border-box;
}

/* Header */
header {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--space-3) var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--border-radius);
  margin-bottom: var(--space-4);
  box-shadow: var(--box-shadow-sm);
  flex-wrap: nowrap;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo {
  height: 50px;
  width: auto;
}

.brand-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
}

.bill-info-section {
  display: flex;
  align-items: center;
  gap: 15px;
  white-space: nowrap;
  flex-shrink: 0;
}

.bill-number-display {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
}

.date-time-display {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

header .user-badge {
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.12);
  padding: 3px 8px;
  border-radius: var(--border-radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Bill Header & Meta */
.bill-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-4);
}

.bill-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

/* Section Headings */
.page-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Cards (Form Sections) */
.section-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  box-shadow: var(--box-shadow-sm);
  border: 1px solid var(--color-border);
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Forms & Inputs */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

.required {
  color: var(--color-danger);
}

input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-input-bg);
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  transition: all 0.2s ease-in-out;
}

/* Remove spinner arrows from number inputs for clean financial editing */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  background-color: var(--color-surface);
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(44, 85, 63, 0.15);
}

input.error-input {
  border-color: var(--color-danger);
}

.error-message {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  margin-top: 4px;
}

/* Input Groups (Prefix/Suffix) */
.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
  max-width: 100%;
}

.input-group input {
  border-radius: 0;
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
}
.input-group .input-prefix {
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-input-bg);
  border: 1px solid transparent;
  border-right: none;
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}
.input-group .input-suffix {
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-input-bg);
  border: 1px solid transparent;
  border-left: none;
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}

/* Item Type Toggle */
.type-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 100px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--box-shadow-sm);
}

.toggle-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--box-shadow);
  color: var(--color-text);
  border-color: #cbd5e1;
}

.toggle-btn[data-type="gold"].active {
  background-color: var(--color-accent);
  color: var(--color-surface);
  border-color: var(--color-accent);
  box-shadow: 0 3px 10px rgba(196, 153, 51, 0.3);
}

.toggle-btn[data-type="silver"].active {
  background-color: var(--color-silver);
  color: var(--color-surface);
  border-color: var(--color-silver);
  box-shadow: 0 3px 10px rgba(148, 163, 184, 0.3);
}

.toggle-btn[data-type="both"].active {
  background: linear-gradient(135deg, #c49933 0%, #64748b 100%);
  color: #ffffff;
  border-color: #c49933;
  box-shadow: 0 3px 10px rgba(196, 153, 51, 0.35);
}


/* Highlights */
.highlight-box {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-sm);
  padding: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--color-border);
}

.highlight-box.net-weight-box {
  background-color: rgba(45, 106, 79, 0.05); /* very light green */
  border-color: var(--color-primary-light);
}

.highlight-box.total-paid-box {
  background-color: rgba(25, 135, 84, 0.05);
  border-color: var(--color-success);
}

.highlight-label {
  font-weight: var(--font-weight-bold);
}

.highlight-value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.net-weight-box .highlight-label,
.net-weight-box .highlight-value {
  color: var(--color-primary);
}

.total-paid-box .highlight-label,
.total-paid-box .highlight-value {
  color: var(--color-success);
}

/* Payment Indicator */
.payment-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  margin-top: var(--space-2);
}

.payment-indicator.success { color: var(--color-success); }
.payment-indicator.error { color: var(--color-danger); }

/* Image Upload Area */
.image-upload-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.upload-box {
  width: 120px;
  height: 120px;
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all 0.2s;
  background-color: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.upload-box:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: rgba(27, 67, 50, 0.05);
}

.upload-box i {
  font-size: 24px;
  margin-bottom: var(--space-1);
}

.upload-box span {
  font-size: 12px;
  text-align: center;
}

.upload-box input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.image-preview {
  position: relative;
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--color-border);
}

.image-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
}

.image-preview-wrapper {
  position: relative;
  width: 120px;
  height: 120px;
}

.remove-image-btn {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--color-danger);
  color: white;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  font-size: 14px;
  box-shadow: var(--box-shadow-sm);
}

/* Action Bar */
.action-bar {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 0.75rem var(--space-4);
  border-radius: var(--border-radius-sm);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  font-size: var(--font-size-base);
  box-shadow: var(--box-shadow-sm);
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-surface);
  box-shadow: 0 4px 6px rgba(44, 85, 63, 0.2);
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 12px rgba(44, 85, 63, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-input-bg);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: var(--color-surface);
  box-shadow: 0 4px 6px rgba(196, 153, 51, 0.2);
}
.btn-accent:hover:not(:disabled) {
  box-shadow: 0 6px 12px rgba(196, 153, 51, 0.3);
  transform: translateY(-1px);
}

/* Utilities */
.d-none { display: none !important; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(3px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  overflow-y: auto;
}

.modal.d-none {
  display: none !important;
}

.modal-content {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg, 12px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  animation: modalFadeIn 0.2s ease-out;
}

.modal-content.modal-lg {
  max-width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.modal-header h2, .modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-light, #888);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.modal-close-btn:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.05);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .container,
  .app-container {
    padding: var(--space-3);
  }
  header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
    padding: var(--space-3);
    align-items: center;
  }
  .bill-info-section {
    justify-content: center;
    flex-wrap: wrap;
    white-space: normal;
    gap: 8px;
  }
  .nav-tab-group {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: center;
  }
  .bill-header {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: var(--space-3) !important;
  }
  .bill-header .page-title {
    text-align: left !important;
  }
  .bill-header .bill-meta {
    text-align: left !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    width: 100% !important;
    gap: var(--space-2) !important;
  }
  .bill-header .bill-meta > div {
    justify-content: flex-start !important;
    width: 100% !important;
    flex-wrap: wrap !important;
  }
  #branch-selector-group,
  #historic-date-picker-group {
    width: 100% !important;
    flex-wrap: wrap !important;
    justify-content: flex-start !important;
  }
  .form-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .payment-split-row,
  .form-row.d-flex {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: var(--space-2) !important;
  }
  .payment-split-row > div,
  .form-row.d-flex > div {
    margin: 0 !important;
    width: 100% !important;
  }
  .action-bar {
    flex-direction: column;
    width: 100%;
    gap: var(--space-2);
  }
  .action-bar .btn {
    width: 100%;
    justify-content: center;
  }
  .modal-content {
    max-height: 95vh;
    margin: 10px;
    width: calc(100% - 20px);
  }
  .modal-footer {
    flex-direction: column;
    gap: var(--space-2);
  }
  .modal-footer .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container,
  .app-container {
    padding: var(--space-2);
  }
  .section-card {
    padding: var(--space-3);
  }
  .nav-tab-group {
    justify-content: flex-start;
    padding: 3px;
  }
  .nav-tab {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
  header .brand-title {
    font-size: 1.25rem;
  }
  .rate-ticker-card {
    padding: var(--space-2) !important;
  }
  .rate-ticker-card span {
    font-size: 0.78rem !important;
  }
  .highlight-box {
    padding: var(--space-3);
  }
  .highlight-value {
    font-size: 1.3rem;
  }
}

/* Global Header Navigation Tabs */
.nav-tab-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-input-bg, #f1f5f9);
  padding: 4px;
  border-radius: var(--border-radius, 12px);
  border: 1px solid var(--color-border, #e2e8f0);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: var(--font-size-sm, 0.875rem);
  font-weight: var(--font-weight-medium, 500);
  color: var(--color-text-muted, #64748b);
  text-decoration: none;
  border-radius: var(--border-radius-sm, 6px);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-tab:hover {
  color: var(--color-primary, #1e3a2b);
  background: rgba(255, 255, 255, 0.7);
}

.nav-tab.active {
  color: var(--color-primary, #1e3a2b);
  background: var(--color-surface, #ffffff);
  font-weight: var(--font-weight-bold, 600);
  box-shadow: var(--box-shadow-sm, 0 1px 2px 0 rgb(0 0 0 / 0.05));
  border: 1px solid var(--color-border, #e2e8f0);
}

.nav-tab.active i {
  color: var(--color-accent, #c49933);
}

/* -------------------------------------------------------------
   Persistent Platform Footer (Option 2 Brand Footprint)
   ------------------------------------------------------------- */
.platform-footer {
  max-width: var(--container-max-width, 1400px);
  width: 100%;
  margin-top: var(--space-5, 2rem);
  margin-bottom: var(--space-3, 1rem);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
  padding: 14px 20px;
  background: var(--color-surface, #ffffff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: var(--border-radius, 12px);
  box-shadow: var(--box-shadow-sm, 0 1px 2px 0 rgb(0 0 0 / 0.05));
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.platform-footer-brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.platform-footer-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 50%;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.12));
}

.platform-footer-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary, #1e3a2b);
  letter-spacing: 0.03em;
}

.platform-footer-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted, #64748b);
  margin-top: 1px;
}

.platform-footer-compliance {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--color-text-muted, #64748b);
}

.platform-footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #f1f5f9;
  border: 1px solid var(--color-border, #e2e8f0);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
  color: #334155;
  font-size: 0.75rem;
}

.platform-footer-badge i {
  color: var(--color-accent, #c49933);
}

.platform-footer-login {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border, #e2e8f0);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted, #64748b);
}

@media (max-width: 768px) {
  .platform-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 14px;
    gap: 10px;
  }
  .platform-footer-compliance {
    flex-wrap: wrap;
    gap: 8px;
  }
}