/* Modern Material Design 3 System for Accounting Application */

/* ================== DESIGN TOKENS ================== */
:root {
  /* Color System - Modern Business Theme */
  --md-sys-color-primary: #2563EB;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #DBEAFE;
  --md-sys-color-on-primary-container: #1E3A8A;
  
  --md-sys-color-secondary: #059669;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #D1FAE5;
  --md-sys-color-on-secondary-container: #064E3B;
  
  --md-sys-color-tertiary: #DC2626;
  --md-sys-color-on-tertiary: #FFFFFF;
  --md-sys-color-tertiary-container: #FEE2E2;
  --md-sys-color-on-tertiary-container: #7F1D1D;
  
  --md-sys-color-error: #BA1A1A;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #FFDAD6;
  --md-sys-color-on-error-container: #410002;
  
  --md-sys-color-success: #006E1C;
  --md-sys-color-on-success: #FFFFFF;
  --md-sys-color-success-container: #6EFF81;
  --md-sys-color-on-success-container: #002204;
  
  --md-sys-color-warning: #8C4A00;
  --md-sys-color-on-warning: #FFFFFF;
  --md-sys-color-warning-container: #FFDBCC;
  --md-sys-color-on-warning-container: #2E1400;
  
  /* Surface Colors */
  --md-sys-color-surface: #FFFFFF;
  --md-sys-color-on-surface: #1F2937;
  --md-sys-color-surface-variant: #F8FAFC;
  --md-sys-color-on-surface-variant: #64748B;
  --md-sys-color-surface-container-lowest: #FFFFFF;
  --md-sys-color-surface-container-low: #F8FAFC;
  --md-sys-color-surface-container: #F1F5F9;
  --md-sys-color-surface-container-high: #E2E8F0;
  --md-sys-color-surface-container-highest: #CBD5E1;
  
  /* Outline Colors */
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  
  /* Typography Scale */
  --md-sys-typescale-display-large-size: 57px;
  --md-sys-typescale-display-large-weight: 400;
  --md-sys-typescale-display-large-line-height: 64px;
  
  --md-sys-typescale-display-medium-size: 45px;
  --md-sys-typescale-display-medium-weight: 400;
  --md-sys-typescale-display-medium-line-height: 52px;
  
  --md-sys-typescale-display-small-size: 36px;
  --md-sys-typescale-display-small-weight: 400;
  --md-sys-typescale-display-small-line-height: 44px;
  
  --md-sys-typescale-headline-large-size: 32px;
  --md-sys-typescale-headline-large-weight: 400;
  --md-sys-typescale-headline-large-line-height: 40px;
  
  --md-sys-typescale-headline-medium-size: 28px;
  --md-sys-typescale-headline-medium-weight: 400;
  --md-sys-typescale-headline-medium-line-height: 36px;
  
  --md-sys-typescale-headline-small-size: 24px;
  --md-sys-typescale-headline-small-weight: 400;
  --md-sys-typescale-headline-small-line-height: 32px;
  
  --md-sys-typescale-title-large-size: 22px;
  --md-sys-typescale-title-large-weight: 400;
  --md-sys-typescale-title-large-line-height: 28px;
  
  --md-sys-typescale-title-medium-size: 16px;
  --md-sys-typescale-title-medium-weight: 500;
  --md-sys-typescale-title-medium-line-height: 24px;
  
  --md-sys-typescale-title-small-size: 14px;
  --md-sys-typescale-title-small-weight: 500;
  --md-sys-typescale-title-small-line-height: 20px;
  
  --md-sys-typescale-label-large-size: 14px;
  --md-sys-typescale-label-large-weight: 500;
  --md-sys-typescale-label-large-line-height: 20px;
  
  --md-sys-typescale-label-medium-size: 12px;
  --md-sys-typescale-label-medium-weight: 500;
  --md-sys-typescale-label-medium-line-height: 16px;
  
  --md-sys-typescale-label-small-size: 11px;
  --md-sys-typescale-label-small-weight: 500;
  --md-sys-typescale-label-small-line-height: 16px;
  
  --md-sys-typescale-body-large-size: 16px;
  --md-sys-typescale-body-large-weight: 400;
  --md-sys-typescale-body-large-line-height: 24px;
  
  --md-sys-typescale-body-medium-size: 14px;
  --md-sys-typescale-body-medium-weight: 400;
  --md-sys-typescale-body-medium-line-height: 20px;
  
  --md-sys-typescale-body-small-size: 12px;
  --md-sys-typescale-body-small-weight: 400;
  --md-sys-typescale-body-small-line-height: 16px;
  
  /* Spacing System */
  --md-sys-spacing-xs: 4px;
  --md-sys-spacing-sm: 8px;
  --md-sys-spacing-md: 16px;
  --md-sys-spacing-lg: 24px;
  --md-sys-spacing-xl: 32px;
  --md-sys-spacing-2xl: 48px;
  --md-sys-spacing-3xl: 64px;
  
  /* Border Radius */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
  
  /* Elevation */
  --md-sys-elevation-level0: none;
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level4: 0px 2px 3px 0px rgba(0, 0, 0, 0.3), 0px 6px 10px 4px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level5: 0px 4px 4px 0px rgba(0, 0, 0, 0.3), 0px 8px 12px 6px rgba(0, 0, 0, 0.15);
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-primary: #60A5FA;
    --md-sys-color-on-primary: #1E3A8A;
    --md-sys-color-primary-container: #1E40AF;
    --md-sys-color-on-primary-container: #DBEAFE;
    
    --md-sys-color-secondary: #34D399;
    --md-sys-color-on-secondary: #064E3B;
    --md-sys-color-secondary-container: #065F46;
    --md-sys-color-on-secondary-container: #D1FAE5;
    
    --md-sys-color-surface: #0F172A;
    --md-sys-color-on-surface: #E2E8F0;
    --md-sys-color-surface-container-lowest: #020617;
    --md-sys-color-surface-container-low: #1E293B;
    --md-sys-color-surface-container: #334155;
    --md-sys-color-surface-container-high: #475569;
    --md-sys-color-surface-container-highest: #64748B;
  }
}

/* ================== BASE STYLES ================== */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: var(--md-sys-typescale-body-large-size);
  font-weight: var(--md-sys-typescale-body-large-weight);
  line-height: var(--md-sys-typescale-body-large-line-height);
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface);
  margin: 0;
  padding: 0;
}

/* ================== TYPOGRAPHY COMPONENTS ================== */
.md-display-large {
  font-size: var(--md-sys-typescale-display-large-size);
  font-weight: var(--md-sys-typescale-display-large-weight);
  line-height: var(--md-sys-typescale-display-large-line-height);
  margin: 0;
}

.md-display-medium {
  font-size: var(--md-sys-typescale-display-medium-size);
  font-weight: var(--md-sys-typescale-display-medium-weight);
  line-height: var(--md-sys-typescale-display-medium-line-height);
  margin: 0;
}

.md-headline-large {
  font-size: var(--md-sys-typescale-headline-large-size);
  font-weight: var(--md-sys-typescale-headline-large-weight);
  line-height: var(--md-sys-typescale-headline-large-line-height);
  margin: 0;
}

.md-headline-medium {
  font-size: var(--md-sys-typescale-headline-medium-size);
  font-weight: var(--md-sys-typescale-headline-medium-weight);
  line-height: var(--md-sys-typescale-headline-medium-line-height);
  margin: 0;
}

.md-title-large {
  font-size: var(--md-sys-typescale-title-large-size);
  font-weight: var(--md-sys-typescale-title-large-weight);
  line-height: var(--md-sys-typescale-title-large-line-height);
  margin: 0;
}

.md-title-medium {
  font-size: var(--md-sys-typescale-title-medium-size);
  font-weight: var(--md-sys-typescale-title-medium-weight);
  line-height: var(--md-sys-typescale-title-medium-line-height);
  margin: 0;
}

.md-body-large {
  font-size: var(--md-sys-typescale-body-large-size);
  font-weight: var(--md-sys-typescale-body-large-weight);
  line-height: var(--md-sys-typescale-body-large-line-height);
  margin: 0;
}

.md-body-medium {
  font-size: var(--md-sys-typescale-body-medium-size);
  font-weight: var(--md-sys-typescale-body-medium-weight);
  line-height: var(--md-sys-typescale-body-medium-line-height);
  margin: 0;
}

.md-label-large {
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: var(--md-sys-typescale-label-large-weight);
  line-height: var(--md-sys-typescale-label-large-line-height);
  margin: 0;
}

/* ================== BUTTON COMPONENTS ================== */
.md-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border: none;
  border-radius: var(--md-sys-shape-corner-full);
  font-family: inherit;
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: var(--md-sys-typescale-label-large-weight);
  line-height: var(--md-sys-typescale-label-large-line-height);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  min-height: 40px;
  overflow: hidden;
}

.md-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

/* Filled Button (Primary) */
.md-button--filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-sys-elevation-level0);
}

.md-button--filled:hover:not(:disabled) {
  box-shadow: var(--md-sys-elevation-level1);
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 92%, var(--md-sys-color-on-primary) 8%);
}

.md-button--filled:active:not(:disabled) {
  box-shadow: var(--md-sys-elevation-level0);
}

/* Outlined Button */
.md-button--outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}

.md-button--outlined:hover:not(:disabled) {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
}

/* Text Button */
.md-button--text {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  padding: 10px 12px;
}

.md-button--text:hover:not(:disabled) {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent);
}

/* FAB (Floating Action Button) */
.md-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  cursor: pointer;
  box-shadow: var(--md-sys-elevation-level3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  z-index: 1000;
}

.md-fab:hover {
  box-shadow: var(--md-sys-elevation-level4);
}

/* ================== CARD COMPONENTS ================== */
.md-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-level1);
  overflow: hidden;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.md-card:hover {
  box-shadow: var(--md-sys-elevation-level2);
}

.md-card--elevated {
  background-color: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-level1);
}

.md-card--filled {
  background-color: var(--md-sys-color-surface-container-highest);
  box-shadow: var(--md-sys-elevation-level0);
}

.md-card--outlined {
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-sys-elevation-level0);
}

.md-card__content {
  padding: var(--md-sys-spacing-lg);
}

.md-card__header {
  padding: var(--md-sys-spacing-lg) var(--md-sys-spacing-lg) 0;
}

.md-card__actions {
  padding: var(--md-sys-spacing-sm) var(--md-sys-spacing-lg) var(--md-sys-spacing-lg);
  display: flex;
  gap: var(--md-sys-spacing-sm);
  align-items: center;
}

/* ================== FORM COMPONENTS ================== */
.md-text-field {
  position: relative;
  display: flex;
  flex-direction: column;
  margin-bottom: var(--md-sys-spacing-lg);
}

.md-text-field__input {
  background-color: var(--md-sys-color-surface-container-highest);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-extra-small) var(--md-sys-shape-corner-extra-small) 0 0;
  padding: 16px;
  font-size: var(--md-sys-typescale-body-large-size);
  font-family: inherit;
  color: var(--md-sys-color-on-surface);
  outline: none;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  border-bottom: 2px solid var(--md-sys-color-outline);
}

.md-text-field__input:focus {
  border-bottom-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container-high);
}

.md-text-field__input:invalid {
  border-bottom-color: var(--md-sys-color-error);
}

.md-text-field__label {
  position: absolute;
  top: 16px;
  left: 16px;
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-large-size);
  pointer-events: none;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  transform-origin: left;
}

.md-text-field__input:focus + .md-text-field__label,
.md-text-field__input:not(:placeholder-shown) + .md-text-field__label {
  transform: translateY(-12px) scale(0.75);
  color: var(--md-sys-color-primary);
}

.md-text-field__helper {
  font-size: var(--md-sys-typescale-body-small-size);
  color: var(--md-sys-color-on-surface-variant);
  margin-top: var(--md-sys-spacing-xs);
  padding-left: 16px;
}

.md-text-field__error {
  font-size: var(--md-sys-typescale-body-small-size);
  color: var(--md-sys-color-error);
  margin-top: var(--md-sys-spacing-xs);
  padding-left: 16px;
}

/* ================== NAVIGATION COMPONENTS ================== */
.md-navigation-bar {
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: 0;
  min-height: 64px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.md-navigation-bar__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--md-sys-spacing-lg);
}

.md-navigation-bar__title {
  font-size: var(--md-sys-typescale-title-large-size);
  font-weight: var(--md-sys-typescale-title-large-weight);
  color: var(--md-sys-color-on-surface);
}

.md-navigation-bar__actions {
  display: flex;
  gap: var(--md-sys-spacing-sm);
  align-items: center;
}

/* ================== DATA TABLE COMPONENTS ================== */
.md-data-table {
  width: 100%;
  background-color: var(--md-sys-color-surface);
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-level1);
  overflow: hidden;
}

.md-data-table__container {
  overflow-x: auto;
}

.md-data-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--md-sys-typescale-body-medium-size);
}

.md-data-table th {
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface-variant);
  font-weight: var(--md-sys-typescale-title-medium-weight);
  padding: var(--md-sys-spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
}

.md-data-table td {
  padding: var(--md-sys-spacing-md);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
}

.md-data-table tr:hover {
  background-color: var(--md-sys-color-surface-container-lowest);
}

/* ================== UTILITY CLASSES ================== */
.md-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--md-sys-spacing-lg);
}

.md-surface {
  background-color: var(--md-sys-color-surface);
}

.md-surface-container {
  background-color: var(--md-sys-color-surface-container);
}

.md-primary-color {
  color: var(--md-sys-color-primary);
}

.md-error-color {
  color: var(--md-sys-color-error);
}

.md-success-color {
  color: var(--md-sys-color-success);
}

.md-text-center {
  text-align: center;
}

.md-flex {
  display: flex;
}

.md-flex-column {
  flex-direction: column;
}

.md-items-center {
  align-items: center;
}

.md-justify-center {
  justify-content: center;
}

.md-justify-between {
  justify-content: space-between;
}

.md-gap-sm {
  gap: var(--md-sys-spacing-sm);
}

.md-gap-md {
  gap: var(--md-sys-spacing-md);
}

.md-gap-lg {
  gap: var(--md-sys-spacing-lg);
}

.md-p-sm {
  padding: var(--md-sys-spacing-sm);
}

.md-p-md {
  padding: var(--md-sys-spacing-md);
}

.md-p-lg {
  padding: var(--md-sys-spacing-lg);
}

.md-m-sm {
  margin: var(--md-sys-spacing-sm);
}

.md-m-md {
  margin: var(--md-sys-spacing-md);
}

.md-m-lg {
  margin: var(--md-sys-spacing-lg);
}

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

.md-mt-lg {
  margin-top: var(--md-sys-spacing-lg);
}

/* ================== RESPONSIVE UTILITIES ================== */
@media (max-width: 768px) {
  .md-container {
    padding: 0 var(--md-sys-spacing-md);
  }
  
  .md-navigation-bar__content {
    padding: 0 var(--md-sys-spacing-md);
  }
  
  .md-fab {
    bottom: 16px;
    right: 16px;
  }
  
  .md-card__content {
    padding: var(--md-sys-spacing-md);
  }
}

/* ================== ANIMATIONS ================== */
@keyframes md-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.md-fade-in {
  animation: md-fade-in 0.3s cubic-bezier(0.2, 0, 0, 1);
}

/* ================== LOADING STATES ================== */
.md-loading {
  position: relative;
  overflow: hidden;
}

.md-loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--md-sys-color-primary) 20%, transparent),
    transparent
  );
  animation: md-shimmer 1.5s infinite;
}

@keyframes md-shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}