/* ====================================================
   Thai Freelance ERP Lite - Design System CSS
   Based on: ProFreelance ERP (Google Stitch)
   Primary: Indigo #4648d4 | Font: Inter
   ==================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors */
  --color-primary:                  #4648d4;
  --color-on-primary:               #ffffff;
  --color-primary-container:        #6063ee;
  --color-on-primary-container:     #fffbff;
  --color-primary-fixed:            #e1e0ff;
  --color-primary-fixed-dim:        #c0c1ff;
  --color-inverse-primary:          #c0c1ff;

  --color-secondary:                #565e74;
  --color-on-secondary:             #ffffff;
  --color-secondary-container:      #dae2fd;
  --color-on-secondary-container:   #5c647a;

  --color-tertiary:                 #904900;
  --color-on-tertiary:              #ffffff;
  --color-tertiary-container:       #b55d00;

  --color-surface:                  #f7f9fb;
  --color-surface-dim:              #d8dadc;
  --color-surface-bright:           #f7f9fb;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low:    #f2f4f6;
  --color-surface-container:        #eceef0;
  --color-surface-container-high:   #e6e8ea;
  --color-surface-container-highest:#e0e3e5;
  --color-on-surface:               #191c1e;
  --color-on-surface-variant:       #464554;
  --color-inverse-surface:          #2d3133;
  --color-inverse-on-surface:       #eff1f3;
  --color-background:               #f7f9fb;
  --color-on-background:            #191c1e;

  --color-outline:                  #767586;
  --color-outline-variant:          #c7c4d7;

  --color-error:                    #ba1a1a;
  --color-on-error:                 #ffffff;
  --color-error-container:          #ffdad6;

  /* Semantic / Status Colors */
  --color-status-paid:              #10B981;
  --color-status-pending:           #F59E0B;
  --color-status-draft:             #64748B;
  --color-status-cancelled:         #EF4444;
  --color-wht-accent:               #8B5CF6;

  /* Borders */
  --color-workspace-border:         #E2E8F0;

  /* Typography */
  --font-family:                    'Inter', sans-serif;
  --font-size-display-kpi:          36px;
  --line-height-display-kpi:        44px;
  --letter-spacing-display-kpi:     -0.02em;
  --font-weight-display-kpi:        700;

  --font-size-headline-lg:          24px;
  --line-height-headline-lg:        32px;
  --font-weight-headline-lg:        600;

  --font-size-headline-md:          20px;
  --line-height-headline-md:        28px;
  --font-weight-headline-md:        600;

  --font-size-body-lg:              16px;
  --line-height-body-lg:            24px;
  --font-weight-body-lg:            400;

  --font-size-body-md:              14px;
  --line-height-body-md:            20px;
  --font-weight-body-md:            400;

  --font-size-label-sm:             12px;
  --line-height-label-sm:           16px;
  --letter-spacing-label-sm:        0.05em;
  --font-weight-label-sm:           600;

  --font-size-mono-data:            14px;
  --line-height-mono-data:          20px;
  --letter-spacing-mono-data:       -0.01em;
  --font-weight-mono-data:          500;

  /* Spacing */
  --sidebar-width:                  260px;
  --container-max:                  1280px;
  --gutter:                         24px;
  --margin-mobile:                  16px;
  --stack-gap:                      12px;

  /* Border Radius */
  --radius-sm:                      0.125rem;  /* 2px */
  --radius:                         0.25rem;   /* 4px */
  --radius-md:                      0.375rem;  /* 6px */
  --radius-lg:                      0.5rem;    /* 8px */
  --radius-xl:                      0.75rem;   /* 12px */
  --radius-full:                    9999px;

  /* Shadows */
  --shadow-card:                    0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-fab:                     0 4px 12px rgba(70,72,212,0.3);
  --shadow-nav:                     0 -4px 12px rgba(70,72,212,0.08);

  /* Transitions */
  --transition-fast:                150ms ease;
  --transition-base:                200ms ease;
}

/* ====================================================
   Base Reset & Globals
   ==================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body-md);
  line-height: var(--line-height-body-md);
  font-weight: var(--font-weight-body-md);
  background-color: var(--color-background);
  color: var(--color-on-background);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }
img { max-width: 100%; display: block; }

/* ====================================================
   Typography Utilities
   ==================================================== */
.text-display-kpi {
  font-size: var(--font-size-display-kpi);
  line-height: var(--line-height-display-kpi);
  letter-spacing: var(--letter-spacing-display-kpi);
  font-weight: var(--font-weight-display-kpi);
}
.text-headline-lg {
  font-size: var(--font-size-headline-lg);
  line-height: var(--line-height-headline-lg);
  font-weight: var(--font-weight-headline-lg);
}
.text-headline-md {
  font-size: var(--font-size-headline-md);
  line-height: var(--line-height-headline-md);
  font-weight: var(--font-weight-headline-md);
}
.text-body-lg {
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-body-lg);
  font-weight: var(--font-weight-body-lg);
}
.text-body-md {
  font-size: var(--font-size-body-md);
  line-height: var(--line-height-body-md);
  font-weight: var(--font-weight-body-md);
}
.text-label-sm {
  font-size: var(--font-size-label-sm);
  line-height: var(--line-height-label-sm);
  letter-spacing: var(--letter-spacing-label-sm);
  font-weight: var(--font-weight-label-sm);
  text-transform: uppercase;
}
.text-mono-data {
  font-size: var(--font-size-mono-data);
  line-height: var(--line-height-mono-data);
  letter-spacing: var(--letter-spacing-mono-data);
  font-weight: var(--font-weight-mono-data);
}

/* ====================================================
   Layout: Sidebar + Content
   ==================================================== */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--color-surface-container-lowest);
  border-right: 1px solid var(--color-workspace-border);
  display: none;
  flex-direction: column;
  z-index: 50;
  overflow-y: auto;
}
@media (min-width: 768px) { .sidebar { display: flex; } }

.sidebar-header {
  padding: 24px 24px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.sidebar-logo {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface-container);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.sidebar-logo img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-brand { color: var(--color-primary); }
.sidebar-brand .brand-name { font-size: 18px; font-weight: 700; line-height: 1.2; }
.sidebar-brand .brand-sub { font-size: 11px; color: var(--color-secondary); letter-spacing: 0.04em; }

.sidebar-nav { flex: 1; padding: 8px 8px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-xl);
  color: var(--color-secondary);
  font-size: var(--font-size-body-md);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.nav-item:hover { background: var(--color-surface-container-high); }
.nav-item:active { transform: scale(0.98); }
.nav-item.active {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}
.nav-item .material-symbols-outlined { font-size: 22px; }

.sidebar-footer {
  padding: 16px 8px;
  border-top: 1px solid var(--color-workspace-border);
  display: flex; flex-direction: column; gap: 2px;
}

.btn-new-invoice {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-body-md);
  font-weight: 600;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  margin: 12px 8px 0;
  width: calc(100% - 16px);
}
.btn-new-invoice:hover { opacity: 0.9; }
.btn-new-invoice:active { transform: scale(0.98); }

/* Main Content */
.main-content {
  flex: 1;
  min-height: 100vh;
  padding: var(--gutter);
  padding-bottom: 40px;
}
@media (min-width: 768px) {
  .main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
  }
}
@media (max-width: 767px) {
  .main-content {
    padding: var(--margin-mobile);
    padding-bottom: 100px;
  }
}

.content-inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ====================================================
   Mobile Header
   ==================================================== */
.mobile-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 var(--margin-mobile);
  height: 64px;
  background: var(--color-surface-container-lowest);
  border-bottom: 1px solid var(--color-workspace-border);
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(8px);
}
@media (min-width: 768px) { .mobile-header { display: none; } }

.mobile-header .brand { color: var(--color-primary); font-size: 20px; font-weight: 700; }
.mobile-header .header-actions { display: flex; gap: 8px; align-items: center; }
.mobile-header .icon-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-on-surface-variant);
  transition: background var(--transition-fast);
}
.mobile-header .icon-btn:hover { background: var(--color-surface-container); }
.mobile-header .avatar {
  width: 32px; height: 32px;
  border-radius: var(--radius-full);
  overflow: hidden; background: var(--color-surface-container);
}

/* ====================================================
   Mobile Bottom Nav
   ==================================================== */
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; width: 100%;
  background: rgba(247,249,251,0.92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-workspace-border);
  box-shadow: var(--shadow-nav);
  padding: 8px 16px 16px;
  justify-content: space-around;
  z-index: 50;
}
@media (max-width: 767px) { .bottom-nav { display: flex; } }

.bottom-nav-item {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  color: var(--color-on-surface-variant);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.bottom-nav-item:active { transform: scale(0.9); }
.bottom-nav-item.active {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}
.bottom-nav-item .material-symbols-outlined { font-size: 22px; }

/* FAB */
.fab {
  position: fixed;
  right: 24px; bottom: 88px;
  width: 56px; height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-fab);
  z-index: 45;
  transition: transform var(--transition-base);
}
.fab:hover { transform: scale(1.05); }
.fab:active { transform: scale(0.96); }
@media (min-width: 768px) { .fab { display: none; } }

/* ====================================================
   KPI Cards
   ==================================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}
@media (min-width: 768px) {
  .kpi-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}

.kpi-card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-workspace-border);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}
.kpi-card::before {
  content: '';
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.kpi-card:hover::before { opacity: 1; }
.kpi-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }

.kpi-card--revenue::before { background: linear-gradient(135deg, rgba(70,72,212,0.05), transparent); }
.kpi-card--wht::before    { background: linear-gradient(135deg, rgba(139,92,246,0.05), transparent); }
.kpi-card--pending::before { background: linear-gradient(135deg, rgba(245,158,11,0.05), transparent); }

.kpi-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.kpi-label {
  font-size: var(--font-size-label-sm);
  font-weight: var(--font-weight-label-sm);
  letter-spacing: var(--letter-spacing-label-sm);
  text-transform: uppercase;
  color: var(--color-secondary);
}
.kpi-label-icon { display: flex; align-items: center; gap: 4px; }
.kpi-icon { font-size: 20px; }
.kpi-icon--primary  { color: var(--color-primary); }
.kpi-icon--wht      { color: var(--color-wht-accent); }
.kpi-icon--pending  { color: var(--color-status-pending); }

.kpi-value { display: flex; align-items: baseline; gap: 6px; margin-top: 4px; }
.kpi-currency { font-size: 14px; color: var(--color-on-surface-variant); }
.kpi-amount {
  font-size: var(--font-size-display-kpi);
  line-height: var(--line-height-display-kpi);
  letter-spacing: var(--letter-spacing-display-kpi);
  font-weight: var(--font-weight-display-kpi);
  color: var(--color-on-surface);
}

.kpi-footer {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(226,232,240,0.6);
}
.kpi-trend { font-size: 13px; display: flex; align-items: center; gap: 4px; }
.kpi-trend--up    { color: var(--color-status-paid); }
.kpi-trend--info  { color: var(--color-secondary); }

/* ====================================================
   Data Tables
   ==================================================== */
.table-card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-workspace-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.data-table { width: 100%; border-collapse: collapse; }
.data-table thead tr {
  background: var(--color-surface-container-low);
  border-bottom: 1px solid var(--color-workspace-border);
}
.data-table th {
  padding: 14px 20px;
  font-size: var(--font-size-label-sm);
  font-weight: var(--font-weight-label-sm);
  letter-spacing: var(--letter-spacing-label-sm);
  text-transform: uppercase;
  color: var(--color-secondary);
  text-align: left;
  white-space: nowrap;
}
.data-table th.text-right { text-align: right; }
.data-table tbody tr {
  border-bottom: 1px solid var(--color-workspace-border);
  transition: background var(--transition-fast);
}
.data-table tbody tr:last-child { border-bottom: none; }
.data-table tbody tr:hover { background: var(--color-surface-container-low); }
.data-table td {
  padding: 16px 20px;
  font-size: var(--font-size-body-md);
  color: var(--color-on-surface-variant);
}
.data-table td.font-medium { font-weight: 500; color: var(--color-on-surface); }
.data-table td.font-mono   { font-family: var(--font-family); letter-spacing: -0.01em; font-weight: 500; }
.data-table td.text-right  { text-align: right; font-weight: 600; color: var(--color-on-surface); }
.data-table .row-action    { text-align: right; }
.data-table .row-action button {
  color: var(--color-secondary);
  padding: 4px;
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.data-table tbody tr:hover .row-action button { opacity: 1; }
.data-table .row-action button:hover { color: var(--color-primary); background: var(--color-surface-container); }

/* ====================================================
   Status Badges
   ==================================================== */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge--paid      { background: rgba(16,185,129,0.12); color: var(--color-status-paid); }
.badge--pending   { background: rgba(245,158,11,0.12); color: var(--color-status-pending); }
.badge--draft     { background: rgba(100,116,139,0.12); color: var(--color-status-draft); }
.badge--cancelled { background: rgba(239,68,68,0.12);  color: var(--color-status-cancelled); }

/* ====================================================
   Mobile Document Cards
   ==================================================== */
.mobile-card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-workspace-border);
  border-radius: var(--radius-xl);
  padding: 16px;
  box-shadow: var(--shadow-card);
  display: flex; flex-direction: column; gap: 12px;
  transition: box-shadow var(--transition-base);
}
.mobile-card:active { transform: scale(0.99); }
.mobile-card-header { display: flex; justify-content: space-between; align-items: flex-start; }
.mobile-card-footer {
  display: flex; justify-content: space-between; align-items: flex-end;
  padding-top: 12px;
  border-top: 1px solid rgba(226,232,240,0.6);
}
.mobile-card-id { font-weight: 500; color: var(--color-on-surface); letter-spacing: -0.01em; }
.mobile-card-client { font-size: 13px; color: var(--color-on-surface-variant); margin-top: 2px; }
.mobile-card-date { font-size: 13px; color: var(--color-secondary); }
.mobile-card-amount { font-weight: 600; color: var(--color-on-surface); letter-spacing: -0.01em; }

/* ====================================================
   Section Header
   ==================================================== */
.section-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px;
}
.section-title { font-size: 20px; font-weight: 600; color: var(--color-on-surface); }
.section-link {
  font-size: var(--font-size-label-sm);
  font-weight: var(--font-weight-label-sm);
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-label-sm);
}
.section-link:hover { text-decoration: underline; }

/* ====================================================
   Page Header
   ==================================================== */
.page-header {
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 28px;
}
@media (min-width: 768px) {
  .page-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 32px;
  }
}
.page-title { font-size: var(--font-size-headline-lg); font-weight: 600; color: var(--color-on-surface); }
.page-subtitle { font-size: var(--font-size-body-md); color: var(--color-secondary); margin-top: 2px; }
.page-actions { display: flex; gap: 12px; align-items: center; }

/* ====================================================
   Buttons
   ==================================================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-body-md);
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover { opacity: 0.9; box-shadow: 0 2px 8px rgba(70,72,212,0.35); }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-workspace-border);
  color: var(--color-secondary);
}
.btn-secondary:hover { background: var(--color-surface-container); }

.btn-ghost { background: transparent; color: var(--color-secondary); }
.btn-ghost:hover { background: var(--color-surface-container); }

.btn-icon {
  width: 36px; height: 36px;
  padding: 0;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-on-surface-variant);
  border: 1px solid var(--color-workspace-border);
  background: var(--color-surface-container-lowest);
}
.btn-icon:hover { background: var(--color-surface-container); }

/* ====================================================
   Form Inputs
   ==================================================== */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label {
  font-size: var(--font-size-label-sm);
  font-weight: 600;
  color: var(--color-secondary);
  letter-spacing: var(--letter-spacing-label-sm);
  text-transform: uppercase;
}
.form-input {
  padding: 10px 12px;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  background: var(--color-surface-container-lowest);
  font-family: var(--font-family);
  font-size: var(--font-size-body-md);
  color: var(--color-on-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  width: 100%;
}
.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(70,72,212,0.12);
}
.form-input::placeholder { color: var(--color-outline); }

.form-select {
  padding: 10px 12px;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  background: var(--color-surface-container-lowest);
  font-family: var(--font-family);
  font-size: var(--font-size-body-md);
  color: var(--color-on-surface);
  outline: none;
  cursor: pointer;
  width: 100%;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23767586' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(70,72,212,0.12);
}

/* ====================================================
   Search Bar
   ==================================================== */
.search-bar {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-workspace-border);
  border-radius: var(--radius-xl);
  padding: 14px 16px;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.search-input-wrap { position: relative; flex: 1; min-width: 200px; }
.search-input-wrap .material-symbols-outlined {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  font-size: 18px; color: var(--color-outline); pointer-events: none;
}
.search-input-wrap input { padding-left: 36px; }

/* ====================================================
   Toast / Notification
   ==================================================== */
.toast-container {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center;
}
@media (min-width: 768px) { .toast-container { bottom: 24px; } }

.toast {
  background: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  padding: 12px 20px;
  border-radius: var(--radius-xl);
  font-size: var(--font-size-body-md);
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  animation: slideUp 0.3s ease;
  white-space: nowrap;
}
.toast--error { background: var(--color-error); color: var(--color-on-error); }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ====================================================
   Modal
   ==================================================== */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal-backdrop.active { display: flex; }

.modal {
  background: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.18);
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.modal-title { font-size: var(--font-size-headline-md); font-weight: 600; color: var(--color-on-surface); }
.modal-close {
  width: 32px; height: 32px;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-on-surface-variant);
  transition: background var(--transition-fast);
}
.modal-close:hover { background: var(--color-surface-container); }
.modal-body { display: flex; flex-direction: column; gap: 16px; }
.modal-footer { display: flex; gap: 12px; justify-content: flex-end; margin-top: 20px; }

/* ====================================================
   Loading State
   ==================================================== */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(70,72,212,0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.skeleton {
  background: linear-gradient(90deg, var(--color-surface-container) 25%, var(--color-surface-container-high) 50%, var(--color-surface-container) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-md);
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ====================================================
   Empty State
   ==================================================== */
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 64px 24px;
  text-align: center;
}
.empty-state .material-symbols-outlined { font-size: 48px; color: var(--color-outline); margin-bottom: 16px; }
.empty-state-title { font-size: 18px; font-weight: 600; color: var(--color-on-surface); margin-bottom: 8px; }
.empty-state-desc  { font-size: var(--font-size-body-md); color: var(--color-secondary); margin-bottom: 24px; }

/* ====================================================
   Utility Classes
   ==================================================== */
.hidden { display: none !important; }
@media (max-width: 767px) { .desktop-only { display: none !important; } }
@media (min-width: 768px) { .mobile-only  { display: none !important; } }
.flex   { display: flex; }
.gap-2  { gap: 8px; }
.gap-3  { gap: 12px; }
.gap-4  { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.mt-auto { margin-top: auto; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-error { color: var(--color-error); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.w-full { width: 100%; }