/* =========================================================================
   Portal Należności — Subiekt GT
   Design System & Styles
   ========================================================================= */

/* --- Zmienne --- */
:root {
  /* Kolory */
  --bg-primary: #080c1a;
  --bg-secondary: #0d1229;
  --bg-card: rgba(16, 22, 48, 0.65);
  --bg-card-hover: rgba(22, 30, 60, 0.75);
  --border-card: rgba(99, 130, 255, 0.12);
  --border-card-hover: rgba(99, 130, 255, 0.25);

  --text-primary: #e8ecf4;
  --text-secondary: #8892b0;
  --text-muted: #5a6480;

  --accent: #6c8cff;
  --accent-glow: rgba(108, 140, 255, 0.25);
  --success: #2dd4a8;
  --success-bg: rgba(45, 212, 168, 0.1);
  --danger: #ff5370;
  --danger-bg: rgba(255, 83, 112, 0.1);
  --warning: #ffcb6b;
  --warning-bg: rgba(255, 203, 107, 0.1);

  /* Typografia */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-sm: 0.8125rem;
  --font-base: 0.9375rem;
  --font-lg: 1.125rem;
  --font-xl: 1.5rem;
  --font-2xl: 2rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px var(--accent-glow);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Animated Background Shapes --- */
.bg-shapes {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.3;
  animation: float 20s ease-in-out infinite;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: -150px;
  right: -100px;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #a855f7 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
  animation-delay: -7s;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--success) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
  opacity: 0.15;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(15px, 30px) scale(1.02); }
}

/* --- Container --- */
.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-lg);
}

/* --- Glass Card --- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
  border-color: var(--border-card-hover);
}

/* --- Header --- */
.header {
  margin-bottom: var(--space-xl);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-glow);
}

.company-name {
  font-size: var(--font-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  font-weight: 400;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--success-bg);
  border: 1px solid rgba(45, 212, 168, 0.2);
  border-radius: 100px;
  font-size: var(--font-sm);
  color: var(--success);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* --- Auth / Error Screens --- */
.auth-screen,
.error-screen {
  display: flex;
  justify-content: center;
  padding-top: 10vh;
}

.auth-card,
.error-card {
  max-width: 440px;
  padding: var(--space-2xl);
  text-align: center;
}

.auth-icon,
.error-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-icon {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(255, 203, 107, 0.2);
}

.error-icon {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(255, 83, 112, 0.2);
}

.auth-card h2,
.error-card h2 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-md);
}

.auth-card p,
.error-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

/* --- Loading --- */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 20vh;
}

.loader {
  text-align: center;
}

.loader-ring {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-card);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
  animation: spin 0.8s linear infinite;
}

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

.loader p {
  color: var(--text-secondary);
  font-size: var(--font-base);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-sm);
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #a855f7);
  color: white;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: var(--space-xs) var(--space-md);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-ghost.active {
  color: var(--accent);
  background: rgba(108, 140, 255, 0.1);
  border-color: rgba(108, 140, 255, 0.2);
}

/* --- Contractor Info --- */
.contractor-info {
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-lg);
}

.contractor-details {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.contractor-avatar {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-xl);
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.contractor-name {
  font-size: var(--font-lg);
  font-weight: 600;
  margin-bottom: 2px;
}

.contractor-meta {
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

/* --- Summary Cards --- */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.summary-card {
  padding: var(--space-lg) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a855f7);
  opacity: 0.6;
}

.summary-card.overdue::before {
  background: linear-gradient(90deg, var(--danger), #ff8a65);
}

.summary-card.current::before {
  background: linear-gradient(90deg, var(--success), #69f0ae);
}

.summary-label {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.summary-value {
  font-size: var(--font-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}

.summary-card.overdue .summary-value {
  color: var(--danger);
}

.summary-card.current .summary-value {
  color: var(--success);
}

.summary-sub {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

/* --- Invoices Section --- */
.invoices-section {
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.invoices-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.invoices-header h3 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-lg);
  font-weight: 600;
}

.invoices-controls {
  display: flex;
  gap: var(--space-xs);
}

/* --- Table --- */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.invoices-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-sm);
}

.invoices-table th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-card);
  white-space: nowrap;
}

.invoices-table td {
  padding: var(--space-md);
  border-bottom: 1px solid rgba(99, 130, 255, 0.06);
  white-space: nowrap;
}

.invoices-table tbody tr {
  transition: background var(--transition-fast);
}

.invoices-table tbody tr:hover {
  background: rgba(108, 140, 255, 0.04);
}

.invoices-table tbody tr:last-child td {
  border-bottom: none;
}

.text-right {
  text-align: right !important;
}

/* Kwota do zapłaty */
.amount-due {
  font-weight: 600;
  color: var(--text-primary);
}

.amount-paid {
  color: var(--text-secondary);
}

/* Status badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.status-badge.overdue {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(255, 83, 112, 0.2);
}

.status-badge.current {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(45, 212, 168, 0.2);
}

.status-badge.warning {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(255, 203, 107, 0.2);
}

/* Row overdue indicator */
.invoices-table tbody tr.row-overdue {
  background: rgba(255, 83, 112, 0.03);
}

.invoices-table tbody tr.row-overdue:hover {
  background: rgba(255, 83, 112, 0.06);
}

/* --- Mobile Cards --- */
.mobile-cards {
  display: none;
}

.mobile-invoice-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  transition: border-color var(--transition-fast);
}

.mobile-invoice-card:hover {
  border-color: var(--border-card-hover);
}

.mobile-invoice-card.overdue {
  border-left: 3px solid var(--danger);
}

.mobile-invoice-card.current {
  border-left: 3px solid var(--success);
}

.mobile-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.mobile-card-number {
  font-weight: 600;
  font-size: var(--font-base);
}

.mobile-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.mobile-card-field {
  font-size: var(--font-sm);
}

.mobile-card-field .label {
  color: var(--text-muted);
  font-size: 0.75rem;
  display: block;
  margin-bottom: 2px;
}

.mobile-card-field .value {
  color: var(--text-primary);
}

.mobile-card-field .value.highlight {
  font-weight: 600;
  font-size: var(--font-base);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-secondary);
}

.empty-state svg {
  color: var(--success);
  margin-bottom: var(--space-md);
  opacity: 0.6;
}

.empty-state p {
  font-size: var(--font-base);
}

/* --- Footer --- */
.footer {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--text-muted);
  font-size: var(--font-sm);
  line-height: 1.8;
}

/* --- Animations --- */
.fade-in {
  animation: fadeInUp var(--transition-slow) ease forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .container {
    padding: var(--space-md);
  }

  .summary-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .summary-value {
    font-size: var(--font-xl);
  }

  .invoices-section {
    padding: var(--space-md);
  }

  .invoices-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .invoices-controls {
    width: 100%;
    overflow-x: auto;
  }

  .table-wrapper {
    display: none;
  }

  .mobile-cards {
    display: block;
  }

  .contractor-info {
    padding: var(--space-md);
  }

  .contractor-avatar {
    width: 42px;
    height: 42px;
    font-size: var(--font-lg);
  }

  .header-badge {
    display: none;
  }

  .company-name {
    font-size: var(--font-lg);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
  }

  .logo-icon svg {
    width: 22px;
    height: 22px;
  }
}

/* --- Print --- */
@media print {
  .bg-shapes,
  .header-badge,
  .invoices-controls,
  .mobile-cards,
  .footer {
    display: none !important;
  }

  body {
    background: white;
    color: #1a1a1a;
  }

  .glass-card {
    background: white;
    border: 1px solid #ddd;
    backdrop-filter: none;
    box-shadow: none;
  }

  .table-wrapper {
    display: block !important;
  }

  .invoices-table th {
    color: #666;
  }

  .company-name {
    -webkit-text-fill-color: #1a1a1a;
    background: none;
  }

  .summary-card.overdue .summary-value {
    color: #cc0000;
  }

  .summary-card.current .summary-value {
    color: #008844;
  }
}