@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-primary: #e07b4a;
  --color-primary-rgb: 224, 123, 74;
  --color-primary-hover: #c96a3d;
  --color-primary-light: #fff0e6;
  --color-secondary: #8b5e3c;
  --color-accent: #f4a460;

  --color-bg: #fdf6f0;
  --color-surface: #ffffff;
  --color-sidebar: #2d1b0e;
  --color-sidebar-hover: #3d2817;
  --color-sidebar-active: var(--color-primary);

  --color-text: #3d2b1a;
  --color-text-muted: #8a7a6a;
  --color-border: #e8ddd0;
  --color-success: #2e7d32;
  --color-danger: #c62828;

  --sidebar-width: 260px;
  --header-height: 64px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --color-bg: #1a0f08;
  --color-surface: #2d1b0e;
  --color-sidebar: #0f0804;
  --color-sidebar-hover: #1f1108;
  --color-text: #f5ede6;
  --color-text-muted: #a89888;
  --color-border: #3d2817;
  --color-primary-light: #3d2817;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
  margin: 0;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
}

/* ─── SIDEBAR ──────────────────────── */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
}

.sidebar-brand {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-brand h2 {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
  font-size: 1.5rem;
}

.sidebar-brand small {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  position: relative;
}

.sidebar-nav .nav-item:hover {
  background: var(--color-sidebar-hover);
  color: rgba(255,255,255,0.9);
}

.sidebar-nav .nav-item.active {
  background: rgba(224,123,74,0.15);
  color: var(--color-primary);
}

.sidebar-nav .nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--color-primary);
  border-radius: 0 3px 3px 0;
}

.sidebar-nav .nav-item i {
  width: 20px;
  text-align: center;
  font-size: 1.1rem;
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.dark-mode-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 8px 0;
}

.dark-mode-toggle input[type="checkbox"] {
  appearance: none;
  width: 40px;
  height: 22px;
  background: rgba(255,255,255,0.15);
  border-radius: 11px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
  flex-shrink: 0;
}

.dark-mode-toggle input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
}

.dark-mode-toggle input[type="checkbox"]:checked {
  background: var(--color-primary);
}

.dark-mode-toggle input[type="checkbox"]:checked::after {
  transform: translateX(18px);
}

/* ─── MAIN CONTENT ──────────────────── */

.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: 0;
}

.main-header {
  background: var(--color-surface);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1020;
  transition: background var(--transition), border-color var(--transition);
}

.main-header .page-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.4rem;
  margin: 0;
}

.main-header .user-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.main-header .user-info .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
}

.main-body {
  padding: 28px 32px;
}

/* ─── SUMMARY CARDS ────────────────── */

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.summary-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.summary-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.summary-card .card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.summary-card .card-icon.orange { background: rgba(224,123,74,0.15); color: var(--color-primary); }
.summary-card .card-icon.green { background: rgba(46,125,50,0.12); color: var(--color-success); }
.summary-card .card-icon.blue { background: rgba(33,150,243,0.12); color: #2196f3; }
.summary-card .card-icon.purple { background: rgba(156,39,176,0.12); color: #9c27b0; }

.summary-card .card-value {
  font-family: 'Playfair Display', serif;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2px;
  transition: color var(--transition);
}

.summary-card .card-label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ─── CHARTS ────────────────────────── */

.chart-container {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  margin-bottom: 28px;
  transition: background var(--transition), border-color var(--transition);
}

.chart-container h5 {
  margin-bottom: 16px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
}

/* ─── SECTION HEADER ────────────────── */

.gas-config-card {
  max-width: 720px;
}

.gas-cost-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-secondary);
}

.gas-cost-preview strong {
  color: var(--color-primary);
  font-size: 1.25rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-header h4 {
  margin: 0;
  font-size: 1.15rem;
}

/* ─── TABLES ────────────────────────── */

.table-container {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: background var(--transition), border-color var(--transition);
  margin-bottom: 28px;
}

.table-container .table-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.table-container .table-header h5 {
  margin: 0;
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.table-container table {
  margin: 0;
}

.table-container .table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--color-text);
  --bs-table-border-color: var(--color-border);
  --bs-table-striped-bg: rgba(224,123,74,0.03);
  --bs-table-hover-bg: rgba(224,123,74,0.06);
}

.table-container .table thead th {
  background: var(--color-primary-light);
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 2px solid var(--color-primary);
  padding: 12px 16px;
}

.table-container .table td {
  padding: 12px 16px;
  vertical-align: middle;
}

[data-theme="dark"] .table-container .table thead th {
  background: rgba(224,123,74,0.12);
}

/* ─── SKELETON LOADING ─────────────── */

.skeleton {
  background: linear-gradient(90deg, 
    var(--color-border) 25%, 
    rgba(224,123,74,0.1) 50%, 
    var(--color-border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-md);
}

.skeleton-table-row {
  height: 48px;
  margin-bottom: 4px;
  border-radius: 4px;
}

.skeleton-chart {
  height: 250px;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ─── BUTTONS ───────────────────────── */

.btn {
  font-weight: 500;
  border-radius: var(--radius-sm);
  padding: 8px 20px;
  transition: all var(--transition);
  font-size: 0.875rem;
}

.btn-primary {
  --bs-btn-bg: var(--color-primary);
  --bs-btn-border-color: var(--color-primary);
  --bs-btn-hover-bg: var(--color-primary-hover);
  --bs-btn-hover-border-color: var(--color-primary-hover);
  --bs-btn-active-bg: #b85d34;
  --bs-btn-active-border-color: #b85d34;
}

.btn-outline-primary {
  --bs-btn-color: var(--color-primary);
  --bs-btn-border-color: var(--color-primary);
  --bs-btn-hover-bg: var(--color-primary);
  --bs-btn-hover-border-color: var(--color-primary);
  --bs-btn-active-bg: var(--color-primary-hover);
}

.btn-sm {
  padding: 5px 12px;
  font-size: 0.8rem;
}

/* ─── MODALS ────────────────────────── */

.modal-content {
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom-color: var(--color-border);
  padding: 20px 24px 16px;
}

.modal-header .modal-title {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
}

.modal-body {
  padding: 16px 24px;
}

.modal-footer {
  border-top-color: var(--color-border);
  padding: 16px 24px 20px;
}

.form-control, .form-select {
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 10px 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-size: 0.9rem;
}

.form-control:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(224,123,74,0.15);
  background: var(--color-bg);
  color: var(--color-text);
}

.form-label {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.form-text {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

/* ─── ALERTS / TOASTS ──────────────── */

.alert {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  min-width: 300px;
  box-shadow: var(--shadow-lg);
  border: none;
  border-radius: var(--radius-sm);
  animation: slideInRight 0.3s ease;
  font-size: 0.9rem;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.alert-success { background: #e8f5e9; color: #1b5e20; }
.alert-danger { background: #fbe9e7; color: #b71c1c; }
.alert-warning { background: #fff3e0; color: #e65100; }

/* ─── TABS (sin sidebar) ─────────── */

.section-tabs {
  display: none;
}

/* ─── HAMBURGER ──────────────────── */

.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px;
}

/* ─── RESPONSIVE ────────────────────── */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1035;
  }

  .sidebar-overlay.show {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .sidebar-toggle {
    display: block;
  }

  .main-body {
    padding: 20px 16px;
  }

  .main-header {
    padding: 12px 16px;
  }

  .summary-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .summary-card {
    padding: 16px;
  }

  .summary-card .card-value {
    font-size: 1.3rem;
  }
}

/* ─── LANDING PAGE ──────────────────── */

.landing-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #fdf6f0 0%, #f5e6d0 100%);
  padding: 40px 20px;
}

[data-theme="dark"] .landing-hero {
  background: linear-gradient(135deg, #1a0f08 0%, #2d1b0e 100%);
}

.landing-hero .hero-content {
  text-align: center;
  max-width: 600px;
}

.landing-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.landing-hero .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-family: 'Inter', sans-serif;
}

.landing-hero .hero-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.landing-hero .hero-btns .btn {
  padding: 12px 32px;
  font-size: 1rem;
  border-radius: 50px;
}

.landing-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.landing-features .feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.landing-features .feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.landing-features .feature-card .feature-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.landing-features .feature-card h5 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
}

.landing-features .feature-card p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0;
}

@media (max-width: 768px) {
  .landing-hero h1 { font-size: 2.2rem; }
  .landing-features { grid-template-columns: 1fr; }
}

/* ─── AUTH PAGES ──────────────────── */

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #fdf6f0 0%, #f5e6d0 100%);
  padding: 20px;
}

[data-theme="dark"] .auth-page {
  background: linear-gradient(135deg, #1a0f08 0%, #2d1b0e 100%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
}

.auth-card .auth-logo {
  text-align: center;
  margin-bottom: 28px;
}

.auth-card .auth-logo h2 {
  font-family: 'Playfair Display', serif;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0;
  font-size: 2rem;
}

.auth-card .auth-logo p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 4px 0 0;
}

.auth-card .auth-link {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.auth-card .auth-link a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.auth-card .auth-link a:hover {
  text-decoration: underline;
}

/* ─── SCROLLBAR ─────────────────────── */

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }