/* style.css */
:root {
  /* Default: Dark Theme */
  --bg-primary: #0b0f19;
  --bg-card: #151d30;
  --bg-input: #0f172a;
  --accent-color: #10b981;
  --accent-glow: rgba(16, 185, 129, 0.3);
  --blue-color: #0ea5e9;
  --blue-glow: rgba(14, 165, 233, 0.3);
  --yellow-color: #f59e0b;
  --yellow-glow: rgba(245, 158, 11, 0.3);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #1e293b;
  --border-highlight: #334155;
  --font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

/* Light Theme Variables */
body.light-theme {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-highlight: #cbd5e1;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  padding-bottom: 3rem;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

/* App Header */
.app-header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-area .subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

/* Theme Toggle Button */
.theme-toggle {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background-color: var(--border-highlight);
}

/* Container & Layout */
.main-container {
  max-width: 1400px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
}

.tabs-navigation {
  display: flex;
  gap: 8px;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn:hover {
  background-color: var(--border-highlight);
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--border-color);
  color: var(--accent-color);
  box-shadow: inset 0 -2px 0 var(--accent-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.grid-layout {
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: 1.5rem;
}

/* Card Styles */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.card-header {
  margin-bottom: 1.25rem;
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-header p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Preset Buttons Grid */
.preset-buttons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.btn {
  padding: 0.65rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.btn-preset {
  background-color: var(--bg-input);
  color: var(--text-secondary);
}

.btn-preset:hover,
.btn-preset.active {
  background-color: var(--border-highlight);
  color: var(--text-primary);
  border-color: var(--accent-color);
}

.btn-preset.active {
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Form Controls */
.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

input,
select {
  width: 100%;
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  font-size: 0.9rem;
  outline: none;
  height: 44px;
  transition:
    border-color 0.2s ease,
    background-color 0.3s ease,
    color 0.3s ease;
}

input:focus,
select:focus {
  border-color: var(--accent-color);
}

.btn-primary {
  width: 100%;
  background-color: var(--accent-color);
  color: #000;
  border: none;
  padding: 0.85rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 0.5rem;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

/* Stepper Waterfall */
.waterfall-stepper {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 1rem;
}

.step-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 8px;
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.step-box.total {
  border-color: var(--accent-color);
  background-color: rgba(16, 185, 129, 0.03);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.05);
}

.step-num {
  font-size: 0.7rem;
  background-color: var(--border-highlight);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
}

.step-box.total .step-num {
  background-color: var(--accent-color);
  color: #000;
}

.step-desc {
  flex: 1;
  margin-left: 1rem;
}

.step-desc h4 {
  font-size: 0.85rem;
  font-weight: 600;
}

.step-desc p {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.step-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.step-value.positive {
  color: var(--blue-color);
}

.step-value.total-val {
  color: var(--accent-color);
}

.alert-info-box {
  display: flex;
  gap: 10px;
  background-color: rgba(14, 165, 233, 0.05);
  border: 1px dashed var(--blue-color);
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1.5rem;
}

.alert-info-box p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Results Section Tab 2 */
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}

.results-header h3 {
  font-size: 1.15rem;
}

.btn-download {
  background-color: var(--border-highlight);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.btn-download:hover {
  background-color: var(--accent-color);
  color: #000;
}

.kpi-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 1.25rem;
}

.kpi-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.85rem;
  border-radius: 8px;
  text-align: center;
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.kpi-box.text-blue {
  border-color: var(--blue-color);
  box-shadow: 0 0 10px var(--blue-glow);
}

.kpi-box.text-yellow {
  border-color: var(--yellow-color);
  box-shadow: 0 0 10px var(--yellow-glow);
}

.kpi-box.text-green {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

.kpi-title {
  display: block;
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.kpi-val {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  margin-top: 0.25rem;
}

.kpi-box.text-blue .kpi-val {
  color: var(--blue-color);
}
.kpi-box.text-yellow .kpi-val {
  color: var(--yellow-color);
}
.kpi-box.text-green .kpi-val {
  color: var(--accent-color);
}

/* Table Wrapper */
.table-wrapper {
  overflow-x: auto;
  border-radius: 8px;
  margin-bottom: 1.25rem;
}

.report-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.report-table th,
.report-table td {
  padding: 0.6rem 0.85rem;
}

.report-table th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.72rem;
}

/* Disclaimer & Footer */
.report-footer {
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
  margin-top: 1.5rem;
}

.disclaimer {
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

.copyright {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Placeholder */
.placeholder-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
}

.placeholder-content .placeholder-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.placeholder-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.placeholder-content p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  max-width: 400px;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }
}