/* ==========================================================================
   EMSAL PRO - Global Theme & CSS Styling
   Aesthetic Architecture Dark/Light Mix with Ultra-Fast Rendering
   ========================================================================== */

:root {
  --primary-color: #37474f; /* Flutter blueGrey */
  --primary-hover: #263238;
  --primary-light: #eceff1;
  --accent-color: #0288d1;
  --bg-color: #f4f6f8;
  --card-bg: #ffffff;
  --text-primary: #212121;
  --text-secondary: #616161;
  --border-color: #cfd8dc;
  --error-color: #d32f2f;
  --error-bg: #ffebee;
  --warning-color: #f57c00;
  --warning-bg: #fff3e0;
  --success-color: #2e7d32;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
}

.logo-area h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.badge {
  background-color: var(--accent-color);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: middle;
}

.subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
}

.header-status {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 6px 12px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: #00e676;
  border-radius: 50%;
  box-shadow: 0 0 8px #00e676;
}

/* Main Container */
.main-container {
  max-width: 1000px;
  width: 100%;
  margin: 20px auto;
  padding: 0 15px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Card Styling */
.calculator-card, .result-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-header {
  margin-bottom: 20px;
}

.card-header h2 {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.card-header p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.optional {
  font-weight: normal;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.req {
  color: var(--error-color);
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(55, 71, 79, 0.15);
}

input.is-invalid {
  border-color: var(--error-color) !important;
  background-color: var(--error-bg);
}

.error-msg {
  font-size: 0.8rem;
  color: var(--error-color);
  margin-top: 4px;
  min-height: 18px;
}

/* Grid System */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
}

.divider {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 20px 0;
}

/* Input with Checkbox (Merdiven) */
.input-with-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-with-checkbox input[type="number"] {
  flex: 1;
}

.checkbox-inline {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.85rem;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

/* Custom Checkbox Grid */
.section-title h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary-color);
}

.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  user-select: none;
}

.custom-checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

/* Advanced Settings (Accordion) */
.advanced-settings {
  margin-top: 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: #fafafa;
}

.advanced-settings summary {
  padding: 12px 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.advanced-settings summary:hover {
  background-color: var(--primary-light);
}

.settings-body {
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border-color);
}

.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.range-title {
  min-width: 110px;
  font-size: 0.9rem;
}

.range-row input {
  max-width: 120px;
}

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

.disabled-input {
  background-color: #eee !important;
  color: var(--text-secondary) !important;
  font-style: italic;
  font-size: 0.85rem !important;
}

/* Zemin Kat Options */
.highlight-checkbox {
  font-weight: 700;
  color: var(--primary-color);
}

.zemin-panel {
  padding: 12px;
  background-color: var(--primary-light);
  border-radius: var(--radius-sm);
  margin-top: 10px;
}

/* Alerts */
.alert-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 15px;
}

.error-alert {
  background-color: var(--error-bg);
  color: var(--error-color);
  border: 1px solid var(--error-color);
}

.warning-alert {
  background-color: var(--warning-bg);
  color: var(--warning-color);
  border: 1px solid var(--warning-color);
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.btn {
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: inherit;
}

.btn-primary {
  flex: 2;
  background-color: var(--primary-color);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  flex: 1;
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--primary-light);
}

/* Result Card */
.result-card {
  background: var(--primary-light);
  border: 2px solid var(--primary-color);
  animation: fadeIn 0.3s ease;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.result-header h2 {
  font-size: 1.2rem;
  color: var(--primary-color);
  font-weight: 800;
}

.btn-icon {
  background: #fff;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: var(--primary-color);
  color: #fff;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 15px;
  text-transform: uppercase;
}

/* Metric Boxes */
.summary-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metric-box {
  background: #fff;
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.metric-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 4px;
}

.metric-box.highlight {
  border-color: var(--primary-color);
  background-color: #ffffff;
}

.metric-box.highlight .metric-value {
  color: var(--primary-color);
}

/* Plan Section */
.plan-section {
  margin-top: 15px;
}

.plan-section h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.subnote {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-item {
  background: #fff;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary-color);
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-line;
}

.disclaimer {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 20px;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--success-color);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: slideUp 0.3s ease;
}

/* Footer */
.app-footer {
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 10px 0;
  font-size: 0.85rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-name, .author {
  font-weight: 700;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* Responsive adjustments */
@media (max-width: 600px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .action-buttons {
    flex-direction: column-reverse;
  }

  .footer-container {
    flex-direction: column;
    gap: 5px;
    text-align: center;
  }

  .range-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .range-row input {
    max-width: 100%;
  }
}