/* ==========================================================================
   SmartFreelance Calc - Premium CSS Design System
   ========================================================================== */

/* 1. Design System Tokens & Themes */
:root {
  /* Fonts */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Transitions */
  --transition-speed: 0.25s;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-all: all var(--transition-speed) var(--transition-smooth);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
  
  /* Theme-dependent tokens (Default: Dark Mode) */
  --bg-app: #07080d;
  --bg-card: rgba(18, 20, 32, 0.5);
  --bg-card-hover: rgba(26, 28, 45, 0.65);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --accent-color: #06b6d4;
  
  --success-color: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --error-color: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  
  --divider-color: rgba(255, 255, 255, 0.08);
  --input-bg: rgba(10, 11, 18, 0.8);
  --input-focus-border: #6366f1;
  --input-focus-shadow: rgba(99, 102, 241, 0.25);
  
  --glass-blur: blur(20px);
  --glass-saturate: saturate(180%);
}

/* Light Mode Override */
body.light-mode {
  --bg-app: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(15, 23, 42, 0.15);
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --accent-color: #0891b2;
  
  --success-color: #059669;
  --success-bg: rgba(5, 150, 105, 0.1);
  --error-color: #dc2626;
  --error-bg: rgba(220, 38, 38, 0.1);
  
  --divider-color: rgba(15, 23, 42, 0.08);
  --input-bg: #ffffff;
  --input-focus-border: #4f46e5;
  --input-focus-shadow: rgba(79, 70, 229, 0.2);
  
  --shadow-glow: 0 10px 30px rgba(79, 70, 229, 0.05);
}

/* 2. Global Resets & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-block-size: 100vh;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  inline-size: 8px;
  block-size: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-app);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-all);
}
a:hover {
  color: var(--accent-color);
}

/* Logical Helpers */
.hidden {
  display: none !important;
}

.whitespace-pre {
  white-space: pre-wrap;
}

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

.text-green {
  color: var(--success-color);
}

.text-red {
  color: var(--error-color);
}

.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* 3. Common UI Elements */
.card {
  background-color: var(--bg-card);
  backdrop-filter: var(--glass-blur) var(--glass-saturate);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-glow);
  transition: border var(--transition-speed), background-color var(--transition-speed), transform 0.3s;
}
.card:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
}

/* Form Styling - Gestalt Proximity Rule applied */
.form-group {
  margin-block-end: 1.5rem; /* Large spacing between groups */
}

.form-group label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  margin-block-end: 0.35rem; /* Tight spacing between label and input */
  color: var(--text-main);
  transition: color var(--transition-speed);
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-block-end: 0.35rem;
}

.label-row label {
  margin-block-end: 0;
}

.value-badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.15rem 0.6rem;
  background-color: var(--success-bg);
  color: var(--success-color);
  border-radius: var(--radius-sm);
}

.field-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-block-start: 0.35rem;
}

/* Inputs & Selects */
input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  inline-size: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--input-bg);
  color: var(--text-main);
  outline: none;
  transition: var(--transition-all);
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
select:focus,
textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-shadow);
}

/* High Contrast Focus Outline for Keyboard Users */
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

/* Range Input / Slider Customization */
.slider {
  -webkit-appearance: none;
  inline-size: 100%;
  block-size: 6px;
  background: var(--divider-color);
  outline: none;
  border-radius: var(--radius-full);
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  inline-size: 20px;
  block-size: 20px;
  border-radius: var(--radius-full);
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
  transition: background 0.15s, transform 0.15s;
}

.slider::-webkit-slider-thumb:hover {
  background: var(--accent-color);
  transform: scale(1.15);
}

.input-addon-symbol {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Buttons */
.btn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition-all);
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-inverse);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--border-color);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: var(--border-hover);
  border-color: var(--border-hover);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  display: flex;
  inline-size: 100%;
}

.divider {
  border: none;
  border-block-start: 1px solid var(--divider-color);
  margin-block: 1.5rem;
}

.badge {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--divider-color);
  color: var(--text-muted);
}

/* 4. Layout & Header */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-inline-size: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  font-size: 1.75rem;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
}

/* Theme Switcher Button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-all);
}
.theme-toggle-btn:hover {
  background-color: var(--border-color);
}
body.dark-mode .sun-icon { display: block; }
body.dark-mode .moon-icon { display: none; }
body.light-mode .sun-icon { display: none; }
body.light-mode .moon-icon { display: block; }

/* Main Section */
.app-main {
  max-inline-size: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.hero-section {
  text-align: center;
  margin-block-end: 3rem;
}

.hero-title {
  font-size: 2.75rem;
  margin-block-end: 0.75rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-inline-size: 650px;
  margin: 0 auto;
}

/* 5. Calculator Grid Layout */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-block-end: 3rem;
}

@media (min-width: 900px) {
  .calculator-grid {
    grid-template-columns: 1fr 1.2fr;
  }
}

/* Results Formatting */
.results-header {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-block-end: 1.5rem;
}

@media (min-width: 480px) {
  .results-header {
    flex-direction: row;
    align-items: center;
  }
}

.tabs {
  display: flex;
  background-color: var(--divider-color);
  border-radius: var(--radius-md);
  padding: 0.25rem;
}

.tab-btn {
  background: none;
  border: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-all);
}

.tab-btn.active {
  background-color: var(--bg-app);
  color: var(--text-main);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.results-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 600px) {
  .results-body {
    grid-template-columns: 1.3fr 1fr;
  }
}

.breakdown-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.result-row.column-layout {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.2rem;
}

.row-top-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.row-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: left;
}

.result-row .amount {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-main);
}

.net-row {
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
}

.net-row .amount {
  font-size: 1.75rem;
}

.net-value-container {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
}

/* 6. Dynamic Donut Chart */
.chart-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.donut-chart {
  max-inline-size: 160px;
  aspect-ratio: 1;
}

.chart-bg {
  fill: none;
  stroke: var(--divider-color);
  stroke-width: 14;
}

.chart-slice {
  fill: none;
  stroke-width: 14;
  stroke-linecap: round;
  transition: stroke-dasharray 0.6s ease-in-out;
  /* Circular values: 2 * PI * r = 2 * 3.14159 * 65 = 408.4 */
  stroke-dasharray: 0 408.4;
}

.net-slice {
  stroke: #06b6d4;
}

.tax-slice {
  stroke: #f43f5e;
}

.social-slice {
  stroke: #a855f7;
}

.chart-text {
  text-anchor: middle;
  dominant-baseline: middle;
}

.chart-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  fill: var(--text-main);
}

.chart-label {
  font-size: 0.75rem;
  font-weight: 500;
  fill: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chart-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-start: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-dot {
  inline-size: 8px;
  block-size: 8px;
  border-radius: var(--radius-full);
}

.net-dot { background-color: #06b6d4; }
.tax-dot { background-color: #f43f5e; }
.social-dot { background-color: #a855f7; }

/* 7. Sponsored Ad Unit */
.ad-container {
  margin-block-end: 3rem;
}

.ad-unit {
  position: relative;
  background-color: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  overflow: hidden;
}

.ad-badge {
  position: absolute;
  inset-block-start: 0.5rem;
  inset-inline-end: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.ad-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

@media (min-width: 600px) {
  .ad-content {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.ad-icon {
  font-size: 2.25rem;
}

.ad-text {
  flex: 1;
}

.ad-title {
  font-size: 1.15rem;
  margin-block-end: 0.25rem;
}

.ad-description {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-inline-size: 600px;
}

/* 8. SEO FAQ Section (Accordion) */
.seo-faq-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-block-end: 3rem;
}

.section-title {
  font-size: 1.75rem;
  margin-block-end: 1.5rem;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border-block-end: 1px solid var(--divider-color);
  padding-block-end: 1rem;
}

.faq-item:last-child {
  border: none;
  padding-block-end: 0;
}

.faq-question {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  padding-block: 0.5rem;
  user-select: none;
  transition: color var(--transition-speed);
  list-style: none; /* Hide default arrow */
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::-webkit-details-marker {
  display: none; /* Hide default arrow in Safari */
}

.faq-question:hover {
  color: var(--primary-color);
}

.faq-question::after {
  content: '▼';
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.faq-item[open] .faq-question::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding-block-start: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* 9. Footer */
.app-footer {
  border-block-start: 1px solid var(--divider-color);
  padding: 2.5rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-container {
  max-inline-size: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-block-start: 1rem;
}

.footer-separator {
  color: var(--divider-color);
}

/* 10. Modal Styles */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(7, 8, 13, 0.75);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  inline-size: 100%;
  max-inline-size: 1050px;
  max-block-size: 90vh;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  animation: modalSlide 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

@keyframes modalSlide {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  padding: 1.5rem 2rem;
  border-block-end: 1px solid var(--divider-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.close-btn {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-main);
}

.modal-grid {
  display: grid;
  grid-template-columns: 1fr;
  flex: 1;
  overflow: hidden;
}

@media (min-width: 850px) {
  .modal-grid {
    grid-template-columns: 1fr 1.1fr;
  }
}

.invoice-form {
  padding: 2rem;
  overflow-y: auto;
  border-inline-end: 1px solid var(--divider-color);
}

.subsection-title {
  font-size: 1.25rem;
  margin-block-end: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: end;
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-divider {
  border: none;
  border-block-start: 1px dashed var(--divider-color);
  margin-block: 1.25rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-block-end: 0.75rem;
}

.checkbox-row input[type="checkbox"] {
  inline-size: 18px;
  block-size: 18px;
  cursor: pointer;
}

.checkbox-row label {
  margin-block-end: 0;
  cursor: pointer;
  font-size: 0.9rem;
}

/* Live Preview Area */
.invoice-preview-container {
  padding: 2rem;
  background-color: rgba(0,0,0,0.15);
  overflow-y: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.invoice-sheet {
  background-color: #ffffff;
  color: #0f172a;
  inline-size: 100%;
  max-inline-size: 210mm; /* A4 Ratio */
  min-block-size: 260mm;
  padding: 2.5rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.25);
  border-radius: 4px;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
}

.invoice-sheet-header {
  display: flex;
  justify-content: space-between;
  margin-block-end: 2.5rem;
}

.inv-company-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin-block-end: 0.25rem;
  color: #0f172a;
}

.inv-sender-details p {
  color: #475569;
}

.inv-meta {
  text-align: right;
}

.inv-title {
  font-size: 2rem;
  font-weight: 800;
  margin-block-end: 0.5rem;
  color: #0f172a;
  letter-spacing: -0.01em;
}

.inv-meta p {
  margin-block-end: 0.25rem;
  color: #475569;
}

.invoice-sheet-client {
  margin-block-end: 2.5rem;
  background-color: #f8fafc;
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  border-inline-start: 4px solid #4f46e5;
}

.section-micro-title {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: #64748b;
  margin-block-end: 0.5rem;
}

.invoice-sheet-client h4 {
  font-size: 1.1rem;
  margin-block-end: 0.25rem;
  color: #0f172a;
}

.invoice-sheet-client p {
  color: #475569;
}

/* Table */
.invoice-table {
  inline-size: 100%;
  border-collapse: collapse;
  margin-block-end: 2.5rem;
}

.invoice-table th {
  background-color: #f1f5f9;
  font-family: var(--font-display);
  font-weight: 700;
  text-align: left;
  padding: 0.75rem 1rem;
  color: #334155;
  border-block-end: 2px solid #cbd5e1;
}

.invoice-table td {
  padding: 1rem;
  border-block-end: 1px solid #e2e8f0;
  color: #334155;
  vertical-align: top;
}

.description-subtext {
  font-size: 0.75rem;
  color: #64748b;
  margin-block-start: 0.25rem;
}

/* Totals */
.invoice-totals {
  display: flex;
  justify-content: flex-end;
  margin-block-end: auto; /* Push footer down */
}

.totals-grid {
  inline-size: 100%;
  max-inline-size: 300px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: #475569;
}

.totals-divider {
  border: none;
  border-block-start: 1px solid #cbd5e1;
  margin-block: 0.5rem;
}

.total-amount-row {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: #0f172a;
}

.invoice-sheet-footer {
  margin-block-start: 3rem;
  border-block-start: 1px solid #e2e8f0;
  padding-block-start: 1rem;
  color: #64748b;
  font-size: 0.75rem;
  line-height: 1.4;
}

.reverse-charge-notice {
  font-style: italic;
  margin-block-end: 0.5rem;
}

/* Detailed Invoice Styles */
.invoice-items-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.invoice-item-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.invoice-item-row input {
  padding: 0.5rem;
  font-size: 0.9rem;
}

.invoice-item-desc {
  flex: 2;
}

.invoice-item-hours {
  flex: 0.5;
  min-width: 60px;
}

.invoice-item-rate {
  flex: 0.8;
  min-width: 80px;
}

.invoice-item-delete {
  background: none;
  border: none;
  color: var(--error-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.invoice-item-delete:hover {
  opacity: 0.8;
}

/* Expense Builder Styles */
.expenses-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.expenses-total-badge {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-color);
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.25);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
}

.expenses-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-block-end: 0.5rem;
}

.expense-item-row {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.expense-item-row select,
.expense-item-row input {
  padding: 0.45rem;
  font-size: 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-color);
  font-family: var(--font-sans);
}

.expense-item-row select:focus,
.expense-item-row input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.expense-category-select {
  flex: 1.5;
  min-width: 100px;
}

.expense-amount-input {
  flex: 1;
  min-width: 60px;
}

.expense-timeframe-select {
  flex: 1;
  min-width: 80px;
}

.expense-row-delete {
  background: none;
  border: none;
  color: var(--error-color);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 0 0.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s;
}

.expense-row-delete:hover {
  transform: scale(1.15);
}

/* Switch Toggle styling */
.switch-container {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
}
.switch-container input {
  opacity: 0;
  width: 0;
  height: 0;
}
.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: .25s;
  border-radius: var(--radius-full);
}
.switch-slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .25s;
  border-radius: 50%;
}
input:checked + .switch-slider {
  background-color: var(--primary-color);
}
input:checked + .switch-slider:before {
  transform: translateX(22px);
}

/* Comparison Card Styles */
.comparison-card {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(168, 85, 247, 0.05));
  border: 1px dashed rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  margin-block: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.comparison-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
  margin-bottom: 0.2rem;
}
.comparison-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-color);
}
.comparison-text {
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--text-muted);
  margin: 0;
}
.comparison-highlight {
  color: var(--accent-color);
  font-weight: 700;
}

/* Invoice History styling */
.invoice-history-container {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  margin-block: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border-color);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}


/* ==========================================================================
   10.5. Hourly Rate Goal Calculator
   ========================================================================== */
.goal-calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .goal-calc-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.goal-calc-subtitle {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-main);
}

.goal-calc-results {
  transition: border-color var(--transition-speed);
}

.goal-calc-results:hover {
  border-color: rgba(168, 85, 247, 0.4) !important;
}

.goal-result-value {
  font-family: var(--font-display);
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-main), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.goal-breakdown-details {
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

/* Flex Input Group for Currency Selector & Input */
.input-group {
  display: flex;
  align-items: stretch;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
  overflow: hidden;
  height: 42px;
}

.input-group:focus-within {
  border-color: var(--input-focus-border) !important;
  box-shadow: 0 0 0 3px var(--input-focus-shadow) !important;
}

.input-group select {
  border: none !important;
  background: rgba(255, 255, 255, 0.04) !important;
  color: var(--text-main) !important;
  padding: 0 0.75rem !important;
  font-weight: 600 !important;
  cursor: pointer !important;
  border-right: 1px solid var(--border-color) !important;
  border-radius: 0 !important;
  outline: none !important;
  margin: 0 !important;
  width: auto !important;
  font-size: 0.9rem !important;
  font-family: var(--font-display) !important;
}

.input-group select:focus {
  background: rgba(255, 255, 255, 0.08) !important;
}

.input-group select option {
  background-color: #0d0e16 !important;
  color: var(--text-main) !important;
}

.input-group input {
  border: none !important;
  background: transparent !important;
  color: var(--text-main) !important;
  padding: 0 0.75rem !important;
  width: 100% !important;
  flex: 1 !important;
  outline: none !important;
  margin: 0 !important;
  font-size: 0.95rem !important;
  height: 100% !important;
  box-shadow: none !important;
}

#goal-exchange-rate-group input {
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

#goal-exchange-rate-group input:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-shadow);
}


/* ==========================================================================
   11. Print Stylesheet
   ========================================================================== */
@media print {
  /* Hide all web interface components */
  body {
    background: #ffffff !important;
    color: #000000 !important;
    margin: 0 !important;
    padding: 0 !important;
    font-size: 11pt !important;
  }
  
  .print-hide,
  header,
  footer,
  .hero-section,
  .calculator-grid,
  .ad-container,
  .seo-faq-section,
  #theme-toggle,
  .modal-header,
  .invoice-form {
    display: none !important;
  }

  /* Show only the invoice modal backdrop as transparent */
  #invoice-modal {
    position: absolute !important;
    inset: 0 !important;
    display: block !important;
    background: transparent !important;
    opacity: 1 !important;
    pointer-events: none !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  /* Remove modal card boundaries and shadows */
  .modal-card {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    margin: 0 !important;
    padding: 0 !important;
    inline-size: 100% !important;
    max-inline-size: 100% !important;
    max-block-size: none !important;
    display: block !important;
    overflow: visible !important;
  }

  .modal-grid {
    display: block !important;
    overflow: visible !important;
  }

  .invoice-preview-container {
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    display: block !important;
    overflow: visible !important;
  }

  /* Format A4 invoice sheet for printing */
  .invoice-sheet {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
    inline-size: 100% !important;
    max-inline-size: 100% !important;
    min-block-size: 0 !important;
    background: #ffffff !important;
    color: #000000 !important;
    page-break-after: avoid;
  }
  
  .invoice-sheet-client {
    border-inline-start-color: #000000 !important;
    background-color: #f8fafc !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .invoice-table th {
    background-color: #f1f5f9 !important;
    border-block-end: 2px solid #000000 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}