/* ============================================
   TOOLPIXA — Tool Page Styles
   ============================================ */

/* ============================================
   TOOL HERO / HEADER
   ============================================ */
.tool-hero {
  padding: var(--space-6) 0 var(--space-2);
}

.tool-hero h1 {
  font-size: var(--font-3xl);
  margin-bottom: var(--space-2);
}

.tool-hero .tool-description {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  margin: 0;
}

@media (max-width: 768px) {
  .tool-hero h1 {
    font-size: var(--font-2xl);
  }
  .tool-hero .tool-description {
    font-size: var(--font-base);
  }
}

/* ============================================
   CALCULATOR CONTAINER
   ============================================ */
.calculator {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.02);
  transition: all var(--transition-slow);
  contain: layout style;
  will-change: transform;
}

[data-theme="dark"] .calculator {
  background: rgba(11, 15, 25, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.calculator-inputs {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.calculator-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (max-width: 768px) {
  .calculator {
    padding: var(--space-5);
  }
  .calculator-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ============================================
   INPUT WITH SLIDER
   ============================================ */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-group .input-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.input-group .input-header label {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.input-group .input-value {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.input-group .input-value input {
  width: 145px;
  height: 44px;
  padding: 0 var(--space-4);
  background: var(--bg-input);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-base);
  font-weight: 600;
  text-align: right;
  transition: all var(--transition-fast);
}

.input-group .input-value input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  background: var(--bg-secondary);
}

.input-group .input-value .unit {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--text-tertiary);
  min-width: 20px;
}

.input-group .range-slider {
  margin-top: var(--space-1);
}

/* ============================================
   RESULT CARDS
   ============================================ */
.result-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s ease;
  will-change: transform;
}

.result-card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow: 0 12px 28px var(--shadow-color);
}

.result-card.primary {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: var(--white);
  border: none;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.25);
}

.result-card.primary:hover {
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.4);
}

.result-card.primary .result-label {
  color: rgba(255, 255, 255, 0.85);
}

.result-card.primary .result-value {
  color: var(--white);
}

.result-card.accent {
  background: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
  color: var(--white);
  border: none;
  box-shadow: 0 8px 24px rgba(225, 29, 72, 0.25);
}

.result-card.accent:hover {
  box-shadow: 0 12px 30px rgba(225, 29, 72, 0.4);
}

.result-card.accent .result-label {
  color: rgba(255, 255, 255, 0.85);
}

.result-card.accent .result-value {
  color: var(--white);
}

.result-label {
  font-size: var(--font-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-2);
}

.result-value {
  font-size: var(--font-2xl);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.results-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

@media (max-width: 480px) {
  .results-row {
    grid-template-columns: 1fr;
  }
  .result-value {
    font-size: var(--font-xl);
  }
}

/* ============================================
   CHART CONTAINER
   ============================================ */
.chart-container {
  position: relative;
  width: 100%;
  max-width: 220px;
  margin: var(--space-4) auto;
  aspect-ratio: 1;
}

.chart-container::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 52%;
  height: 52%;
  transform: translate(-50%, -50%);
  background: var(--bg-secondary);
  border-radius: 50%;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), 0 4px 10px rgba(99, 102, 241, 0.02);
  z-index: 1;
  border: 1px solid var(--border-color);
  pointer-events: none;
  transition: background var(--transition-base), border-color var(--transition-base);
}

[data-theme="dark"] .chart-container::before {
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.35);
  background: var(--bg-card);
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
  position: relative;
  z-index: 2;
}

.chart-center-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 3;
}

.chart-center-text .chart-center-value {
  font-size: var(--font-lg);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.chart-center-text .chart-center-label {
  font-size: var(--font-xs);
  color: var(--text-tertiary);
}

.chart-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================
   ACTION BUTTONS (Copy / Share)
   ============================================ */
.result-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  justify-content: center;
}

.result-actions .btn {
  min-height: 42px;
  font-size: var(--font-sm);
}

/* ============================================
   HOW TO USE SECTION
   ============================================ */
.how-to-use {
  padding: var(--space-12) 0;
}

.how-to-use h2 {
  text-align: center;
  margin-bottom: var(--space-10);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.step-card {
  text-align: center;
  padding: var(--space-6);
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-50);
  color: var(--primary);
  font-weight: 800;
  font-size: var(--font-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

[data-theme="dark"] .step-number {
  background: rgba(26, 86, 219, 0.15);
}

.step-card h3 {
  font-size: var(--font-base);
  margin-bottom: var(--space-2);
}

.step-card p {
  font-size: var(--font-sm);
  color: var(--text-tertiary);
  margin: 0;
}

@media (max-width: 768px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .step-card {
    display: flex;
    text-align: left;
    gap: var(--space-4);
    padding: var(--space-4);
  }
  .step-number {
    margin: 0;
    flex-shrink: 0;
  }
}

/* ============================================
   FAQ SECTION
   ============================================ */
.faq-section {
  padding: var(--space-12) 0;
}

.faq-section h2 {
  text-align: center;
  margin-bottom: var(--space-8);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) var(--space-6);
  text-align: left;
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  min-height: 56px;
  gap: var(--space-4);
  transition: color var(--transition-fast);
}

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

.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  min-width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-tertiary);
  transition: all var(--transition-base);
  font-size: var(--font-lg);
  color: var(--text-tertiary);
  line-height: 1;
}

.faq-item.active .faq-question .faq-icon {
  background: var(--primary);
  color: var(--white);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.22, 1, 0.36, 1), padding 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-answer-inner {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* ============================================
   RELATED TOOLS
   ============================================ */
.related-tools {
  padding: var(--space-12) 0;
}

.related-tools h2 {
  text-align: center;
  margin-bottom: var(--space-8);
}

.related-tools .tools-grid {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .related-tools .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .related-tools .tools-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   EXTRA TOOL RESULT STYLES
   ============================================ */

/* Age calculator breakdown */
.age-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.age-stat {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}

.age-stat .stat-value {
  font-size: var(--font-2xl);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.age-stat .stat-label {
  font-size: var(--font-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

@media (max-width: 480px) {
  .age-breakdown {
    grid-template-columns: repeat(3, 1fr);
  }
  .age-stat .stat-value {
    font-size: var(--font-lg);
  }
}

/* CGPA Grade display */
.grade-display {
  background: linear-gradient(135deg, #4f46e5 0%, #f43f5e 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  color: var(--white);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.2);
}

.grade-display .grade-letter {
  font-size: var(--font-5xl);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.grade-display .grade-text {
  font-size: var(--font-sm);
  opacity: 0.85;
}

/* GST Breakdown table */
.gst-breakdown {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-4);
  display: block;
  overflow-x: auto;
}

.gst-breakdown th,
.gst-breakdown td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: var(--font-sm);
}

.gst-breakdown th {
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.gst-breakdown td {
  color: var(--text-secondary);
}

.gst-breakdown tr:last-child td {
  border-bottom: none;
  font-weight: 700;
  color: var(--text-primary);
}

/* Next birthday countdown */
.birthday-countdown {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-4);
}

.countdown-item {
  background: var(--primary-50);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  text-align: center;
  min-width: 60px;
}

[data-theme="dark"] .countdown-item {
  background: rgba(26, 86, 219, 0.15);
}

.countdown-item .countdown-value {
  font-size: var(--font-xl);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.countdown-item .countdown-label {
  font-size: var(--font-xs);
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* ============================================
   SITEMAP PAGE
   ============================================ */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-8);
}

.sitemap-section h3 {
  font-size: var(--font-lg);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.sitemap-section ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sitemap-section a {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sitemap-section a:hover {
  color: var(--primary);
}

@media (max-width: 768px) {
  .sitemap-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ============================================
   CONTACT FORM
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  max-width: 900px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-50);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

[data-theme="dark"] .contact-info-icon {
  background: rgba(26, 86, 219, 0.15);
}

.contact-info-item h3 {
  font-size: var(--font-base);
  margin-bottom: var(--space-1);
}

.contact-info-item p {
  font-size: var(--font-sm);
  color: var(--text-tertiary);
  margin: 0;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.about-feature {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.about-feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--primary-50);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  font-size: 1.5rem;
}

[data-theme="dark"] .about-feature-icon {
  background: rgba(26, 86, 219, 0.15);
}

.about-feature h3 {
  font-size: var(--font-base);
  margin-bottom: var(--space-2);
}

.about-feature p {
  font-size: var(--font-sm);
  color: var(--text-tertiary);
  margin: 0;
}

@media (max-width: 768px) {
  .about-features {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* ============================================
   AMORTIZATION TABLE
   ============================================ */
.amortization-table-wrapper {
  margin-top: var(--space-8);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  animation: var(--animation-fade-in) 0.5s ease;
}

.amort-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.amort-title {
  font-size: var(--font-lg);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.amort-toggles {
  display: flex;
  gap: var(--space-2);
}

.amort-toggle-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-sm);
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.amort-toggle-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.amort-toggle-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

.amort-scroll-container {
  max-height: 450px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.amort-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--font-sm);
}

.amort-table th, .amort-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.amort-table th {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 700;
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.amort-table tr:hover {
  background: var(--border-light);
}

[data-theme="dark"] .amort-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* ============================================
   RANGE SLIDER PERFORMANCE
   ============================================ */
.range-slider {
  will-change: --value-percent;
  touch-action: none;
}

/* Smooth animated gradient border on calculator focus-within */
@keyframes borderGlow {
  0%, 100% { border-color: rgba(99, 102, 241, 0.2); }
  50% { border-color: rgba(99, 102, 241, 0.45); }
}

.calculator:focus-within {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.06), 0 0 0 1px rgba(99, 102, 241, 0.1);
  animation: borderGlow 3s ease-in-out infinite;
}

[data-theme="dark"] .calculator:focus-within {
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(129, 140, 248, 0.15);
}

/* Chart container performance */
.chart-container {
  contain: layout style;
  will-change: contents;
}

/* Amortization table performance */
.amort-scroll-container {
  contain: strict;
  will-change: scroll-position;
}