:root {
  --bg-page: #F8FAFC;
  --bg-hero-start: #F0FDFA;
  --bg-hero-end: #F1F5F9;
  --bg-card: #FFFFFF;
  --primary-accent: #0D9488;
  --primary-accent-light: #CCFBF1;
  --text-dark: #1E293B;
  --text-medium: #475569;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --error-bg: #FEF2F2;
  --error-text: #DC2626;
  --warning-bg: #FFFBEB;
  --warning-text: #B45309;
  --success-bg: #ECFDF5;
  --success-text: #065F46;
  --protein-color: #3B82F6;
  --carbs-color: #10B981;
  --fat-color: #F59E0B;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-page);
  color: var(--text-medium);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--text-dark);
  line-height: 1.2;
  font-weight: 600;
}

h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

h2.section-title {
  font-size: clamp(1.25rem, 4vw, 1.5rem);
  margin-bottom: 1.25rem;
}

h3.subsection-title {
  font-size: clamp(1rem, 3vw, 1.1rem);
  margin-bottom: 0.75rem;
}

/* Navigation */
.navbar {
  background-color: var(--bg-card);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem clamp(0.75rem, 3vw, 1rem);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo {
  height: 32px;
  width: auto;
}

.brand-name {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 1.1rem;
}

/* Navigation Toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 0.25rem;
  z-index: 1002;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-dark);
  transition: all 0.3s ease;
  transform-origin: center;
}

/* Navigation Slider */
.nav-slider {
  position: fixed;
  top: 0;
  right: -100%;
  width: 300px;
  height: 100vh;
  background-color: var(--bg-card);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  transition: right 0.3s ease-in-out;
  z-index: 1001;
  overflow-y: auto;
}

.nav-slider.active {
  right: 0;
}

.slider-content {
  padding: 1.5rem;
  height: 100%;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.slider-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-dark);
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1002;
}

.slider-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.slider-link {
  display: block;
  padding: 1rem;
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  border-radius: 0.5rem;
  transition: all 0.2s;
}

.slider-link:hover, .slider-link.active {
  background-color: var(--primary-accent-light);
  color: var(--primary-accent);
}

/* Overlay when slider is open */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--bg-hero-start) 0%, var(--bg-hero-end) 100%);
  padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 4vw, 2rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-text p {
  font-size: clamp(1rem, 3vw, 1.25rem);
  margin-bottom: 2rem;
  color: var(--text-medium);
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  padding: clamp(1.5rem, 4vw, 2rem);
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.main-card {
  margin-top: -2rem;
  position: relative;
  z-index: 10;
}

/* Main Grid Layout */
.main-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

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

/* Form Elements */
.form-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-weight: 500;
  color: var(--text-dark);
}

.input-group input, .input-group select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
  background-color: white;
}

.input-group input:focus, .input-group select:focus {
  outline: none;
  border-color: var(--primary-accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.input-help {
  font-size: 0.875rem;
  color: var(--text-light);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Mode Selector */
.mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: white;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
  text-align: center;
}

.mode-btn:hover {
  border-color: var(--primary-accent);
}

.mode-btn.active {
  background-color: var(--primary-accent-light);
  border-color: var(--primary-accent);
  color: var(--primary-accent);
}

.mode-options {
  display: none;
}

.mode-options.active {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Drawing Actions */
.draw-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

/* Buttons */
.calculate-button {
  background-color: var(--primary-accent);
  color: white;
  border: none;
  padding: 1rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  width: 100%;
}

.calculate-button:hover {
  background-color: #0f766e;
  transform: translateY(-2px);
}

.cta-button {
  display: inline-block;
  background-color: var(--primary-accent);
  color: white;
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  background-color: #0f766e;
  transform: translateY(-2px);
}

.action-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: white;
  color: var(--text-dark);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
  text-align: center;
}

.action-button:hover {
  border-color: var(--primary-accent);
  color: var(--primary-accent);
}

.action-button.secondary {
  background-color: var(--bg-page);
}

.print-button {
  background-color: var(--primary-accent);
  color: white;
  border: none;
}

.print-button:hover {
  background-color: #0f766e;
  color: white;
}

.save-button {
  background-color: #3B82F6;
  color: white;
  border: none;
}

.save-button:hover {
  background-color: #2563EB;
  color: white;
}

/* Checkbox */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--border-color);
  border-radius: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background-color: var(--primary-accent);
  border-color: var(--primary-accent);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: "✓";
  color: white;
  font-size: 0.75rem;
}

/* Canvas */
.canvas-container {
  margin-top: 1rem;
}

.canvas-wrapper {
  position: relative;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  background-color: white;
}

#drawing-canvas, #signature-canvas {
  width: 100%;
  height: 200px;
  display: block;
  cursor: crosshair;
  background-color: transparent;
}

.canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: rgba(248, 250, 252, 0.8);
  color: var(--text-light);
  pointer-events: none;
  z-index: 1;
}

.canvas-overlay p.small {
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* Results Section */
.results-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.results-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Results Tabs */
.results-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.results-tab {
  padding: 0.75rem 1.5rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-medium);
  transition: all 0.2s;
}

.results-tab:hover {
  color: var(--primary-accent);
}

.results-tab.active {
  color: var(--primary-accent);
  border-bottom-color: var(--primary-accent);
}

.tab-content {
  position: relative;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Action Buttons Grid */
.action-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 480px) {
  .action-buttons {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Preview Section */
.preview-section {
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  background-color: white;
}

.preview-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: var(--bg-page);
  border-radius: 0.5rem;
}

.preview-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* Email Signature */
.email-signature-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.email-signature-preview {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: white;
}

.email-signature-output {
  padding: 1rem;
  background-color: var(--bg-page);
  border-radius: 0.25rem;
  margin: 1rem 0;
  min-height: 100px;
  border: 1px solid var(--border-color);
}

.email-signature-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

@media (min-width: 768px) {
  .email-signature-actions {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Document Preview */
.document-preview-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.document-preview {
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  background-color: white;
  min-height: 300px;
}

.document-content {
  line-height: 1.8;
}

.signature-placeholder {
  margin: 2rem 0;
  padding: 2rem;
  border: 2px dashed var(--border-color);
  border-radius: 0.5rem;
  text-align: center;
  color: var(--text-light);
  background-color: var(--bg-page);
  transition: all 0.3s ease;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.signature-placeholder.has-signature {
  border: 1px solid var(--border-color);
  background-color: white;
  padding: 1rem;
}

.signature-placeholder.has-signature img {
  max-width: 100%;
  max-height: 80px;
}

/* Notices */
.privacy-notice, .disclaimer-box {
  padding: 1rem;
  border-radius: 0.5rem;
  margin-top: 1rem;
}

.privacy-notice {
  background-color: var(--success-bg);
  border-left: 4px solid var(--success-text);
}

.disclaimer-box {
  background-color: var(--warning-bg);
  border-left: 4px solid var(--warning-text);
}

.privacy-title, .disclaimer-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.privacy-text, .disclaimer-text {
  font-size: 0.875rem;
  color: var(--text-medium);
}

/* Message Boxes */
.message-box {
  padding: 1rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.message-box i {
  font-size: 1.25rem;
  margin-top: 0.125rem;
}

.message-content {
  flex: 1;
}

.error-box {
  background-color: var(--error-bg);
  color: var(--error-text);
  border-left: 4px solid var(--error-text);
}

.success-box {
  background-color: var(--success-bg);
  color: var(--success-text);
  border-left: 4px solid var(--success-text);
}

/* Animations */
.animate-on-load {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Background Styles */
.canvas-wrapper.transparent {
  background-color: transparent;
}

.canvas-wrapper.white {
  background-color: white;
}

.canvas-wrapper.lined {
  background-image: 
    linear-gradient(to bottom, 
      transparent 19px, 
      #E2E8F0 19px, 
      #E2E8F0 20px, 
      transparent 20px
    );
  background-size: 100% 20px;
  background-color: white;
}

.canvas-wrapper.dotted {
  background-image: 
    radial-gradient(circle, #E2E8F0 1px, transparent 1px);
  background-size: 20px 20px;
  background-color: white;
}

/* Drawing cursor */
#drawing-canvas {
  cursor: crosshair;
}

/* Responsive Adjustments */
@media (max-width: 767px) {
  .input-row {
    grid-template-columns: 1fr;
  }
  
  .mode-selector {
    grid-template-columns: 1fr;
  }
  
  .draw-actions {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .action-buttons {
    grid-template-columns: 1fr;
  }
  
  .preview-actions {
    flex-direction: column;
  }
  
  .results-tabs {
    flex-direction: column;
  }
  
  .email-signature-actions {
    grid-template-columns: 1fr;
  }
}

/* Footer */
.footer {
  background-color: var(--bg-card);
  padding: 2rem 1rem;
  margin-top: 4rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 1rem 0;
}

.footer-links a {
  color: var(--text-medium);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-accent);
}

.disclaimer {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
/* FAQ Section */
.content-section {
  padding: 3rem 1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .faq-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.faq-item {
  background: var(--bg-card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.faq-item h3 {
  color: var(--primary-accent);
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
}

.faq-item p {
  color: var(--text-medium);
  line-height: 1.6;
  font-size: 0.95rem;
}
/* How-To Section */
.how-to-section {
  padding: 4rem 1rem;
  background: linear-gradient(135deg, var(--bg-hero-start) 0%, var(--bg-hero-end) 100%);
}

.how-to-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .how-to-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .how-to-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.how-to-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.how-to-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.how-to-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.how-to-icon i {
  font-size: 1.5rem;
  color: var(--primary-accent);
}

.how-to-card h3 {
  color: var(--text-dark);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

.how-to-card p {
  color: var(--text-medium);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Remove preview-actions since resize button is gone */
.preview-actions {
  display: none;
}