/* ============================================
   Tone Master Website - Main Styles
   ============================================ */

/* CSS Variables - Brand Colors */
:root {
  /* Brand Colors */
  --color-brand-primary: #1A1918;
  --color-brand-secondary: #FDF4EE;
  --color-brand-accent: #81C784;
  
  /* Functional Colors */
  --color-success: #81C784;
  --color-error: #E57373;
  --color-warning: #FFF9C4;
  --color-progress: #66BB6A;
  --color-info: #6B7280;
  
  /* Backgrounds */
  --color-bg-primary: #FDF4EE;
  --color-bg-secondary: #FFFFFF;
  --color-bg-card: #FFFFFF;
  
  /* Text Colors */
  --color-text-primary: #1A1918;
  --color-text-secondary: #4B5563;
  --color-text-brand: #1A1918;
  
  /* Borders */
  --color-border: #1A1918;
  --color-light-border: #D7CCC8;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(26, 25, 24, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 25, 24, 0.1);
  --shadow-lg: 0 8px 24px rgba(26, 25, 24, 0.12);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-brand);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

/* Mobile Typography */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
}

/* ============================================
   Container & Layout
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

section {
  padding: var(--spacing-3xl) 0;
}

@media (max-width: 768px) {
  section {
    padding: var(--spacing-2xl) 0;
  }
  
  .section-header h2 {
    font-size: 2rem;
  }
  
  .section-header p {
    font-size: 1.125rem;
  }
}

/* ============================================
   Navigation Bar
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md) 0;
  z-index: 1000;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(26, 25, 24, 0.05);
}

.navbar.scrolled {
  box-shadow: 0 2px 8px rgba(26, 25, 24, 0.1);
  padding: var(--spacing-sm) 0;
}

.navbar .container {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--spacing-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-brand-primary);
  text-decoration: none;
}

.navbar-brand:hover {
  opacity: 0.8;
}

.navbar-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  display: block;
}

@media (max-width: 768px) {
  .navbar-logo {
    width: 32px;
    height: 32px;
  }
  
  .navbar-brand {
    font-size: 1.125rem;
  }
}

.navbar-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar-menu a {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: all 0.3s ease;
  text-decoration: none;
  padding: 0.5rem 0;
  position: relative;
}

.navbar-menu a:hover {
  color: var(--color-brand-primary);
}

.navbar-menu a.active {
  color: var(--color-brand-primary);
}

.navbar-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-brand-primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar-actions .btn {
  padding: 0.625rem 1.5rem;
  font-size: 0.9375rem;
}

.navbar-action-mobile {
  display: none;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-brand-primary);
  transition: all 0.3s ease;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .navbar {
    padding: var(--spacing-sm) 0;
  }
  
  .navbar .container {
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-md);
  }
  
  .navbar-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-bg-secondary);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md) 0;
    box-shadow: 0 4px 12px rgba(26, 25, 24, 0.15);
    border-top: 1px solid var(--color-light-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .navbar-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .navbar-menu li {
    width: 100%;
    text-align: center;
    padding: var(--spacing-sm) 0;
  }
  
  .navbar-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .navbar-menu a.active::after {
    left: 50%;
    right: auto;
    width: 40px;
    transform: translateX(-50%);
  }
  
  .navbar-actions {
    display: none;
  }
  
  .navbar-action-mobile {
    display: block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .navbar-action-mobile .btn {
    width: 100%;
    text-align: center;
  }
  
  .navbar-toggle {
    display: flex;
  }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-brand-primary);
  color: #FFFFFF;
  border: none;
}

.btn-primary:hover {
  background-color: #2D2C2B;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background-color: var(--color-brand-accent);
  color: var(--color-brand-primary);
}

.btn-accent:hover {
  background-color: #66BB6A;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-brand-primary);
  color: #FFFFFF;
}

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
}

.hero-text .btn-group {
  margin-top: var(--spacing-2xl);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  min-height: 80vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg-primary);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-text h1 {
  font-size: 4.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-text p:first-of-type {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  line-height: 1.3;
}

.hero-text p:not(:first-of-type) {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  max-width: 350px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 968px) {
  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-2xl);
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .hero-text p:first-of-type {
    font-size: 1.5rem;
  }
  
  .hero-text p:not(:first-of-type) {
    font-size: 1.125rem;
  }
  
  .btn-group {
    justify-content: center;
  }
  
  .hero-image img {
    max-width: 280px;
  }
}

/* ============================================
   Features Grid
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.feature-card {
  background-color: var(--color-bg-card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: none;
  border: 1px solid var(--color-light-border);
  transition: all 0.3s ease;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-brand-primary);
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-lg);
  display: block;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-brand);
}

.feature-card p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

@media (max-width: 968px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
}

@media (max-width: 576px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Section Headers
   ============================================ */

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ============================================
   Feature Detail Cards
   ============================================ */

.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

.feature-detail:nth-child(even) .feature-detail-image {
  order: -1;
}

.feature-detail-text h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.feature-detail-text p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.feature-detail-image img {
  max-width: 320px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .feature-detail {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .feature-detail:nth-child(even) .feature-detail-image {
    order: 0;
  }
  
  .feature-detail-image img {
    max-width: 280px;
  }
}

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  text-align: center;
  border: 1px solid var(--color-light-border);
}

.contact-section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.contact-info a {
  color: var(--color-brand-accent);
  font-size: 1.25rem;
  font-weight: 600;
  transition: color 0.3s ease;
}

.contact-info a:hover {
  color: var(--color-brand-primary);
}

.contact-info p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.cta-section p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
  .cta-section h2 {
    font-size: 2rem;
  }
  
  .cta-section p {
    font-size: 1.125rem;
  }
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background-color: var(--color-brand-primary);
  color: #FFFFFF;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-brand-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  display: block;
  flex-shrink: 0;
}

.footer-brand h3 {
  color: #FFFFFF;
  margin: 0;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.footer-links h4 {
  color: #FFFFFF;
  margin-bottom: var(--spacing-sm);
}

.footer-links ul {
  list-style: none;
}

.footer-links ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-links ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s ease;
}

.footer-links ul li a:hover {
  color: var(--color-brand-accent);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* ============================================
   Privacy Policy Page
   ============================================ */

.privacy-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-bg-card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.privacy-content h2 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  font-size: 1.75rem;
}

.privacy-content h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.privacy-content p,
.privacy-content ul,
.privacy-content ol {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.privacy-content ul,
.privacy-content ol {
  padding-left: var(--spacing-xl);
}

.privacy-content li {
  margin-bottom: var(--spacing-xs);
}

.privacy-content .last-updated {
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Utility Classes
   ============================================ */

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.py-1 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-3 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-4 { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }