/* ==============================================
   Kagami LP & Privacy - Site Styles
   ============================================== */

/* Reset & Base
   ============================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* Navigation
   ============================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color-light);
  transition: background-color var(--transition-normal);
}

[data-theme="dark"] .nav {
  background-color: rgba(32, 33, 36, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav {
    background-color: rgba(32, 33, 36, 0.85);
  }
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

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

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  line-height: 1;
}

.theme-toggle:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--text-primary);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  margin: 5px 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero
   ============================================== */
.hero {
  padding: 120px 20px 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--bg-primary) 100%);
  transition: background var(--transition-normal);
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-icon {
  width: 96px;
  height: 96px;
  margin-bottom: var(--spacing-xl);
}

.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-tagline {
  font-size: var(--font-size-xl);
  color: var(--text-tertiary);
  margin-bottom: 40px;
  line-height: var(--line-height-relaxed);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 14px 32px;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

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

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

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* Section Common
   ============================================== */
.section {
  padding: var(--section-padding);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--text-primary);
}

.section-alt {
  background-color: var(--bg-secondary);
}

/* Features
   ============================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color-light);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: var(--spacing-lg);
}

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

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  line-height: var(--line-height-relaxed);
}

/* How It Works
   ============================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  counter-reset: step;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.step h3 {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.step p {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  line-height: var(--line-height-relaxed);
}

/* Step connector lines */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 24px;
  right: -20px;
  width: 40px;
  height: 2px;
  background-color: var(--border-color);
}

/* Pricing
   ============================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color-light);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow var(--transition-normal);
  position: relative;
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}

.pricing-card.recommended {
  border-color: var(--color-primary);
  border-width: 2px;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 20px;
}

.pricing-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.pricing-price {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pricing-price-sub {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing-features li {
  padding: 8px 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color-light);
  display: flex;
  justify-content: space-between;
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features .label {
  color: var(--text-muted);
}

.pricing-features .value {
  font-weight: 600;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* FAQ
   ============================================== */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border-color-light);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: color var(--transition-fast);
  font-family: var(--font-family);
}

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

.faq-icon {
  font-size: var(--font-size-lg);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
  margin-left: var(--spacing-lg);
  color: var(--text-muted);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-slow);
}

.faq-answer > * {
  overflow: hidden;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer p {
  padding-bottom: 20px;
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  line-height: var(--line-height-relaxed);
}

/* Footer
   ============================================== */
.footer {
  padding: 40px 20px;
  border-top: 1px solid var(--border-color-light);
  background-color: var(--bg-secondary);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.footer-logo img {
  width: 24px;
  height: 24px;
}

.footer-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

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

.footer-copy {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* Privacy Page
   ============================================== */
.privacy {
  padding: 120px 20px 80px;
}

.privacy-inner {
  max-width: 720px;
  margin: 0 auto;
}

.privacy h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.privacy-updated {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: 48px;
}

.privacy h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.privacy h3 {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.privacy p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.privacy ul,
.privacy ol {
  margin-bottom: var(--spacing-lg);
  padding-left: 24px;
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

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

.privacy code {
  background-color: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.privacy table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
}

.privacy th,
.privacy td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-color-light);
  font-size: var(--font-size-sm);
}

.privacy th {
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

/* Responsive
   ============================================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: 99;
    flex-direction: column;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color-light);
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .hero {
    padding: 80px 20px 60px;
  }

  .hero h1 {
    font-size: var(--font-size-2xl);
  }

  .hero-tagline {
    font-size: var(--font-size-md);
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .step:not(:last-child)::after {
    display: none;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  :root {
    --section-padding: 48px 16px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .privacy {
    padding: 80px 16px 60px;
  }
}

/* Animations
   ============================================== */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  }

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
  }
}