/* ============================================
   CutJournal AI - Styles
   ============================================ */

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

:root {
  --color-primary: #4B9CD3;
  --color-primary-dark: #3a7fb5;
  --color-primary-light: #e8f4fd;
  --color-text: #1a1a2e;
  --color-text-light: #555;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fb;
  --color-border: #e2e8f0;
  --color-success: #48bb78;
  --color-danger: #e53e3e;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1120px;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
  cursor: pointer;
  border: none;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

/* --- Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-light);
  font-size: 0.95rem;
  font-weight: 500;
}

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

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* --- Hero --- */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 60%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
}

/* Hero device image */
.hero-device-img {
  max-width: 320px;
  margin: 0 auto;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

/* --- Section Shared Styles --- */
section {
  padding: 80px 0;
}

section h2 {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* --- Difference Section --- */
.difference {
  background: var(--color-bg-alt);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.comparison-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.comparison-card.highlight {
  border: 2px solid var(--color-primary);
}

.comparison-card h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.comparison-list {
  list-style: none;
}

.comparison-list li {
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.comparison-list li::before {
  position: absolute;
  left: 0;
  font-size: 1rem;
}

.comparison-list.negative li::before {
  content: "✕";
  color: var(--color-danger);
}

.comparison-list.positive li::before {
  content: "✓";
  color: var(--color-success);
}

/* --- Features --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

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

/* --- Screenshots --- */
.screenshots {
  background: var(--color-bg-alt);
}

.screenshots-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.screenshot-placeholder {
  background: var(--color-text);
  border-radius: 20px;
  padding: 8px;
  aspect-ratio: 9 / 19.5;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
}

/* --- Testimonials --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.testimonial-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 32px;
  border: none;
  margin: 0;
}

.testimonial-card p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-card cite {
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-style: normal;
  font-weight: 600;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  color: #fff;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.15rem;
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-section .btn-primary:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary-dark);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-logo {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 0.9rem;
}

.footer-links ul {
  list-style: none;
  display: flex;
  gap: 24px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.footer-credit {
  color: rgba(255, 255, 255, 0.5);
}

/* --- Single Page Content (privacy, terms, support) --- */
.page-content {
  padding: 48px 0 80px;
}

.page-content h1 {
  font-size: 2.2rem;
  margin-bottom: 24px;
}

.page-content h2 {
  font-size: 1.5rem;
  text-align: left;
  margin: 36px 0 12px;
}

.page-content h3 {
  font-size: 1.2rem;
  margin: 24px 0 8px;
}

.page-content p {
  margin-bottom: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

.page-content ul,
.page-content ol {
  margin: 0 0 16px 24px;
  color: var(--color-text-light);
}

.page-content li {
  margin-bottom: 8px;
}

.page-content strong {
  color: var(--color-text);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-cta {
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .screenshots-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links ul {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
}

@media (max-width: 600px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

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

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  section {
    padding: 56px 0;
  }

  section h2 {
    font-size: 1.75rem;
  }

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

  .screenshots-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .device-mockup {
    max-width: 220px;
  }
}