/* Mang1up Platform Landing — Design tokens + components */

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-card: #ffffff;
  --fg: #0a0a0a;
  --fg-muted: #525252;
  --fg-subtle: #737373;
  --border: #e5e5e5;
  --border-strong: #d4d4d4;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.1);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 40px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: 'Pretendard Variable', 'Inter', 'Noto Sans JP', system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-subtle: #111111;
  --bg-card: #171717;
  --fg: #fafafa;
  --fg-muted: #a3a3a3;
  --fg-subtle: #737373;
  --border: #262626;
  --border-strong: #404040;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: rgba(129, 140, 248, 0.15);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 40px rgba(0,0,0,0.6);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }
ul { list-style: none; padding: 0; margin: 0; }

.ldg-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.ldg-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.ldg-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.ldg-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
}
.ldg-logo-mark {
  color: var(--accent);
  display: block;
  flex-shrink: 0;
}
.ldg-nav-links {
  display: flex;
  gap: 24px;
  flex: 1;
}
.ldg-nav-links a {
  color: var(--fg-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}
.ldg-nav-links a:hover { color: var(--fg); }
.ldg-nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}
.ldg-icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.ldg-icon-btn:hover { background: var(--bg-subtle); border-color: var(--border-strong); }
.ldg-icon-sun { display: none; }
[data-theme="dark"] .ldg-icon-sun { display: block; }
[data-theme="dark"] .ldg-icon-moon { display: none; }
.ldg-lang-menu {
  position: absolute;
  top: 110%;
  right: 120px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  min-width: 140px;
}
.ldg-lang-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  background: transparent;
  border: none;
  color: var(--fg);
  font-size: 14px;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}
.ldg-lang-menu button:hover { background: var(--bg-subtle); }

/* Buttons */
.ldg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  min-height: 44px;
  transition: all 0.15s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.ldg-btn-primary {
  background: var(--accent);
  color: white;
}
.ldg-btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.ldg-btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.ldg-btn-ghost:hover {
  background: var(--bg-subtle);
  border-color: var(--border-strong);
}
.ldg-btn-lg { padding: 14px 28px; font-size: 16px; min-height: 52px; }

.ldg-hamburger {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.ldg-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  margin: 0 auto;
  transition: 0.2s;
}

/* Hero */
.ldg-hero {
  padding: 80px 0 60px;
}
.ldg-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ldg-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.ldg-hero-text h1 {
  font-size: clamp(36px, 5vw, 64px);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  max-width: 13ch;
  word-break: keep-all;
}
.ldg-lead {
  font-size: clamp(16px, 1.5vw, 20px);
  color: var(--fg-muted);
  margin-bottom: 32px;
  max-width: 520px;
}
.ldg-hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.ldg-hero-note {
  font-size: 13px;
  color: var(--fg-subtle);
}

/* Hero mock */
.ldg-hero-visual { position: relative; }
.ldg-mock-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.ldg-mock-bar {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}
.ldg-mock-bar > span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}
.ldg-mock-url {
  margin-left: 12px;
  padding: 3px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 11px;
  color: var(--fg-muted);
}
.ldg-mock-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
}
.ldg-mock-app {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 180px;
}
.ldg-mock-app-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--fg);
}
.ldg-mock-app-icon { font-size: 16px; }
.ldg-mock-chat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ldg-mock-bubble {
  height: 14px;
  border-radius: 999px;
  background: var(--border-strong);
  opacity: 0.6;
}
.ldg-mock-bubble-in { width: 70%; align-self: flex-start; }
.ldg-mock-bubble-out {
  width: 55%;
  align-self: flex-end;
  background: var(--accent);
  opacity: 0.9;
}
.ldg-mock-bubble-sm { width: 45%; }
.ldg-mock-cal {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ldg-mock-cal-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.ldg-mock-cal-row span {
  height: 20px;
  border-radius: 4px;
  background: var(--border-strong);
  opacity: 0.4;
}
.ldg-mock-cal-row span.on {
  background: var(--accent);
  opacity: 0.9;
}
.ldg-mock-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  font-size: 11px;
  color: var(--fg-muted);
}
.ldg-mock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
}
@media (max-width: 720px) {
  .ldg-mock-body { grid-template-columns: 1fr; }
  .ldg-mock-app { min-height: 140px; }
}

/* Problem section */
.ldg-problem {
  padding: 80px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.ldg-problem h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  text-align: center;
  margin-bottom: 48px;
}
.ldg-problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ldg-problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.ldg-problem-icon {
  font-size: 32px;
  margin-bottom: 16px;
}
.ldg-problem-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}
.ldg-problem-card p {
  color: var(--fg-muted);
  font-size: 15px;
}

/* Section head */
.ldg-section-head {
  text-align: center;
  margin-bottom: 56px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.ldg-eyebrow {
  display: inline-block;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.ldg-section-head h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  margin-bottom: 12px;
}
.ldg-section-head p {
  color: var(--fg-muted);
  font-size: 17px;
}

/* Services / Why / About */
.ldg-services { padding: 100px 0; }
.ldg-why { padding: 100px 0; background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.ldg-about { padding: 100px 0; }
.ldg-about-text { max-width: 720px; margin: 0 auto; text-align: center; }
.ldg-about-text p { color: var(--fg-muted); font-size: 17px; line-height: 1.7; margin-bottom: 12px; }

.ldg-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ldg-service-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s var(--ease);
}
.ldg-service-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.ldg-service-soon { opacity: 0.7; cursor: default; }
.ldg-service-soon:hover { transform: none; border-color: var(--border); box-shadow: none; }
.ldg-service-icon { font-size: 36px; margin-bottom: 16px; }
.ldg-service-card h3 { font-size: 20px; margin-bottom: 8px; }
.ldg-service-card p { color: var(--fg-muted); font-size: 15px; flex: 1; margin-bottom: 20px; }
.ldg-service-link { color: var(--accent); font-size: 14px; font-weight: 600; }
.ldg-service-muted { color: var(--fg-muted); }

/* Features - Bento (legacy, kept for back-compat) */
.ldg-features { padding: 100px 0; }
.ldg-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ldg-bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.2s var(--ease);
}
.ldg-bento-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.ldg-bento-lg { grid-column: span 2; }
.ldg-bento-icon {
  font-size: 28px;
  margin-bottom: 16px;
}
.ldg-bento-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.ldg-bento-card p {
  color: var(--fg-muted);
  font-size: 15px;
}

/* Howto */
.ldg-howto {
  padding: 100px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.ldg-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.ldg-step {
  text-align: center;
  padding: 24px;
}
.ldg-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 20px;
  margin-bottom: 20px;
}
.ldg-step h3 {
  font-size: 22px;
  margin-bottom: 12px;
}
.ldg-step p {
  color: var(--fg-muted);
}

/* Pricing */
.ldg-pricing { padding: 100px 0; }
.ldg-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}
.ldg-price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.ldg-price-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.ldg-price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: white;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.ldg-price-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
}
.ldg-price {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}
.ldg-price-currency { font-size: 20px; vertical-align: top; margin-right: 2px; }
.ldg-price-period {
  font-size: 16px;
  color: var(--fg-muted);
  font-weight: 500;
}
.ldg-price-card ul {
  margin-bottom: 32px;
  flex: 1;
}
.ldg-price-card li {
  padding: 8px 0;
  color: var(--fg-muted);
  font-size: 15px;
  border-bottom: 1px solid var(--border);
}
.ldg-price-card li:last-child { border-bottom: none; }
.ldg-price-card .ldg-btn { width: 100%; }

/* FAQ */
.ldg-faq {
  padding: 100px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.ldg-faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ldg-faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.ldg-faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.ldg-faq-item summary::-webkit-details-marker { display: none; }
.ldg-faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 22px;
  color: var(--fg-muted);
  transition: transform 0.2s;
}
.ldg-faq-item[open] summary::after { content: '−'; }
.ldg-faq-item p {
  margin-top: 16px;
  color: var(--fg-muted);
  font-size: 15px;
}

/* Final CTA */
.ldg-cta-final {
  padding: 100px 0;
  text-align: center;
}
.ldg-cta-final h2 {
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 16px;
}
.ldg-cta-final p {
  font-size: 18px;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

/* Footer */
.ldg-footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}
.ldg-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.ldg-footer-brand p {
  color: var(--fg-muted);
  font-size: 14px;
  margin-top: 12px;
}
.ldg-footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}
.ldg-footer-col a {
  display: block;
  color: var(--fg-muted);
  font-size: 14px;
  padding: 4px 0;
}
.ldg-footer-col a:hover { color: var(--fg); }
.ldg-footer-biz {
  padding-top: 32px;
  border-top: 1px solid var(--border);
  color: var(--fg-subtle);
  font-size: 13px;
}
.ldg-footer-biz p { margin-bottom: 8px; }
.ldg-copyright { color: var(--fg-subtle); }

/* Responsive */
@media (max-width: 768px) {
  .ldg-nav-links, .ldg-nav-actions .ldg-btn, .ldg-nav-actions .ldg-icon-btn:not(#ldg-theme-btn):not(#ldg-lang-btn) {
    display: none;
  }
  .ldg-hamburger { display: flex; }
  .ldg-nav-inner { gap: 12px; }
  .ldg-nav-links.ldg-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 16px;
  }
  .ldg-nav-links.ldg-open a {
    font-size: 16px;
    padding: 8px 0;
  }

  .ldg-hero { padding: 40px 0; }
  .ldg-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .ldg-hero-cta { flex-direction: column; align-items: stretch; }
  .ldg-hero-cta .ldg-btn { width: 100%; }

  .ldg-problem-grid, .ldg-bento, .ldg-service-grid, .ldg-steps, .ldg-pricing-grid {
    grid-template-columns: 1fr;
  }
  .ldg-bento-lg { grid-column: span 1; }
  .ldg-problem, .ldg-features, .ldg-howto, .ldg-pricing, .ldg-faq, .ldg-cta-final {
    padding: 60px 0;
  }

  .ldg-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .ldg-footer-brand { grid-column: span 2; }
}

@media (max-width: 480px) {
  .ldg-container { padding: 0 16px; }
  .ldg-nav-inner { padding: 12px 16px; }
  .ldg-footer-grid { grid-template-columns: 1fr; }
  .ldg-footer-brand { grid-column: span 1; }
}