/* Tudu landing — 섹션 레이아웃. 토큰·기본 컴포넌트는 design.css */

/* ---------- Dev bar ---------- */
.dev-bar {
  border-bottom: 1px solid var(--border);
  background: var(--bg-subtle);
  font-size: 13px;
  color: var(--text-muted);
}
.dev-bar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 40px;
  padding-block: 6px;
}
.dev-bar-inner .link {
  margin-left: auto;
  white-space: nowrap;
}
.dev-bar-text-short {
  display: none;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 720;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: var(--space-6);
  font-size: var(--text-sm);
  font-weight: 550;
  color: var(--text-muted);
}
.nav-links a {
  transition: color var(--dur-fast);
}
.nav-links a:hover {
  color: var(--text);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface-raised);
  color: var(--text);
  cursor: pointer;
}
.nav-toggle svg {
  width: 20px;
  height: 20px;
  margin: auto;
  display: block;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: clamp(56px, 9vw, 104px);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: var(--hero-aura);
}
.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(70% 60% at 50% 20%, #000 30%, transparent 75%);
  mask-image: radial-gradient(70% 60% at 50% 20%, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-title {
  margin-top: var(--space-6);
  font-size: var(--text-display);
  font-weight: 760;
  line-height: 1.1;
  letter-spacing: -0.035em;
}
.hero-lead {
  max-width: 720px;
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  color: var(--text-muted);
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
}
.hero-note {
  margin-top: var(--space-4);
  font-size: 13px;
  color: var(--text-subtle);
}

/* QuickAdd 데모 */
.qa {
  width: min(620px, 100%);
  margin-top: var(--space-12);
  padding: var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  background: var(--surface-raised);
  box-shadow: var(--glow), var(--shadow-lg);
  text-align: left;
}
.qa-input {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 52px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
  font-size: 17px;
  font-weight: 520;
}
.qa-plus {
  width: 20px;
  height: 20px;
  flex: none;
  color: var(--primary);
}
.qa-text {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: clip;
}
.qa-caret {
  width: 2px;
  height: 22px;
  margin-left: -10px;
  background: var(--primary);
  animation: caret 1s steps(1) infinite;
}
@keyframes caret {
  50% {
    opacity: 0;
  }
}
.qa-kbd {
  display: inline-flex;
  gap: 4px;
  margin-left: auto;
  flex: none;
}
.qa-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-height: 46px;
  padding: var(--space-3) var(--space-1) var(--space-1);
}
.qa-chips .chip {
  animation: chip-in 380ms var(--ease-out) both;
}
@keyframes chip-in {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.96);
  }
}

.hero-shot {
  position: relative;
  width: 100%;
  margin-top: clamp(48px, 7vw, 80px);
  -webkit-mask-image: linear-gradient(#000 70%, transparent);
  mask-image: linear-gradient(#000 70%, transparent);
}
.hero-shot::before {
  content: "";
  position: absolute;
  inset: 8% 10% auto;
  height: 60%;
  background: var(--gradient-brand);
  filter: blur(90px);
  opacity: 0.28;
  z-index: -1;
}
.hero-shot .frame {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

/* ---------- Platform strip ---------- */
.strip {
  border-block: 1px solid var(--border);
  background: var(--bg-subtle);
}
.strip-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  min-height: 72px;
  padding-block: var(--space-4);
}
.strip-label {
  font-size: var(--text-xs);
  font-weight: 650;
  color: var(--text-subtle);
}
.strip ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-10);
  margin: 0;
  padding: 0;
  list-style: none;
  font-weight: 600;
}
.strip li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.strip li .muted {
  font-weight: 450;
  font-size: var(--text-sm);
}
.strip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-subtle);
}
.strip-dot.is-live {
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.18);
}

/* ---------- Section ---------- */
.section {
  padding-block: var(--section-gap);
}
.section-subtle {
  background: var(--bg-subtle);
  border-block: 1px solid var(--border);
}
.section-head {
  max-width: 720px;
  margin-bottom: clamp(40px, 6vw, 64px);
}
.section-title {
  margin-top: var(--space-3);
  font-size: var(--text-h2);
  font-weight: 720;
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.section-lead {
  margin-top: var(--space-5);
  font-size: var(--text-lg);
  color: var(--text-muted);
}

/* ---------- Bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}
/* 넓은 카드 1 + 3열 1줄 + 2열 1줄 */
.bento-item {
  grid-column: span 2;
}
.bento-item:nth-child(n + 5) {
  grid-column: span 3;
}
.bento-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-8);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.bento-item:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.bento-item h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-h3);
  font-weight: 650;
  letter-spacing: -0.015em;
}
.bento-item p {
  color: var(--text-muted);
  font-size: 15px;
}
.bento-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr);
  align-items: center;
  gap: var(--space-10);
}
.bento-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.bento-media-qa {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--chip-bg);
  color: var(--chip-text);
  border: 1px solid rgba(129, 140, 248, 0.25);
}
.feature-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
}
.badge-sm {
  height: 22px;
  padding: 0 var(--space-2);
  font-size: 11.5px;
}

/* ---------- Showcase ---------- */
.showcase {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.3fr);
  align-items: center;
  gap: clamp(32px, 6vw, 80px);
}
.showcase + .showcase {
  margin-top: clamp(64px, 9vw, 112px);
}
.showcase-reverse {
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.85fr);
}
.showcase-reverse .showcase-copy {
  order: 2;
}
.showcase-copy h3 {
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.showcase-copy p {
  margin-top: var(--space-4);
  color: var(--text-muted);
}
.checks {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}
.checks li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
}
.checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--chip-bg)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.5l2.5 2.5L14 7.5' fill='none' stroke='%236366f1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")
    center / 20px no-repeat;
}

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.step {
  padding: var(--space-8);
}
.step-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.step h3 {
  margin-top: var(--space-4);
  font-size: var(--text-h3);
  font-weight: 650;
}
.step p {
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: 15px;
}

/* ---------- Roadmap ---------- */
.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.roadmap-col {
  padding: var(--space-8);
}
.roadmap-badge.is-live {
  border-color: rgba(16, 185, 129, 0.35);
  color: var(--success);
}
.roadmap-col ul {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}
.roadmap-col li {
  padding-bottom: var(--space-3);
  border-bottom: 1px dashed var(--border);
  font-size: 15px;
}
.roadmap-col li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

/* ---------- FAQ ---------- */
.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}
.faq {
  border-top: 1px solid var(--border);
}
.faq details {
  border-bottom: 1px solid var(--border);
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  font-weight: 620;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  flex: none;
  font-size: 22px;
  font-weight: 400;
  color: var(--text-subtle);
  transition: transform var(--dur) var(--ease-out);
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq details p {
  padding-bottom: var(--space-5);
  color: var(--text-muted);
}

/* ---------- CTA ---------- */
.cta {
  padding-bottom: var(--section-gap);
}
.cta-card {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-strong);
  background: var(--surface-raised);
  text-align: center;
}
.cta-glow {
  position: absolute;
  inset: -40% 10% auto;
  height: 90%;
  background: var(--gradient-brand);
  filter: blur(110px);
  opacity: 0.3;
  pointer-events: none;
}
.cta-card h2 {
  position: relative;
  font-size: var(--text-h2);
  font-weight: 740;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.cta-card p {
  position: relative;
  margin-top: var(--space-4);
  color: var(--text-muted);
  font-size: var(--text-lg);
}
.cta-card .hero-cta {
  position: relative;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-10);
  font-size: var(--text-sm);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-8);
}
.footer-links {
  display: flex;
  gap: var(--space-6);
  margin-left: auto;
  color: var(--text-muted);
}
.footer-links a:hover {
  color: var(--text);
}

/* ---------- Reveal (JS opt-in: JS 없으면 항상 표시) ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-enter) var(--ease-out), transform var(--dur-enter) var(--ease-out);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
  }
  .qa-caret {
    animation: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .bento {
    grid-template-columns: 1fr 1fr;
  }
  .bento-item,
  .bento-item:nth-child(n + 5) {
    grid-column: span 1;
  }
  .bento-wide {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
  }
  .showcase,
  .showcase-reverse,
  .faq-wrap {
    grid-template-columns: 1fr;
  }
  .showcase-reverse .showcase-copy {
    order: 0;
  }
  .steps,
  .roadmap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: var(--space-2) var(--gutter) var(--space-4);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
  }
  .nav-links.is-open {
    display: flex;
  }
  .nav-links a {
    padding: var(--space-3) 0;
    font-size: var(--text-base);
  }
  .nav-toggle {
    display: block;
  }
  .nav-actions .btn {
    height: 36px;
    padding: 0 var(--space-3);
  }
  .dev-bar-text {
    display: none;
  }
  .dev-bar-text-short {
    display: inline;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .br-desktop {
    display: none;
  }
  .bento {
    grid-template-columns: 1fr;
  }
  .bento-item,
  .bento-item:nth-child(n + 5),
  .bento-wide {
    grid-column: 1 / -1;
  }
  .bento-item {
    padding: var(--space-6);
  }
  .qa-input {
    font-size: 15px;
  }
  .qa-kbd {
    display: none;
  }
  .strip-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  .footer-links {
    margin-left: 0;
  }
}