:root{
  --black: #0a0a0b;
  --black-soft: #151517;
  --panel: #1b1b1e;
  --line: rgba(243,237,226,0.10);
  --line-strong: rgba(243,237,226,0.22);
  --cream: #f3ede2;
  --cream-dim: rgba(243,237,226,0.62);
  --gold: #c9a44c;
  --gold-bright: #e2c274;
  --radius: 14px;
  --font-head: 'Oswald', 'Noto Sans KR', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
}

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

html,body{
  height:100%;
  background: var(--black);
  color: var(--cream);
  font-family: var(--font-body);
  overflow: hidden;
}

a{ color: inherit; text-decoration:none; }
button{ font-family: inherit; cursor:pointer; }

.app-shell{
  height:100vh;
  height:100dvh;
  display:flex;
  flex-direction: column;
  position: relative;
}

/* ===== Top bar ===== */
.topbar{
  flex: 0 0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10,10,11,1) 0%, rgba(10,10,11,0.98) 100%);
  z-index: 20;
}

.brand{
  display:flex; align-items:baseline; gap:8px;
  background:none; border:none; padding:0;
}
.brand:hover .brand-mark{ color: var(--gold-bright); }
.brand-mark{
  font-family: var(--font-head);
  font-weight:700;
  font-size: 20px;
  letter-spacing: 1.5px;
  color: var(--cream);
  transition: color .15s ease;
}
.brand-sub{
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--gold);
}

.topbar-actions{ display:flex; align-items:center; gap:14px; }

.btn-store{
  border:1px solid var(--gold);
  color: var(--gold-bright);
  font-size: 13px;
  font-weight:500;
  padding: 9px 16px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn-store:hover{ background: var(--gold); color: var(--black); }

.btn-menu{
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: transparent;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:4px;
}
.btn-menu span{ width:16px; height:1.5px; background: var(--cream); display:block; }
.btn-menu:hover{ border-color: var(--gold); }

/* ===== sr-only (SEO/스크린리더용, 시각적으로만 숨김) ===== */
.sr-only{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip: rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* ===== Stage ===== */
.stage{
  flex: 1 1 auto;
  position: relative;
  overflow: hidden;
}

/* Welcome view */
.welcome-view{
  position:absolute; inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding: 0 24px;
  opacity:1;
  transition: opacity .3s ease;
}
.welcome-inner{ max-width: 720px; }
.eyebrow{
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.welcome-view h1{
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.45;
  color: var(--cream);
  margin-bottom: 22px;
}
.welcome-desc{
  color: var(--cream-dim);
  font-size: 15px;
  line-height: 1.8;
}

/* Conversation view */
.conversation-view{
  position:absolute; inset:0;
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  opacity:0;
  pointer-events:none;
  transform: translateY(12px);
  transition: opacity .35s ease, transform .35s ease;
}

body[data-state="conversation"] .welcome-view,
body[data-state="menu"] .welcome-view{
  opacity:0; pointer-events:none;
}
body[data-state="conversation"] .conversation-view{
  opacity:1; pointer-events:auto; transform: translateY(0);
}

.thread{
  overflow-y: auto;
  padding: 28px 32px 40px;
  border-right: 1px solid var(--line);
  display:flex; flex-direction:column; gap: 22px;
}

.msg{ max-width: 640px; }
.msg-user{
  align-self:flex-end;
  margin-left:auto;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius) var(--radius) 4px var(--radius);
  padding: 12px 18px;
  font-size: 14.5px;
  color: var(--cream);
}
.msg-ai{
  display:flex;
  gap: 12px;
}
.msg-ai .avatar{
  flex: 0 0 auto;
  width: 30px; height:30px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
  font-family: var(--font-head);
  font-size:13px; font-weight:700; color: var(--gold-bright);
}
.msg-ai .avatar img{
  width:100%; height:100%;
  object-fit: contain;
  padding: 4px;
}
.msg-ai .bubble{
  background: var(--black-soft);
  border: 1px solid var(--line);
  border-radius: 4px var(--radius) var(--radius) var(--radius);
  padding: 14px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cream);
}
.msg-ai .bubble b{ color: var(--gold-bright); font-weight:600; }
.msg-ai .bubble.typing{ color: var(--cream-dim); font-style: italic; }

.cards-panel{
  overflow-y:auto;
  padding: 28px 26px 40px;
  background: var(--black-soft);
}
.cards-panel-label{
  font-size: 12px;
  letter-spacing:1.5px;
  text-transform:uppercase;
  color: var(--cream-dim);
  margin-bottom: 16px;
}
.cards-list{ display:flex; flex-direction:column; gap: 14px; }

.card{
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 18px;
  background: var(--panel);
  animation: cardIn .35s ease both;
}
.card-icon{ font-size: 18px; margin-bottom: 10px; display:block; color: var(--gold); }
.card-title{ font-size: 14.5px; font-weight:600; color: var(--cream); margin-bottom:6px; }
.card-desc{ font-size: 13px; color: var(--cream-dim); line-height:1.6; margin-bottom: 14px; }
.card-cta{
  display:inline-block;
  border: none;
  font-size: 12.5px;
  font-weight:600;
  color: var(--black);
  background: var(--gold);
  padding: 8px 14px;
  border-radius: 999px;
  transition: background .15s ease;
}
.card-cta:hover{ background: var(--gold-bright); }

@keyframes cardIn{
  from{ opacity:0; transform: translateY(8px); }
  to{ opacity:1; transform: translateY(0); }
}

/* ===== Composer ===== */
.composer{
  flex: 0 0 auto;
  padding: 16px 28px 22px;
  border-top: 1px solid var(--line);
  background: rgba(10,10,11,0.98);
  z-index: 20;
}

.composer-scope{
  font-size: 11.5px;
  color: var(--cream-dim);
  margin-bottom: 10px;
}

.chip-row{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.chip{
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--cream);
  font-size: 13px;
  padding: 10px 16px;
  border-radius: 999px;
  transition: border-color .15s ease, color .15s ease, transform .1s ease;
  animation: chipIn .3s ease both;
}
.chip:hover{ border-color: var(--gold); color: var(--gold-bright); transform: translateY(-1px); }

@keyframes chipIn{
  from{ opacity:0; transform: translateY(6px); }
  to{ opacity:1; transform: translateY(0); }
}

.search-row{
  display:flex;
  align-items:center;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 6px 6px 22px;
}
.search-row:focus-within{ border-color: var(--gold); }

#searchInput{
  flex:1;
  background: transparent;
  border:none;
  outline:none;
  color: var(--cream);
  font-size: 14.5px;
  font-family: inherit;
  padding: 10px 0;
}
#searchInput::placeholder{ color: var(--cream-dim); }

.btn-send{
  width: 40px; height:40px;
  border-radius:50%;
  border:none;
  background: var(--gold);
  color: var(--black);
  font-size: 16px;
  display:flex; align-items:center; justify-content:center;
  transition: background .15s ease;
}
.btn-send:hover{ background: var(--gold-bright); }

body[data-state="menu"] .composer{ display:none; }

/* ===== Menu view (좌측 메뉴 + 우측 상세) ===== */
.menu-view{
  position:absolute; inset:0;
  opacity:0;
  pointer-events:none;
  transform: translateY(12px);
  transition: opacity .35s ease, transform .35s ease;
  padding: 22px 32px 0;
  display:flex;
  flex-direction:column;
}
body[data-state="menu"] .menu-view{
  opacity:1; pointer-events:auto; transform: translateY(0);
}

.menu-back{
  align-self:flex-start;
  background:none;
  border:none;
  color: var(--cream-dim);
  font-size: 13px;
  padding: 6px 0 14px;
}
.menu-back:hover{ color: var(--gold-bright); }

.menu-body{
  flex:1;
  min-height:0;
  display:grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.menu-nav{
  border-right: 1px solid var(--line);
  padding: 18px 14px 24px 0;
  display:flex;
  flex-direction:column;
  gap: 6px;
  overflow-y:auto;
}
.menu-nav-item{
  display:flex;
  align-items:center;
  gap: 10px;
  text-align:left;
  background:none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--cream-dim);
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.menu-nav-icon{ font-size:15px; width:16px; text-align:center; }
.menu-nav-item:hover{ color: var(--cream); border-color: var(--line-strong); }
.menu-nav-item.active{
  color: var(--gold-bright);
  background: var(--panel);
  border-color: var(--gold);
}

.menu-content{
  overflow-y:auto;
  padding: 22px 8px 40px 32px;
}
.menu-content-head{
  display:flex;
  gap: 14px;
  align-items:flex-start;
  margin-bottom: 24px;
}
.menu-content-icon{ font-size: 26px; color: var(--gold); }
.menu-content-head h2{
  font-family: var(--font-head);
  font-weight:600;
  font-size: 22px;
  color: var(--cream);
  margin-bottom: 8px;
}
.menu-content-intro{ color: var(--cream-dim); font-size: 14px; line-height:1.7; }

.menu-section{
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.menu-section h3{ font-size: 14.5px; color: var(--gold-bright); margin-bottom:8px; }
.menu-section p{ font-size: 13.5px; color: var(--cream-dim); line-height:1.75; }

.menu-cta-row{ display:flex; flex-wrap:wrap; gap:10px; margin-top: 22px; }
.menu-cta{
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold-bright);
  font-size: 13px;
  font-weight:600;
  padding: 10px 16px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
}
.menu-cta:hover{ background: var(--gold); color: var(--black); }

/* ===== 외부 이동 확인 모달 ===== */
.modal-overlay{
  position: fixed; inset:0;
  z-index: 80;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transition: opacity .2s ease;
}
.modal-overlay.open{ opacity:1; pointer-events:auto; }

.modal-backdrop{ position:absolute; inset:0; background: rgba(0,0,0,0.6); }

.modal-box{
  position:relative;
  width: min(360px, 88vw);
  background: var(--black-soft);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 26px 24px;
  transform: translateY(8px);
  transition: transform .2s ease;
}
.modal-overlay.open .modal-box{ transform: translateY(0); }

.modal-title{ font-size: 15px; font-weight:600; color: var(--gold-bright); margin-bottom: 10px; }
.modal-desc{ font-size: 13.5px; color: var(--cream-dim); line-height:1.7; margin-bottom: 22px; }
.modal-actions{ display:flex; justify-content:flex-end; gap: 10px; }
.modal-btn{
  font-size: 13px;
  font-weight:600;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background:transparent;
  color: var(--cream);
}
.modal-btn-ghost:hover{ border-color: var(--cream); }
.modal-btn-solid{ background: var(--gold); border-color: var(--gold); color: var(--black); }
.modal-btn-solid:hover{ background: var(--gold-bright); }

/* ===== Responsive ===== */
@media (max-width: 900px){
  .topbar{ padding: 14px 16px; }
  .btn-store{ font-size:12px; padding:8px 12px; }
  .brand-sub{ display:none; }

  .conversation-view{
    grid-template-columns: 1fr;
    grid-template-rows: 1.3fr 1fr;
  }
  .thread{ border-right:none; border-bottom: 1px solid var(--line); padding: 18px 18px 24px; }
  .cards-panel{ padding: 18px 18px 24px; }

  .composer{ padding: 12px 14px 16px; }
  .chip-row{ flex-wrap: nowrap; overflow-x:auto; padding-bottom:2px; }
  .chip{ white-space:nowrap; }

  .welcome-view h1{ font-size: 20px; }

  .menu-view{ padding: 16px 16px 0; }
  .menu-body{
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .menu-nav{
    border-right:none;
    border-bottom: 1px solid var(--line);
    flex-direction: row;
    flex-wrap: wrap;
    padding: 14px 0;
  }
  .menu-content{ padding: 18px 4px 32px; }
}