:root {
  --page: #eef5ff;
  --page2: #f8fbff;
  --sidebar: #0b1220;
  --sidebar2: #111c33;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --text: #0b1220;
  --text-soft: #334155;
  --muted: #64748b;
  --line: #dbe5f2;
  --line-strong: #c7d2e5;
  --primary: #4f67ff;
  --primary2: #3548e5;
  --primary-soft: #eef2ff;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #f59e0b;
  --shadow: 0 18px 50px rgba(15, 23, 42, .12);
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, .08);
  --radius: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  color: var(--text);
  min-height: 100vh;
  background:
    radial-gradient(circle at 22% -8%, rgba(79, 103, 255, .18), transparent 34%),
    radial-gradient(circle at 86% 12%, rgba(14, 165, 233, .14), transparent 34%),
    linear-gradient(180deg, var(--page2), var(--page));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 23, 42, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, .035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.75), transparent 70%);
}

button, input, textarea, select { font: inherit; }
button {
  border: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: #fff;
  padding: 11px 15px;
  border-radius: 14px;
  font-weight: 850;
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, filter .16s ease;
  box-shadow: 0 10px 20px rgba(79, 103, 255, .22);
}
button:hover { transform: translateY(-1px); filter: brightness(1.03); }
button:active { transform: translateY(0); }
button.secondary { background: #edf2fb; color: #0f172a; box-shadow: none; }
button.secondary:hover { background: #e2e8f7; }
button.ghost { background: rgba(255,255,255,.78); color: var(--primary2); border: 1px solid var(--line); box-shadow: none; }
button.ghost:hover { background: #f5f8ff; }
button.danger { background: #fff1f2; color: var(--danger); box-shadow: none; }
button.danger:hover { background: #ffe4e6; }
button.small { padding: 7px 9px; border-radius: 11px; font-size: 12px; }
button.full { width: 100%; margin-top: 8px; }

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 11px 13px;
  outline: none;
  background: #fff;
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(15, 23, 42, .02);
}
input::placeholder, textarea::placeholder { color: #94a3b8; }
input:focus, textarea:focus, select:focus {
  border-color: rgba(79, 103, 255, .72);
  box-shadow: 0 0 0 4px rgba(79, 103, 255, .13);
}
textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.58;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
  position: relative;
  z-index: 1;
}
.sidebar {
  padding: 24px 20px;
  color: #fff;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  background:
    radial-gradient(circle at 30% 0%, rgba(96, 165, 250, .22), transparent 35%),
    linear-gradient(180deg, var(--sidebar2), var(--sidebar));
  border-right: 1px solid rgba(255,255,255,.08);
}
.sidebar::-webkit-scrollbar { width: 10px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); border-radius: 999px; }
.main {
  padding: 32px;
  max-width: 1240px;
  width: 100%;
}

.brand { display: flex; gap: 13px; align-items: center; margin-bottom: 24px; }
.logo {
  width: 50px;
  height: 50px;
  border-radius: 17px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #93c5fd, #6366f1);
  color: #07111f;
  font-weight: 950;
  box-shadow: 0 14px 25px rgba(37, 99, 235, .26);
}
.brand h1 { margin: 0; font-size: 21px; letter-spacing: -.02em; color: #f8fafc; }
.brand p { margin: 2px 0 0; color: #b9c7da; font-size: 13px; }

.panel {
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(219,229,242,.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
}
.sidebar .panel {
  color: var(--text);
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(255,255,255,.68);
  box-shadow: 0 12px 28px rgba(0,0,0,.2);
}
.compact { padding: 16px; margin-bottom: 14px; }
.row { display: flex; align-items: center; }
.gap { gap: 8px; }
.hint { color: var(--muted); font-size: 13px; line-height: 1.5; }
code {
  background: #eef2ff;
  color: #334155;
  padding: 2px 6px;
  border-radius: 7px;
  border: 1px solid #e0e7ff;
}

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; text-align: center; }
.stat-grid div {
  background: linear-gradient(180deg, #ffffff, #f6f8fc);
  padding: 14px 6px;
  border-radius: 16px;
  border: 1px solid #eef2f7;
}
.stat-grid strong { display: block; font-size: 26px; letter-spacing: -.04em; }
.stat-grid span { color: var(--muted); font-size: 12px; }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 11px; }
.chip {
  background: #f1f5f9;
  color: #334155;
  padding: 8px 11px;
  font-size: 12px;
  box-shadow: none;
}
.chip.active { background: linear-gradient(135deg, var(--primary), var(--primary2)); color: #fff; }
.sync { font-size: 12px; color: var(--muted); margin-bottom: 0; }

.hero {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 22px;
  padding: 30px;
  border-radius: 30px;
  color: #fff;
  background:
    radial-gradient(circle at 94% 8%, rgba(125, 211, 252, .35), transparent 28%),
    linear-gradient(135deg, #0b1220 0%, #152341 48%, #2445d8 100%);
  border: 1px solid rgba(255,255,255,.16);
  box-shadow: 0 24px 65px rgba(15, 23, 42, .22);
  overflow: hidden;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,.11);
}
.hero > * { position: relative; z-index: 1; }
.eyebrow { color: #a5b4fc; font-size: 12px; font-weight: 950; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 8px; }
.hero h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(28px, 4.2vw, 50px);
  letter-spacing: -0.055em;
  line-height: 1.04;
  max-width: 900px;
  text-shadow: 0 3px 14px rgba(0,0,0,.22);
}
.hero p { color: #d7e4ff; max-width: 780px; font-size: 15px; }
.hero-actions { display: flex; gap: 9px; flex-wrap: wrap; justify-content: flex-end; min-width: 255px; }
.hero-actions .secondary { background: rgba(255,255,255,.9); color: #0b1220; }

.composer { padding: 20px; margin-bottom: 24px; }
.composer-head, .composer-tools, .cards-toolbar { display: flex; justify-content: space-between; gap: 14px; align-items: center; }
.composer h3, .cards-toolbar h3 { margin: 0; font-size: 21px; letter-spacing: -.03em; }
.composer p { margin: 5px 0 0; color: var(--muted); }
#aiInput { margin-top: 15px; min-height: 225px; background: linear-gradient(180deg, #fff, #fbfdff); }
.composer-tools { margin-top: 12px; }
.cards-toolbar { margin: 22px 0 13px; }
.cards-toolbar h3 { font-size: 24px; }
.cards { display: grid; gap: 17px; }

.card {
  background: rgba(255,255,255,.98);
  border: 1px solid rgba(211, 222, 238, .95);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.card:hover { box-shadow: var(--shadow); }
.card-top {
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto;
  gap: 13px;
  align-items: center;
  padding: 17px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}
.step-badge {
  min-width: 58px;
  height: 45px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: #e0e7ff;
  color: #3730a3;
  font-weight: 950;
  border: 1px solid #c7d2fe;
}
.title-input { font-weight: 950; font-size: 18px; border: 0; padding: 3px 0; background: transparent; box-shadow: none !important; }
.meta-line { color: var(--muted); font-size: 12px; }
.status-controls { display: flex; gap: 7px; align-items: center; }
.status-select { width: 88px; padding: 7px 8px; font-size: 12px; }
.card[data-status="done"] .step-badge { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.card[data-status="error"] .step-badge { background: #fee2e2; color: #991b1b; border-color: #fecaca; }

.markdown-box { margin: 0 17px 15px; border: 1px solid var(--line); border-radius: 18px; background: #fff; overflow: hidden; }
.markdown-box summary { cursor: pointer; padding: 13px 15px; font-weight: 900; background: #f8fafc; border-bottom: 1px solid var(--line); color: #111827; }
.markdown-preview, .result-preview { padding: 15px; overflow: auto; color: #1e293b; }
.markdown-preview h1, .markdown-preview h2, .markdown-preview h3,
.result-preview h1, .result-preview h2, .result-preview h3 { color: #0b1220; letter-spacing: -.03em; }
.markdown-preview pre, .result-preview pre {
  background: #0b1220;
  color: #e5eefb;
  padding: 15px;
  border-radius: 14px;
  overflow: auto;
  border: 1px solid #1f2a44;
}
.markdown-preview code, .result-preview code { background: #eef2ff; }
.markdown-preview pre code, .result-preview pre code { background: transparent; padding: 0; border: 0; color: inherit; }
.markdown-preview table, .result-preview table { border-collapse: collapse; width: 100%; }
.markdown-preview th, .markdown-preview td, .result-preview th, .result-preview td { border: 1px solid var(--line); padding: 8px; }

.commands-box {
  margin: 0 17px 15px;
  border: 1px solid #bdd7ff;
  border-radius: 18px;
  background: linear-gradient(180deg, #eff6ff, #f8fbff);
  overflow: hidden;
}
.commands-head { display: flex; justify-content: space-between; align-items: center; padding: 11px 15px; color: #1e3a8a; }
.commands-pre {
  margin: 0;
  padding: 14px 15px;
  background: #dbeafe;
  color: #0f172a;
  white-space: pre-wrap;
  overflow: auto;
  max-height: 230px;
  border-top: 1px solid #bfdbfe;
}
.commands-box.empty { display: none; }
.result-label { display: block; margin: 0 17px 8px; font-weight: 950; color: #0f172a; }
.result-input {
  display: block;
  width: calc(100% - 34px);
  margin: 0 17px 15px;
  min-height: 185px;
  background: #0b1220;
  color: #e5eefb;
  border-color: #1f2a44;
}
.result-input::placeholder { color: #94a3b8; }
.result-input:focus { border-color: #7dd3fc; box-shadow: 0 0 0 4px rgba(125, 211, 252, .16); }
.result-preview-box { margin-bottom: 17px; }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  max-width: 380px;
  background: #0b1220;
  color: white;
  padding: 13px 15px;
  border-radius: 16px;
  box-shadow: 0 20px 45px rgba(0,0,0,.24);
  z-index: 30;
}

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .main { padding: 18px; }
  .hero, .composer-head, .composer-tools, .cards-toolbar { flex-direction: column; align-items: stretch; }
  .card-top { grid-template-columns: 1fr; }
  .status-controls { flex-wrap: wrap; }
}