/* BookSpace — clean SaaS booking preview.
   Self-contained: defines its own tokens, independent of the IOTA shell. */

:root {
  --b-bg: #f1f5f9;
  --b-surface: #ffffff;
  --b-ink: #0f172a;
  --b-soft: #64748b;
  --b-line: #e2e8f0;
  --b-accent: #0284c7;
  --b-accent-soft: #e0f2fe;
  --b-radius: 12px;
}

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

body {
  font-family: "Pretendard Variable", Pretendard, "Apple SD Gothic Neo",
               "Noto Sans KR", -apple-system, sans-serif;
  background: var(--b-bg);
  color: var(--b-ink);
  line-height: 1.65;
  word-break: keep-all;
}

a { color: inherit; }

/* Preview banner */
.preview-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1.5rem;
  background: var(--b-ink);
  color: #f1f5f9;
  font-size: 0.85rem;
}

.preview-banner a { color: #7dd3fc; text-decoration: none; }
.preview-banner a:hover { text-decoration: underline; }

/* Header */
.bk-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1rem, 5vw, 3rem);
  background: var(--b-surface);
  border-bottom: 1px solid var(--b-line);
}

.bk-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

.bk-logo span { color: var(--b-accent); font-size: 1.3rem; }

.bk-nav { display: flex; gap: 1.5rem; align-items: center; }

.bk-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--b-soft);
  text-decoration: none;
}

.bk-nav a:hover { color: var(--b-ink); }

.bk-nav .bk-login {
  padding: 0.45em 1.2em;
  border-radius: 999px;
  background: var(--b-accent);
  color: #fff;
}

/* Hero */
.bk-hero {
  text-align: center;
  padding: 4rem 1.5rem 2.5rem;
}

.bk-hero h1 {
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.bk-hero p { color: var(--b-soft); max-width: 46ch; margin: 0 auto; }

/* Booking card */
.bk-booking { padding: 1rem 1.5rem 4rem; }

.bk-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--b-surface);
  border: 1px solid var(--b-line);
  border-radius: var(--b-radius);
  padding: 2rem;
  box-shadow: 0 10px 30px rgb(15 23 42 / 0.07);
}

.bk-card h2 { font-size: 1.25rem; margin-bottom: 1.5rem; }

.bk-field { margin-bottom: 1.4rem; }

.bk-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--b-soft);
  margin-bottom: 0.5rem;
}

.bk-options { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.bk-option {
  padding: 0.5em 1em;
  border: 1px solid var(--b-line);
  border-radius: 8px;
  background: var(--b-surface);
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s;
}

.bk-option:hover:not(:disabled) { border-color: var(--b-accent); }

.bk-option.is-selected {
  background: var(--b-accent-soft);
  border-color: var(--b-accent);
  color: var(--b-accent);
}

.bk-option:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  text-decoration: line-through;
}

.bk-date {
  font: inherit;
  padding: 0.55em 0.9em;
  border: 1px solid var(--b-line);
  border-radius: 8px;
  color: var(--b-ink);
}

.bk-submit {
  width: 100%;
  padding: 0.85em;
  border: none;
  border-radius: 8px;
  background: var(--b-accent);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  transition: filter 0.15s;
}

.bk-submit:hover { filter: brightness(1.08); }

.bk-note {
  margin-top: 0.9rem;
  font-size: 0.8rem;
  color: var(--b-soft);
  text-align: center;
}

/* Spaces */
.bk-spaces { padding: 2rem clamp(1rem, 5vw, 3rem) 5rem; max-width: 1080px; margin: 0 auto; }

.bk-spaces h2 { font-size: 1.4rem; margin-bottom: 1.5rem; }

.bk-space-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.bk-space {
  background: var(--b-surface);
  border: 1px solid var(--b-line);
  border-radius: var(--b-radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.bk-space:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgb(15 23 42 / 0.1);
}

.bk-space__img {
  height: 120px;
  display: grid;
  place-items: center;
  font-size: 2.4rem;
  background: linear-gradient(135deg, var(--b-accent-soft), #bae6fd);
}

.bk-space h3 { padding: 0.9rem 1.1rem 0; font-size: 1rem; }
.bk-space p { padding: 0.2rem 1.1rem 1.1rem; font-size: 0.85rem; color: var(--b-soft); }

/* Footer */
.bk-footer {
  padding: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--b-soft);
}