/* b.talks — 작가와의 만남 (btalk.html) */

.page-btalk {
  /* 포스터 톤: 잔디 딥 그린 + 크림 타이포 + 포인트 레드 */
  --bt-forest: #2d3b2d;
  --bt-forest-deep: #1f2920;
  --bt-forest-soft: #3d5140;
  --bt-cream-fg: #ece8dc;
  --bt-cream-pale: #e5e1c1;
  --bt-red: #b52f28;
  --bt-red-deep: #94261f;
  --bt-paper-warm: #f7f4ec;
  --bt-paper: #ebe6dc;
  --bt-ink: #1e241e;
  --bt-muted: #5a6356;
  --bt-card-border: #d5d0c4;
  --bt-radius: 14px;
  --bt-shadow: 0 10px 36px rgba(25, 35, 25, 0.1);
  --bt-navy: var(--bt-forest);
  --bt-navy-soft: var(--bt-forest-soft);
  --bt-accent: var(--bt-red);
  --bt-accent-soft: var(--bt-cream-pale);
  --bt-cream: var(--bt-paper-warm);
  font-family: 'Noto Sans KR', sans-serif;
  background: linear-gradient(180deg, var(--bt-paper-warm) 0%, var(--bt-paper) 50%, #e3ddd2 100%);
  color: var(--bt-ink);
  min-height: 100vh;
}

/* 상단 네비 */
.btalk-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(247, 244, 236, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(45, 59, 45, 0.1);
  padding: 12px 20px;
}
.btalk-nav-inner {
  max-width: 920px;
  margin: 0 auto;
}
.btalk-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--bt-navy);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.15s ease, transform 0.15s ease;
}
.btalk-back:hover {
  color: var(--bt-navy-soft);
  transform: translateX(-2px);
}

/* 히어로 — 포스터와 같은 딥 그린 + 크림 글자 */
.btalk-hero {
  background: linear-gradient(165deg, var(--bt-forest-deep) 0%, var(--bt-forest) 42%, #354535 100%);
  color: var(--bt-cream-fg);
  text-align: center;
  padding: 44px 22px 48px;
  position: relative;
  overflow: hidden;
}
.btalk-hero::before {
  content: '';
  position: absolute;
  top: -35%;
  right: -25%;
  width: 75%;
  max-width: 440px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(181, 47, 40, 0.14) 0%, transparent 68%);
  pointer-events: none;
}
.btalk-hero::after {
  content: '';
  position: absolute;
  bottom: -35%;
  left: -20%;
  width: 55%;
  max-width: 300px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 65%);
  pointer-events: none;
}
.btalk-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}
.btalk-badge {
  display: inline-block;
  font-family: 'Noto Serif KR', serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--bt-cream-pale);
  border: 1px solid rgba(229, 225, 193, 0.35);
  border-radius: 20px;
  padding: 5px 14px;
  margin-bottom: 20px;
}
.btalk-title-lines {
  margin: 0 0 18px;
  padding: 0;
  font-family: 'Noto Sans KR', sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 6.2vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--bt-cream-pale);
}
.btalk-title-line {
  display: block;
}
.btalk-hero-books {
  font-size: 15px;
  font-weight: 400;
  color: rgba(236, 232, 220, 0.92);
  line-height: 1.55;
  margin-bottom: 14px;
}
.btalk-hero-books strong {
  font-weight: 700;
  color: #fff;
}
.btalk-brand {
  font-family: 'Noto Serif KR', serif;
  font-size: 13px;
  color: rgba(229, 225, 193, 0.72);
  letter-spacing: 0.1em;
  margin-bottom: 22px;
}
.btalk-hero-divider {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--bt-red), transparent);
  margin: 0 auto 22px;
  border-radius: 2px;
  opacity: 0.95;
}
.btalk-hero-signing {
  margin: 0 auto 22px;
  max-width: 440px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--bt-cream-fg);
  text-align: center;
  background: rgba(181, 47, 40, 0.28);
  border: 1px solid rgba(255, 220, 210, 0.35);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}
.btalk-hero-signing strong {
  color: #fff;
  font-weight: 700;
}
.btalk-hero-signing-icon {
  margin-right: 8px;
}
.btalk-meta-grid {
  display: grid;
  gap: 12px;
  text-align: left;
  max-width: 400px;
  margin: 0 auto;
}
.btalk-meta-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(236, 232, 220, 0.95);
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.btalk-meta-note {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  opacity: 0.88;
  font-weight: 400;
}
.btalk-meta-icon {
  flex-shrink: 0;
  width: 22px;
  text-align: center;
  opacity: 0.9;
}
.btalk-meta-label {
  font-weight: 700;
  color: var(--bt-cream-pale);
  min-width: 52px;
}

/* 포스터 2장 */
.btalk-poster-section {
  padding: 36px 20px 44px;
  background: linear-gradient(180deg, #e8e4da 0%, var(--bt-paper-warm) 100%);
  border-bottom: 1px solid rgba(45, 59, 45, 0.08);
}
.btalk-poster-inner {
  max-width: 960px;
  margin: 0 auto;
}
.btalk-poster-heading {
  font-family: 'Noto Serif KR', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--bt-forest-deep);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.btalk-poster-lead {
  text-align: center;
  font-size: 14px;
  color: var(--bt-muted);
  margin-bottom: 24px;
  line-height: 1.55;
}
.btalk-poster-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}
@media (max-width: 720px) {
  .btalk-poster-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }
}
.btalk-poster-grid.is-random-one {
  grid-template-columns: 1fr;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.btalk-poster-card {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  background: #1a221a;
  box-shadow: 0 12px 40px rgba(20, 28, 20, 0.18), 0 0 0 1px rgba(255, 255, 255, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btalk-poster-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 48px rgba(20, 28, 20, 0.22), 0 0 0 1px rgba(255, 255, 255, 0.1);
}
.btalk-poster-card img {
  display: block;
  width: 100%;
  height: auto;
}

/* 본문 래퍼 */
.btalk-main {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 20px 72px;
}

.btalk-section {
  margin-bottom: 48px;
}
.btalk-section-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--bt-forest-deep);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.btalk-section-lead {
  font-size: 14px;
  color: var(--bt-muted);
  margin-bottom: 22px;
  line-height: 1.6;
}

/* 작가 소개 카드 */
.btalk-author-card {
  background: #fff;
  border-radius: var(--bt-radius);
  border: 1px solid var(--bt-card-border);
  box-shadow: var(--bt-shadow);
  padding: 24px 22px;
  display: grid;
  gap: 14px;
}
.btalk-author-name {
  font-family: 'Noto Serif KR', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--bt-navy);
}
.btalk-author-role {
  font-size: 14px;
  color: var(--bt-muted);
}
.btalk-author-books {
  font-size: 14px;
  color: var(--bt-ink);
  line-height: 1.65;
}
.btalk-author-books em {
  font-style: normal;
  font-weight: 600;
  color: var(--bt-navy);
}

/* 책 카드 그리드 */
.btalk-books {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
@media (max-width: 640px) {
  .btalk-books {
    grid-template-columns: 1fr;
  }
}

.btalk-book-wrap {
  position: relative;
}
.btalk-book-card {
  display: block;
  width: 100%;
  cursor: pointer;
  height: 100%;
  text-align: left;
  font: inherit;
  padding: 0;
  background: #fff;
  border-radius: var(--bt-radius);
  border: 2px solid var(--bt-card-border);
  box-shadow: 0 4px 16px rgba(28, 38, 28, 0.05);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.btalk-book-card:hover {
  border-color: rgba(28, 38, 28, 0.22);
  box-shadow: 0 8px 28px rgba(28, 38, 28, 0.1);
}
.btalk-book-wrap button:focus-visible {
  outline: 2px solid var(--bt-accent);
  outline-offset: 3px;
}
.btalk-book-wrap.is-selected .btalk-book-card {
  border-color: var(--bt-navy);
  box-shadow: 0 0 0 1px var(--bt-navy), 0 12px 36px rgba(28, 38, 28, 0.14);
  transform: translateY(-2px);
}
.btalk-book-cover {
  aspect-ratio: 2 / 3;
  max-height: 280px;
  width: 100%;
  object-fit: cover;
  display: block;
  background: #e8e4dc;
}
.btalk-book-body {
  padding: 16px 16px 18px;
}
.btalk-book-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--bt-navy);
  margin-bottom: 6px;
  line-height: 1.35;
}
.btalk-book-price {
  font-size: 14px;
  font-weight: 700;
  color: var(--bt-red-deep);
  margin-bottom: 10px;
}
.btalk-book-desc {
  font-size: 13px;
  color: var(--bt-muted);
  line-height: 1.65;
  font-weight: 400;
}

/* 도서 선택 — 라디오 영역 */
.btalk-form-block {
  background: #fff;
  border-radius: var(--bt-radius);
  border: 1px solid var(--bt-card-border);
  box-shadow: var(--bt-shadow);
  padding: 22px 20px 24px;
  margin-bottom: 20px;
}
.btalk-form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--bt-navy);
  margin-bottom: 10px;
}
.btalk-form-label .req {
  color: #b45309;
  font-weight: 600;
  font-size: 12px;
  margin-left: 4px;
}

.btalk-field {
  margin-bottom: 18px;
}
.btalk-field:last-child {
  margin-bottom: 0;
}
.btalk-input {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  font-family: 'Noto Sans KR', sans-serif;
  border: 1px solid #d4cec2;
  border-radius: 10px;
  background: #fdfcfa;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.btalk-input:focus {
  outline: none;
  border-color: var(--bt-navy);
  box-shadow: 0 0 0 3px rgba(28, 38, 28, 0.08);
}

.btalk-check-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  padding: 12px 14px;
  background: #f8f6f0;
  border-radius: 10px;
  border: 1px solid #e5dfd4;
}
.btalk-check-row input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--bt-navy);
  flex-shrink: 0;
}
.btalk-check-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--bt-ink);
}
.btalk-check-hint {
  display: none;
  margin-top: 10px;
  font-size: 13px;
  color: #166534;
  background: #ecfdf3;
  border: 1px solid #bbf7d0;
  padding: 10px 12px;
  border-radius: 8px;
  line-height: 1.5;
}
.btalk-check-row-wrap.is-on .btalk-check-hint {
  display: block;
}

.btalk-radio-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.btalk-radio-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #e0d8c8;
  background: #fdfcfa;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.btalk-radio-item:hover {
  border-color: rgba(28, 38, 28, 0.25);
}
.btalk-radio-item.is-checked {
  border-color: var(--bt-navy);
  background: rgba(28, 38, 28, 0.04);
}
.btalk-radio-item input {
  accent-color: var(--bt-navy);
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.btalk-radio-item.is-disabled {
  cursor: not-allowed;
  opacity: 0.65;
}
.btalk-radio-item.is-disabled span {
  cursor: not-allowed;
}
.btalk-radio-item span {
  font-size: 14px;
  color: var(--bt-ink);
  line-height: 1.45;
}

.btalk-owner-book-hint {
  display: none;
  margin-top: 10px;
  font-size: 13px;
  color: #92400e;
  background: #fffbeb;
  border: 1px solid #fde68a;
  padding: 10px 12px;
  border-radius: 8px;
  line-height: 1.5;
}
.btalk-owner-book-hint.is-visible {
  display: block;
}

/* 금액 요약 */
.btalk-total-box {
  background: linear-gradient(135deg, var(--bt-forest-deep) 0%, var(--bt-forest) 55%, var(--bt-forest-soft) 100%);
  color: var(--bt-cream-fg);
  border-radius: var(--bt-radius);
  padding: 20px 22px;
  margin-bottom: 20px;
}
.btalk-total-rows {
  font-size: 14px;
  line-height: 1.8;
  opacity: 0.95;
  margin-bottom: 12px;
}
.btalk-total-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 4px;
}
.btalk-total-row span:last-child {
  font-weight: 600;
  white-space: nowrap;
}
.btalk-total-final {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-family: 'Noto Serif KR', serif;
  font-size: 20px;
  font-weight: 700;
}
.btalk-total-final span:last-child {
  font-size: 24px;
  color: #fff;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

/* 계좌 안내 블록 */
.btalk-bank-preview {
  background: #fff;
  border: 1px dashed var(--bt-card-border);
  border-radius: var(--bt-radius);
  padding: 18px 20px;
  font-size: 14px;
  color: var(--bt-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}
.btalk-bank-preview strong {
  color: var(--bt-navy);
  font-weight: 700;
}

.btalk-submit {
  width: 100%;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Noto Sans KR', sans-serif;
  color: #fff;
  background: linear-gradient(180deg, var(--bt-red) 0%, var(--bt-red-deep) 100%);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  letter-spacing: 0.04em;
  box-shadow: 0 6px 22px rgba(148, 38, 31, 0.35);
  transition: filter 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.btalk-submit:hover {
  filter: brightness(1.06);
  box-shadow: 0 8px 28px rgba(148, 38, 31, 0.42);
}
.btalk-submit:active {
  transform: scale(0.99);
}
.btalk-submit:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* 아카이브 */
.btalk-archive {
  background: #fff;
  border: 1px solid var(--bt-card-border);
  border-radius: var(--bt-radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--bt-shadow);
}
.btalk-archive-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--bt-navy);
  margin-bottom: 10px;
}
.btalk-archive-placeholder {
  font-size: 14px;
  color: var(--bt-muted);
}

/* 푸터 */
.btalk-footer {
  text-align: center;
  padding: 28px 20px 40px;
  font-size: 12px;
  color: var(--bt-muted);
}

/* 모달 */
.btalk-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1200;
  background: rgba(20, 28, 22, 0.58);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.btalk-modal-overlay.is-open {
  display: flex;
}
.btalk-modal-overlay[aria-hidden='true'] {
  pointer-events: none;
}
.btalk-modal {
  background: #fff;
  border-radius: 16px;
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.25);
  animation: btalkModalIn 0.22s ease;
}
@keyframes btalkModalIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.btalk-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  color: var(--bt-muted);
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}
.btalk-modal-close:hover {
  background: #ebe6dc;
  color: var(--bt-forest);
}
.btalk-modal-head {
  padding: 28px 24px 16px;
  text-align: center;
  border-bottom: 1px solid #ebe6dc;
}
.btalk-modal-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--bt-forest-deep);
  background: rgba(45, 59, 45, 0.1);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.btalk-modal-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--bt-navy);
}
.btalk-modal-body {
  padding: 22px 24px 24px;
}
.btalk-modal-amount {
  text-align: center;
  margin-bottom: 20px;
}
.btalk-modal-amount-label {
  font-size: 13px;
  color: var(--bt-muted);
  margin-bottom: 6px;
}
.btalk-modal-amount-value {
  font-family: 'Noto Serif KR', serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--bt-navy);
  letter-spacing: -0.02em;
}
.btalk-modal-bank {
  background: #f8f6f0;
  border: 1px solid #e5dfd4;
  border-radius: 12px;
  padding: 18px 16px;
  text-align: center;
  margin-bottom: 16px;
}
.btalk-modal-bank-name {
  font-size: 14px;
  color: var(--bt-muted);
  margin-bottom: 8px;
}
.btalk-modal-account {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: clamp(17px, 4.5vw, 22px);
  font-weight: 700;
  color: var(--bt-navy);
  letter-spacing: 0.04em;
  word-break: break-all;
  line-height: 1.4;
}
.btalk-modal-holder {
  margin-top: 10px;
  font-size: 14px;
  color: var(--bt-ink);
  font-weight: 600;
}
.btalk-modal-copy {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  font-weight: 700;
  font-family: 'Noto Sans KR', sans-serif;
  color: var(--bt-navy);
  background: #fff;
  border: 2px solid var(--bt-navy);
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 12px;
  transition: background 0.15s ease, color 0.15s ease;
}
.btalk-modal-copy:hover {
  background: var(--bt-forest);
  border-color: var(--bt-forest);
  color: #fff;
}
.btalk-modal-note {
  font-size: 12px;
  color: var(--bt-muted);
  text-align: center;
  line-height: 1.55;
}