/* ================================
   CSS 커스텀 프로퍼티
================================ */
:root {
  /* 색상 토큰 — 네이버 그린 브랜딩 */
  --accent:        #03C75A;
  --accent-light:  #05e06a;
  --accent-dark:   #02A64B;
  --accent-glow:   rgba(3, 199, 90, 0.35);

  --glass-bg:      rgba(255, 255, 255, 0.055);
  --glass-bg-md:   rgba(255, 255, 255, 0.09);
  --glass-bg-lg:   rgba(255, 255, 255, 0.13);
  --glass-border:  rgba(255, 255, 255, 0.10);
  --glass-border-md: rgba(255, 255, 255, 0.16);

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  --success: #22c55e;
  --error:   #f43f5e;
  --warning: #f59e0b;

  --radius-card: 16px;
  --radius-btn:  12px;
  --radius-input: 10px;

  --blur-sm: blur(12px);
  --blur-md: blur(20px);
  --blur-lg: blur(32px);
}

/* ================================
   리셋 & 기본
================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  color: var(--text-primary);

  /* 다크 그라디언트 배경 — 네이버 그린 glow */
  background-color: #080c10;
  background-image:
    radial-gradient(ellipse at 15% 40%, rgba(3,  199,  90, 0.11) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 15%, rgba(5,  224, 106, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 65% 85%, rgba(2,  166,  75, 0.07) 0%, transparent 50%);
  background-attachment: fixed;
}

/* ================================
   글래스 패널 공통
================================ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md) saturate(180%);
  -webkit-backdrop-filter: var(--blur-md) saturate(180%);
  border: 1px solid var(--glass-border);
}

/* ================================
   헤더
================================ */
.glass-header {
  background: rgba(8, 12, 16, 0.75);
  backdrop-filter: var(--blur-lg) saturate(200%);
  -webkit-backdrop-filter: var(--blur-lg) saturate(200%);
  border-bottom: 1px solid var(--glass-border);
}

.header-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(3,199,90,0.3), rgba(2,166,75,0.2));
  border: 1px solid rgba(3,199,90,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.settings-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
}
.settings-btn:hover {
  background: var(--glass-bg-md);
  border-color: var(--glass-border-md);
  color: var(--text-primary);
}
.settings-btn.key-saved {
  border-color: rgba(34, 197, 94, 0.4);
  color: #4ade80;
}

/* ================================
   스텝 네비게이터
================================ */
.glass-nav {
  background: rgba(8, 12, 16, 0.5);
  backdrop-filter: var(--blur-sm) saturate(150%);
  -webkit-backdrop-filter: var(--blur-sm) saturate(150%);
  border-bottom: 1px solid var(--glass-border);
}

.step-item {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: default;
  user-select: none;
}

.step-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.25s ease;
}

/* 완료 */
.step-item.completed .step-circle {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  box-shadow: 0 0 12px var(--accent-glow);
}
.step-item.completed .step-label { color: var(--accent-light); font-weight: 600; }
.step-item.completed { cursor: pointer; }

/* 현재 */
.step-item.active .step-circle {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  color: white;
  box-shadow: 0 0 18px var(--accent-glow), 0 0 0 3px rgba(3,199,90,0.2);
}
.step-item.active .step-label { color: white; font-weight: 700; }

/* 미완료 */
.step-item.pending .step-circle {
  background: var(--glass-bg-md);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
}
.step-item.pending .step-label { color: var(--text-muted); }

.step-label { font-size: 14px; white-space: nowrap; }
.step-arrow  { color: var(--text-muted); font-size: 15px; flex-shrink: 0; opacity: 0.5; }

/* ================================
   하단 푸터
================================ */
.glass-footer {
  background: rgba(8, 12, 16, 0.75);
  backdrop-filter: var(--blur-lg) saturate(200%);
  -webkit-backdrop-filter: var(--blur-lg) saturate(200%);
  border-top: 1px solid var(--glass-border);
}

/* ================================
   버튼 시스템
================================ */
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--accent-glow);
  transition: all 0.2s ease;
  font-family: 'Pretendard', sans-serif;
}
.btn-accent:hover {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  box-shadow: 0 6px 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-accent:active { transform: translateY(0); }
.btn-accent:disabled {
  background: var(--glass-bg-md);
  box-shadow: none;
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'Pretendard', sans-serif;
}
.btn-ghost:hover {
  background: var(--glass-bg-md);
  border-color: var(--glass-border-md);
  color: var(--text-primary);
}
.btn-ghost:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.btn-danger {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.25);
  color: #fb7185;
  cursor: pointer;
  border-radius: var(--radius-btn);
  padding: 8px 16px;
  font-family: 'Pretendard', sans-serif;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s ease;
}
.btn-danger:hover {
  background: rgba(244, 63, 94, 0.18);
  border-color: rgba(244, 63, 94, 0.4);
}

/* ================================
   카드
================================ */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-md) saturate(160%);
  -webkit-backdrop-filter: var(--blur-md) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: border-color 0.2s ease;
}
.card:hover { border-color: var(--glass-border-md); }

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ================================
   입력 (공통)
================================ */
.input-base {
  width: 100%;
  padding: 11px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border-md);
  border-radius: var(--radius-input);
  font-family: 'Pretendard', sans-serif;
  font-size: 15px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input-base::placeholder { color: var(--text-muted); }
.input-base:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(3, 199, 90, 0.18);
  background: rgba(255, 255, 255, 0.07);
}

/* ================================
   모달
================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}
.modal-overlay.hidden { display: none; }

.modal-box {
  background: rgba(12, 18, 14, 0.92);
  backdrop-filter: var(--blur-lg) saturate(200%);
  -webkit-backdrop-filter: var(--blur-lg) saturate(200%);
  border: 1px solid var(--glass-border-md);
  border-radius: 20px;
  padding: 28px;
  width: 100%;
  max-width: 480px;
  box-shadow:
    0 25px 60px rgba(0,0,0,0.5),
    0 0 0 1px rgba(255,255,255,0.04) inset;
  animation: modal-in 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.93) translateY(-12px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border-md);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-family: 'Pretendard', monospace;
  font-size: 14px;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  letter-spacing: 0.03em;
}
.modal-input::placeholder { color: var(--text-muted); }
.modal-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(3, 199, 90, 0.18);
}

.modal-icon-btn {
  background: var(--glass-bg-md);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-input);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  font-size: 15px;
}
.modal-icon-btn:hover {
  background: var(--glass-bg-lg);
  border-color: var(--glass-border-md);
}

.modal-info-box {
  background: rgba(3, 199, 90, 0.07);
  border: 1px solid rgba(3, 199, 90, 0.2);
  color: var(--text-secondary);
  line-height: 1.7;
}

.modal-close-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}
.modal-close-btn:hover { background: var(--glass-bg-md); }

/* ================================
   토스트 알림
================================ */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(12, 18, 14, 0.95);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border: 1px solid var(--glass-border-md);
  color: var(--text-primary);
  padding: 12px 26px;
  border-radius: 99px;
  font-size: 14px;
  font-weight: 600;
  z-index: 2000;
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  animation: toast-in 0.2s ease-out;
}
.toast.success { border-color: rgba(34,197,94,0.4);  color: #4ade80; }
.toast.error   { border-color: rgba(244,63,94,0.4);  color: #fb7185; }
.toast.info    { border-color: rgba(3,199,90,0.4);   color: var(--accent-light); }
.toast.hidden  { display: none; }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ================================
   테이블
================================ */
.table-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th {
  background: rgba(255,255,255,0.04);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--glass-border);
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--text-primary);
  vertical-align: middle;
  font-size: 14px;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: rgba(255,255,255,0.03); }

/* ================================
   프로그레스바
================================ */
.progress-bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 99px;
  transition: width 0.3s ease;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ================================
   태그 (불용어 등)
================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: rgba(3,199,90,0.10);
  border: 1px solid rgba(3,199,90,0.25);
  color: var(--accent-light);
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
}
.tag-remove {
  cursor: pointer;
  color: rgba(52,211,153,0.5);
  font-size: 14px;
  line-height: 1;
  transition: color 0.1s;
}
.tag-remove:hover { color: var(--accent-light); }

/* ================================
   빈 상태
================================ */
.empty-state {
  text-align: center;
  padding: 56px 24px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 52px; margin-bottom: 16px; opacity: 0.6; }
.empty-state .empty-text { font-size: 17px; font-weight: 700; color: var(--text-secondary); }
.empty-state .empty-sub  { font-size: 14px; margin-top: 8px; color: var(--text-muted); }

/* ================================
   섹션 구분선
================================ */
.section-divider {
  height: 1px;
  background: var(--glass-border);
  margin: 20px 0;
}

/* ================================
   배지
================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.badge-accent {
  background: rgba(3,199,90,0.13);
  border: 1px solid rgba(3,199,90,0.3);
  color: var(--accent-light);
}
.badge-success {
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.28);
  color: #4ade80;
}
.badge-warning {
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.28);
  color: #fbbf24;
}

/* ================================
   스크롤바 스타일
================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.22); }

/* ================================
   옵션 칩 (라디오 버튼)
================================ */
.option-chip { cursor: pointer; }
.option-chip span {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  transition: all 0.15s ease;
  user-select: none;
}
.option-chip span:hover {
  background: var(--glass-bg-md);
  color: var(--text-primary);
}

/* ================================
   토글 스위치
================================ */
.toggle-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.toggle-wrap input { display: none; }

.toggle-track {
  width: 42px;
  height: 24px;
  background: rgba(255,255,255,0.1);
  border: 1px solid var(--glass-border);
  border-radius: 99px;
  position: relative;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}
.toggle-wrap input:checked ~ .toggle-track {
  background: rgba(3,199,90,0.3);
  border-color: rgba(3,199,90,0.5);
}
.toggle-wrap input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(18px);
  background: var(--accent-light);
}

/* ================================
   스피너 (로딩)
================================ */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(3,199,90,0.25);
  border-top-color: var(--accent-light);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ================================
   텍스트 줄 제한
================================ */
.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ================================
   체크 아이템 카드
================================ */
.check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  color: var(--text-muted);
  position: relative;
}
.check-item:hover {
  background: var(--glass-bg-md);
  color: var(--text-secondary);
}
.check-item.checked {
  background: rgba(3,199,90,0.08);
  border-color: rgba(3,199,90,0.35);
  color: var(--text-primary);
}

.check-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-left: auto;
  flex-shrink: 0;
  transition: background 0.15s;
}
.check-dot.on  { background: var(--accent-light); box-shadow: 0 0 6px var(--accent-glow); }
.check-dot.off { background: var(--glass-border-md); }

/* ================================
   탭 버튼
================================ */
.tab-btn {
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active {
  background: rgba(3,199,90,0.18);
  color: var(--accent-light);
  box-shadow: 0 0 10px rgba(3,199,90,0.15);
}

/* ================================
   빈도 분석 — 컨트롤 버튼
================================ */
.top-n-btn, .sort-btn {
  padding: 5px 12px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-muted);
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
}
.top-n-btn:hover, .sort-btn:hover {
  background: var(--glass-bg-md);
  color: var(--text-secondary);
}
.top-n-btn.active, .sort-btn.active {
  background: rgba(3,199,90,0.18);
  border-color: rgba(3,199,90,0.45);
  color: var(--accent-light);
  box-shadow: 0 0 8px rgba(3,199,90,0.2);
}

/* ================================
   빈도 분석 — 순위 배지
================================ */
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  background: var(--glass-bg-md);
  color: var(--text-muted);
  padding: 0 6px;
}
.rank-badge.rank-top {
  background: linear-gradient(135deg, rgba(3,199,90,0.28), rgba(2,166,75,0.18));
  border: 1px solid rgba(3,199,90,0.35);
  color: var(--accent-light);
}

/* ================================
   빈도 분석 — 인라인 바
================================ */
.freq-bar-bg {
  height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
  min-width: 40px;
  max-width: 120px;
}
.freq-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 99px;
  transition: width 0.3s ease;
}

/* ================================
   빈도 분석 — 제외 버튼
================================ */
.exclude-btn {
  background: rgba(244,63,94,0.08);
  border: 1px solid rgba(244,63,94,0.2);
  color: #fb7185;
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  transition: all 0.15s;
}
.exclude-btn:hover {
  background: rgba(244,63,94,0.18);
  border-color: rgba(244,63,94,0.4);
}

/* ================================
   막대차트 — 컨트롤
================================ */
.chart-opt-btn {
  padding: 5px 12px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-muted);
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
}
.chart-opt-btn:hover { background: var(--glass-bg-md); color: var(--text-secondary); }
.chart-opt-btn.active {
  background: rgba(3,199,90,0.18);
  border-color: rgba(3,199,90,0.45);
  color: var(--accent-light);
  box-shadow: 0 0 8px rgba(3,199,90,0.2);
}

/* ================================
   슬라이더
================================ */
.chart-slider {
  -webkit-appearance: none;
  appearance: none;
  height: 5px;
  background: rgba(255,255,255,0.08);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}
.chart-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-glow);
  transition: transform 0.1s;
}
.chart-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.chart-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  cursor: pointer;
  border: none;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ================================
   워드클라우드 — 팔레트 버튼
================================ */
.palette-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-muted);
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.15s;
}
.palette-btn:hover { background: var(--glass-bg-md); color: var(--text-secondary); }
.palette-btn.active {
  border-color: rgba(3,199,90,0.45);
  color: var(--text-primary);
  background: rgba(3,199,90,0.10);
}

.palette-dots {
  display: inline-flex;
  gap: 2px;
}
.palette-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

/* ================================
   워드클라우드 — 배경 버튼
================================ */
.bg-btn {
  padding: 5px 12px;
  border-radius: 8px;
  border: 1.5px solid var(--glass-border);
  cursor: pointer;
  font-family: 'Pretendard', sans-serif;
  font-size: 12px;
  font-weight: 700;
  transition: all 0.15s;
  color: #94a3b8;
}
.bg-btn:hover { opacity: 0.85; }
.bg-btn.active { color: white; box-shadow: 0 0 10px rgba(3,199,90,0.3); }

/* ================================
   SNA — 범례
================================ */
.legend-circle {
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.legend-line {
  width: 24px;
  height: 3px;
  background: rgba(148,163,184,0.4);
  border-radius: 99px;
  display: inline-block;
  flex-shrink: 0;
}

/* ================================
   네비게이터 이전/다음 버튼
================================ */
.nav-step-btn {
  flex-shrink: 0;
  padding: 5px 12px;
  border-radius: 10px;
  border: 1.5px solid var(--glass-border);
  background: rgba(255,255,255,0.05);
  color: #94a3b8;
  font-family: 'Pretendard', sans-serif;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.nav-step-btn:hover:not(:disabled) {
  background: rgba(255,255,255,0.12);
  color: #e2e8f0;
}
.nav-step-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}
.nav-step-btn.accent {
  background: rgba(3,199,90,0.18);
  border-color: rgba(3,199,90,0.4);
  color: #6ee7b7;
}
.nav-step-btn.accent:hover:not(:disabled) {
  background: rgba(3,199,90,0.32);
  color: #fff;
}

/* ================================
   FAB — 플로팅 다음 버튼
================================ */
.fab-next {
  position: fixed;
  bottom: 80px;
  right: 24px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #03C75A, #02A64B);
  color: #fff;
  font-family: 'Pretendard', sans-serif;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(3,199,90,0.45);
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.25s, transform 0.25s;
}
.fab-next:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(3,199,90,0.6);
}
.fab-next.hidden { display: none; }
.fab-arrow { font-size: 17px; }

/* ================================
   분석 방식 선택 카드 (Step 2)
================================ */
.mode-card {
  display: block;
  padding: 16px;
  border-radius: 14px;
  border: 1.5px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}
.mode-card:hover {
  background: var(--glass-bg-md);
  border-color: var(--glass-border-md);
}
.mode-card-active {
  background: rgba(3, 199, 90, 0.08);
  border-color: rgba(3, 199, 90, 0.5);
  box-shadow: 0 0 18px rgba(3, 199, 90, 0.13);
}

/* ================================
   반응형
================================ */
@media (max-width: 640px) {
  .step-label { display: none; }
  .step-arrow { font-size: 10px; }
  .modal-box  { padding: 20px; }
  .nav-step-btn { font-size: 12px; padding: 4px 9px; }
  .fab-next { bottom: 72px; right: 16px; padding: 10px 16px; font-size: 14px; }
}