/* ============================================================
   WW-UI.CSS — W-WEBSOFT 공통 UI 컴포넌트 시스템 v1.0
   전체 페이지 공통 적용 (프론트엔드 · 게시판 · 마이페이지 등)
   ============================================================ */

/* ══════════════════════════════════════════════════════
   § 1. 버튼 시스템 — 통일된 pill 버튼
   ══════════════════════════════════════════════════════ */

/* 기본 버튼 리셋 */
.ww-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 22px;
  height: 46px;
  border: 2px solid transparent;
  border-radius: 9999px;
  font-family: inherit;
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: -.01em;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background   .18s cubic-bezier(.4,0,.2,1),
    box-shadow   .18s cubic-bezier(.4,0,.2,1),
    transform    .15s cubic-bezier(.34,1.56,.64,1),
    border-color .18s;
  position: relative;
  overflow: hidden;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.ww-btn:focus-visible {
  outline: 3px solid rgba(16,87,245,.35);
  outline-offset: 3px;
}
.ww-btn:disabled,
.ww-btn[aria-disabled="true"] {
  opacity: .5;
  cursor: not-allowed;
  pointer-events: none;
}
.ww-btn i,
.ww-btn svg { flex-shrink: 0; }

/* 호버 공통 광택 레이어 */
.ww-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.18) 0%, transparent 55%);
  opacity: 0;
  transition: opacity .15s;
  pointer-events: none;
  border-radius: inherit;
}
.ww-btn:hover::after { opacity: 1; }
.ww-btn:active { transform: scale(.97); }

/* Primary — 브랜드 그라디언트 */
.ww-btn,
.ww-btn-primary {
  background: linear-gradient(135deg, #1057f5 0%, #7c3aed 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(16,87,245,.28);
}
.ww-btn:hover,
.ww-btn-primary:hover {
  box-shadow: 0 8px 30px rgba(16,87,245,.42);
  transform: translateY(-2px);
}

/* Secondary — 다크 */
.ww-btn-secondary {
  background: #0a1525;
  color: #fff;
  box-shadow: 0 4px 16px rgba(10,21,37,.2);
}
.ww-btn-secondary:hover {
  background: #1a2a42;
  box-shadow: 0 8px 24px rgba(10,21,37,.3);
  transform: translateY(-2px);
}

/* Outline — 테두리만 */
.ww-btn-outline {
  background: transparent;
  color: #1057f5;
  border-color: #1057f5;
}
.ww-btn-outline:hover {
  background: rgba(16,87,245,.07);
  box-shadow: 0 4px 16px rgba(16,87,245,.15);
  transform: translateY(-2px);
}
.ww-btn-outline::after { display: none; }

/* Ghost — 배경 없음 */
.ww-btn-ghost {
  background: transparent;
  color: var(--ww-text, #0a1525);
  border-color: transparent;
  box-shadow: none;
}
.ww-btn-ghost:hover {
  background: rgba(16,87,245,.07);
  color: #1057f5;
}
.ww-btn-ghost::after { display: none; }

/* White — 흰색 배경 (다크 섹션용) */
.ww-btn-white {
  background: #fff;
  color: #1057f5;
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
}
.ww-btn-white:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,.18);
  transform: translateY(-2px);
}

/* Danger */
.ww-btn-danger {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: #fff;
  box-shadow: 0 4px 16px rgba(220,38,38,.25);
}
.ww-btn-danger:hover {
  box-shadow: 0 8px 24px rgba(220,38,38,.4);
  transform: translateY(-2px);
}

/* 크기 변형 */
.ww-btn-sm { height: 36px; padding: 0 16px; font-size: .8rem; }
.ww-btn-lg { height: 56px; padding: 0 32px; font-size: 1rem; }
.ww-btn-xl { height: 64px; padding: 0 40px; font-size: 1.05rem; }

/* 아이콘 단독 버튼 */
.ww-btn-icon {
  width: 46px; height: 46px; padding: 0;
  border-radius: 50%;
}
.ww-btn-icon.ww-btn-sm { width: 36px; height: 36px; }
.ww-btn-icon.ww-btn-lg { width: 56px; height: 56px; }

/* 로딩 스피너 인라인 */
.ww-btn.is-loading { pointer-events: none; opacity: .8; }
.ww-btn.is-loading::before {
  content: '';
  width: 16px; height: 16px;
  border: 2.5px solid rgba(255,255,255,.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ww-spin .6s linear infinite;
  flex-shrink: 0;
}
@keyframes ww-spin { to { transform: rotate(360deg); } }

/* 다크모드 */
[data-theme="dark"] .ww-btn-ghost { color: rgba(238,243,255,.85); }
[data-theme="dark"] .ww-btn-ghost:hover { background: rgba(16,87,245,.15); color: #7fb3ff; }
[data-theme="dark"] .ww-btn-outline { color: #7fb3ff; border-color: rgba(127,179,255,.5); }
[data-theme="dark"] .ww-btn-outline:hover { background: rgba(16,87,245,.12); }

/* ══════════════════════════════════════════════════════
   § 2. 배지 / 태그 시스템
   ══════════════════════════════════════════════════════ */

.ww-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.ww-badge-primary {
  background: rgba(16,87,245,.12);
  color: #1057f5;
  border: 1px solid rgba(16,87,245,.25);
}
.ww-badge-success {
  background: #ecfdf5;
  color: #059669;
  border: 1px solid rgba(5,150,105,.2);
}
.ww-badge-warning {
  background: #fffbeb;
  color: #d97706;
  border: 1px solid rgba(217,119,6,.2);
}
.ww-badge-danger {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid rgba(220,38,38,.2);
}
.ww-badge-dark {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
}

/* ══════════════════════════════════════════════════════
   § 3. 카드 컴포넌트
   ══════════════════════════════════════════════════════ */

.ww-card {
  background: var(--ww-surface, #fff);
  border: 1px solid rgba(0,0,0,.07);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(10,21,37,.05);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}
.ww-card:hover {
  box-shadow: 0 8px 32px rgba(10,21,37,.1);
  transform: translateY(-2px);
}
.ww-card-body { padding: 24px; }
.ww-card-head {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(0,0,0,.06);
  display: flex; align-items: center; justify-content: space-between;
}
.ww-card-title {
  font-size: 1rem; font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ww-text, #0a1525);
}
.ww-card-foot {
  padding: 14px 24px;
  border-top: 1px solid rgba(0,0,0,.06);
  background: var(--ww-bg-alt, #f8fafc);
}

/* 다크모드 */
[data-theme="dark"] .ww-card {
  background: var(--ww-surface, #141e2e);
  border-color: rgba(255,255,255,.06);
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
}

/* ══════════════════════════════════════════════════════
   § 4. 폼 요소
   ══════════════════════════════════════════════════════ */

.ww-form-group { margin-bottom: 18px; }
.ww-label {
  display: block;
  font-size: .78rem; font-weight: 700;
  color: var(--ww-text-sub, #475569);
  letter-spacing: .04em; text-transform: uppercase;
  margin-bottom: 7px;
}
.ww-label .ww-req { color: #ef4444; margin-left: 3px; }

.ww-input,
.ww-select,
.ww-textarea {
  display: block;
  width: 100%;
  padding: 0 16px;
  height: 48px;
  background: var(--ww-surface, #fff);
  border: 1.5px solid rgba(0,0,0,.12);
  border-radius: 10px;
  font-family: inherit;
  font-size: .9rem;
  color: var(--ww-text, #0a1525);
  outline: none;
  transition: border-color .18s, box-shadow .18s;
  -webkit-appearance: none;
  appearance: none;
}
.ww-textarea { height: auto; padding: 14px 16px; resize: vertical; }
.ww-input::placeholder,
.ww-textarea::placeholder { color: #94a3b8; }
.ww-input:focus,
.ww-select:focus,
.ww-textarea:focus {
  border-color: #1057f5;
  box-shadow: 0 0 0 3px rgba(16,87,245,.15);
}
.ww-input.has-error  { border-color: #ef4444; box-shadow: 0 0 0 3px rgba(239,68,68,.1); }
.ww-input.is-valid   { border-color: #10b981; box-shadow: 0 0 0 3px rgba(16,185,129,.1); }

/* 다크모드 */
[data-theme="dark"] .ww-input,
[data-theme="dark"] .ww-select,
[data-theme="dark"] .ww-textarea {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.12);
  color: #eef3ff;
}
[data-theme="dark"] .ww-input:focus,
[data-theme="dark"] .ww-select:focus,
[data-theme="dark"] .ww-textarea:focus {
  border-color: #5b9bff;
  box-shadow: 0 0 0 3px rgba(91,155,255,.15);
}

/* ══════════════════════════════════════════════════════
   § 5. 아이콘 버튼 (원형)
   ══════════════════════════════════════════════════════ */

.ww-icon-btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--ww-text-sub, #64748b);
  font-size: 1.05rem;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, color .15s, transform .15s;
  flex-shrink: 0;
}
.ww-icon-btn:hover {
  background: rgba(16,87,245,.08);
  color: #1057f5;
  transform: scale(1.08);
}
.ww-icon-btn:active { transform: scale(.95); }

/* ══════════════════════════════════════════════════════
   § 6. 빈 상태 (Empty State)
   ══════════════════════════════════════════════════════ */

.ww-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
}
.ww-empty-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: rgba(16,87,245,.08);
  color: #1057f5;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
}
.ww-empty-title {
  font-size: 1rem; font-weight: 800;
  color: var(--ww-text, #0a1525);
  margin-bottom: 6px;
}
.ww-empty-desc {
  font-size: .85rem;
  color: var(--ww-text-sub, #64748b);
  max-width: 320px;
  line-height: 1.6;
}

/* ══════════════════════════════════════════════════════
   § 7. 알림 토스트 / 플래시 메세지
   ══════════════════════════════════════════════════════ */

.ww-toast {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  border-radius: 12px;
  font-size: .88rem;
  font-weight: 600;
  box-shadow: 0 8px 28px rgba(0,0,0,.15);
  pointer-events: auto;
  animation: ww-toastIn .3s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes ww-toastIn {
  from { opacity:0; transform:translateY(10px) scale(.95); }
  to   { opacity:1; transform:none; }
}
.ww-toast-success { background: #ecfdf5; color: #065f46; border: 1px solid rgba(5,150,105,.25); }
.ww-toast-error   { background: #fef2f2; color: #991b1b; border: 1px solid rgba(220,38,38,.25); }
.ww-toast-info    { background: #eff6ff; color: #1d4ed8; border: 1px solid rgba(37,99,235,.25); }
.ww-toast-warning { background: #fffbeb; color: #92400e; border: 1px solid rgba(217,119,6,.25); }

/* ══════════════════════════════════════════════════════
   § 8. 구분선 (Divider)
   ══════════════════════════════════════════════════════ */

.ww-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #94a3b8;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin: 20px 0;
}
.ww-divider::before,
.ww-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: .25;
}

/* ══════════════════════════════════════════════════════
   § 9. 스켈레톤 로딩
   ══════════════════════════════════════════════════════ */

.ww-skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: ww-shimmer 1.5s infinite;
  border-radius: 6px;
}
@keyframes ww-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
[data-theme="dark"] .ww-skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,.07) 25%, rgba(255,255,255,.12) 50%, rgba(255,255,255,.07) 75%);
  background-size: 200% 100%;
}

/* ══════════════════════════════════════════════════════
   § 10. 유틸리티 클래스
   ══════════════════════════════════════════════════════ */

.ww-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;
}
.ww-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ww-break-word { word-break: break-word; overflow-wrap: break-word; }
.ww-no-select { user-select: none; -webkit-user-select: none; }

/* 스크롤바 커스터마이징 */
.ww-scroll::-webkit-scrollbar { width: 5px; height: 5px; }
.ww-scroll::-webkit-scrollbar-track { background: transparent; }
.ww-scroll::-webkit-scrollbar-thumb { background: rgba(0,0,0,.18); border-radius: 3px; }
.ww-scroll::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,.28); }

/* 반응형 그리드 유틸 */
.ww-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.ww-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ww-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 860px) {
  .ww-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .ww-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .ww-grid-2,
  .ww-grid-3,
  .ww-grid-4 { grid-template-columns: 1fr; }
}

/* 모션 감소 지원 */
@media (prefers-reduced-motion: reduce) {
  .ww-btn,
  .ww-card,
  .ww-icon-btn {
    transition: none !important;
    animation: none !important;
  }
  .ww-btn:hover,
  .ww-card:hover { transform: none !important; }
}