/* ============================================
   XP Image Tools - Common CSS
   공통 레이아웃, 배경, 작업 표시줄, 시작 메뉴
   ============================================ */

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'Tahoma', 'Microsoft Sans Serif', Arial, sans-serif;
  font-size: 11px;
}

/* ── XP 배경화면 ── */
body {
  background-color: #3A6EA5;
  background-image:
    radial-gradient(ellipse 120% 80% at 50% 110%, #1A6030 0%, transparent 60%),
    radial-gradient(ellipse 80% 60% at 20% 100%, #1E7A3A 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 100%, #158228 0%, transparent 45%),
    linear-gradient(180deg,
      #5B8FC9 0%,
      #6498D4 15%,
      #4A8FC4 30%,
      #3E90C0 45%,
      #48A0C0 55%,
      #3AA080 65%,
      #2E9060 75%,
      #2A7840 85%,
      #1E6030 100%
    );
  background-attachment: fixed;
  position: relative;
}

/* 구름 효과 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 400px 120px at 25% 20%, rgba(255,255,255,0.35) 0%, transparent 70%),
    radial-gradient(ellipse 300px 100px at 70% 15%, rgba(255,255,255,0.28) 0%, transparent 70%),
    radial-gradient(ellipse 200px 80px at 55% 28%, rgba(255,255,255,0.20) 0%, transparent 70%),
    radial-gradient(ellipse 350px 90px at 10% 35%, rgba(255,255,255,0.18) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

/* ── 데스크탑 영역 ── */
#desktop {
  position: fixed;
  inset: 0 0 40px 0;
  overflow: hidden;
  z-index: 1;
}

/* ── 광고 영역 (AdSense placeholder) ── */
.ad-placeholder {
  display: none; /* 광고 코드 삽입 시 block으로 변경 */
  background: rgba(255,255,255,0.1);
  border: 1px dashed rgba(255,255,255,0.3);
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 10px;
  padding: 4px;
}

.ad-top    { position: fixed; top: 0; left: 0; right: 0; height: 90px; z-index: 10; }
.ad-bottom { position: fixed; bottom: 40px; left: 0; right: 0; height: 90px; z-index: 10; }
.ad-side   { position: fixed; right: 0; top: 90px; bottom: 130px; width: 120px; z-index: 10; }

/* ── 작업 표시줄 ── */
#taskbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(180deg,
    #245EDC 0%,
    #2466E0 8%,
    #1C58D4 15%,
    #1A52CC 30%,
    #1648B8 50%,
    #1240A8 75%,
    #0E3898 100%
  );
  border-top: 1px solid #1B78F5;
  display: flex;
  align-items: center;
  z-index: 1000;
  box-shadow: 0 -2px 4px rgba(0,0,0,0.4);
}

/* ── 시작 버튼 ── */
#start-btn {
  height: 36px;
  margin: 2px 4px;
  padding: 0 14px 0 8px;
  background: linear-gradient(180deg,
    #5CC040 0%,
    #3AA828 30%,
    #288010 60%,
    #1E6808 100%
  );
  border: 1px solid #0C5008;
  border-radius: 0 14px 14px 0;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 14px;
  font-weight: bold;
  font-style: italic;
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.6);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.3),
    inset -1px 0 0 rgba(0,0,0,0.2),
    0 0 8px rgba(80,200,50,0.4);
  flex-shrink: 0;
  transition: filter 0.1s;
  outline: none;
}

#start-btn:hover {
  background: linear-gradient(180deg,
    #70D050 0%,
    #50C038 30%,
    #389020 60%,
    #2A7810 100%
  );
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.4),
    0 0 12px rgba(100,220,70,0.5);
}

#start-btn:active, #start-btn.active {
  background: linear-gradient(180deg,
    #288010 0%,
    #3AA828 50%,
    #5CC040 100%
  );
}

.start-btn-logo {
  width: 22px;
  height: 22px;
  display: flex;
  flex-shrink: 0;
}

/* ── 작업 표시줄 - 시계/트레이 ── */
#taskbar-tray {
  margin-left: auto;
  display: flex;
  align-items: center;
  padding: 0 8px;
  height: 100%;
  border-left: 1px solid rgba(255,255,255,0.15);
  gap: 8px;
  flex-shrink: 0;
}

#taskbar-clock {
  color: white;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  white-space: nowrap;
  cursor: default;
  line-height: 1.4;
  min-width: 60px;
}

/* ── 작업 표시줄 - 열린 창 목록 ── */
#taskbar-windows {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  padding: 0 6px;
  overflow: hidden;
}

.taskbar-window-btn {
  height: 28px;
  max-width: 160px;
  min-width: 80px;
  padding: 0 8px;
  background: linear-gradient(180deg,
    rgba(255,255,255,0.15) 0%,
    rgba(255,255,255,0.05) 100%
  );
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 3px;
  color: white;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  text-shadow: 0 1px 1px rgba(0,0,0,0.5);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
}

.taskbar-window-btn:hover {
  background: linear-gradient(180deg,
    rgba(255,255,255,0.25) 0%,
    rgba(255,255,255,0.12) 100%
  );
}

.taskbar-window-btn.active {
  background: linear-gradient(180deg,
    rgba(0,0,0,0.2) 0%,
    rgba(255,255,255,0.1) 100%
  );
  box-shadow:
    inset 1px 1px 2px rgba(0,0,0,0.3),
    0 1px 0 rgba(255,255,255,0.1);
}

/* ── 시작 메뉴 ── */
#start-menu {
  position: fixed;
  bottom: 40px;
  left: 0;
  width: 380px;
  background: white;
  border: 2px solid #1A46A8;
  border-radius: 8px 8px 0 0;
  box-shadow: 4px -4px 16px rgba(0,0,0,0.5);
  z-index: 2000;
  display: none;
  overflow: hidden;
  font-family: 'Tahoma', Arial, sans-serif;
}

#start-menu.visible { display: block; }

/* 시작 메뉴 - 사용자 헤더 */
.start-menu-header {
  background: linear-gradient(90deg, #1A52C8 0%, #3A80F0 100%);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
}

.start-menu-user-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #8CC0F0 0%, #4888D8 100%);
  border: 2px solid white;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.start-menu-username {
  color: white;
  font-weight: bold;
  font-size: 13px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

/* 시작 메뉴 본문 */
.start-menu-body {
  display: flex;
  height: calc(100% - 54px - 38px);
  min-height: 300px;
}

.start-menu-left {
  flex: 1;
  background: white;
  border-right: 1px solid #C0C0C0;
  padding: 4px 0;
  min-width: 0;
}

.start-menu-right {
  width: 160px;
  background: #E8F0F8;
  padding: 4px 0;
  flex-shrink: 0;
}

/* 시작 메뉴 구분선 */
.start-menu-sep {
  height: 1px;
  background: linear-gradient(90deg, transparent, #C0C0C0 20%, #C0C0C0 80%, transparent);
  margin: 4px 8px;
}

/* 시작 메뉴 아이템 */
.start-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  cursor: pointer;
  color: #000;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  position: relative;
}

.start-menu-item:hover {
  background: var(--xp-highlight, #316AC5);
  color: white;
}

.start-menu-item .menu-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.start-menu-item.small .menu-icon {
  width: 16px;
  height: 16px;
  font-size: 14px;
}

.start-menu-item .menu-label { font-weight: bold; font-size: 11px; }
.start-menu-item .menu-desc  { font-size: 10px; color: #666; margin-top: 1px; }
.start-menu-item:hover .menu-desc { color: rgba(255,255,255,0.8); }

.start-menu-item .menu-text { flex: 1; min-width: 0; overflow: hidden; }

/* 시작 메뉴 - 우측 섹션 제목 */
.start-menu-section-title {
  font-size: 10px;
  color: #1A52C8;
  font-weight: bold;
  padding: 8px 12px 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* 시작 메뉴 - 하단 버튼 */
.start-menu-footer {
  background: linear-gradient(90deg, #1A52C8 0%, #3A80F0 100%);
  padding: 4px 8px;
  display: flex;
  justify-content: flex-end;
  gap: 4px;
  min-height: 38px;
  align-items: center;
}

.start-menu-footer-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 3px;
  color: white;
  padding: 3px 12px;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.start-menu-footer-btn:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.8);
}

/* ── 데스크탑 아이콘 ── */
.desktop-icon {
  position: absolute;
  width: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  cursor: pointer;
  border-radius: 4px;
  user-select: none;
}

.desktop-icon:hover {
  background: rgba(49,106,197,0.3);
}

.desktop-icon .icon-img {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
}

.desktop-icon .icon-label {
  color: white;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  text-align: center;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
  word-break: break-word;
  line-height: 1.3;
  max-width: 68px;
}

.desktop-icon .icon-label span {
  background: transparent;
}

.desktop-icon:focus .icon-label span,
.desktop-icon.selected .icon-label span {
  background: rgba(49,106,197,0.8);
  color: white;
  outline: 1px dotted white;
}

/* ── 메인 창 컨테이너 ── */
#main-window {
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  max-width: calc(100vw - 20px);
  min-width: 320px;
  z-index: 100;
}

/* ── 콘텐츠 영역 ── */
.xp-window-content {
  padding: 10px;
  background: var(--xp-silver, #ECE9D8);
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

/* ── 드래그 가능한 창 ── */
.draggable-window {
  position: absolute;
  z-index: 100;
  min-width: 320px;
}

.draggable-window .xp-titlebar {
  cursor: move;
}

/* ── 업로드 드롭존 ── */
.xp-dropzone {
  border: 2px dashed var(--xp-border-dark, #808080);
  background: white;
  padding: 30px 20px;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.xp-dropzone:hover,
.xp-dropzone.dragover {
  background: #EEF4FF;
  border-color: var(--xp-highlight, #316AC5);
}

.xp-dropzone-icon { font-size: 40px; }
.xp-dropzone-text { font-family: 'Tahoma', Arial, sans-serif; font-size: 12px; color: #333; }
.xp-dropzone-sub  { font-family: 'Tahoma', Arial, sans-serif; font-size: 10px; color: #666; }

/* ── 이미지 미리보기 ── */
.preview-container {
  background: #808080;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 160px;
  border: 2px inset var(--xp-border-dark, #808080);
  position: relative;
}

.preview-container img {
  max-width: 100%;
  max-height: 100%;
  display: block;
  object-fit: contain;
}

.preview-placeholder {
  color: #C0C0C0;
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 12px;
  text-align: center;
  padding: 20px;
}

/* ── 폼 레이아웃 ── */
.xp-form-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.xp-form-label {
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  color: #000;
  min-width: 80px;
  flex-shrink: 0;
}

.xp-form-value {
  font-family: 'Tahoma', Arial, sans-serif;
  font-size: 11px;
  color: #333;
  font-weight: bold;
}

/* ── 알림 / 메시지 박스 ── */
.xp-msgbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 5000;
  display: none;
}

.xp-msgbox-overlay.visible { display: flex; align-items: center; justify-content: center; }

.xp-msgbox {
  background: var(--xp-silver, #ECE9D8);
  border: 2px solid #1A46A8;
  border-radius: 6px 6px 4px 4px;
  min-width: 260px;
  max-width: 400px;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.5);
}

.xp-msgbox-body {
  padding: 16px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.xp-msgbox-icon { font-size: 32px; flex-shrink: 0; }
.xp-msgbox-text { font-family: 'Tahoma', Arial, sans-serif; font-size: 11px; line-height: 1.5; }
.xp-msgbox-footer {
  padding: 8px 16px;
  text-align: center;
  border-top: 1px solid var(--xp-silver-dark, #D4D0C8);
  display: flex;
  justify-content: center;
  gap: 8px;
}

/* ── 반응형 ── */
@media (max-width: 800px) {
  #main-window {
    top: 10px;
    width: calc(100vw - 10px);
    left: 5px;
    transform: none;
  }
  #start-menu { width: min(380px, 100vw); }
  .start-menu-right { display: none; }
  .xp-window-content { max-height: calc(100vh - 120px); }
}

@media (max-width: 480px) {
  #taskbar { height: 36px; }
  #start-btn { height: 32px; font-size: 12px; }
  #desktop { bottom: 36px; }
  #start-menu { bottom: 36px; }
  .ad-bottom { bottom: 36px; }
}

/* ── 접근성 ── */
*:focus-visible {
  outline: 2px solid #000080;
  outline-offset: 1px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}