@charset "UTF-8";

:root {
  --c-primary: #ec4899;       /* Pink 500 */
  --c-primary-hover: #db2777;
  --c-bg: #fdf2f8;            /* Pink 50 */
  --c-card-bg: #ffffff;
  --c-text-main: #1f2937;
  --c-text-sub: #6b7280;
  --c-border: #e5e7eb;
  --c-input-bg: #ffffff;
  --c-accent-bg: #fce7f3;
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --radius-md: 12px;
  --radius-lg: 24px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-primary: #f472b6;
    --c-primary-hover: #f472b6;
    --c-bg: #0f172a;
    --c-card-bg: #1e293b;
    --c-text-main: #f1f5f9;
    --c-text-sub: #94a3b8;
    --c-border: #334155;
    --c-input-bg: #0f172a;
    --c-accent-bg: #334155;
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  }
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  background-color: var(--c-bg);
  color: var(--c-text-main);
  margin: 0;
  padding: 20px;
  line-height: 1.6;
}

.tool-wrapper {
  max-width: 1040px;
  margin: 0 auto;
  background: var(--c-card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 40px;
  box-sizing: border-box;
  transition: background-color 0.3s;
}

/* Header */
.tool-header {
  margin-bottom: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}
.app-title { font-size: 2.2rem; font-weight: 900; margin: 0; letter-spacing: -0.03em; }
.app-title .accent { color: var(--c-primary); }
.app-desc { margin: 5px 0 0; color: var(--c-text-sub); font-size: 0.9rem; }

.badge-security {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-accent-bg);
  color: var(--c-primary-hover);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 99px;
  border: 1px solid rgba(236, 72, 153, 0.15);
}

/* Layout */
.two-column-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  align-items: start;
}

/* Config Panel */
.config-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.group-label {
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--c-text-sub);
}
.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.char-count {
  font-size: 0.75rem;
  font-weight: bold;
  color: var(--c-text-sub);
}
.char-count.limit-over {
  color: #ef4444;
}

input.input-text, textarea.input-text {
  width: 100%;
  padding: 12px;
  border: 2.2px solid var(--c-border);
  border-radius: 10px;
  background: var(--c-input-bg);
  color: var(--c-text-main);
  outline: 0;
  font-size: 1rem;
  font-family: inherit;
  box-sizing: border-box;
  transition: border-color 0.2s, background-color 0.2s;
}
input.input-text:focus,
textarea.input-text:focus {
  border-color: var(--c-primary);
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed var(--c-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  background: var(--c-input-bg);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  outline: 0;
}
.file-upload-area:hover,
.file-upload-area:focus {
  border-color: var(--c-primary);
  background: var(--c-bg);
}
.file-input { display: none; }
.icon-upload { font-size: 1.8rem; display: block; margin-bottom: 6px; }
.upload-placeholder p { margin: 0; font-size: 0.85rem; font-weight: bold; color: var(--c-text-sub); }

.image-preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100px;
  position: relative;
}
.image-preview-container img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 6px;
  object-fit: contain;
}
.btn-icon-remove {
  position: absolute;
  top: -8px;
  right: -8px;
  background: #ef4444;
  color: #fff;
  border: none;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* Ratio Warning */
.warning-msg {
  background: #fef2f2;
  border: 1px solid #fee2e2;
  color: #ef4444;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-weight: bold;
  animation: fadeInDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.actions {
  display: flex;
  justify-content: flex-end;
}
.btn-text {
  background: transparent;
  border: none;
  color: var(--c-text-sub);
  font-size: 0.85rem;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.2s;
  padding: 8px 12px;
}
.btn-text:hover {
  color: #ef4444;
}

/* Preview Panel */
.preview-panel {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: var(--c-card-bg);
}
.preview-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  gap: 15px;
  flex-wrap: wrap;
}
.preview-tabs {
  display: flex;
  background: var(--c-border);
  padding: 3px;
  border-radius: 8px;
  gap: 2px;
}
.tab-btn {
  background: transparent;
  border: none;
  font-size: 0.8rem;
  font-weight: bold;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--c-text-sub);
  transition: all 0.2s;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--c-text-main); }
.tab-btn.active {
  background: var(--c-card-bg);
  color: var(--c-primary-hover);
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

/* Theme Toggle Switch */
.toggle-switch-theme {
  position: relative;
  display: inline-block;
  width: 54px;
  height: 44px;
  cursor: pointer;
}
.toggle-switch-theme input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--c-border);
  transition: .4s;
  border-radius: 34px;
}
.slider:before {
  position: absolute;
  content: "";
  height: 22px; width: 22px;
  left: 3px; bottom: 3px;
  background-color: #fff;
  transition: .4s;
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
input:checked + .slider { background-color: var(--c-primary); }
input:checked + .slider:before { transform: translateX(26px); }

.theme-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  z-index: 1;
  pointer-events: none;
  transition: opacity 0.2s;
}
.icon-sun { left: 8px; }
.icon-moon { right: 8px; opacity: 0.5; }
input:checked ~ .icon-sun { opacity: 0.5; }
input:checked ~ .icon-moon { opacity: 1; }

/* Preview Canvas */
.preview-canvas {
  background: #f1f5f9;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s;
}
.preview-canvas.theme-dark {
  background: #0f1419; /* Xのダークブルー調 */
}

/* SNS Mockups Core CSS */
.card-view {
  display: none;
  width: 100%;
  max-width: 520px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.card-view.active { display: block; }

/* 1. X (Twitter) Feed Mock Styling */
.preview-canvas.theme-light .twitter-large,
.preview-canvas.theme-light .twitter-summary {
  background: #ffffff;
  border: 1px solid #e1e8ed;
  color: #0f1419;
}
.preview-canvas.theme-dark .twitter-large,
.preview-canvas.theme-dark .twitter-summary {
  background: #000000;
  border: 1px solid #2f3336;
  color: #e7e9ea;
}

.sns-user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px 4px;
}
.sns-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ec4899, #fbbf24);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
}
.sns-user-info { display: flex; flex-direction: column; }
.sns-display-name { font-weight: bold; font-size: 0.95rem; }
.sns-username { 
  font-size: 0.8rem; 
  color: #536471; 
}
.preview-canvas.theme-dark .sns-username { color: #71767b; }

.sns-post-text {
  padding: 4px 16px 10px;
  font-size: 0.95rem;
  line-height: 1.4;
}

/* X card block inside feed */
.sns-card-container {
  margin: 0 16px 8px;
  border: 1px solid #e1e8ed;
  border-radius: 16px;
  overflow: hidden;
  transition: background-color 0.2s;
}
.preview-canvas.theme-dark .sns-card-container {
  border-color: #2f3336;
}
.sns-card-container:hover {
  background-color: rgba(0,0,0,0.02);
}
.preview-canvas.theme-dark .sns-card-container:hover {
  background-color: rgba(255,255,255,0.03);
}

.card-image-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #e1e8ed;
}
.preview-canvas.theme-dark .card-image-wrapper {
  background: #202327;
}

.aspect-191-100 { aspect-ratio: 1.91 / 1; }
.aspect-1-1 { aspect-ratio: 1 / 1; }

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

/* OGP Text Area in Mock */
.card-meta {
  padding: 10px 12px;
  font-size: 0.9rem;
  line-height: 1.3;
}
.meta-domain {
  font-size: 0.8rem;
  color: #536471;
  text-transform: lowercase;
  display: block;
  margin-bottom: 2px;
}
.preview-canvas.theme-dark .meta-domain { color: #71767b; }

.meta-title {
  font-weight: bold;
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.meta-desc {
  font-size: 0.82rem;
  color: #536471;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.preview-canvas.theme-dark .meta-desc { color: #71767b; }

/* X Action Buttons */
.sns-actions-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 36px 10px 64px;
  font-size: 0.75rem;
  color: #536471;
  border-top: 1px solid rgba(0,0,0,0.03);
}
.preview-canvas.theme-dark .sns-actions-row {
  color: #71767b;
  border-top-color: rgba(255,255,255,0.03);
}

/* X Small Card structure override */
.twitter-summary .card-content-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  border: 1px solid #e1e8ed;
  border-radius: 16px;
}
.preview-canvas.theme-dark .twitter-summary .card-content-row {
  border-color: #2f3336;
}
.twitter-summary .card-image-wrapper {
  border-right: 1px solid #e1e8ed;
}
.preview-canvas.theme-dark .twitter-summary .card-image-wrapper {
  border-right-color: #2f3336;
}
.twitter-summary .card-meta {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* 2. Facebook Feed Mock Styling */
.facebook {
  background: #ffffff;
  border: 1px solid #dddfe2;
  color: #1c1e21;
}
.preview-canvas.theme-dark .facebook {
  background: #242526;
  border: 1px solid #3e4042;
  color: #e4e6eb;
}

.fb-user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
}
.fb-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1877f2, #55eefc);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.fb-user-info { display: flex; flex-direction: column; }
.fb-display-name { font-weight: bold; font-size: 0.95rem; color: #050505; }
.preview-canvas.theme-dark .fb-display-name { color: #e4e6eb; }
.fb-time { font-size: 0.75rem; color: #65676b; }
.preview-canvas.theme-dark .fb-time { color: #b0b3b8; }

.fb-post-text {
  padding: 0 16px 12px;
  font-size: 0.93rem;
  line-height: 1.4;
}
.fb-card-container {
  border-top: 1px solid #ebd0d0;
  border-bottom: 1px solid #ebd0d0;
  background: #f2f3f5;
}
.preview-canvas.theme-dark .fb-card-container {
  border-color: #3e4042;
  background: #242526;
}
.facebook .card-meta {
  background: #f2f3f5;
  border-top: 1px solid #dddfe2;
}
.preview-canvas.theme-dark .facebook .card-meta {
  background: #242526;
  border-top-color: #3e4042;
}
.facebook .meta-domain {
  text-transform: uppercase;
  font-size: 0.75rem;
}
.fb-actions-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
  padding: 10px 0;
  font-size: 0.85rem;
  font-weight: bold;
  color: #65676b;
  border-top: 1px solid #e5e5e5;
}
.preview-canvas.theme-dark .fb-actions-row {
  color: #b0b3b8;
  border-top-color: #3e4042;
}

/* 3. LINE Feed Mock Styling */
.line {
  background: #7497cd; /* LINEおなじみの水色チャット背景 */
  box-shadow: none;
  padding: 20px 10px;
}
.preview-canvas.theme-dark .line {
  background: #1e1e1e;
}

.line-chat-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.line-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: #06c755; /* LINEグリーン */
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem;
}
.line-bubble-wrapper {
  display: flex;
  flex-direction: column;
  max-width: 75%;
}
.line-user-name {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 4px;
}
.preview-canvas.theme-dark .line-user-name {
  color: #a0a0a0;
}
.line-bubble {
  background: #ffffff;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  color: #111111;
}
.preview-canvas.theme-dark .line-bubble {
  background: #303030;
  color: #f5f5f5;
}
.line .card-meta {
  padding: 8px 12px;
}
.line .meta-domain {
  text-align: right;
  margin-top: 4px;
}
.line-time {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.7);
  align-self: flex-end;
  margin-bottom: 2px;
}
.preview-canvas.theme-dark .line-time {
  color: #707070;
}

/* VISUAL CROP / TRIM MASK SYSTEM */
.trim-mask {
  position: absolute;
  background-image: repeating-linear-gradient(45deg, 
                    rgba(239, 68, 68, 0.15), 
                    rgba(239, 68, 68, 0.15) 6px, 
                    rgba(239, 68, 68, 0.25) 6px, 
                    rgba(239, 68, 68, 0.25) 12px);
  border: 1px dashed rgba(239, 68, 68, 0.5);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  z-index: 5;
  box-sizing: border-box;
}

/* 4方向のマスク配置 */
.mask-top {
  top: 0; left: 0; right: 0;
  height: var(--mask-top, 0%);
  border-bottom: 2px solid #ef4444;
}
.mask-bottom {
  bottom: 0; left: 0; right: 0;
  height: var(--mask-bottom, 0%);
  border-top: 2px solid #ef4444;
}
.mask-left {
  top: 0; bottom: 0; left: 0;
  width: var(--mask-left, 0%);
  border-right: 2px solid #ef4444;
}
.mask-right {
  top: 0; bottom: 0; right: 0;
  width: var(--mask-right, 0%);
  border-left: 2px solid #ef4444;
}

/* Sister Tool Banner Card Styling */
.sister-banner-card {
  margin: 40px 0 20px;
  background: linear-gradient(135deg, #fce7f3 0%, #fffbeb 100%);
  border: 1px solid rgba(236, 72, 153, 0.25);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 10px 20px -5px rgba(236, 72, 153, 0.08);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

@media (prefers-color-scheme: dark) {
  .sister-banner-card {
    background: linear-gradient(135deg, #371a2d 0%, #1e1b4b 100%);
    border-color: rgba(244, 114, 182, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  }
}

.sister-banner-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -5px rgba(236, 72, 153, 0.15);
}

.banner-badge {
  display: inline-block;
  background: var(--c-primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 99px;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.banner-title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  font-weight: bold;
}
.banner-text {
  margin: 0 0 18px;
  font-size: 0.88rem;
  color: var(--c-text);
  line-height: 1.5;
}
.btn-banner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-primary);
  color: #fff;
  font-weight: bold;
  font-size: 0.88rem;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 8px;
  transition: all 0.2s;
  box-shadow: 0 4px 10px rgba(236, 72, 153, 0.25);
}
.btn-banner:hover {
  background: var(--c-primary-hover);
  transform: scale(1.02);
  box-shadow: 0 6px 15px rgba(236, 72, 153, 0.35);
}

/* Article & Base Layouts */
.article-content { margin-top: 50px; border-top: 1px solid var(--c-border); padding-top: 30px; }
.feature-box { background: var(--c-accent-bg); padding: 20px; border-radius: 8px; border-left: 4px solid var(--c-primary); margin: 20px 0; }

.table-wrapper { overflow-x: auto; margin: 20px 0; }
.size-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.size-table th, .size-table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--c-border);
}
.size-table th {
  background: var(--c-accent-bg);
  color: var(--c-text-main);
  font-weight: bold;
}

.faq-section {
  margin-top: 30px;
  padding: 24px;
  background: var(--c-accent-bg);
  border-radius: var(--radius-md);
}
.faq-list { margin: 0; }
.faq-item + .faq-item { margin-top: 20px; }
.faq-item dt { font-weight: bold; margin-bottom: 6px; }
.faq-item dd { margin: 0; color: var(--c-text); }

.tool-footer {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid var(--c-border);
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.85rem;
}
.tool-footer a { color: var(--c-text-sub); text-decoration: none; transition: color 0.2s; }
.tool-footer a:hover { color: var(--c-primary); }

.preview-note {
  margin-top: 15px;
  font-size: 0.75rem;
  color: var(--c-text-sub);
  text-align: center;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile Responsive */
@media (max-width: 900px) {
  .two-column-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .sticky-container {
    position: static;
  }
}
@media (max-width: 640px) {
  .tool-wrapper { padding: 20px 12px; }
  .preview-canvas { padding: 20px 10px; min-height: auto; }
  .app-title { font-size: 1.8rem; }
  .badge-security { width: 100%; justify-content: center; margin-top: 10px; }
  .sns-actions-row { padding-left: 20px; padding-right: 20px; }
}