/* ====================================================
   MukuDrive Premium UI Design System
   ==================================================== */

:root {
  /* Colors */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(241, 245, 249, 0.9);
  
  --border-color: rgba(15, 23, 42, 0.08);
  --border-color-active: rgba(31, 41, 55, 0.4);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --color-primary: #1e293b;
  --color-primary-light: rgba(30, 41, 59, 0.08);
  --color-primary-hover: #0f172a;
  --color-accent: #059669;
  --color-accent-light: rgba(5, 150, 105, 0.08);
  --color-danger: #e11d48;
  --color-danger-light: rgba(225, 29, 72, 0.08);
  
  /* Layout & Shadows */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-lg: 0 10px 30px -10px rgba(15, 23, 42, 0.1);
  --shadow-glass: 0 8px 32px 0 rgba(15, 23, 42, 0.04);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(at 0% 0%, rgba(30, 41, 59, 0.02) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(5, 150, 105, 0.01) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Layout Utilities */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hidden {
  display: none !important;
}

/* Glassmorphism Card Base */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  transition: var(--transition-smooth);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-smooth);
  color: var(--text-primary);
  outline: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px 0 rgba(30, 41, 59, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(30, 41, 59, 0.3);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: rgba(15, 23, 42, 0.05);
  border-color: rgba(15, 23, 42, 0.15);
}

.btn-danger {
  background-color: var(--color-danger);
  color: #ffffff;
  box-shadow: 0 4px 14px 0 rgba(225, 29, 72, 0.2);
}

.btn-danger:hover {
  background-color: #be123c;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px 0 rgba(225, 29, 72, 0.3);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: 8px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-secondary);
}

.btn-icon:hover {
  background: rgba(15, 23, 42, 0.05);
  color: var(--text-primary);
}

/* Inputs */
.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  font-family: inherit;
  font-size: 0.95rem;
  background-color: rgba(15, 23, 42, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: var(--transition-smooth);
  outline: none;
}

.input-wrapper input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 41, 59, 0.15);
  background-color: #ffffff;
}

.input-icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

/* Animations */
.fade-in {
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Login Card specific styles */
.login-card {
  width: 100%;
  max-width: 420px;
  padding: 40px;
  margin: 20px;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.logo svg {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.error-text {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-bottom: 16px;
  padding: 10px 12px;
  background-color: var(--color-danger-light);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-danger);
}

/* ====================================================
   Main Storage Interface Layout
   ==================================================== */

.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px;
  flex-shrink: 0;
  z-index: 10;
}

.sidebar .logo {
  margin-bottom: 32px;
}

.sidebar .logo svg {
  width: 30px;
  height: 30px;
}

.sidebar .logo span {
  font-size: 1.4rem;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-menu li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.sidebar-menu li a svg {
  width: 20px;
  height: 20px;
}

.sidebar-menu li.active a, .sidebar-menu li a:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-menu li.active a {
  box-shadow: inset 3px 0 0 var(--color-primary);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.user-profile {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-weight: bold;
}

.user-details span {
  display: block;
  font-size: 0.85rem;
}

.user-details .role {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* Main Content Area */
.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--bg-primary);
  position: relative;
}

/* Header */
.top-bar {
  height: 70px;
  border-bottom: 1px solid var(--border-color);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  z-index: 5;
}

.search-bar {
  width: 360px;
}

.search-bar .input-wrapper input {
  padding: 10px 16px 10px 42px;
  font-size: 0.9rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* File Actions / Command Bar */
.actions-bar {
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: nowrap;
}

.breadcrumb-item {
  cursor: pointer;
  transition: var(--transition-fast);
}

.breadcrumb-item:hover {
  color: var(--text-primary);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 600;
  cursor: default;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.view-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  background: rgba(15, 23, 42, 0.04);
}

.view-controls button {
  padding: 6px;
  border-radius: 8px;
}

.view-controls button.active {
  background-color: #ffffff;
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* File Browser Container */
.file-browser {
  flex-grow: 1;
  overflow-y: auto;
  padding: 0 32px 32px 32px;
  position: relative;
}

/* Grid View styling */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.file-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 20px 16px 16px 16px;
  height: 180px;
  cursor: pointer;
  user-select: none;
}

.file-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-active);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.file-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  border-radius: var(--radius-md);
  background-color: rgba(15, 23, 42, 0.03);
  margin-bottom: 12px;
  transition: var(--transition-smooth);
}

.file-card:hover .file-icon-wrapper {
  background-color: rgba(15, 23, 42, 0.06);
}

.file-icon {
  width: 42px;
  height: 42px;
}

.file-info {
  text-align: center;
  width: 100%;
  overflow: hidden;
}

.file-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  margin-bottom: 2px;
}

.file-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.file-card-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  opacity: 0;
  transition: var(--transition-fast);
}

.file-card:hover .file-card-actions, .file-card-actions.active {
  opacity: 1;
}

/* List View styling */
.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.list-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 80px;
  padding: 10px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.file-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 80px;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.file-row:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-color-active);
}

.file-row-name {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-row-name svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.file-row-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.file-row-actions {
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  transition: var(--transition-fast);
}

.file-row:hover .file-row-actions, .file-row-actions.active {
  opacity: 1;
}

/* File Icon Colors */
.icon-folder { color: #f59e0b; }
.icon-image { color: #3b82f6; }
.icon-video { color: #8b5cf6; }
.icon-audio { color: #ec4899; }
.icon-pdf { color: #ef4444; }
.icon-text { color: #10b981; }
.icon-default { color: #6b7280; }

/* Drag and Drop Overlay */
.drop-zone-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
  border: 3px dashed var(--color-primary);
  margin: 0;
  border-radius: var(--radius-lg);
}

.drop-zone-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drop-zone-content {
  text-align: center;
  animation: pulse-glow 2s infinite alternate ease-in-out;
}

.drop-zone-content svg {
  width: 80px;
  height: 80px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.drop-zone-content h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.drop-zone-content p {
  color: var(--text-secondary);
}

@keyframes pulse-glow {
  0% { transform: scale(1); }
  100% { transform: scale(1.05); }
}

/* Uploading Progress Toast */
.upload-progress-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 360px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.upload-toast {
  padding: 16px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.upload-toast-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
}

.upload-toast-title {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.upload-toast-title svg {
  width: 16px;
  height: 16px;
  animation: spin 1.5s linear infinite;
}

.upload-progress-bar-bg {
  width: 100%;
  height: 6px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
}

.upload-progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--color-primary);
  border-radius: 3px;
  transition: width 0.2s ease;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Context Menu / Dropdown Menu */
.context-menu {
  position: absolute;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px 0;
  z-index: 500;
  width: 180px;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.context-menu-item:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.context-menu-item svg {
  width: 16px;
  height: 16px;
}

.context-menu-separator {
  height: 1px;
  background-color: var(--border-color);
  margin: 6px 0;
}

/* ====================================================
   Modals & Popups
   ==================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-wrapper {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -45%);
  z-index: 2001;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
  width: 90%;
  max-width: 500px;
}

.modal-wrapper.active {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%);
}

.modal-card {
  padding: 24px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-body {
  margin-bottom: 24px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* Preview Modal Specifics */
.modal-wrapper.preview-modal {
  max-width: 900px;
  width: 95%;
  height: 85vh;
}

.modal-wrapper.preview-modal .modal-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.preview-modal .modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0;
}

.preview-modal .modal-body {
  flex-grow: 1;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-bottom: 0;
  overflow: auto;
}

.preview-content {
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-content img {
  max-width: 100%;
  max-height: calc(85vh - 70px);
  object-fit: contain;
  box-shadow: var(--shadow-lg);
}

.preview-content video {
  max-width: 100%;
  max-height: calc(85vh - 70px);
  outline: none;
}

.preview-content audio {
  width: 80%;
  max-width: 600px;
}

.preview-iframe {
  width: 100%;
  height: calc(85vh - 70px);
  border: none;
  background: white;
}

.preview-text {
  width: 100%;
  height: calc(85vh - 70px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: none;
  font-family: 'Courier New', Courier, monospace;
  padding: 24px;
  font-size: 0.9rem;
  resize: none;
  outline: none;
}

.preview-fallback {
  text-align: center;
  padding: 40px;
}

.preview-fallback svg {
  width: 64px;
  height: 64px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* File Upload Drop Area (Dashed Box) */
.upload-btn-label {
  display: inline-flex;
  cursor: pointer;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .sidebar {
    display: none; /* スマホではサイドバーを非表示、あるいはハンバーガーメニューにする */
  }
  
  .top-bar {
    padding: 0 16px;
  }
  
  .search-bar {
    width: 180px;
  }
  
  .actions-bar {
    padding: 16px;
  }
  
  .file-browser {
    padding: 0 16px 16px 16px;
  }

  .file-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
  }
  
  .file-card {
    height: 150px;
    padding: 12px;
  }
  
  .file-icon-wrapper {
    width: 50px;
    height: 50px;
  }
  
  .file-icon {
    width: 30px;
    height: 30px;
  }
  
  .file-name {
    font-size: 0.8rem;
  }
  
  .file-row {
    grid-template-columns: 3fr 1fr; /* スマホではサイズや更新日時を省略 */
  }
  
  .file-row-meta.date, .file-row-meta.size {
    display: none;
  }
}