/* ============================================================
   ProjectShare – Stylesheet
   Modernes, ruhiges Design ohne externe Abhängigkeiten.
   ============================================================ */

/* Variables */
:root {
  --color-bg:         #f5f6f8;
  --color-surface:    #ffffff;
  --color-border:     #e2e5ea;
  --color-primary:    #2563eb;
  --color-primary-h:  #1d4ed8;
  --color-danger:     #dc2626;
  --color-warning:    #d97706;
  --color-success:    #16a34a;
  --color-text:       #1a1f2e;
  --color-muted:      #6b7280;
  --color-sidebar:    #1e2130;
  --color-sidebar-h:  #2a2f42;
  --color-sidebar-t:  #c9cdd8;
  --sidebar-width:    240px;
  --topbar-height:    56px;
  --radius:           8px;
  --shadow:           0 1px 4px rgba(0,0,0,.08);
  --shadow-md:        0 4px 16px rgba(0,0,0,.12);
  --font:             -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.6; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ============================================================
   AUTH / PUBLIC
   ============================================================ */
.page-public { background: linear-gradient(135deg, #1e2130 0%, #2563eb 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.auth-wrapper { width: 100%; display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card { background: #fff; border-radius: 12px; padding: 40px; width: 100%; max-width: 420px; box-shadow: var(--shadow-md); }
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo-icon { font-size: 3rem; display: block; margin-bottom: 12px; }
.auth-logo h1 { font-size: 1.6rem; font-weight: 700; color: var(--color-text); }
.auth-logo p { color: var(--color-muted); font-size: .9rem; }
.auth-form .form-group { margin-bottom: 16px; }

/* ============================================================
   APP LAYOUT
   ============================================================ */
.app-layout { display: flex; min-height: 100vh; }

/* SIDEBAR */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar);
  color: var(--color-sidebar-t);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform .25s ease;
}
.sidebar-header { padding: 20px 16px 16px; border-bottom: 1px solid rgba(255,255,255,.07); display: flex; align-items: center; justify-content: space-between; }
.sidebar-logo { color: #fff; font-size: 1.2rem; font-weight: 700; text-decoration: none; }
.sidebar-logo:hover { text-decoration: none; }
.sidebar-close { display: none; background: none; border: none; color: #fff; font-size: 1.1rem; cursor: pointer; }

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 20px; color: var(--color-sidebar-t); font-size: .93rem; transition: background .15s; border-left: 3px solid transparent; }
.nav-item:hover { background: var(--color-sidebar-h); text-decoration: none; color: #fff; }
.nav-item.active { background: var(--color-sidebar-h); color: #fff; border-left-color: var(--color-primary); }
.nav-icon { width: 20px; text-align: center; }
.nav-divider { padding: 16px 20px 6px; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: rgba(255,255,255,.3); }

.sidebar-footer { padding: 16px; border-top: 1px solid rgba(255,255,255,.07); display: flex; align-items: center; gap: 8px; }
.sidebar-user { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; text-decoration: none; color: var(--color-sidebar-t); }
.sidebar-user:hover { color: #fff; text-decoration: none; }
.user-avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--color-primary); color: #fff; font-weight: 700; font-size: .9rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.user-info { display: flex; flex-direction: column; min-width: 0; }
.user-name { font-size: .85rem; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: .75rem; color: rgba(255,255,255,.4); }
.btn-logout { background: none; border: none; color: rgba(255,255,255,.5); font-size: 1.1rem; cursor: pointer; padding: 4px 8px; border-radius: 4px; }
.btn-logout:hover { background: rgba(255,255,255,.1); color: #fff; }

/* MAIN */
.main-area { margin-left: var(--sidebar-width); flex: 1; display: flex; flex-direction: column; min-width: 0; }

/* TOPBAR */
.topbar { height: var(--topbar-height); background: var(--color-surface); border-bottom: 1px solid var(--color-border); display: flex; align-items: center; gap: 16px; padding: 0 24px; position: sticky; top: 0; z-index: 50; box-shadow: var(--shadow); }
.sidebar-toggle { display: none; background: none; border: none; font-size: 1.3rem; cursor: pointer; color: var(--color-text); }
.topbar-search { flex: 1; max-width: 420px; }
.search-input { width: 100%; padding: 8px 14px; border: 1px solid var(--color-border); border-radius: 20px; font-size: .9rem; background: var(--color-bg); transition: border-color .15s; outline: none; }
.search-input:focus { border-color: var(--color-primary); background: #fff; }
.topbar-actions { margin-left: auto; }
.notif-badge { background: #fee2e2; color: var(--color-danger); padding: 4px 10px; border-radius: 20px; font-size: .85rem; font-weight: 600; text-decoration: none; }

/* FLASH */
.flash-container { padding: 12px 24px 0; }
.flash { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-radius: var(--radius); margin-bottom: 8px; font-size: .9rem; }
.flash-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }
.flash-info { background: #dbeafe; color: #1d4ed8; border: 1px solid #bfdbfe; }
.flash-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.flash-close { background: none; border: none; cursor: pointer; font-size: .85rem; opacity: .6; margin-left: 8px; }

/* MAIN CONTENT */
.main-content { flex: 1; padding: 28px 28px 40px; }

/* ============================================================
   COMPONENTS
   ============================================================ */

/* Page header */
.page-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.page-header h2 { font-size: 1.4rem; font-weight: 700; }
.page-actions { display: flex; gap: 10px; }

/* Breadcrumb */
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: .9rem; color: var(--color-muted); flex-wrap: wrap; }
.breadcrumb a { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-border); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius); border: none; cursor: pointer; font-size: .9rem; font-weight: 500; text-decoration: none; transition: background .15s, box-shadow .15s; }
.btn:hover { text-decoration: none; }
.btn-sm { padding: 5px 10px; font-size: .82rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-h); }
.btn-secondary { background: var(--color-bg); color: var(--color-text); border: 1px solid var(--color-border); }
.btn-secondary:hover { background: var(--color-border); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-warning { background: var(--color-warning); color: #fff; }
.btn-warning:hover { background: #b45309; }
.btn-icon { background: none; border: none; cursor: pointer; padding: 4px 8px; border-radius: 4px; font-size: .95rem; color: var(--color-muted); transition: background .15s, color .15s; }
.btn-icon:hover { background: var(--color-bg); color: var(--color-text); }
.btn-icon.btn-danger { color: var(--color-danger); }
.btn-link { background: none; border: none; cursor: pointer; color: var(--color-primary); font-size: .85rem; padding: 0; }
.btn-danger-link { color: var(--color-danger); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .88rem; font-weight: 500; margin-bottom: 5px; color: var(--color-text); }
.form-group input[type=text], .form-group input[type=email],
.form-group input[type=password], .form-group input[type=search],
.form-group input[type=date], .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--color-border); border-radius: var(--radius);
  font-size: .9rem; background: #fff; color: var(--color-text); outline: none; transition: border-color .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--color-primary); }
.form-group small { font-size: .8rem; color: var(--color-muted); }
.form-check label { font-size: .9rem; display: flex; align-items: center; gap: 8px; cursor: pointer; }
.form-actions { display: flex; gap: 10px; margin-top: 24px; }
.form-group-btn { display: flex; align-items: flex-end; gap: 8px; }
.required { color: var(--color-danger); }
.form-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 28px; max-width: 560px; box-shadow: var(--shadow); }
.inline-form { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.inline-form input { flex: 1; min-width: 180px; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: .78rem; font-weight: 600; }
.badge-green { background: #dcfce7; color: #15803d; }
.badge-red { background: #fee2e2; color: #b91c1c; }
.badge-blue { background: #dbeafe; color: #1d4ed8; }

/* Stats grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; text-align: center; box-shadow: var(--shadow); }
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--color-primary); }
.stat-label { font-size: .85rem; color: var(--color-muted); margin-top: 4px; }

/* Quick actions */
.quick-actions { display: flex; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }
.quick-btn { display: flex; align-items: center; gap: 8px; padding: 12px 20px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); font-size: .9rem; color: var(--color-text); text-decoration: none; box-shadow: var(--shadow); transition: box-shadow .15s, border-color .15s; }
.quick-btn:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); text-decoration: none; }
.quick-btn span { font-size: 1.1rem; }

/* Dashboard grid */
.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: 24px; }
.dashboard-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.dashboard-section h3 { font-size: 1rem; font-weight: 600; margin-bottom: 14px; color: var(--color-text); }

/* Notification bar */
.notification-bar { background: #eff6ff; border: 1px solid #bfdbfe; border-radius: var(--radius); padding: 14px 18px; margin-bottom: 24px; }
.notification-bar ul { list-style: none; margin-top: 8px; }
.notification-bar li { font-size: .88rem; padding: 3px 0; }

/* File list compact (dashboard) */
.file-list-compact { display: flex; flex-direction: column; gap: 10px; }
.file-item-compact { display: flex; align-items: center; gap: 12px; }
.file-item-compact .file-info { flex: 1; min-width: 0; }
.file-item-compact .file-name { font-size: .9rem; font-weight: 500; color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.file-item-compact .file-meta { font-size: .78rem; color: var(--color-muted); }

/* Activity list */
.activity-list { list-style: none; }
.activity-item { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--color-bg); font-size: .88rem; gap: 12px; }
.activity-item:last-child { border-bottom: none; }
.activity-text { flex: 1; }
.activity-time { color: var(--color-muted); white-space: nowrap; font-size: .8rem; }
.activity-error .activity-text { color: var(--color-danger); }

/* Folder grid */
.folder-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 24px; }
.folder-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 0; overflow: hidden; box-shadow: var(--shadow); position: relative; transition: box-shadow .15s; }
.folder-card:hover { box-shadow: var(--shadow-md); }
.folder-link { display: flex; flex-direction: column; align-items: center; padding: 20px 16px 12px; text-decoration: none; color: var(--color-text); }
.folder-link:hover { text-decoration: none; background: var(--color-bg); }
.folder-icon { font-size: 2rem; margin-bottom: 8px; }
.folder-name { font-size: .88rem; font-weight: 500; text-align: center; word-break: break-word; }
.folder-count { font-size: .75rem; color: var(--color-muted); margin-top: 4px; }
.folder-actions { display: flex; justify-content: center; gap: 4px; padding: 4px 8px 8px; border-top: 1px solid var(--color-bg); }

/* Sort bar */
.sort-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: .85rem; color: var(--color-muted); flex-wrap: wrap; }
.sort-link { color: var(--color-muted); padding: 4px 8px; border-radius: 4px; }
.sort-link:hover { background: var(--color-bg); text-decoration: none; }
.sort-link.active { color: var(--color-primary); font-weight: 600; }

/* Files table */
.files-table-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); overflow-x: auto; }
.files-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.files-table th { padding: 10px 14px; background: var(--color-bg); border-bottom: 1px solid var(--color-border); text-align: left; font-weight: 600; font-size: .82rem; color: var(--color-muted); white-space: nowrap; }
.files-table td { padding: 10px 14px; border-bottom: 1px solid var(--color-bg); vertical-align: middle; }
.files-table tr:last-child td { border-bottom: none; }
.files-table tr:hover td { background: rgba(37,99,235,.03); }
.file-name-cell { display: flex; align-items: flex-start; gap: 10px; }
.file-link { font-weight: 500; color: var(--color-text); }
.file-link:hover { color: var(--color-primary); }
.file-desc { font-size: .78rem; color: var(--color-muted); margin-top: 2px; }
.file-folder-hint { font-size: .75rem; color: var(--color-muted); }
.file-actions { display: flex; align-items: center; gap: 4px; white-space: nowrap; }
.nowrap { white-space: nowrap; }
.row-inactive td { opacity: .55; }
.row-error td { background: #fff5f5; }

/* File icons */
.file-icon, .file-icon-sm { display: inline-block; width: 28px; height: 28px; border-radius: 4px; background: var(--color-bg); border: 1px solid var(--color-border); flex-shrink: 0; position: relative; font-size: 1rem; line-height: 28px; text-align: center; }
.file-icon-sm { width: 22px; height: 22px; line-height: 22px; font-size: .8rem; }
.icon-pdf::before     { content: '📄'; }
.icon-word::before    { content: '📝'; }
.icon-excel::before   { content: '📊'; }
.icon-ppt::before     { content: '📈'; }
.icon-zip::before     { content: '🗜'; }
.icon-image::before   { content: '🖼'; }
.icon-video::before   { content: '🎬'; }
.icon-audio::before   { content: '🎵'; }
.icon-code::before    { content: '💻'; }
.icon-text::before    { content: '📋'; }
.icon-file::before    { content: '📄'; }

/* Upload area */
.upload-area { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; margin-bottom: 24px; box-shadow: var(--shadow); }
.drop-zone { border: 2px dashed var(--color-border); border-radius: var(--radius); padding: 32px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s; background: var(--color-bg); }
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--color-primary); background: #eff6ff; }
.drop-icon { font-size: 2.5rem; display: block; margin-bottom: 10px; }
.drop-zone p { color: var(--color-muted); font-size: .9rem; }
.file-input-hidden { display: none; }
.upload-file-list { margin-top: 12px; }
.upload-file-item { display: flex; align-items: center; justify-content: space-between; padding: 6px 10px; background: var(--color-bg); border-radius: 4px; margin-bottom: 4px; font-size: .85rem; }
.upload-progress { margin-top: 14px; }
.progress-bar { background: var(--color-bg); border-radius: 8px; height: 8px; overflow: hidden; border: 1px solid var(--color-border); }
.progress-fill { height: 100%; background: var(--color-primary); width: 0%; transition: width .2s; }
.upload-actions { display: flex; gap: 10px; margin-top: 14px; }

/* New folder form */
.new-folder-form { margin-bottom: 20px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; }

/* Empty state */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-icon { font-size: 3.5rem; margin-bottom: 16px; }
.empty-state p { color: var(--color-muted); margin-bottom: 20px; }

/* Detail / Versions */
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 24px; margin-bottom: 24px; }
.detail-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.detail-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.info-list { display: grid; grid-template-columns: 140px 1fr; gap: 6px 16px; font-size: .88rem; }
.info-list dt { color: var(--color-muted); font-weight: 500; }
.info-list dd { word-break: break-all; }
.checksum { font-size: .72rem; word-break: break-all; }

.versions-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.version-item { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 14px; }
.version-current { background: #eff6ff; border-color: #bfdbfe; }
.version-header { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.version-badge { background: var(--color-primary); color: #fff; padding: 2px 8px; border-radius: 12px; font-size: .8rem; font-weight: 700; }
.badge-current { background: #dcfce7; color: #15803d; padding: 2px 8px; border-radius: 12px; font-size: .78rem; font-weight: 600; }
.version-meta { font-size: .8rem; color: var(--color-muted); flex: 1; }
.version-note { font-size: .83rem; color: var(--color-text); margin-bottom: 8px; }
.version-restored { font-size: .78rem; color: var(--color-muted); margin-bottom: 8px; }
.version-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.upload-new-version { border-top: 1px solid var(--color-border); padding-top: 16px; }
.upload-new-version h4 { font-size: .9rem; font-weight: 600; margin-bottom: 12px; }

.preview-img { max-height: 200px; border-radius: 4px; border: 1px solid var(--color-border); margin-top: 12px; }
.file-preview { margin-top: 12px; }
.desc-form { margin-top: 16px; border-top: 1px solid var(--color-border); padding-top: 16px; }

/* Comments */
.comments-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.comments-section h3 { font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.comment { border-bottom: 1px solid var(--color-bg); padding: 14px 0; }
.comment:last-of-type { border-bottom: none; }
.comment-header { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.comment-author { font-weight: 600; font-size: .88rem; }
.comment-date { font-size: .78rem; color: var(--color-muted); }
.comment-body { font-size: .88rem; line-height: 1.55; }
.comment-delete { margin-top: 6px; }
.comment-form { margin-top: 24px; border-top: 1px solid var(--color-border); padding-top: 20px; }

/* Filters */
.filter-form { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 20px; box-shadow: var(--shadow); }
.filter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }

/* Pagination */
.pagination { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 20px; }
.page-link { padding: 6px 12px; border: 1px solid var(--color-border); border-radius: 4px; font-size: .85rem; color: var(--color-text); text-decoration: none; }
.page-link.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.page-link:hover:not(.active) { background: var(--color-bg); text-decoration: none; }

/* Backup */
.backup-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 24px; margin-bottom: 24px; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; }
.modal.is-open { display: flex; }
.modal-box { background: var(--color-surface); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 440px; box-shadow: var(--shadow-md); position: relative; z-index: 201; }
.modal-box h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 18px; }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; }
.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 200; }

/* Text helpers */
.text-muted { color: var(--color-muted); font-size: .88rem; }
hr { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }
code { background: var(--color-bg); padding: 1px 5px; border-radius: 3px; font-size: .85em; border: 1px solid var(--color-border); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-close { display: block; }
  .sidebar-toggle { display: flex; }
  .main-area { margin-left: 0; }
  .main-content { padding: 16px; }
  .topbar { padding: 0 16px; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .filter-grid { grid-template-columns: 1fr 1fr; }
  .files-table { font-size: .8rem; }
  .files-table th:nth-child(3),
  .files-table td:nth-child(3) { display: none; }
  .folder-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .filter-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 24px; }
}