:root {
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --radius: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

.admin-container {
  max-width: 1200px;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 35px;
}

.logo-area {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(99, 102, 241, 0.1);
  padding: 8px 18px;
  border-radius: 30px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  margin-bottom: 16px;
}

.logo-area .icon {
  font-size: 22px;
}

.logo-area span {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #a5b4fc;
}

.header h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 10px;
  color: var(--text-main);
}

.header p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
}

/* Card */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  margin-bottom: 24px;
}

/* Form */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #e2e8f0;
}

.form-group label .required {
  color: var(--danger-color);
  margin-left: 4px;
}

.input-control {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  font-size: 15px;
  outline: none;
  transition: all 0.2s ease;
}

.input-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* File Upload Dropzone */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  padding: 36px 20px;
  text-align: center;
  background: rgba(15, 23, 42, 0.4);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-color);
  background: rgba(99, 102, 241, 0.08);
}

.dropzone-icon {
  font-size: 42px;
  margin-bottom: 12px;
  display: block;
}

.dropzone-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.dropzone-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.format-tags {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.tag-mid { background: rgba(59, 130, 246, 0.2); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.4); }
.tag-nbs { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.4); }
.tag-gnbs { background: rgba(245, 158, 11, 0.2); color: #fde68a; border: 1px solid rgba(245, 158, 11, 0.4); }

.file-preview {
  display: none;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 14px 18px;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
}

.file-preview.active {
  display: flex;
}

.file-list-wrap {
  display: none;
  margin-top: 14px;
}

.file-list-wrap.active {
  display: block;
}

.file-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 240px;
  overflow-y: auto;
  padding-right: 4px;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
}

.file-item-left {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.file-item-name {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 420px;
}

.file-item-size {
  color: var(--text-muted);
  font-size: 12px;
}

.file-actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.file-preview-info {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.file-preview-name {
  font-weight: 600;
  font-size: 14px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.file-preview-size {
  font-size: 12px;
  color: var(--text-muted);
}

.btn-remove-file {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 18px;
  padding: 4px;
  transition: color 0.2s;
}

.btn-remove-file:hover {
  color: var(--danger-color);
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--accent-color);
  color: white;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-sm {
  width: auto;
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 6px;
  font-weight: 600;
  box-shadow: none;
}

.btn-success { background: #059669; }
.btn-success:hover { background: #047857; }
.btn-danger { background: #dc2626; }
.btn-danger:hover { background: #b91c1c; }
.btn-secondary { background: rgba(255, 255, 255, 0.1); color: #e2e8f0; }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.18); }

/* Notice & Status */
.alert {
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}

.alert.show {
  display: block;
}

.alert-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.alert-danger {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #f87171;
}

/* Footer */
footer {
  margin-top: auto;
  text-align: center;
  padding: 24px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer a {
  color: #a5b4fc;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Admin Dashboard Elements */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.admin-header-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}

.stat-box-title {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
}

.stat-box-value {
  font-size: 28px;
  font-weight: 800;
}

.stat-pending { color: var(--warning-color); }
.stat-approved { color: var(--success-color); }
.stat-total { color: var(--text-main); }

.stat-path {
  font-size: 11px;
  color: #a5b4fc;
  word-break: break-all;
  margin-top: 4px;
}

/* Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

th {
  padding: 14px 16px;
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

td {
  padding: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  vertical-align: middle;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.status-badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
}

.status-PENDING { background: rgba(245, 158, 11, 0.2); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.4); }
.status-APPROVED { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.4); }
.status-REJECTED { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.4); }

.ip-badge {
  font-family: monospace;
  background: rgba(15, 23, 42, 0.8);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  color: #93c5fd;
}

.actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #1e293b;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px;
  width: 90%;
  max-width: 420px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.filter-bar {
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  gap: 6px;
}

.filter-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
}

.filter-btn.active, .filter-btn:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}