:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    padding: 20px;
}

.app-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    background: var(--card-bg);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* Buttons */
button {
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 9px 16px;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
    color: var(--text-main);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
}

.btn-text:hover {
    color: var(--text-main);
}

/* Controls */
.controls-section {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.search-box {
    flex: 1;
    position: relative;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 10px 12px 10px 36px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.actions-group {
    display: flex;
    gap: 12px;
}

.sort-dropdown select {
    padding: 10px 32px 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-main);
    background-color: white;
    cursor: pointer;
    outline: none;
}

/* Bulk Delete Panel */
.bulk-delete-panel {
    background: #fff1f2;
    border: 1px solid #fecdd3;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    display: none;
    animation: slideDown 0.3s ease;
}

.bulk-delete-panel.show {
    display: block;
}

.bulk-delete-panel h3 {
    color: #9f1239;
    font-size: 16px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.bulk-delete-panel p {
    color: #881337;
    font-size: 14px;
    margin-bottom: 16px;
}

.bulk-input-group {
    display: flex;
    gap: 12px;
}

.bulk-input-group input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid #fecdd3;
    border-radius: 8px;
    max-width: 300px;
}

/* Table */
.table-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    min-height: 300px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: #f9fafb;
    padding: 12px 24px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 12px 24px;
    font-size: 14px;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background-color: #f9fafb;
}

.font-mono {
    font-family: "Courier New", Courier, monospace;
}

/* Icon Buttons & Delete State */
.icon-btn {
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 4px;
    transition: all 0.2s;
    font-size: 14px;
}

.icon-btn:hover {
    color: var(--primary-color);
    background-color: #e0e7ff;
}

/* 红色确认状态 */
.icon-btn.confirm-delete {
    color: white !important;
    background-color: var(--danger-color) !important;
    animation: pulse 0.5s;
    font-weight: 600;
}

.icon-btn.confirm-delete:hover {
    background-color: #dc2626 !important;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

.state-box {
    text-align: center;
    padding: 60px;
    color: var(--text-secondary);
}

.state-box i {
    font-size: 32px;
    margin-bottom: 16px;
    display: block;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: white;
    width: 100%;
    max-width: 450px;
    border-radius: 16px;
    padding: 24px;
    transform: translateY(20px);
    transition: all 0.3s;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-overlay.open .modal-card {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 32px;
}

/* History List */
.history-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0;
}

.history-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item:hover {
    background: #f9fafb;
}

.history-info {
    font-size: 13px;
}

.history-time {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 4px;
}

.history-action {
    font-weight: 600;
    color: var(--text-main);
}

.btn-restore {
    font-size: 12px;
    padding: 6px 12px;
    background: var(--warning-color);
    color: white;
    border: none;
    border-radius: 4px;
}

.btn-restore:hover {
    filter: brightness(0.9);
}

.empty-history {
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 600px) {
    .controls-section {
        flex-direction: column;
    }

    .actions-group {
        justify-content: space-between;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

.divider-vertical {
    width: 1px;
    background: var(--border-color);
    margin: 0 4px;
}

/* Copy Interaction */
.copyable {
    cursor: pointer;
    position: relative;
    transition: background-color 0.2s;
}

.copyable:hover {
    background-color: #f3f4f6;
    color: var(--primary-color);
}

.copyable:active {
    background-color: #e5e7eb;
}

/* Occupation Badge */
.occupy-btn {
    border: 1px solid var(--border-color);
    background: white;
    padding: 4px 0;
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
}

.occupy-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.occupy-badge {
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    color: #4f46e5;
    padding: 4px 0;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
}

.occupy-badge:hover {
    background: #e0e7ff;
    text-decoration: line-through;
    color: var(--danger-color);
    border-color: #fca5a5;
}

/* Toast Notification (Simple) */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 2000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Emoji Grid */
.emoji-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.emoji-option {
    font-size: 24px;
    background: #f9fafb;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.emoji-option:hover {
    background: #eef2ff;
    border-color: var(--primary-color);
    transform: scale(1.1);
}