:root {
    --history-background: var(--card-bg, #ffffff);
    --history-text: var(--text-color, #333333);
    --history-accent: var(--accent-color, #4a6cf7);
    --history-hover: var(--hover-bg, #f5f7ff);
    --history-border: var(--border-color, #eaeaea);
    --history-danger: #e53935;
    --history-danger-hover: #c62828;
    --history-success: #43a047;
    --history-muted: #757575;
    --history-header-height: 120px;
    --history-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --history-radius: 8px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    font-family: var(--font-family, 'Inter', sans-serif);
    overflow-x: hidden;
}

.history-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--history-background);
    color: var(--history-text);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.history-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: var(--history-background);
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--history-border);
}

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

.header-left h1 {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.back-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--history-hover);
    cursor: pointer;
    transition: background 0.2s;
}

.back-button:hover {
    background: var(--history-border);
}

.back-button svg {
    width: 20px;
    height: 20px;
    stroke: var(--history-text);
}

.search-bar {
    display: flex;
    align-items: center;
    background-color: var(--history-hover);
    border-radius: 24px;
    padding: 8px 16px;
    flex: 1;
    max-width: 500px;
    position: relative;
    height: 40px;
}

.search-bar svg {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    stroke: var(--history-muted);
}

.search-bar input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 14px;
    outline: none;
    color: var(--history-text);
}

.search-bar input::placeholder {
    color: var(--history-muted);
}

.search-clear {
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
}

.search-clear svg {
    width: 16px;
    height: 16px;
    margin: 0;
}

.search-clear:hover {
    background: rgba(0, 0, 0, 0.05);
}

.filter-container {
    position: relative;
}

.filter-container select {
    appearance: none;
    background-color: var(--history-hover);
    border: none;
    border-radius: 24px;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--history-text);
    cursor: pointer;
    outline: none;
    min-width: 140px;
    height: 40px;
}

.filter-container::after {
    content: "";
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--history-text);
    pointer-events: none;
}

.history-actions {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--history-border);
}

.history-actions button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 24px;
    border: 1px solid var(--history-border);
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.history-actions button svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
}

.history-actions button:hover {
    background: var(--history-hover);
}

.history-actions button:active {
    transform: translateY(1px);
}

.history-actions button[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

#clear-all {
    color: var(--history-danger);
}

#clear-all:hover {
    background: rgba(229, 57, 53, 0.1);
}

.history-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
}

.history-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 16px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--history-border);
    border-top-color: var(--history-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.history-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.history-empty .empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    color: var(--history-muted);
    display: flex;
    justify-content: center;
    align-items: center;
}

.history-empty .empty-icon svg {
    width: 100%;
    height: 100%;
}

.history-empty h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 8px;
}

.history-empty p {
    color: var(--history-muted);
    max-width: 300px;
}

.history-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.history-date-group {
    display: flex;
    flex-direction: column;
}

.history-date-header {
    font-size: 14px;
    font-weight: 600;
    color: var(--history-muted);
    padding: 8px 0;
    border-bottom: 1px solid var(--history-border);
    margin-bottom: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border-radius: var(--history-radius);
    transition: background 0.2s;
    position: relative;
}

.history-item:hover {
    background: var(--history-hover);
}

.history-item-checkbox {
    margin-right: 12px;
}

.history-item-favicon {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    border-radius: 4px;
    background: var(--history-border);
    overflow: hidden;
}

.history-item-favicon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.history-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.history-item-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item-url {
    font-size: 12px;
    color: var(--history-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item-time {
    font-size: 12px;
    color: var(--history-muted);
    margin-left: 16px;
    white-space: nowrap;
    min-width: 70px;
    text-align: right;
}

.history-item-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 16px;
    opacity: 0;
    transition: opacity 0.2s;
}

.history-item:hover .history-item-actions {
    opacity: 1;
}

.history-item-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: transparent;
    cursor: pointer;
}

.history-item-action:hover {
    background: rgba(0, 0, 0, 0.05);
}

.history-item-action svg {
    width: 16px;
    height: 16px;
    stroke: var(--history-muted);
}

.history-item-action.delete:hover svg {
    stroke: var(--history-danger);
}

.history-load-more {
    display: flex;
    justify-content: center;
    padding: 20px 0;
}

.history-load-more button {
    padding: 8px 24px;
    border-radius: 24px;
    border: none;
    background: var(--history-accent);
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.history-load-more button:hover {
    background: var(--history-accent);
    filter: brightness(1.1);
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.modal.hidden {
    display: none;
}

.modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--history-background);
    border-radius: var(--history-radius);
    box-shadow: var(--history-shadow);
    position: relative;
    z-index: 1;
    transform: translateY(20px);
    transition: transform 0.3s;
    max-width: 90%;
}

.modal:not(.hidden) .modal-content {
    transform: translateY(0);
}

.modal-content.confirmation-dialog {
    width: 400px;
    max-width: 90%;
    padding: 24px;
    box-sizing: border-box;
    opacity: 1 !important;
    visibility: visible !important;
}

.history-empty .empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    color: var(--history-muted);
    display: flex;
    justify-content: center;
    align-items: center;
}

.history-empty .empty-icon svg {
    width: 100%;
    height: 100%;
}

.globe-icon {
    width: 16px !important;
    height: 16px !important;
    stroke: var(--history-muted);
    display: block;
    margin: 0 auto;
}

.history-item-favicon svg {
    width: 16px;
    height: 16px;
    background: var(--history-hover);
    border-radius: 4px;
    padding: 2px;
}

.history-empty:not(.hidden) + .history-items {
    display: none !important;
}

@media (min-width: 768px) {
    .history-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .header-right {
        justify-content: flex-end;
    }
}

@media (max-width: 767px) {
    .history-item-time {
        display: none;
    }
    
    .history-item-actions {
        opacity: 1;
    }
    
    .history-actions {
        justify-content: space-between;
    }
    
    .history-actions button span {
        display: none;
    }
    
    .history-actions button {
        padding: 8px;
    }
}