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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #d0d0d0;
    --primary-color: #4a4a4a;
    --primary-hover: #3a3a3a;
    --danger-color: #d32f2f;
    --danger-hover: #b71c1c;
    --shadow: 0 1.7px 6.8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 3.4px 13.6px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header */
.header {
    background-color: var(--bg-primary);
    padding: 1.275rem 1.7rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 1.147rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.425rem;
}

.header h1 i {
    width: 20.4px;
    height: 20.4px;
}

/* Buttons */
.btn {
    padding: 0.637rem 1.275rem;
    border: none;
    border-radius: 5.1px;
    font-size: 0.727rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.425rem;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

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

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.425rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 3.4px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.btn-icon:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-icon i {
    width: 15.3px;
    height: 15.3px;
}

/* Main Content */
.main-content {
    max-width: 1530px;
    margin: 0 auto;
    padding: 1.7rem;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
    gap: 1.275rem;
}

.project-card {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 1.275rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-1.7px);
}

.project-card h3 {
    font-size: 0.956rem;
    margin-bottom: 0.425rem;
    color: var(--text-primary);
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.689rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.project-stats {
    margin: 1rem 0;
    padding: 0.637rem;
    background-color: var(--bg-secondary);
    border-radius: 5.1px;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.425rem;
    font-size: 0.689rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-item i {
    width: 13.6px;
    height: 13.6px;
    color: var(--primary-color);
}

.project-card .project-url {
    color: var(--text-tertiary);
    font-size: 0.65rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.212rem;
}

.project-card .project-url:hover {
    color: var(--primary-color);
}

.project-card .project-url i {
    width: 11.9px;
    height: 11.9px;
}

/* Project Details */
.project-header {
    background-color: var(--bg-primary);
    padding: 1.7rem;
    border-radius: 6.8px;
    box-shadow: var(--shadow);
    margin-bottom: 1.275rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.275rem;
}

.project-info {
    flex: 1;
}

.project-info h2 {
    font-size: 1.339rem;
    margin-bottom: 0.425rem;
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: 0.637rem;
}

.project-url {
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.212rem;
}

.project-url:hover {
    text-decoration: underline;
}

.project-bottleneck {
    margin-top: 0.637rem;
    font-size: 0.727rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.project-bottleneck strong {
    color: var(--primary-color);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.425rem;
    margin-bottom: 1.275rem;
    border-bottom: 1.7px solid var(--border-color);
}

.tab {
    padding: 1rem 1.275rem;
    background: none;
    border: none;
    border-bottom: 1.7px solid transparent;
    cursor: pointer;
    font-size: 0.727rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.425rem;
    margin-bottom: -1.7px;
    transition: all 0.2s;
}

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

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab i {
    width: 15.3px;
    height: 15.3px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Journeys List */
.journeys-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.journey-card {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 0;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.journey-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s;
    border-radius: 5.1px 5.1px 0 0;
}

.journey-header:hover {
    background-color: var(--bg-secondary);
}

.journey-header h4 {
    font-size: 0.765rem;
    color: var(--text-primary);
    margin: 0;
}

.journey-date {
    font-size: 0.65rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.journey-header .user-id {
    font-family: monospace;
    font-size: 0.65rem;
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    padding: 0.212rem 0.425rem;
    border-radius: 3.4px;
}

.journey-chevron {
    width: 15.3px;
    height: 15.3px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.journey-count {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.btn-delete-journey {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.425rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 3.4px;
    color: var(--text-tertiary);
    transition: all 0.2s;
    opacity: 0.7;
}

.btn-delete-journey:hover {
    background-color: var(--bg-tertiary);
    color: var(--danger-color);
    opacity: 1;
}

.btn-delete-journey i {
    width: 13.6px;
    height: 13.6px;
}

.journey-events {
    padding: 1.275rem;
    padding-top: 1rem;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8.5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.steps-container {
    position: relative;
    display: flex;
    flex-direction: row;
    gap: 0;
    padding: 1rem 0;
    overflow-x: visible;
    overflow-y: hidden;
    flex-wrap: nowrap;
}

.journey-step {
    position: relative;
    flex-shrink: 0;
    min-width: 136px;
    flex: 1;
    padding: 0 0.637rem;
}

.journey-step:first-child {
    padding-left: 0;
}

.journey-step:last-child {
    padding-right: 0;
}

.step-connector {
    position: absolute;
    left: calc(50% + 0.637rem);
    top: calc(2.125em + 0.425rem + 0.637rem);
    width: calc(100% - 1.275rem);
    height: 1.7px;
    background-color: var(--border-color);
    z-index: 1;
    transition: background-color 0.3s;
    transform: translateY(-1px);
}

.journey-step.completed .step-connector {
    background-color: #10b981;
}

.journey-step.last .step-connector {
    display: none;
}

.step-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.425rem;
    position: relative;
    z-index: 2;
    justify-content: flex-start;
}

.step-icon {
    width: 1.275rem;
    height: 1.275rem;
    border-radius: 50%;
    background-color: #d1fae5;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 1.7px 6.8px rgba(34, 197, 94, 0.2);
    position: relative;
    z-index: 3;
    transition: all 0.3s;
}

.journey-step.pending .step-icon {
    background-color: var(--bg-tertiary);
    box-shadow: 0 1.7px 6.8px rgba(0, 0, 0, 0.1);
}

.step-icon i {
    width: 0.765rem;
    height: 0.765rem;
    color: #10b981;
}

.journey-step.pending .step-icon i {
    color: var(--text-tertiary);
}

.step-title {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.65rem;
    line-height: 1.3;
    text-align: center;
    margin-bottom: 0.212rem;
    min-height: 1.87em;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.journey-step.pending .step-title {
    color: var(--text-secondary);
    opacity: 0.7;
}

.step-time {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    font-family: monospace;
    text-align: center;
    margin-top: 0.212rem;
}

.step-time.step-pending {
    color: var(--text-tertiary);
    opacity: 0.6;
    font-style: italic;
}

/* Events List */
.events-list {
    display: flex;
    flex-direction: column;
    gap: 0.637rem;
}

.event-item {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 1rem 1.275rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.event-item .event-info {
    display: flex;
    flex-direction: column;
    gap: 0.212rem;
}

.event-item .event-type {
    font-weight: 500;
    color: var(--text-primary);
}

.event-item .event-meta {
    font-size: 0.65rem;
    color: var(--text-secondary);
    display: flex;
    gap: 1rem;
}

.event-item .event-time {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    font-family: monospace;
}

/* Settings */
.settings-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.7rem;
}

.settings-header h2 {
    font-size: 1.147rem;
}

.settings-content {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 1.7rem;
    box-shadow: var(--shadow);
}

.settings-section {
    margin-bottom: 2.125rem;
    padding-bottom: 2.125rem;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-section.danger {
    border-color: var(--danger-color);
}

.settings-section h3 {
    font-size: 0.956rem;
    margin-bottom: 1.275rem;
}

.info-item {
    margin-bottom: 1.275rem;
}

.info-item label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.425rem;
    color: var(--text-secondary);
    font-size: 0.689rem;
}

.info-value {
    display: flex;
    align-items: center;
    gap: 0.425rem;
}

.info-value code {
    flex: 1;
    background-color: var(--bg-secondary);
    padding: 0.637rem;
    border-radius: 5.1px;
    font-family: monospace;
    font-size: 0.65rem;
    word-break: break-all;
    border: 1px solid var(--border-color);
}

/* Forms */
.form-group {
    margin-bottom: 1.275rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.425rem;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.637rem;
    border: 1px solid var(--border-color);
    border-radius: 5.1px;
    font-size: 0.727rem;
    font-family: inherit;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 0;
    max-width: 510px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.275rem 1.7rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.147rem;
}

.modal-content form {
    padding: 1.7rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.275rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3.4rem 1.7rem;
    color: var(--text-secondary);
}

.empty-state i {
    width: 54.4px;
    height: 54.4px;
    margin: 0 auto 1rem;
    display: block;
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 0.956rem;
    margin-bottom: 0.425rem;
    color: var(--text-primary);
}

/* Loading */
.loading {
    text-align: center;
    padding: 1.7rem;
    color: var(--text-secondary);
}

/* Chart Filters */
.chart-filters {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 1.275rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.275rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.chart-filter-item {
    display: flex;
    align-items: center;
    gap: 0.425rem;
    cursor: pointer;
    padding: 0.425rem 0.637rem;
    border-radius: 5.1px;
    transition: background-color 0.2s;
    user-select: none;
}

.chart-filter-item:hover {
    background-color: var(--bg-secondary);
}

.chart-filter-checkbox {
    width: 15.3px;
    height: 15.3px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.chart-filter-color {
    width: 13.6px;
    height: 13.6px;
    border-radius: 50%;
    border: 1.7px solid var(--bg-primary);
    box-shadow: 0 0 0 1px var(--border-color);
    flex-shrink: 0;
}

.chart-filter-label {
    font-size: 0.727rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Chart Container */
.chart-container {
    background-color: var(--bg-primary);
    border-radius: 6.8px;
    padding: 1.7rem;
    box-shadow: var(--shadow);
    height: 425px;
    position: relative;
}

/* Responsive */
@media (max-width: 652.8px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-header {
        flex-direction: column;
    }

    .tabs {
        overflow-x: auto;
    }
}