:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #3182ce;
    --danger: #f85149;
    --success: #2ea043;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.status-bar {
    background-color: var(--card-bg);
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #333;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.status-bar h1 {
    font-size: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

#current-task-display {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 5px;
}

#duration-display {
    font-size: 1.5rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-primary);
}

.container {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.task-btn-container {
    display: flex;
    align-items: stretch;
    background-color: #2c2c2c;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s;
    cursor: grab;
}
.task-btn-container:active {
    cursor: grabbing;
}
.task-btn-container.dragging {
    opacity: 0.4;
}
.task-btn-container.drag-over {
    box-shadow: 0 0 0 2px var(--accent);
}

.task-btn-container:hover {
    transform: translateY(-2px);
}

.btn {
    border: none;
    padding: 12px 15px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.btn.primary {
    flex: 1;
    background-color: transparent;
    color: var(--text-primary);
    text-align: left;
}

.btn.primary:hover {
    background-color: rgba(255,255,255,0.1);
}

.btn.active {
    background-color: rgba(187, 134, 252, 0.2);
    color: var(--accent);
}

.btn.delete {
    background-color: transparent;
    color: var(--danger);
    padding: 12px;
    font-size: 1.2rem;
    line-height: 1;
}

.btn.delete:hover {
    background-color: rgba(207, 102, 121, 0.2);
}

.manage-tasks {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

input[type="text"], select {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #444;
    background-color: #2c2c2c;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

input[type="text"]:focus, select:focus {
    border-color: var(--accent);
}

.btn.secondary {
    background-color: var(--accent);
    color: #000;
    border-radius: 8px;
}

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

.calendar-header {
    display: flex;
    justify-content: flex-start;
    gap: 15px;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
}

.calendar-header h2 {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

/* Tabs */
.tabs-header {
    display: flex;
    gap: 15px;
    border-bottom: 1px solid #333;
    margin-bottom: 20px;
}
.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px 15px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    border-bottom: 3px solid transparent;
}
.tab-btn:hover {
    color: var(--text-primary);
}
.tab-btn.active {
    color: var(--accent);
    border-bottom: 3px solid var(--accent);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}
.entries-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}
.entries-table th, .entries-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #333;
    font-size: 0.95rem;
    vertical-align: middle;
}
.entries-table th {
    color: var(--text-secondary);
    font-weight: 600;
}
.entry-actions {
    white-space: nowrap;
}
.entry-btn {
    background-color: #2c2c2c;
    border: 1px solid #444;
    border-radius: 6px;
    color: var(--text-primary);
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
    margin-right: 10px;
}
.entry-btn:last-child {
    margin-right: 0;
}
.entry-btn:hover {
    background-color: var(--accent);
    color: #000;
    border-color: var(--accent);
}
.entry-btn.del:hover {
    background-color: var(--danger);
    color: #000;
    border-color: var(--danger);
}

#calendar-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.day-card {
    background-color: #252525;
    border-radius: 8px;
    padding: 15px;
}

.day-header {
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--accent);
    display: flex;
    justify-content: space-between;
}

.task-bar-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.task-label {
    min-width: 100px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.task-bar-bg {
    flex: 1;
    background-color: #333;
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
}

.task-bar-fill {
    height: 100%;
    background-color: var(--accent);
    border-radius: 6px;
}

.task-duration {
    min-width: 70px;
    text-align: right;
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}

/* Specific colors for different tasks to make calendar vibrant */
.color-0 { background-color: var(--accent); color: var(--accent); }
.color-1 { background-color: #03dac6; color: #03dac6; }
.color-2 { background-color: #ffb74d; color: #ffb74d; }
.color-3 { background-color: #64b5f6; color: #64b5f6; }
.color-4 { background-color: #81c784; color: #81c784; }
.color-5 { background-color: #e57373; color: #e57373; }
.color-6 { background-color: #ba68c8; color: #ba68c8; }
.color-7 { background-color: #4dd0e1; color: #4dd0e1; }

@media (max-width: 600px) {
    .button-grid {
        grid-template-columns: 1fr 1fr;
    }
    .manage-tasks {
        flex-direction: column;
    }
}