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

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: #f5f7fa;
    color: #1e4b69;
    min-height: 100vh;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 20px;
}

h1 {
    text-align: center;
    color: #1e4b69;
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    font-size: 0.88rem;
    margin-bottom: 24px;
}

.matrix-wrapper {
    position: relative;
    padding-left: 48px;
    padding-bottom: 48px;
}

.y-axis-label {
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    font-size: 0.8rem;
    font-weight: 700;
    color: #6b7280;
    white-space: nowrap;
}

.y-axis-markers {
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: 0.72rem;
    color: #9ca3af;
    font-weight: 600;
    padding: 12px 0;
}

.x-axis-label {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: #6b7280;
    margin-top: 6px;
}

.x-axis-markers {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: #9ca3af;
    font-weight: 600;
    padding: 4px 12px 0;
}

.matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 4px;
    aspect-ratio: 1;
    max-height: 480px;
}

.quadrant {
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.quadrant:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    z-index: 2;
}

.q-top-left {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    border: 2px solid #fca5a5;
}

.q-top-right {
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    border: 2px solid #c4b5fd;
}

.q-bottom-left {
    background: linear-gradient(135deg, #f9fafb, #f3f4f6);
    border: 2px solid #d1d5db;
}

.q-bottom-right {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    border: 2px solid #86efac;
}

.quadrant-label {
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.q-top-left .quadrant-label { color: #dc2626; }
.q-top-right .quadrant-label { color: #7c3aed; }
.q-bottom-left .quadrant-label { color: #6b7280; }
.q-bottom-right .quadrant-label { color: #16a34a; }

.quadrant-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    flex: 1;
    align-content: flex-start;
}

.task-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.task-dot:hover {
    transform: scale(1.3);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.q-top-left .task-dot { background: #ef4444; }
.q-top-right .task-dot { background: #7c3aed; }
.q-bottom-left .task-dot { background: #9ca3af; }
.q-bottom-right .task-dot { background: #22c55e; }

.task-panel {
    display: none;
    background: #fff;
    border-radius: 12px;
    border: 2px solid #1e4b69;
    padding: 18px 40px 18px 18px;
    margin-top: 20px;
    position: relative;
    animation: fadeIn 0.3s ease;
}

.task-panel.visible {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.task-panel h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.task-panel ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.task-panel li {
    padding: 8px 12px;
    background: #f5f7fa;
    border-radius: 6px;
    font-size: 0.88rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-panel li .time-save {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 14px;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: #9ca3af;
    cursor: pointer;
}

.close-btn:hover {
    color: #1e4b69;
}

.tooltip {
    display: none;
    position: fixed;
    background: #1e293b;
    color: #fff;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    line-height: 1.4;
    max-width: 250px;
    z-index: 1000;
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

@media (max-width: 500px) {
    .container {
        padding: 16px 12px;
    }

    .matrix-wrapper {
        padding-left: 36px;
    }

    .quadrant {
        padding: 10px;
    }

    .quadrant-label {
        font-size: 0.78rem;
    }

    .task-dot {
        width: 26px;
        height: 26px;
        font-size: 0.5rem;
    }
}