/* Base styles and variables */
:root {
    --primary-accent: #19c0ff;
    --background: #ffffff;
    --text-dark: #1a1a1a;
    --text-muted: #6c757d;
    --border-color: #e9ecef;
    --border-radius: 8px;

    /* Quadrant colors */
    --box1-color: #ff6b6b;
    --box1-bg: #fff5f5;
    --box2-color: #51cf66;
    --box2-bg: #f0fff4;
    --box3-color: #fcc419;
    --box3-bg: #fffbeb;
    --box4-color: #868e96;
    --box4-bg: #f8f9fa;

    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background: var(--background);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Input Section */
.input-section {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.task-form {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-stack);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(25, 192, 255, 0.15);
}

.ratings-row {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.rating-group {
    flex: 1;
    min-width: 200px;
}

.rating-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Star Rating */
.star-rating {
    display: flex;
    gap: 0.25rem;
}

.star {
    background: none;
    border: none;
    font-size: 1.75rem;
    color: var(--border-color);
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.15s, transform 0.15s;
    line-height: 1;
}

.star:hover {
    transform: scale(1.1);
}

.star.active,
.star.hover {
    color: #ffc107;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-stack);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: #0db0ef;
    border-color: #0db0ef;
}

.btn-secondary {
    background: var(--text-dark);
    color: white;
    border-color: var(--text-dark);
}

.btn-secondary:hover:not(:disabled) {
    background: #333;
    border-color: #333;
}

.btn-outline {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border-color);
}

.btn-outline:hover:not(:disabled) {
    background: var(--border-color);
    color: var(--text-dark);
}

/* Task List */
.task-list-container {
    margin-bottom: 1.5rem;
}

.task-list-container h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.task-list {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
}

.task-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
}

.task-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.task-name {
    font-weight: 500;
}

.task-ratings {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.task-ratings .stars {
    color: #ffc107;
    letter-spacing: -2px;
}

.delete-task {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.25rem;
    line-height: 1;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.delete-task:hover {
    color: var(--box1-color);
    background: rgba(255, 107, 107, 0.1);
}

.empty-message {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 1rem;
}

.empty-message.hidden {
    display: none;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Test Section */
.test-section {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-bottom: 2rem;
}

.test-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.test-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.test-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.btn-test {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-test:hover {
    background: var(--primary-accent);
    color: white;
    border-color: var(--primary-accent);
}

.btn-test.active {
    background: var(--primary-accent);
    color: white;
    border-color: var(--primary-accent);
}

/* Matrix Section Common */
.matrix-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #fafafa;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.approach-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.approach-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Shared quadrant styles */
.quadrant-label {
    font-weight: 700;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.5rem;
}

.quadrant-tasks {
    list-style: none;
    font-size: 0.8rem;
}

.quadrant-tasks li {
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.quadrant-tasks li:last-child {
    border-bottom: none;
}

/* =====================================================
   CORNER-ANCHORED EXPANSION
   ===================================================== */
.corner-container {
    position: relative;
    height: 400px;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.corner-quadrant {
    position: absolute;
    padding: 0.75rem;
    transition: all 0.5s ease-out;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border-radius: var(--border-radius);
}

/* Q1: Top-left */
.corner-q1 {
    background: var(--box1-bg);
    border: 2px solid var(--box1-color);
    top: 0;
    left: 0;
    align-items: flex-start;
    justify-content: flex-start;
}
.corner-q1 .quadrant-label { color: var(--box1-color); }

/* Q2: Top-right */
.corner-q2 {
    background: var(--box2-bg);
    border: 2px solid var(--box2-color);
    top: 0;
    right: 0;
    align-items: flex-end;
    justify-content: flex-start;
    text-align: right;
}
.corner-q2 .quadrant-label { color: var(--box2-color); }
.corner-q2 .quadrant-tasks { text-align: right; }

/* Q3: Bottom-left */
.corner-q3 {
    background: var(--box3-bg);
    border: 2px solid var(--box3-color);
    bottom: 0;
    left: 0;
    align-items: flex-start;
    justify-content: flex-end;
}
.corner-q3 .quadrant-label {
    color: #e6a700;
    order: 2;
}
.corner-q3 .quadrant-tasks { order: 1; }

/* Q4: Bottom-right */
.corner-q4 {
    background: var(--box4-bg);
    border: 2px solid var(--box4-color);
    bottom: 0;
    right: 0;
    align-items: flex-end;
    justify-content: flex-end;
    text-align: right;
}
.corner-q4 .quadrant-label {
    color: var(--box4-color);
    order: 2;
}
.corner-q4 .quadrant-tasks {
    order: 1;
    text-align: right;
}

/* Default corner sizes */
.corner-q1, .corner-q2, .corner-q3, .corner-q4 {
    width: 48%;
    height: 48%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* =====================================================
   BUBBLE VIEW - Grid-based with larger bubbles
   ===================================================== */
.bubbles-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 0.25rem;
    height: 400px;
    padding: 0.25rem;
    background: white;
    border-radius: var(--border-radius);
    place-items: center;
}

.bubble {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.5s ease-out;
    padding: 1rem;
    text-align: center;
    width: 190px;
    height: 150px;
    overflow: hidden;
}

.bubble-1 {
    background: var(--box1-bg);
    border: 3px solid var(--box1-color);
}

.bubble-2 {
    background: var(--box2-bg);
    border: 3px solid var(--box2-color);
}

.bubble-3 {
    background: var(--box3-bg);
    border: 3px solid var(--box3-color);
}

.bubble-4 {
    background: var(--box4-bg);
    border: 3px solid var(--box4-color);
}

.bubble-label {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.35rem;
}

.bubble-1 .bubble-label { color: var(--box1-color); }
.bubble-2 .bubble-label { color: var(--box2-color); }
.bubble-3 .bubble-label { color: #e6a700; }
.bubble-4 .bubble-label { color: var(--box4-color); }

.bubble-tasks {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.75rem;
    max-height: 80px;
    overflow-y: auto;
    width: 100%;
}

.bubble-task {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .ratings-row {
        flex-direction: column;
        gap: 1rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .corner-container,
    .bubbles-container {
        height: 300px;
    }

    .test-buttons {
        flex-direction: column;
    }

    .btn-test {
        width: 100%;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.task-list li {
    animation: fadeIn 0.3s ease;
}