* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1a2a3a 0%, #0d1824 100%);
    color: #e0e0e0;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(0, 30, 60, 0.7);
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

h1 {
    color: #4dabf7;
    margin-bottom: 10px;
    font-size: 2.5rem;
}

.subtitle {
    color: #a5d8ff;
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.5;
}

.main-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.left-panel {
    flex: 1;
    min-width: 300px;
    background: rgba(20, 40, 60, 0.8);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.image-container {
    flex: 2;
    min-width: 500px;
    background: rgba(10, 25, 40, 0.9);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.panel-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: #74c0fc;
    border-bottom: 2px solid #339af0;
    padding-bottom: 10px;
}

.control-group {
    margin-bottom: 25px;
}

.control-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #a5d8ff;
}

.file-upload {
    width: 100%;
    padding: 12px;
    background: rgba(30, 60, 90, 0.7);
    border: 2px dashed #339af0;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload:hover {
    background: rgba(40, 80, 120, 0.8);
    border-color: #4dabf7;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(to right, #339af0, #228be6);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
    width: 100%;
}

.btn:hover {
    background: linear-gradient(to right, #4dabf7, #339af0);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-grid {
    background: linear-gradient(to right, #667eea, #764ba2);
}

.btn-grid:hover:not(:disabled) {
    background: linear-gradient(to right, #764ba2, #667eea);
}

.btn-download {
    background: linear-gradient(to right, #40c057, #2f9e44);
}

.btn-download:hover:not(:disabled) {
    background: linear-gradient(to right, #51cf66, #40c057);
}

.btn-reset {
    background: linear-gradient(to right, #fa5252, #e03131);
}

.btn-reset:hover {
    background: linear-gradient(to right, #ff6b6b, #fa5252);
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    height: 500px;
    border: 2px solid #339af0;
    border-radius: 10px;
    overflow: hidden;
    background: #0a1929;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: none;
}
/* Custom crosshair cursor that inverts colors */
.canvas-wrapper::before {
    content: '';
    position: fixed;
    left: var(--cursor-x, -100px);
    top: var(--cursor-y, -100px);
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    mix-blend-mode: difference;
    opacity: 0;
}
.canvas-wrapper:hover::before {
    opacity: 1;
}

canvas {
    position: absolute;
    cursor: crosshair;
}

#sourceCanvas {
    z-index: 1;
    pointer-events: none;
}

#gridCanvas {
    z-index: 2;
    pointer-events: none;
}

#pointsCanvas {
    z-index: 3;
    pointer-events: all;
}

.instructions {
    background: rgba(30, 60, 90, 0.7);
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.instructions h3 {
    color: #74c0fc;
    margin-bottom: 10px;
}

.instructions ul {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 8px;
}

.point-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.point-btn {
    flex: 1;
    min-width: 120px;
    padding: 10px;
    background: rgba(30, 60, 90, 0.7);
    border: 1px solid #339af0;
    border-radius: 8px;
    color: #a5d8ff;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.point-btn:hover {
    background: rgba(40, 80, 120, 0.9);
    border-color: #4dabf7;
}

.point-btn.active {
    background: #339af0;
    color: white;
    font-weight: bold;
}

.point-counter {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    padding: 10px;
    background: rgba(30, 60, 90, 0.5);
    border-radius: 8px;
}

.status {
    text-align: center;
    padding: 15px;
    background: rgba(30, 60, 90, 0.7);
    border-radius: 10px;
    margin-top: 20px;
    font-weight: 600;
    color: #a5d8ff;
    min-height: 52px;
}

.status.success {
    background: rgba(64, 192, 87, 0.2);
    color: #69db7c;
}

.status.error {
    background: rgba(250, 82, 82, 0.2);
    color: #ff8787;
}

footer {
    text-align: center;
    padding: 20px;
    color: #a5d8ff;
    font-size: 0.9rem;
    border-top: 1px solid rgba(51, 154, 240, 0.3);
    margin-top: 20px;
}

@media (max-width: 1100px) {
    .main-content {
        flex-direction: column;
    }
    
    .image-container, .left-panel {
        min-width: 100%;
    }
}

.btn-print {
    background: linear-gradient(to right, #5c7cfa, #4c6ef5);
    color: white;
}

.btn-print:hover {
    background: linear-gradient(to right, #4c6ef5, #3b5bdb);
    transform: translateY(-2px);
}

.faq .instructions p{
    padding-left: 10px;
}
.faq .instructions summary{
    padding-left: 10px;
    text-rendering: optimizeLegibility;
    text-transform: none;
    text-wrap: contain;
}