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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 20px;
    width: 100%;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 40px);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px 15px;
    background: #f8f9fa;
    border-radius: 10px;
    flex-wrap: wrap;
    gap: 15px;
}

.header-title {
    flex: 1;
    min-width: 200px;
}

h1 {
    color: #333;
    margin-bottom: 2px;
    font-size: 1.4em;
}

.subtitle {
    color: #666;
    font-size: 0.8em;
    margin: 0;
}

.nav-links {
    display: flex;
    gap: 10px;
    align-items: center;
}

.nav-links a {
    padding: 8px 16px;
    background: #e9ecef;
    color: #495057;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    font-size: 0.9em;
    white-space: nowrap;
}

.nav-links a:hover {
    background: #dee2e6;
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.nav-links a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.4);
}

.nav-links a.active:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.5);
}

.control-group {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 12px;
    border: 2px solid #e9ecef;
}

.sidebar .control-group {
    padding: 12px;
}

.control-group h3 {
    margin-bottom: 12px;
    color: #495057;
    font-size: 1em;
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 6px;
}

.size-inputs {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.input-wrapper {
    flex: 1;
}

.input-wrapper label {
    display: block;
    margin-bottom: 5px;
    color: #495057;
    font-weight: 500;
    font-size: 0.9em;
}

.input-wrapper input {
    width: 100%;
    padding: 10px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.input-wrapper input:focus {
    outline: none;
    border-color: #667eea;
}

.palette {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cell-type {
    padding: 10px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    font-weight: 600;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cell-type:hover {
    transform: translateX(-3px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.cell-type.active {
    border-color: #667eea;
    border-width: 3px;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.cell-type .code {
    font-size: 0.75em;
    color: #6c757d;
}

.road { background: #f8f9fa; color: #495057; }
.stone { background: #6c757d; color: white; }
.snow { background: #e3f2fd; color: #1976d2; }
.ice { background: #b3e5fc; color: #0277bd; }
.checkpoint { background: #fff3cd; color: #856404; border-color: #ffc107 !important; }
.start { background: #d4edda; color: #155724; border-color: #28a745 !important; }

.buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

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

.sidebar .buttons button {
    width: 100%;
}

button {
    flex: 1;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 120px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

button:active {
    transform: translateY(0);
}

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

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: #333;
}

.btn-warning {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: #333;
}

.btn-danger {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.main-content {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    flex: 1;
    min-height: 600px;
}

.canvas-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background: #f8f9fa;
    overflow: hidden;
    flex: 1;
    position: relative;
}

.sidebar {
    width: 280px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    flex-shrink: 0;
    overflow-y: auto;
    max-height: 100%;
    padding-right: 5px;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #555;
}

canvas {
    border: 2px solid #dee2e6;
    border-radius: 8px;
    cursor: crosshair;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    max-height: 100%;
}

.info {
    margin-top: 15px;
    padding: 12px;
    background: #e7f3ff;
    border-left: 4px solid #2196f3;
    border-radius: 8px;
    color: #0d47a1;
    font-size: 0.9em;
}

.info strong {
    display: block;
    margin-bottom: 5px;
}

#fileInput, #mapInput, #solutionInput {
    display: none;
}

.legend {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.sidebar .legend {
    grid-template-columns: 1fr;
    gap: 4px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    background: white;
    border-radius: 6px;
    font-size: 0.85em;
}

.legend-color {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 2px solid #dee2e6;
    flex-shrink: 0;
}

/* Стили для визуализатора */
.playback-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 15px;
}

.playback-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    background: #667eea;
    color: white;
    min-width: auto;
    width: 100%;
}

.playback-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.speed-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    background: white;
    border-radius: 6px;
}

.speed-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.speed-control input[type="range"] {
    width: 100%;
}

.speed-control input[type="range"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.speed-control label {
    font-size: 0.9em;
    font-weight: 600;
}

.speed-control #speedValue {
    font-size: 0.9em;
    font-weight: 600;
    color: #667eea;
}

.step-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 12px;
    background: white;
    border-radius: 8px;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.85em;
    color: #6c757d;
    margin-bottom: 5px;
}

.info-value {
    font-size: 1.1em;
    font-weight: 600;
    color: #333;
}

.hidden {
    display: none;
}

.visualization-panel {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 12px;
    border: 2px solid #dee2e6;
}

.visualization-panel h3 {
    margin-bottom: 10px;
    color: #495057;
    font-size: 1em;
}