:root {
    --bg-color: #071821;
    --fg-color: #e0f8cf;
    --link-color: #86c06c;
    --border-color: #364750;
    --cell-active: #86c06c;
    --cell-inactive: #364750;
    --cell-disabled: #1a2a32;
    --status-success: #2e8b57;
    --status-error: #d62c2c;
    --status-loading: #d4a017;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Courier New', monospace;
}

body {
    background-color: var(--bg-color);
    color: var(--fg-color);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.5;
}

.container {
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
}

header {
    text-align: center;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

h1 {
    color: var(--fg-color);
    margin-bottom: 10px;
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.subtitle {
    color: var(--link-color);
    font-size: 1rem;
}

.grid-section {
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
}

.size-selector {
    margin-bottom: 15px;
    text-align: center;
}

.size-selector select {
    background-color: var(--bg-color);
    color: var(--fg-color);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
}

.size-selector select:focus {
    outline: none;
    border-color: var(--link-color);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    margin: 20px auto;
    max-width: 500px;
}

.cell {
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--cell-inactive);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.cell:hover {
    transform: scale(1.05);
    border-color: var(--link-color);
}

.cell.active {
    background-color: var(--cell-active);
    border-color: var(--cell-active);
}

.cell.disabled {
    background-color: var(--cell-disabled);
    cursor: not-allowed;
    opacity: 0.5;
}

.cell.active::after {
    content: "■";
    color: var(--bg-color);
    font-weight: bold;
    font-size: 1rem;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    justify-content: center;
}

.btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    flex: 1;
    min-width: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-color);
    color: var(--fg-color);
    text-transform: uppercase;
}

.btn:hover {
    transform: translateY(-2px);
    border-color: var(--link-color);
    color: var(--link-color);
}

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

.file-input {
    display: none;
}

.status {
    text-align: center;
    padding: 12px;
    margin-top: 20px;
    border-radius: 6px;
    font-weight: 500;
    border: 2px solid var(--border-color);
}

.status.loading {
    background-color: var(--bg-color);
    border-color: var(--status-loading);
    color: var(--status-loading);
}

.status.success {
    background-color: var(--bg-color);
    border-color: var(--status-success);
    color: var(--status-success);
}

.status.error {
    background-color: var(--bg-color);
    border-color: var(--status-error);
    color: var(--status-error);
}

.instructions {
    background-color: var(--bg-color);
    border-left: 4px solid var(--link-color);
    padding: 15px;
    border-radius: 0 6px 6px 0;
    margin: 20px 0;
    border: 1px solid var(--border-color);
}

.instructions h3 {
    color: var(--link-color);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

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

.instructions li {
    margin-bottom: 8px;
    font-size: 0.9rem;
}

footer {
    text-align: center;
    margin-top: 30px;
    color: var(--border-color);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .grid-container {
        gap: 3px;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

.language-selector {
    margin-top: 10px;
}

.language-selector select {
    background-color: var(--bg-color);
    color: var(--fg-color);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 10px;
    font-family: 'Courier New', monospace;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.language-selector select:focus {
    outline: none;
    border-color: var(--link-color);
}

.nonogram-container {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    gap: 5px;
    margin: 0 auto;
    max-width: 550px;
}

/* Hint Container Sizing with fixed positioning */
.hint-container {
    display: flex;
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: 5px;
    overflow: hidden;
}

.column-hints {
    grid-column: 2;
    grid-row: 1;
    flex-direction: row;
    justify-content: flex-start; /* Changed from space-around */
    margin-bottom: 5px;
    height: 100px;
    gap: 4px; /* Match grid gap */
}

.row-hints {
    grid-column: 1;
    grid-row: 2;
    flex-direction: column;
    justify-content: flex-start; /* Changed from space-around */
    margin-right: 5px;
    width: 100px;
    gap: 4px; /* Match grid gap */
}

.hint-cell {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-width: 40px;
    min-height: 40px;
    padding: 2px;
    box-sizing: border-box;
}

/* Column hint cells - fixed positioning */
.column-hints .hint-cell {
    height: 100%;
    align-items: center;
    justify-content: flex-end;
}

/* Row hint cells - fixed positioning */
.row-hints .hint-cell {
    width: 100%;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
}

.hint-number {
    color: var(--fg-color);
    font-size: 0.8rem;
    margin: 1px;
    text-align: center;
    min-width: 15px;
    line-height: 1;
}

/* Add invisible placeholder cells for smaller grids */
.hint-cell.placeholder {
    visibility: hidden;
}

.grid-container {
    grid-column: 2;
    grid-row: 2;
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    margin: 0;
}