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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --success: #3fb950;
    --error: #f85149;
    --border: #30363d;
    --border-hover: #484f58;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

main {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px;
}

#uploadForm {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.file-input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.file-label {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.label-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.label-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}

input[type="file"] {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

input[type="file"]:hover {
    border-color: var(--border-hover);
}

input[type="file"]:focus {
    outline: none;
    border-color: var(--accent);
}

.file-name {
    font-size: 0.85rem;
    color: var(--accent);
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    opacity: 0;
    transition: opacity 0.2s;
}

.file-name.visible {
    opacity: 1;
}

.btn-primary {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    padding: 14px 32px;
    background: var(--accent);
    color: #0d1117;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    align-self: center;
    min-width: 150px;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.loader {
    text-align: center;
    padding: 40px 20px;
}

.loader.hidden {
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loader-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.results {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.results.hidden {
    display: none;
}

.results h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    transition: border-color 0.2s;
}

.stat-card:hover {
    border-color: var(--border-hover);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.download-section {
    text-align: center;
    margin-top: 30px;
}

.btn-download {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    padding: 14px 32px;
    background: var(--success);
    color: #0d1117;
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.2s, transform 0.1s;
}

.btn-download:hover {
    background: #56d364;
    transform: translateY(-1px);
}

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

.error {
    margin-top: 20px;
    padding: 16px;
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--error);
    border-radius: 6px;
    color: var(--error);
    font-size: 0.9rem;
}

.error.hidden {
    display: none;
}

/* Адаптивность */
@media (max-width: 768px) {
    .container {
        padding: 20px 10px;
    }

    main {
        padding: 25px 20px;
    }

    h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}