:root {
    --bg-page: hsl(0, 0%, 9%);
    --bg-content: hsl(0, 0%, 12%);
    --bg-content-alt: hsl(0, 0%, 11%);
    --bg-content-highlight: hsl(0, 0%, 19%);
    --bg-accent: hsl(14, 3%, 14%);

    --text-primary: hsl(0, 0%, 99%);
    --text-dim: hsl(213, 6%, 63%);
    --text-muted: hsl(0, 0%, 43%);

    --border-color: hsl(0, 0%, 15%);

    --link-hover: hsl(264, 95%, 85%);

    --btn-primary-bg: hsl(264, 100%, 60%);
    --btn-primary-text: hsl(0, 0%, 96%);
    --btn-cta-bg: hsl(231, 48%, 48%);
    --btn-secondary-bg: hsl(0, 0%, 25%);

    --error-bg: hsl(6, 21%, 19%);
    --error-text: hsl(7, 100%, 67%);

    --success-bg: hsl(145, 63%, 15%);
    --success-text: hsl(145, 55%, 65%);

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

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

html, body {
    font-family: var(--font-family);
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-size: 16px;
}

#app {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}


h3 {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 2rem;
    text-align: center;
}

p {
    color: var(--text-dim);
    line-height: 1.6;
}

.converter-panel {
    background-color: var(--bg-content);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.5rem;
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.file-input-label {
    display: block;
    padding: 1rem;
    border: 2px dashed var(--border-color);
    border-radius: 6px;
    text-align: center;
    color: var(--text-dim);
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.file-input-label:hover {
    background-color: var(--bg-content-highlight);
    border-color: var(--btn-primary-bg);
}

.file-input-label span {
    pointer-events: none;
}

input[type="file"] {
    display: none;
}

.result-card {
    background-color: var(--bg-content-alt);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.file-info {
    flex-grow: 1;
    overflow: hidden;
}

.file-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.result-card .file-name {
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-all;
}

.result-card .file-size {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.button-group {
    display: flex;
    gap: 1rem;
}

.button-group > .btn {
    flex-grow: 1;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    background-color: var(--btn-cta-bg);
    color: var(--btn-primary-text);
}

.btn:hover:not(:disabled) {
    background-color: hsl(231, 48%, 53%);
    transform: translateY(-2px);
}

.btn:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
    color: var(--text-dim);
}

.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--text-dim);
}

.btn-secondary:hover:not(:disabled) {
    background-color: hsl(0, 0%, 30%);
    color: var(--text-primary);
}

.btn-convert-single {
    background-color: var(--btn-secondary-bg);
    color: var(--text-dim);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-convert-single:hover:not(:disabled) {
    background-color: hsl(0, 0%, 30%);
    color: var(--text-primary);
    border-color: hsl(0, 0%, 40%);
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.75rem;
    line-height: 1;
    padding: 0 0.25rem;
    transition: color 0.2s ease;
}

.btn-remove:hover {
    color: var(--text-primary);
}

.btn-remove:disabled {
    color: var(--text-muted);
    cursor: not-allowed;
}

.alert-error {
    background-color: var(--error-bg);
    color: var(--error-text);
    padding: 1rem 1.5rem;
    border-radius: 6px;
    border: 1px solid hsl(7, 100%, 50%, 0.5);
    text-align: left;
    font-weight: 500;
    overflow-wrap: break-word;
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    border: 1px solid hsl(145, 63%, 30%);
    font-weight: 500;
}

.results-summary {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

.loading-indicator {
    color: var(--text-dim);
}

#blazor-error-ui {
    background: var(--error-bg);
    color: var(--error-text);
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: none;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}