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

:root {
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #0f3460;
    --color-highlight: #e94560;
    --color-success: #00d4ff;
    --color-text: #eaeaea;
    --color-text-secondary: #b0b0b0;
    --color-border: #2d3561;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-primary);
    color: var(--color-text);
    line-height: 1.6;
    letter-spacing: 0.3px;
}

/* Focus styles for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-highlight);
    outline-offset: 2px;
}

/* Container */
.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-highlight);
}

.header-content {
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    letter-spacing: 1px;
}

.header .subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    font-weight: 300;
}

/* Main Content */
.main-content {
    flex: 1;
}

/* Input Section */
.input-section {
    margin-bottom: var(--spacing-xl);
}

.input-container {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.input-container label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.input-wrapper input {
    flex: 1;
    min-width: 250px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font-size: 1rem;
    transition: var(--transition);
}

.input-wrapper input:focus {
    border-color: var(--color-highlight);
    background-color: rgba(0, 212, 255, 0.05);
}

.input-wrapper input::placeholder {
    color: var(--color-text-secondary);
}

.input-wrapper button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-highlight);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 150px;
}

.input-wrapper button:hover {
    background-color: #ff5577;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
}

.input-wrapper button:active {
    transform: translateY(0);
}

.help-text {
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Loading State */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.loading.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-highlight);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

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

/* Error Message */
.error {
    background-color: rgba(233, 69, 96, 0.1);
    border-left: 4px solid var(--color-highlight);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    color: #ff8a9b;
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.error.hidden {
    display: none;
}

/* Release Section */
.release-section {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

/* Back Button Container */
.back-button-container {
    margin-bottom: var(--spacing-lg);
}

.back-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.95rem;
}

.back-button:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-highlight);
    color: var(--color-highlight);
}

.back-button:active {
    transform: translateY(1px);
}

/* Release Section */

.release-section.hidden {
    display: none;
}

.release-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.release-section h2 {
    font-size: 2rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.release-date {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.repository-info {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
}

/* Files Container */
.files-container h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.files-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.file-item {
    background-color: var(--color-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.file-item:hover {
    border-color: var(--color-highlight);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.2);
    transform: translateY(-2px);
}

.file-name {
    font-weight: 600;
    color: var(--color-text);
    word-break: break-word;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.file-extension {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-highlight);
    padding: 0.25rem var(--spacing-sm);
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    width: fit-content;
}

.file-size {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.download-btn {
    background-color: var(--color-success);
    color: var(--color-primary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    margin-top: auto;
}

.download-btn:hover {
    background-color: #00f5ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

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

/* View on GitHub Link */
.view-github {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.view-github a {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-accent);
    color: var(--color-highlight);
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-highlight);
    transition: var(--transition);
    font-weight: 600;
}

.view-github a:hover {
    background-color: var(--color-highlight);
    color: white;
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}

.footer-content {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .header .subtitle {
        font-size: 1rem;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .input-wrapper input {
        min-width: 100%;
    }

    .input-wrapper button {
        width: 100%;
        min-width: unset;
    }

    .files-list {
        grid-template-columns: 1fr;
    }

    .release-section h2 {
        font-size: 1.5rem;
    }

    .about-section {
        padding: var(--spacing-md);
    }

    .input-container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .header {
        padding: var(--spacing-lg) var(--spacing-sm);
        margin-bottom: var(--spacing-lg);
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.95rem;
    }

    .about-section h2,
    .release-section h2 {
        font-size: 1.3rem;
    }
}

/* Skip to main content link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background-color: var(--color-highlight);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 100;
    border-radius: var(--border-radius);
}

.skip-link:focus {
    top: 0;
}
/* Dialog Styles */
dialog {
    border: none;
    border-radius: var(--border-radius);
    padding: 0;
    background-color: transparent;
    max-width: 100%;
    max-height: 100%;
}

dialog::backdrop {
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(2px);
}

dialog[open] {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.filter-dialog {
    width: 100%;
}

.dialog-content {
    background-color: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.dialog-content h2 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.dialog-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

/* Filter Options */
.filter-options {
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.option-label {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.option-label:hover {
    background-color: var(--color-accent);
    border-color: var(--color-highlight);
}

.option-label input[type="radio"] {
    margin-right: var(--spacing-md);
    margin-top: 4px;
    cursor: pointer;
    accent-color: var(--color-highlight);
}

.option-label input[type="radio"]:focus {
    outline: 2px solid var(--color-highlight);
    outline-offset: 2px;
}

.option-label span {
    display: block;
}

.option-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.option-description {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Custom Extension Container */
.custom-extension-container {
    background-color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    animation: slideDown 0.3s ease-out;
}

.custom-extension-container.hidden {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 1000px;
    }
}

.extension-label {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.extension-help {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.suggested-extensions {
    margin-bottom: var(--spacing-md);
}

.suggested-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.extension-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.extension-chip {
    background-color: var(--color-accent);
    color: var(--color-text);
    border: 1px solid var(--color-highlight);
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
    font-weight: 500;
}

.extension-chip:hover {
    background-color: var(--color-highlight);
    transform: translateY(-2px);
}

.extension-chip:active {
    transform: translateY(0);
}

.extension-chip:focus {
    outline: 2px solid var(--color-highlight);
    outline-offset: 2px;
}

.extension-input {
    width: 100%;
    background-color: var(--color-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    font-size: 1rem;
    transition: var(--transition);
}

.extension-input:focus {
    outline: none;
    border-color: var(--color-highlight);
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.2);
}

.extension-input::placeholder {
    color: var(--color-text-secondary);
}

/* Dialog Actions */
.dialog-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.btn-primary,
.btn-secondary {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--color-highlight);
    color: white;
}

.btn-primary:hover {
    background-color: #ff5577;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background-color: var(--color-accent);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-highlight);
}

/* Responsive */
@media (max-width: 600px) {
    .dialog-content {
        margin: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .dialog-content h2 {
        font-size: 1.25rem;
    }

    .dialog-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }

    .extension-buttons {
        gap: 6px;
    }

    .extension-chip {
        padding: 4px 8px;
        font-size: 0.8rem;
    }
}