@font-face {
    font-family: 'TikTok Sans Light';
    src: url('font.woff2') format('woff2');
    font-display: swap;
}

:root {
    --primary: #fe2c55;
    --secondary: #25f4ee;
    --background: #000000;
    --text: #ffffff;
    --text-secondary: #afafaf;
    --border: #111111;
    --card: #0a0a0a;
    --input: #0a0a0a;

    --fs-h1: 3rem;
    --fs-h2: 2rem;
    --fs-h3: 1.25rem;
    --fs-h4: 1.125rem;
    --fs-p: 1rem;

    --space-sm: 10px;
    --space-md: 20px;
    --space-lg: 40px;
    --space-xl: 80px;

    --border-radius: 5px;
    --line-height: 1.5;
}

body.light-mode {
    --primary: #fe2c55;
    --secondary: #25f4ee;
    --background: #ffffff;
    --text: #000000;
    --text-secondary: #505050;
    --border: #eeeeee;
    --card: #fafafa;
    --input: #fafafa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'TikTok Sans Light', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: var(--line-height);
    font-size: var(--fs-p);
    color: inherit;
}

a,
button,
input,
select,
textarea {
    color: inherit;
}

.theme-toggle,
.input-group,
.paste-button,
.download-button,
.results-panel,
.option,
.format-badge,
.feature-card,
.accordion-item,
.language-select {
    border-radius: var(--border-radius);
}

.theme-toggle,
.input-group,
.results-panel,
.option,
.feature-card,
.accordion-item,
.language-select {
    border: 1px solid var(--border);
}

.logo,
.section-heading,
.feature-card h3 {
    font-weight: 800;
}

.download-button,
.video-title,
.option-label,
.option.hd,
.accordion-trigger,
.accordion-trigger h4 {
    font-weight: 600;
}

.hero-title,
.results-header,
.section-heading,
.feature-card h3 {
    margin-bottom: var(--space-md);
}

.hero-subtitle,
.section-subheading {
    margin-bottom: var(--space-xl);
}

.theme-toggle,
.paste-button,
.download-button,
.option,
.accordion-trigger,
.language-select {
    cursor: pointer;
}

.hero-subtitle,
.video-icon,
.paste-button,
.section-subheading,
.feature-card p,
.accordion-icon,
.accordion-content p,
.copyright,
.affiliation {
    color: var(--text-secondary);
}

.application,
main,
.hero,
.results-header,
.options,
.footer-content,
.accordion {
    display: flex;
    flex-direction: column;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--border-radius);
}

body {
    background-color: var(--background);
    color: var(--text);
    overflow-x: hidden;
}

.application {
    min-height: 100vh;
    position: relative;
}

.navbar,
main,
.footer-content {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
}

.theme-toggle,
.video-icon,
.paste-button,
.accordion-icon,
[data-icon] {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero,
.section-heading,
.section-subheading {
    text-align: center;
}

.format-badge {
    color: var(--text-secondary);
    font-weight: 700;
    font-family: monospace;
    padding: 4px var(--space-sm);
}

.theme-toggle svg,
.video-icon svg,
.paste-button svg,
.accordion-icon svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
}

header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 100;
    background-color: var(--background);
    border-bottom: 1px solid var(--border);
}

.navbar {
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.theme-toggle {
    background: transparent;
    width: var(--space-lg);
    height: var(--space-lg);
}

main {
    padding: var(--space-xl) var(--space-lg);
    flex-grow: 1;
    gap: var(--space-xl);
}

.hero {
    align-items: center;
}

.hero-title {
    font-size: var(--fs-h1);
    font-weight: 900;
    max-width: 800px;
}

.console {
    width: 100%;
    max-width: 580px;
}

.input-glow {
    width: 100%;
    position: relative;
}

.input-group {
    flex-grow: 1;
    display: flex;
    align-items: center;
    background: var(--input);
    padding: var(--space-sm) var(--space-md);
}

.input-group:focus-within {
    border-color: var(--text);
}

.input-group.error-border {
    border-color: var(--primary) !important;
}

.video-icon {
    margin-right: var(--space-sm);
}

#video-url {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
}

#video-url::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.paste-button {
    background: transparent;
    border: none;
    padding: var(--space-sm);
    margin-right: var(--space-sm);
}

.download-button {
    padding: 10px var(--space-lg);
    color: var(--background);
    background-color: var(--text);
    border: 1px solid var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    white-space: nowrap;
}

.download-button:disabled {
    background-color: var(--border);
    border-color: var(--border);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.download-button.loading {
    color: transparent !important;
}

.download-button.loading-spinner::after {
    content: '' !important;
    position: absolute !important;
    width: var(--space-md) !important;
    height: var(--space-md) !important;
    top: calc(50% - var(--space-sm)) !important;
    left: calc(50% - var(--space-sm)) !important;
    border: 2px solid var(--border) !important;
    border-top-color: var(--text) !important;
    border-radius: 50% !important;
    z-index: 2 !important;
}

.results-panel {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--card);
    text-align: left;
}

.results-panel.hidden {
    display: none !important;
}

.results-header {
    gap: var(--space-sm);
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-md);
}

.video-title {
    word-break: break-word;
}

.options {
    gap: var(--space-sm);
}

.option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    text-decoration: none;
    background: var(--input);
}

.format-badge {
    background-color: var(--border);
}

.option.hd {
    background-color: var(--text);
    color: var(--background);
    border-color: var(--text);
}

.section-heading {
    font-size: var(--fs-h2);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    background: var(--card);
    padding: var(--space-lg) var(--space-md);
}

.feature-card h3 {
    font-size: var(--fs-h3);
}

.accordion {
    margin: 0 auto;
    width: 100%;
    gap: var(--space-sm);
}

.accordion-item {
    background: var(--card);
    overflow: hidden;
}

.accordion-trigger {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
}

.accordion-trigger h4 {
    font-size: var(--fs-h4);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
}

.accordion-content p {
    padding: 0 var(--space-lg) var(--space-md) var(--space-lg);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-item.active .accordion-content {
    max-height: 160px;
}

footer {
    border-top: 1px solid var(--border);
    padding: var(--space-md);
}

.footer-content {
    align-items: center;
    text-align: center;
    gap: var(--space-md);
}

.copyright {
    max-width: 800px;
    font-weight: 400 !important;
}

p.affiliation {
    color: var(--text);
    font-weight: 500;
}

.language-selector {
    display: flex;
    justify-content: center;
}

.language-select {
    background: transparent;
    height: var(--space-lg);
    padding: 0 var(--space-sm);
    outline: none;
    font-weight: 500;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    text-align: center;
    text-align-last: center;
}

.language-select option {
    background-color: var(--background);
    color: var(--text);
}

@media (max-width: 991px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--fs-h2);
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    main {
        gap: var(--space-xl);
        padding: var(--space-xl) var(--space-md);
    }
}

@media (max-width: 480px) {
    .input-group {
        padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-md);
    }
    .video-icon {
        display: none;
    }
    .download-button {
        padding: 10px var(--space-md);
    }
}