/* Material 3 Expressive Tokens */
:root {
    --md-sys-color-background: #FDFDFB;
    --md-sys-color-surface: #FFFFFF;
    --md-sys-color-surface-container: #F0F4F4;
    --md-sys-color-primary: #006A6A;
    --md-sys-color-on-primary: #FFFFFF;
    --md-sys-color-secondary: #4A6363;
    --md-sys-color-outline: #707979;
    --md-sys-color-on-background: #191C1C;
    --md-sys-color-error: #BA1A1A;
    
    --border-radius-lg: 28px;
    --border-radius-md: 16px;
    --border-radius-sm: 8px;
    
    --elevation-1: 0px 1px 3px rgba(0,0,0,0.1), 0px 1px 2px rgba(0,0,0,0.06);
    --elevation-2: 0px 4px 6px rgba(0,0,0,0.05), 0px 2px 4px rgba(0,0,0,0.03);
}

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

body {
    font-family: 'Roboto', system-ui, sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    display: flex;
    justify-content: center;
    padding: 24px 16px;
    line-height: 1.5;
}

.app-container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.app-header {
    text-align: center;
    padding-top: 20px;
}

.badge-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.badge {
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 100px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-outline {
    background-color: transparent;
    border: 1px solid var(--md-sys-color-outline);
    color: var(--md-sys-color-primary);
}

.app-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--md-sys-color-primary);
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1rem;
    color: var(--md-sys-color-secondary);
}

/* Main Card */
.main-card {
    background-color: var(--md-sys-color-surface);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--elevation-2);
}

.input-container input {
    width: 100%;
    background-color: var(--md-sys-color-surface-container);
    border: none;
    padding: 20px 24px;
    font-size: 1rem;
    border-radius: var(--border-radius-md);
    color: var(--md-sys-color-on-background);
    outline: none;
    transition: background-color 0.2s;
    margin-bottom: 16px;
}

.input-container input:focus {
    background-color: #E2EAE9;
}

.btn-primary {
    width: 100%;
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    padding: 18px;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    transition: opacity 0.2s, transform 0.1s;
}

.btn-primary:active {
    transform: scale(0.98);
}

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

.icon {
    width: 20px;
    height: 20px;
}

/* Result Area */
.result-area {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--md-sys-color-surface-container);
    animation: fadeIn 0.3s ease-in-out;
}

.result-area.hidden {
    display: none;
}

.video-title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--md-sys-color-on-background);
    text-align: center;
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-tonal {
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-on-background);
    text-decoration: none;
    padding: 16px;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.2s;
}

.btn-tonal:hover {
    background-color: #E2EAE9;
}

.format-tag {
    background-color: var(--md-sys-color-primary);
    color: white;
    font-size: 0.7rem;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 700;
}

.audio-tag {
    background-color: var(--md-sys-color-secondary);
}

/* Developer Corner */
.dev-corner {
    background-color: var(--md-sys-color-surface-container);
    padding: 24px;
    border-radius: var(--border-radius-lg);
}

.dev-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--md-sys-color-secondary);
}

.dev-icon {
    width: 18px;
    height: 18px;
}

.dev-header h2 {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dev-content p {
    font-size: 0.85rem;
    color: #3F4948;
    margin-bottom: 12px;
}

.dev-content p:last-child {
    margin-bottom: 0;
}

.dev-content code {
    background-color: rgba(0,0,0,0.05);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: monospace;
    color: var(--md-sys-color-primary);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 24px 0;
    color: var(--md-sys-color-secondary);
    font-size: 0.9rem;
}

.app-footer strong {
    color: var(--md-sys-color-primary);
}

.branding {
    margin-top: 12px;
}

.termux-brand {
    display: inline-block;
    background-color: #191C1C;
    color: #FFFFFF;
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: monospace;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.status-text {
    text-align: center;
    font-weight: 500;
    color: var(--md-sys-color-secondary);
}