:root {
    --bg-color: #fffbeb;
    --header-text-color: #ea580c;
    --description-bg-color: rgba(254, 243, 199, .7);
    --description-text-color: rgba(113, 63, 18, .9);
    --lyrics-title-color: #f97316;
    --lyrics-text-color: #78350f;
    --btn-active-bg: #f97316;
    --btn-active-text: #fff;
    --btn-inactive-bg: #fff;
    --btn-inactive-text: #f97316;
    --btn-inactive-hover-bg: #ffedd5;
    --btn-active-shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)
}

.theme-bright {
    --bg-color: #fffbeb;
    --header-text-color: #ea580c;
    --description-bg-color: rgba(254, 243, 199, .7);
    --description-text-color: rgba(113, 63, 18, .9);
    --lyrics-title-color: #f97316;
    --lyrics-text-color: #78350f;
    --btn-active-bg: #f97316;
    --btn-active-text: #fff;
    --btn-inactive-bg: #fff;
    --btn-inactive-text: #f97316;
    --btn-inactive-hover-bg: #ffedd5
}

.theme-cute {
    --bg-color: #ffeaec;
    --header-text-color: #f472b6;
    --description-bg-color: rgba(255, 228, 230, .7);
    --description-text-color: rgba(102, 11, 48, 0.9);
    --lyrics-title-color: #f472b6;
    --lyrics-text-color: #831843;
    --btn-active-bg: #f472b6;
    --btn-active-text: #fff;
    --btn-inactive-bg: #fff;
    --btn-inactive-text: #f472b6;
    --btn-inactive-hover-bg: #fce7f3
}

.theme-calm {
    --bg-color: #ecfeff;
    --header-text-color: #0d9488;
    --description-bg-color: rgba(207, 250, 254, .7);
    --description-text-color: rgba(20, 83, 45, .9);
    --lyrics-title-color: #14b8a6;
    --lyrics-text-color: #164e63;
    --btn-active-bg: #14b8a6;
    --btn-active-text: #fff;
    --btn-inactive-bg: #fff;
    --btn-inactive-text: #14b8a6;
    --btn-inactive-hover-bg: #ccfbf1
}

.theme-pastel {
    --bg-color: #f8fafc;
    --header-text-color: #4f46e5;
    --description-bg-color: rgba(207, 250, 254, .7);
    --description-text-color: rgba(20, 83, 45, .9);
    --lyrics-title-color: #f43f5e;
    --lyrics-text-color: #334155;
    --btn-active-bg: linear-gradient(to right, #4f46e5, #f43f5e);
    --btn-active-text: #fff;
    --btn-inactive-bg: #fff;
    --btn-inactive-text: #4f46e5;
    --btn-inactive-hover-bg: #e0e7ff
}

body {
    font-family: 'Mali', 'sans-serif';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: #374151;
    margin: 0
}

.page-container {
    min-height: 100vh;
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    transition: background-color .3s ease-in-out
}

.main-content {
    max-width: 896px;
    margin-left: auto;
    margin-right: auto;
    background-color: #fff;
    border-radius: 1.5rem;
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);
    overflow: hidden
}

.content-wrapper {
    padding: 1rem
}

.footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: .875rem;
    color: #6b7280
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    color: var(--header-text-color);
    transition: color .3s ease-in-out
}

.youtube-embed {
    aspect-ratio: 16/9;
    width: 100%
}

.youtube-embed iframe {
    width: 100%;
    height: 100%;
    border-radius: .5rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)
}

.description-section p {
    font-size: 1rem;
    line-height: 1.75;
    text-align: left;
    padding: 1rem;
    border-radius: .5rem;
    background-color: #fff6feb3;
    color: var(--description-text-color);
    transition: color .3s ease-in-out, background-color .3s ease-in-out
}

.lyrics-section {
    text-align: center
}

.lyrics-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--lyrics-title-color);
    transition: color .3s ease-in-out
}

.lyrics-section-lines {
    font-size: 1rem;
    line-height: 2;
    color: var(--lyrics-text-color);
    transition: color .3s ease-in-out
}

.lyrics-section-lines p {
    font-size: 1rem;
    margin-bottom: .5rem
}

@media (min-width:640px) {
    .page-container {
        padding: 1rem 1.5rem
    }

    .content-wrapper {
        padding: 2rem
    }

    .page-header h1 {
        font-size: 2.25rem
    }

    .description-section p {
        font-size: 1rem
    }

    .lyrics-section h2 {
        font-size: 1.875rem
    }

    .lyrics-section-lines {
        font-size: 1rem
    }
}

@media (min-width:1024px) {
    .page-container {
        padding: 1rem 2rem
    }

    .content-wrapper {
        padding: 0.5rem
    }

    .page-header h1 {
        font-size: 2rem
    }
}

.content-wrapper>*:not(:last-child) {
    margin-bottom: 1.5rem
}

.youtube-embed {
    aspect-ratio: 16/9;
    width: 100%;
    position: relative; 
    cursor: pointer;
    background-color: #000;
    border-radius: .5rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);
    background-size: cover;
    background-position: center; 
}

.youtube-embed iframe {
    
}

.youtube-embed .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px; 
    height: 42px; 
    background-color: #f00; 
    border-radius: 9px; 
    opacity: 0.8;
    transition: all 0.2s cubic-bezier(0, 0, 0.2, 1);
}

.youtube-embed .play-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-30%, -50%); 
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff; 
}

.youtube-embed:hover .play-button {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.cta-box {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding: 1rem 0;
}

.cta-box a {
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 700;
    transition: background-color .2s ease-in-out;
    box-shadow: var(--btn-active-shadow);
}

.cta-box a:first-child {
    background-color: var(--btn-active-bg);
    color: var(--btn-active-text);
}

.cta-box a:last-child {
    background-color: var(--btn-inactive-bg);
    color: var(--btn-inactive-text);
    border: 1px solid var(--btn-inactive-text);
}

.cta-box a:last-child:hover {
    background-color: var(--btn-inactive-hover-bg);
}