:root{
    /*dark tema*/
    --bg-grad-1: #0f2027;
    --bg-grad-2: #203a43;
    --bg-grad-3: #2c5364;
    --card-bg: rgba(24,24,24,0.7);
    --card-hover: rgba(40,40,40,0.9);
    --spotify-green: #1DB954;
    --text-main: #FFFFFF;
    --text-sub: #b3b3b3;
    --shadow: rgba(0,0,0,0.5);
}

body.light-theme {
    /*aydınlık tema*/
    --bg-grad-1: #e0eafc;
    --bg-grad-2: #cfdef3;
    --bg-grad-3: #e0eafc;
    --card-bg: rgba(255,255,255,0.7);
    --card-hover: rgba(255,255,255,0.95);
    --spotify-green: #1ed960;
    --text-main: #121212;
    --text-sub: #444444;
    --shadow: rgba(0,0,0,0.1);
}

body{
    margin: 0;
    font-family: 'Segoe UI', Tahoma,Geneva,Verdana,sans-serif;
    color: var(--text-main);
    /*hareketli arkaplan*/
    background: linear-gradient(-45deg, var(--bg-grad-1), var(--bg-grad-2), var(--bg-grad-3), var(--spotify-green));
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    min-height: 100vh;
    transition: color 0.4s ease;
}

/*arkaplan animasyonu devam*/
@keyframes gradientBG{
    0% { background-position: 0% 50%; }
    50% {background-position: 100% 50%;}
    100% {background-position: 0% 50%;}
}

.app-container{
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 20px;
}

.theme-switch-wrapper{
    /*tema anahtarı*/
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}



.theme-switch{
    display: inline-block;
    height:34px;
    position:relative;
    width:60px;
}

.slider{
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left:0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before{
    background-color:#fff;
    bottom:4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
    z-index: 2;
}


input:checked + slider{background-color: var(--spotify-green);}
input:checked + slider:before{ transform: translateX(26px) !important;}
.slider.round{border-radius: 34px;}
.slider.round:before{border-radius: 50%;}

/*başlık ve parlama efektleri*/
.header{
    text-align: center;
    margin-bottom: 40px;
}
.header h1{
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 0 4px 10px var(--shadow);
}

.highlight{
    color: var(--spotify-green);
    animation: neonGlow 2s ease-in-out infinite alternate;
}

@keyframes neonGlow{
    from {
        text-shadow: 0 0 5px var(--spotify-green), 0 0 10px var(--spotify-green);
    }
    to{
        text-shadow: 0 0 20px var(--spotify-green), 0 0 30px #1ed760;
    }
}

/*cam efekti girdi*/
.input-section{
    display: flex;
    flex-direction: column;
    gap:15px;
    max-width: 600px;
    margin:0 auto 50px auto;
}

textarea{
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    color: var(--text-main);
    padding: 15px;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px var(--shadow);
}

textarea:focus{
    outline:none;
    border-color: var(--spotify-green);
    transform: translateY(-2px);
}

button{
    background-color: var(--spotify-green);
    color: #000;
    border: none;
    padding: 15px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor:pointer;
    transition:all 0.3s ease;
    box-shadow: 0 4px 15px rgba(29,185,84,0.4);
}

button:hover:not(:disabled){
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 20px rgba(29,185,84,0.6)
}
button:disabled{
    background-color: #555;
    cursor:not-allowed;
    transform:none;
    box-shadow: none;
}

/*şarkı listesi gelme animasyonu*/

.songs-grid{
    display:grid;
    grid-template-columns: repeat(auto-fill, minmax(250px,1fr));
    gap:20px;
    margin-top: 20px;
}

.song-card{
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 15px;
    display:flex;
    flex-direction: column;
    gap: 15px;
    box-shadow: 0 10px 30px var(--shadow);

    /*animasyon başlangıcı*/
    opacity: 0;
    transform: translateY(40px);
    animation: slideUpFade 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slideUpFade{
    to{
        opacity: 1;
        transform: translateY(0);
    }
}

.song-card:hover{
    background-color: var(--card-hover);
    transform: translateY(-5px);
}

.album-art{
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.song-info h3{
    margin: 0 0 5px 0;
    font-size: 1.1rem;
}

.song-info p{
    margin: 0 0 15px 0;
    color: var(--text-main);
    font-size: 0.9rem;
}

.actions{
    display:flex;
    flex-direction: column;
    gap:10px;
    margin-top:auto;
}

.spotify-btn{
    background-color: transparent;
    color: var(--text-main);
    text-align: center;
    text-decoration: none;
    border:2px solid var(--text-sub);
    padding: 8px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.spotify-btn:hover{
    border-color: var(--spotify-green);
    color: var(--spotify-green);
}

.audio-player{
    width:100%;
    height:35px;
    border-radius: 20px;
}

.error-message{
    color: #ff4444;
    text-align:center;
    margin-bottom:20px;
    font-weight: bold;
}


/* Üst Kontroller ve Dil Butonu */
.top-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 10;
}

.control-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-main);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    backdrop-filter: blur(5px);
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

    .control-btn:hover {
        background: var(--spotify-green);
        color: black;
        border-color: transparent;
    }

.theme-switch-wrapper {
    position: relative;
    top: 0;
    right: 0;
}
/* Eski konumu ezmek için */

/* Geçmiş Aramalar */
.history-section {
    text-align: center;
    margin-bottom: 40px;
}

    .history-section h3 {
        font-size: 1rem;
        color: var(--text-sub);
        margin-bottom: 10px;
        font-weight: normal;
    }

.history-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.history-tag {
    background: rgba(29, 185, 84, 0.1);
    border: 1px solid var(--spotify-green);
    color: var(--text-main);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

    .history-tag:hover {
        background: var(--spotify-green);
        color: black;
    }

/* Modal (Pop-up) Tasarımı */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 15px 40px var(--shadow);
    animation: scaleUp 0.3s ease;
    text-align: center;
    color: var(--text-main);
}

@keyframes scaleUp {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-sub);
    cursor: pointer;
    transition: color 0.3s;
}

    .close-btn:hover {
        color: var(--spotify-green);
    }

.modal-album-art {
    width: 150px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    margin-bottom: 15px;
}

.modal-stats {
    display: flex;
    justify-content: space-around;
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 10px;
    margin: 20px 0;
}

.stat-box p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-sub);
}

.stat-box h4 {
    margin: 5px 0 0 0;
    color: var(--spotify-green);
    font-size: 1.1rem;
}