:root {
    --bg-gradient-start: #1a1a1a;
    --bg-gradient-end: #282828;
    --text-color: #e0e0e0;
    --player-bg: #121212;
    --shadow-color: rgba(0, 0, 0, 0.8);
    --accent-color: #1db954;
    --progress-bg: #444;
    --thumb-color: #1db954;
    --playlist-border: #333;
    --playlist-hover-bg: #2a2a2a;
    --active-playlist-text: #ffffff;
    --button-text-color: #ffffff;
}

body {
    margin: 0;
    background: linear-gradient(to bottom, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh; /* Use min-height for flexibility */
    padding: 20px; /* Add some padding around the player */
    box-sizing: border-box;
    transition: background 0.5s ease, color 0.5s ease;
}

.player {
    background: var(--player-bg);
    padding: 30px;
    border-radius: 20px; /* Slightly larger border-radius */
    width: 100%;
    max-width: 900px; /* Increased width for a two-column layout */
    text-align: center;
    box-shadow: 0 15px 40px var(--shadow-color); /* More pronounced shadow */
    transition: background 0.5s ease, box-shadow 0.5s ease;
    display: flex;
    flex-direction: column; /* Keep top elements stacked */
    align-items: center;
    gap: 20px; /* Space between elements */
    min-height: 500px; /* Ensure player has a minimum height */
}

.main-content-wrapper {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around; /* Distribute space evenly */
    align-items: flex-start;
    gap: 30px; /* Space between columns */
    width: 100%;
    margin-top: 20px;
}

#main-player-content {
    flex: 0 0 45%; /* Take up 45% of available space */
    min-width: 300px; /* Adjusted minimum width */
    max-width: 400px; /* Added max-width for better control */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.playlist-section {
    flex: 0 0 45%; /* Take up 45% of available space */
    min-width: 300px; /* Adjusted minimum width */
    max-width: 400px; /* Added max-width for better control */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

/* Light Mode */
body.light-mode {
    --bg-gradient-start: #f0f0f0;
    --bg-gradient-end: #e0e0e0;
    --text-color: #333;
    --player-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --accent-color: #007bff;
    --progress-bg: #ccc;
    --thumb-color: #007bff;
    --playlist-border: #ddd;
    --playlist-hover-bg: #f5f5f5;
    --active-playlist-text: #ffffff;
    --button-text-color: #ffffff;
}

body.light-mode .spotify-logo {
    filter: invert(0.8); /* Adjust invert for light mode */
}

body.light-mode h2 {
    color: var(--accent-color);
}

body.light-mode .controls button {
    background: var(--accent-color);
    color: var(--button-text-color);
}

body.light-mode .controls button:active {
    background: #0056b3;
}

body.light-mode #progress::-webkit-slider-thumb,
body.light-mode #progress::-moz-range-thumb,
body.light-mode #volume::-webkit-slider-thumb,
body.light-mode #volume::-moz-range-thumb {
    background: var(--thumb-color);
}

body.light-mode #playlist li.active {
    background: var(--accent-color);
    color: var(--active-playlist-text);
}

#theme-toggle {
    background: var(--accent-color);
    color: var(--button-text-color);
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    letter-spacing: 0.5px;
    transition: background 0.3s ease, color 0.3s ease, transform 0.2s ease;
    margin: 0 auto 10px auto; /* Center horizontally and add bottom margin */
    max-width: 180px; /* Constrain width to match buttons */
}

#theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.auth-container {
    width: 100%;
    max-width: 350px;
    margin-bottom: 20px; /* Keep vertical spacing */
    padding: 25px; /* Increased padding */
    border-radius: 15px;
    background: var(--player-bg);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    gap: 15px; /* Increased gap */
    transition: background 0.5s ease, box-shadow 0.5s ease;
}

#logged-out-view, #logged-in-view {
    display: flex;
    flex-direction: column;
    gap: 15px; /* Increased gap */
    align-items: center;
}

#auth-username, #auth-password {
    width: 100%;
    padding: 10px 15px;
    border-radius: 25px;
    border: 1px solid var(--playlist-border);
    background: var(--progress-bg);
    color: var(--text-color);
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease, background 0.3s ease;
}

#auth-username::placeholder {
    color: #bbb;
}

#auth-username:focus, #auth-password:focus {
    border-color: var(--accent-color);
    background: #282828;
}

#login-btn, #register-btn, #logout-btn {
    background: var(--accent-color);
    color: var(--button-text-color);
    border: none;
    padding: 12px 25px; /* Larger buttons */
    border-radius: 25px;
    cursor: pointer;
    font-size: 1.1em; /* Larger font */
    font-weight: bold;
    transition: background 0.3s ease, transform 0.2s ease;
    width: 100%;
    max-width: 180px; /* Wider buttons */
}

#login-btn:hover, #register-btn:hover, #logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

#welcome-message {
    font-size: 1.3em; /* Larger welcome message */
    font-weight: bold;
    color: var(--text-color);
}

/* Light Mode adjustments for auth */
body.light-mode .auth-container {
    background: var(--player-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
}

body.light-mode #auth-username,
body.light-mode #auth-password {
    background: var(--progress-bg);
    color: var(--text-color);
    border-color: var(--playlist-border);
}

body.light-mode #auth-username:focus,
body.light-mode #auth-password:focus {
    background: #fff;
    border-color: var(--accent-color);
}

body.light-mode #login-btn,
body.light-mode #register-btn,
body.light-mode #logout-btn {
    background: var(--accent-color);
    color: var(--button-text-color);
}

.search-container {
    display: flex;
    align-items: center; /* Align items vertically */
    gap: 10px;
    margin-bottom: 20px; /* Keep vertical spacing */
    width: 100%;
    max-width: 350px; /* Adjusted max-width for better fit */
}

#search-input {
    flex: 1;
    padding: 10px 15px;
    border-radius: 25px;
    border: 1px solid var(--playlist-border);
    background: var(--progress-bg);
    color: var(--text-color);
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease, background 0.3s ease;
}

#search-input::placeholder {
    color: #bbb;
}

#search-input:focus {
    border-color: var(--accent-color);
    background: #282828;
}

#search-button {
    background: var(--accent-color);
    color: var(--button-text-color);
    border: none;
    padding: 10px 15px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    transition: background 0.3s ease, transform 0.2s ease;
}

#search-button:hover {
    transform: scale(1.05);
}

#search-button:active {
    transform: scale(0.95);
}

/* Light Mode adjustments for search bar */
body.light-mode .search-container {
    border-color: var(--playlist-border);
}

body.light-mode #search-input {
    background: var(--progress-bg);
    color: var(--text-color);
    border-color: var(--playlist-border);
}

body.light-mode #search-input::placeholder {
    color: #666;
}

body.light-mode #search-input:focus {
    background: #fff;
    border-color: var(--accent-color);
}

body.light-mode #search-button {
    background: var(--accent-color);
    color: var(--button-text-color);
}

.spotify-logo {
    width: 100px; /* Slightly smaller logo */
    height: auto;
    object-fit: contain;
    margin: 0 auto 10px auto; /* Center horizontally */
    filter: invert(0.2); /* Darken logo slightly for dark mode */
}

h2 {
    font-size: 2.2em;
    margin: 0 auto 10px auto; /* Center horizontally */
    color: var(--accent-color);
    letter-spacing: 1px;
    max-width: 350px; /* Constrain width */
}

.current-song {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    width: 100%;
}

.song-cover {
    width: 280px; /* Slightly smaller cover */
    height: 280px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    object-fit: cover; /* Ensure cover fills the area */
}

#visualizer {
    width: 100%;
    max-width: 280px; /* Match cover width */
    height: 80px; /* Adjust height as needed */
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    margin: 10px auto; /* Center horizontally and add top margin */
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

#lyrics-container {
    width: 100%;
    max-width: 350px; /* Keep max-width for readability */
    margin: 20px auto; /* Center horizontally within its flex parent */
    padding: 15px;
    background: var(--player-bg);
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow-color);
    text-align: left;
    max-height: 150px;
    overflow-y: auto;
}

#lyrics-container h4 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--accent-color);
    font-size: 1.2em;
}

#lyrics-text {
    white-space: pre-wrap; /* Preserve whitespace and wrap text */
    font-size: 0.9em;
    line-height: 1.5;
    color: var(--text-color);
}

/* Light Mode adjustments for lyrics */
body.light-mode #lyrics-container {
    background: var(--player-bg);
    box-shadow: 0 5px 15px var(--shadow-color);
}

#title {
    font-size: 1.6em;
    margin: 0;
    font-weight: bold;
    color: var(--text-color);
}

.controls {
    display: flex;
    justify-content: center; /* Center the control buttons */
    align-items: center;
    gap: 15px;
    margin-top: 10px;
    width: 100%; /* Ensure controls take full width to center properly */
}

.controls button {
    background: var(--accent-color);
    border: none;
    padding: 15px; /* Equal padding for circular buttons */
    color: var(--button-text-color);
    font-size: 24px; /* Larger icons */
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.controls button:hover {
    transform: scale(1.1);
    background: #1ed760; /* Slightly brighter on hover */
}

.controls button:active {
    transform: scale(0.95);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 350px; /* Constrain progress bar width */
    margin: 20px auto 10px auto; /* Center horizontally */
}

#current-time, #duration {
    font-size: 0.9em;
    color: var(--text-color);
}

#progress {
    -webkit-appearance: none;
    width: 100%;
    height: 6px; /* Thinner progress bar */
    background: var(--progress-bg);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

#progress::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px; /* Smaller thumb */
    height: 16px;
    border-radius: 50%;
    background: var(--thumb-color);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

#progress::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--thumb-color);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 200px; /* Constrain volume slider width */
    margin: 0 auto 20px auto; /* Center horizontally */
}

.volume-control label {
    font-size: 1.2em;
    color: var(--text-color);
}

#volume {
    -webkit-appearance: none;
    flex: 1;
    height: 4px; /* Thinner volume slider */
    background: var(--progress-bg);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

#volume::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; /* Smaller thumb */
    height: 14px;
    border-radius: 50%;
    background: var(--thumb-color);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
}

#volume::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--thumb-color);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
}

#playlist {
    list-style: none;
    padding: 0;
    width: 100%;
    max-width: 350px; /* Constrain playlist width */
    max-height: 200px; /* Slightly smaller playlist height */
    overflow-y: auto;
    border-top: 1px solid var(--playlist-border);
    margin-top: 20px; /* Keep vertical spacing */
}

#playlist li {
    padding: 12px 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--playlist-border);
    text-align: left;
    transition: background 0.2s ease, color 0.2s ease;
    font-size: 0.95em;
}

#playlist li:hover {
    background: var(--playlist-hover-bg);
}

#playlist li.active {
    background: var(--accent-color);
    color: var(--active-playlist-text);
    font-weight: bold;
}

#playlist li.dragging {
    opacity: 0.5;
    border: 2px dashed var(--accent-color);
}

/* Scrollbar styling for Webkit browsers */
#playlist::-webkit-scrollbar {
    width: 8px;
}

#playlist::-webkit-scrollbar-track {
    background: var(--player-bg);
    border-radius: 10px;
}

#playlist::-webkit-scrollbar-thumb {
    background: var(--progress-bg);
    border-radius: 10px;
    border: 2px solid var(--player-bg);
}

#playlist::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

.playlist-manager {
    width: 100%;
    max-width: 350px; /* Constrain playlist manager width */
    margin-top: 30px; /* Keep vertical spacing */
    padding-top: 20px;
    border-top: 1px solid var(--playlist-border);
    text-align: center;
}

.playlist-manager h3 {
    font-size: 1.5em;
    color: var(--text-color);
    margin-bottom: 15px;
}

.playlist-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

#new-playlist-name {
    flex: 1;
    max-width: 200px;
    padding: 8px 12px;
    border-radius: 20px;
    border: 1px solid var(--playlist-border);
    background: var(--progress-bg);
    color: var(--text-color);
    font-size: 0.9em;
    outline: none;
    transition: border-color 0.3s ease, background 0.3s ease;
}

#new-playlist-name::placeholder {
    color: #bbb;
}

#new-playlist-name:focus {
    border-color: var(--accent-color);
    background: #282828;
}

#create-playlist-btn,
#save-playlist-btn,
#load-playlist-btn,
#delete-playlist-btn {
    background: var(--accent-color);
    color: var(--button-text-color);
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: bold;
    transition: background 0.3s ease, transform 0.2s ease;
}

#create-playlist-btn:hover,
#save-playlist-btn:hover,
#load-playlist-btn:hover,
#delete-playlist-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

#saved-playlists {
    width: 100%;
    max-width: 250px;
    padding: 8px 12px;
    border-radius: 20px;
    border: 1px solid var(--playlist-border);
    background: var(--progress-bg);
    color: var(--text-color);
    font-size: 0.9em;
    outline: none;
    cursor: pointer;
    margin-right: 10px;
    -webkit-appearance: none; /* Remove default select styling */
    -moz-appearance: none;
    appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23ffffff%22%20d%3D%22M287%2C197.3L159.3%2C69.7c-4.7-4.7-12.3-4.7-17%2C0L5.4%2C197.3c-4.7%2C4.7-4.7%2C12.3%2C0%2C17l19.7%2C19.7c4.7%2C4.7%2C12.3%2C4.7%2C17%2C0l108.9-108.9l108.9%2C108.9c4.7%2C4.7%2C12.3%2C4.7%2C17%2C0l19.7-19.7C291.7%2C209.6%2C291.7%2C202%2C287%2C197.3z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 12px;
}

body.light-mode #new-playlist-name,
body.light-mode #saved-playlists {
    background: #e0e0e0;
    color: #333;
    border-color: #ccc;
}

body.light-mode #new-playlist-name:focus {
    background: #fff;
    border-color: var(--accent-color);
}

body.light-mode #saved-playlists {
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23333333%22%20d%3D%22M287%2C197.3L159.3%2C69.7c-4.7-4.7-12.3-4.7-17%2C0L5.4%2C197.3c-4.7%2C4.7-4.7%2C12.3%2C0%2C17l19.7%2C19.7c4.7%2C4.7%2C12.3%2C4.7%2C17%2C0l108.9-108.9l108.9%2C108.9c4.7%2C4.7%2C12.3%2C4.7%2C17%2C0l19.7-19.7C291.7%2C209.6%2C291.7%2C202%2C287%2C197.3z%22%2F%3E%3C%2Fsvg%3E');
}

@media (max-width: 600px) {
    .playlist-controls {
        flex-direction: column;
        align-items: center;
    }

    #new-playlist-name,
    #saved-playlists {
        max-width: 100%;
        margin-right: 0;
        margin-bottom: 10px;
    }

    #create-playlist-btn,
    #save-playlist-btn,
    #load-playlist-btn,
    #delete-playlist-btn {
        width: 100%;
        margin-bottom: 10px;
    }
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .player {
        padding: 20px;
        max-width: 90%;
        min-height: 400px; /* Adjust min-height for smaller screens */
    }

    .auth-container {
        padding: 20px;
        max-width: 90%;
    }

    #login-btn, #register-btn, #logout-btn {
        max-width: 100%;
    }

    .song-cover {
        width: 200px;
        height: 200px;
    }

    h2 {
        font-size: 1.8em;
    }

    #title {
        font-size: 1.4em;
    }

    .controls button {
        padding: 12px;
        font-size: 20px;
    }

    #theme-toggle {
        padding: 8px 15px;
    }
}