:root {
    /* Color Palette - Dark Mode (Default) */
    --bg-color: #0d0d0d;
    --card-bg: #1a1a1a;
    --card-hover: #222222;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #ffffff;
    --border-color: #333333;
    
    /* Spotify Colors */
    --spotify-green: #1DB954;
    
    /* Geometry */
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 32px;
    
    /* Transitions */
    --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    --transition-smooth: 0.3s ease;
}

/* Light Mode Overrides */
body.light-mode {
    --bg-color: #f7f7f7;
    --card-bg: #ffffff;
    --card-hover: #f0f0f0;
    --text-primary: #111111;
    --text-secondary: #666666;
    --accent: #000000;
    --border-color: #e0e0e0;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Changed from center for scrolling */
    padding: 40px 20px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

.container {
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Top Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px;
}

.view-counter {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--card-bg);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.theme-toggle {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: transform var(--transition-spring), background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.theme-toggle:hover {
    transform: scale(1.05);
    background-color: var(--card-hover);
}

/* Typography */
h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
}

/* Profile Section */
.profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    margin-bottom: 8px;
}

.avatar-container {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    padding: 4px;
    margin-bottom: 8px;
    background-color: var(--card-bg);
    transition: border-color var(--transition-smooth), background-color var(--transition-smooth);
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--bg-color);
    /* Improve image scaling quality and circular crop sharpness on Retina/High-DPI screens */
    image-rendering: -webkit-optimize-contrast;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translate3d(0, 0, 0);
}

.name {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.bio {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Links Section */
.links {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 24px;
    margin-top: -12px;
    margin-bottom: 8px;
}

.social-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    transition: transform var(--transition-spring), opacity 0.2s ease;
}

.social-icon:hover {
    transform: translateY(-6px) scale(1.1);
    opacity: 0.9;
}

.spotify-card {
    padding: 16px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: transform var(--transition-smooth);
}

.spotify-card:hover {
    transform: translateY(-2px);
}

.spotify-link-wrapper {
    text-decoration: none;
    color: inherit;
    display: block;
}

.spotify-link-wrapper:hover .track-name {
    text-decoration: underline;
}

.spotify-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.spotify-logo {
    color: var(--spotify-green);
    display: flex;
    align-items: center;
}

.spotify-status {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    flex-grow: 1;
}

/* Sound Wave Animation */
.sound-wave {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 16px;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.sound-wave.active { opacity: 1; }
.sound-wave span {
    display: block;
    width: 3px;
    background-color: var(--spotify-green);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}
.sound-wave.active span:nth-child(1) { animation-delay: 0.0s; height: 10px; }
.sound-wave.active span:nth-child(2) { animation-delay: 0.2s; height: 16px; }
.sound-wave.active span:nth-child(3) { animation-delay: 0.4s; height: 12px; }
.sound-wave.active span:nth-child(4) { animation-delay: 0.6s; height: 8px; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

.spotify-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.album-art-container {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    background-color: var(--bg-color);
    position: relative;
    cursor: pointer;
}
.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: background-color var(--transition-smooth);
    color: #ffffff;
}
.play-overlay svg {
    transition: transform var(--transition-smooth);
}
.album-art-container:hover .play-overlay {
    background-color: rgba(0, 0, 0, 0.7);
}
.album-art-container:hover .play-overlay svg {
    transform: scale(1.15);
}
.album-art { width: 100%; height: 100%; object-fit: cover; }
.track-info { display: flex; flex-direction: column; gap: 4px; overflow: hidden; }
.track-name { font-size: 18px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-artist { font-size: 15px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }


/* Guestbook / Comments Section */
.guestbook-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-title {
    font-size: 20px;
    padding-left: 8px;
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--radius-lg);
    transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.input-field {
    width: 100%;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 15px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-smooth), background-color var(--transition-smooth);
}

.input-field:focus {
    border-color: var(--text-secondary);
}

.textarea {
    resize: none;
    height: 80px;
}

.submit-btn {
    background-color: var(--text-primary);
    color: var(--bg-color);
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 16px;
    border: none;
    padding: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition-spring), opacity var(--transition-smooth);
}

.submit-btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comment-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
    display: flex;
    gap: 12px;
}

.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}

.comment-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.comment-author {
    font-weight: 700;
    font-size: 15px;
    color: var(--text-secondary);
}

.comment-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.comment-body {
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    word-break: break-word;
}

.loading-text, .error-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    padding: 20px;
}

/* Footer */
footer {
    text-align: center;
    padding-top: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

@media (max-width: 400px) {
    .container { gap: 24px; }
    .avatar-container { width: 100px; height: 100px; }
    .name { font-size: 24px; }
}

/* --- SKELETON LOADING --- */
.skeleton {
    background: linear-gradient(90deg, 
        var(--card-bg) 25%, 
        var(--border-color) 50%, 
        var(--card-bg) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s linear infinite;
    border-radius: 4px;
    color: transparent !important;
}

.skeleton::before, .skeleton::after, .skeleton * {
    visibility: hidden;
}

@keyframes skeleton-shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1.2em;
    border-radius: 4px;
    display: inline-block;
}

.skeleton-text.short { width: 40%; }
.skeleton-text.medium { width: 70%; }

/* --- GUESTBOOK NEW FEATURES --- */
.comment-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    transition: color var(--transition-smooth);
}

.action-btn:hover {
    color: var(--text-primary);
}

.action-btn.like-btn svg {
    transition: transform var(--transition-spring), fill var(--transition-smooth);
}

.action-btn.like-btn:hover svg {
    transform: scale(1.2);
}

.action-btn.like-btn.liked {
    color: #ff2b5e;
}

.action-btn.like-btn.liked svg {
    fill: #ff2b5e;
}

.action-btn.delete-btn {
    color: #ff4d4f;
    margin-left: auto;
}

.action-btn.delete-btn:hover {
    color: #ff7875;
}

.reply-indent {
    margin-left: 20px;
    border-left: 2px solid var(--border-color);
    padding-left: 12px;
}

@media (max-width: 400px) {
    .reply-indent {
        margin-left: 10px;
        padding-left: 10px;
    }
}

.verified-badge {
    color: #1DA1F2;
    display: inline-flex;
    align-items: center;
    margin-left: 4px;
}

/* --- ADVANCED GUESTBOOK FEATURES --- */
.creator-like-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background-color: rgba(255, 43, 94, 0.1);
    border: 1px solid rgba(255, 43, 94, 0.2);
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    color: #ff2b5e;
}

.creator-like-pfp {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    object-fit: cover;
}

.replies-thread {
    margin-left: 16px;
    border-left: 1px solid var(--border-color);
    padding-left: 12px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

@media (max-width: 400px) {
    .replies-thread {
        margin-left: 8px;
        padding-left: 8px;
    }
}

.toggle-replies-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    transition: color var(--transition-smooth);
}

.toggle-replies-btn:hover {
    color: var(--text-primary);
}

/* Inline Reply Form */
.inline-reply-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.inline-reply-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.inline-reply-btn {
    background-color: var(--text-primary);
    color: var(--bg-color);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.inline-cancel-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

/* Auth Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1) forwards;
}

@keyframes slideUp {
    to { transform: translateY(0); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-primary);
}

/* Post Photo Styles */
/* Media Gallery (Horizontal Scroll) */
.media-gallery {
    display: flex;
    overflow-x: auto;
    gap: 12px;
    margin-top: 12px;
    padding-bottom: 8px;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
}
.media-gallery::-webkit-scrollbar {
    height: 6px;
}
.media-gallery::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}
.media-gallery img {
    height: 300px;
    width: auto;
    max-width: 85%;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    scroll-snap-align: start;
    cursor: zoom-in;
    transition: opacity 0.2s;
}
.media-gallery img:hover {
    opacity: 0.9;
}

/* Lightbox Modal */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(8px);
    cursor: zoom-out;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
}
#lightbox-image {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    transform: scale(0.95);
    animation: zoomIn 0.3s forwards;
}
@keyframes zoomIn {
    to { transform: scale(1); }
}