/* Modern Reset and Variables */
:root {
    --bg-dark: #09090b;
    --bg-card: rgba(20, 20, 25, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    --spotify-green: #1db954;
    --spotify-green-hover: #1ed760;
    --spotify-green-glow: rgba(29, 185, 84, 0.15);
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.1);
    --success: #10b981;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --blur-strength: 16px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Glowing Background Auras */
.glow-auras {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.aura {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.25;
    mix-blend-mode: screen;
    animation: pulse 12s infinite alternate;
}

.aura-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--spotify-green) 0%, rgba(29, 185, 84, 0) 70%);
}

.aura-2 {
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, #3b82f6 0%, rgba(59, 130, 246, 0) 70%);
    animation-delay: -6s;
}

@keyframes pulse {
    0% {
        transform: scale(1) translate(0, 0);
        opacity: 0.2;
    }
    100% {
        transform: scale(1.15) translate(5%, 5%);
        opacity: 0.35;
    }
}

/* App Container */
.app-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(var(--blur-strength));
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.logo-area h1 span {
    color: var(--spotify-green);
}

.icon-logo {
    width: 2.2rem;
    height: 2.2rem;
    filter: drop-shadow(0 0 8px rgba(29, 185, 84, 0.4));
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* User Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
}

.avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--spotify-green);
}

#user-name {
    font-weight: 500;
    font-size: 0.85rem;
}

/* Buttons */
button {
    font-family: var(--font-body);
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-dark);
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.btn-success {
    background-color: var(--spotify-green);
    color: #fff;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    box-shadow: 0 4px 15px var(--spotify-green-glow);
}

.btn-success:hover {
    background-color: var(--spotify-green-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(29, 185, 84, 0.4);
}

.btn-warning {
    background-color: #f59e0b;
    color: #fff;
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.15);
}

.btn-warning:hover {
    background-color: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.3);
}

.btn-danger {
    background-color: #ef4444;
    color: #fff;
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.15);
}

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.3);
}


.btn-icon {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--spotify-green);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

.btn-full {
    width: 100%;
    margin-top: 1rem;
}

.btn-icon-close {
    background: none;
    color: var(--text-muted);
}
.btn-icon-close:hover {
    color: var(--text-primary);
}

/* Banner Alert */
.banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    animation: slideDown 0.4s ease-out;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.banner-icon {
    color: var(--danger);
    width: 24px;
    height: 24px;
}

.banner h3 {
    font-size: 0.95rem;
    font-weight: 600;
}

.banner p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 1.5rem;
    flex-grow: 1;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Panels */
.panel {
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur-strength));
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.panel-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.form-group label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--text-secondary);
}

input[type="text"], textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-smooth);
    width: 100%;
}

input[type="text"]:focus, textarea:focus {
    border-color: var(--spotify-green);
    box-shadow: 0 0 10px rgba(29, 185, 84, 0.2);
}

input:disabled, textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Search Box */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    pointer-events: none;
    width: 18px;
    height: 18px;
}

.search-box input {
    padding-left: 2.75rem !important;
}

/* Tabs */
.tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.25rem;
    gap: 0.25rem;
}

.tab-btn {
    padding: 0.6rem 0.5rem;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: 6px;
    color: var(--text-secondary);
    background: transparent;
}

.tab-btn i {
    width: 14px;
    height: 14px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--spotify-green);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* Search Results */
.search-results-container {
    margin-top: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 180px;
    max-height: 280px;
}

.search-results-list {
    margin-top: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow-y: auto;
    flex-grow: 1;
}

.search-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    transition: var(--transition-smooth);
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.search-item.selected {
    background: rgba(29, 185, 84, 0.08);
    border-left: 3px solid var(--spotify-green);
}

.search-item-img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    object-fit: cover;
}

.search-item-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.search-item-title {
    font-weight: 600;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-item-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Playlist Settings */
.playlist-settings-group {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    animation: fadeIn 0.4s ease-out;
}

/* Preview Placeholder */
.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
    flex-grow: 1;
    gap: 1rem;
}

.placeholder-icon {
    width: 3.5rem;
    height: 3.5rem;
    stroke-width: 1.2;
    opacity: 0.5;
}

/* Preview Content */
.preview-content {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    overflow: hidden;
}

.selected-item-card {
    display: flex;
    gap: 1.25rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    align-items: center;
}

#selected-item-img {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
}

.selected-item-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.badge {
    background: var(--spotify-green-glow);
    color: var(--spotify-green);
    border: 1px solid rgba(29, 185, 84, 0.2);
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    align-self: flex-start;
    text-transform: uppercase;
}

#selected-item-title {
    font-size: 1.15rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

#selected-item-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Tracklist */
.tracklist-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    max-height: 480px;
}

.tracklist-header {
    display: grid;
    grid-template-columns: 40px 1fr 1fr 60px;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.track-list {
    display: flex;
    flex-direction: column;
    margin-top: 0.5rem;
}

.track-row {
    display: grid;
    grid-template-columns: 40px 1fr 1fr 60px;
    padding: 0.65rem 0.75rem;
    align-items: center;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.track-row:hover {
    background: rgba(255, 255, 255, 0.03);
}

.track-index {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.track-title-cell {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding-right: 1rem;
}

.track-title {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-album {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-duration {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
    padding-right: 0.5rem;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: var(--transition-smooth);
}

.modal {
    width: 100%;
    max-width: 500px;
    margin: 1.5rem;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.modal-header h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
}

.settings-help {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.step-guide {
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    margin-bottom: 1.25rem;
}

.step-guide h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step-guide ol {
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    color: var(--text-secondary);
}

.step-guide code {
    background: rgba(255,255,255,0.08);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    color: var(--spotify-green);
    word-break: break-all;
    font-family: monospace;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

/* Toasts */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 2000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    padding: 0.85rem 1.25rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    min-width: 250px;
    max-width: 380px;
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-error {
    border-left: 4px solid var(--danger);
}

.toast-message {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 2rem 0 1rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: auto;
}

.heart-icon {
    width: 12px;
    height: 12px;
    fill: var(--danger);
    color: var(--danger);
    display: inline;
}

/* Helpers */
.spotify-green-text {
    color: var(--spotify-green);
}

.hidden {
    display: none !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Animations */
@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleUp {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}