/**
 * Spotify Public Grabber — Frontend Styles
 *
 * Mobile-first. Dark glassmorphism aesthetic with Spotify green accent.
 * No external dependencies — all CSS custom properties, no preprocessors.
 */

/* ── Design tokens ──────────────────────────────────────────────────────────── */
:root {
	--spg-green:        #1DB954;
	--spg-green-dark:   #158a3e;
	--spg-green-glow:   rgba(29, 185, 84, 0.25);
	--spg-bg:           #0d0d0d;
	--spg-surface:      rgba(255, 255, 255, 0.05);
	--spg-surface-hover:rgba(255, 255, 255, 0.08);
	--spg-border:       rgba(255, 255, 255, 0.10);
	--spg-border-focus: rgba(29, 185, 84, 0.60);
	--spg-text:         #e8e8e8;
	--spg-text-muted:   #a0a0a0;
	--spg-error:        #e53e3e;
	--spg-error-bg:     rgba(229, 62, 62, 0.15);
	--spg-success-bg:   rgba(29, 185, 84, 0.15);
	--spg-radius:       14px;
	--spg-radius-sm:    8px;
	--spg-transition:   0.25s cubic-bezier(0.4, 0, 0.2, 1);
	--spg-shadow:       0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--spg-border);
	--spg-font:         -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}

/* ── Root container ─────────────────────────────────────────────────────────── */
.spg-grabber {
	font-family:    var(--spg-font);
	background:     var(--spg-surface);
	backdrop-filter: blur(20px) saturate(1.5);
	-webkit-backdrop-filter: blur(20px) saturate(1.5);
	border:         1px solid var(--spg-border);
	border-radius:  var(--spg-radius);
	box-shadow:     var(--spg-shadow);
	padding:        2rem 1.5rem;
	max-width:      560px;
	width:          100%;
	margin:         0 auto;
	color:          var(--spg-text);
	position:       relative;
	overflow:       hidden;
}

/* Subtle top highlight line */
.spg-grabber::before {
	content:    '';
	position:   absolute;
	top:        0;
	left:       0;
	right:      0;
	height:     2px;
	background: linear-gradient(90deg, transparent, var(--spg-green), transparent);
	opacity:    0.6;
}

/* ── Heading ────────────────────────────────────────────────────────────────── */
.spg-title {
	margin:      0 0 1.25rem;
	font-size:   1.25rem;
	font-weight: 700;
	letter-spacing: -0.02em;
	color:       var(--spg-text);
}

/* ── Form ───────────────────────────────────────────────────────────────────── */
.spg-form {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
}

.spg-label {
	font-size:     0.8125rem;
	font-weight:   600;
	color:         var(--spg-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.06em;
}

.spg-input-row {
	display:   flex;
	gap:       0.5rem;
	flex-wrap: wrap;
}

.spg-input {
	flex:           1 1 240px;
	background:     rgba(255, 255, 255, 0.04);
	border:         1px solid var(--spg-border);
	border-radius:  var(--spg-radius-sm);
	color:          var(--spg-text);
	font-family:    var(--spg-font);
	font-size:      0.9375rem;
	padding:        0.65rem 1rem;
	transition:     border-color var(--spg-transition), box-shadow var(--spg-transition);
	outline:        none;
	min-width:      0;
}

.spg-input::placeholder {
	color:   var(--spg-text-muted);
	opacity: 0.7;
}

.spg-input:focus {
	border-color: var(--spg-border-focus);
	box-shadow:   0 0 0 3px var(--spg-green-glow);
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.spg-btn {
	display:        inline-flex;
	align-items:    center;
	justify-content: center;
	gap:            0.4rem;
	border:         none;
	border-radius:  var(--spg-radius-sm);
	cursor:         pointer;
	font-family:    var(--spg-font);
	font-size:      0.9375rem;
	font-weight:    600;
	padding:        0.65rem 1.25rem;
	transition:     background var(--spg-transition), transform var(--spg-transition), box-shadow var(--spg-transition), opacity var(--spg-transition);
	user-select:    none;
	white-space:    nowrap;
}

.spg-btn:active { transform: scale(0.97); }

.spg-btn:disabled {
	opacity: 0.55;
	cursor:  not-allowed;
	transform: none;
}

/* Primary — resolve */
.spg-btn--primary {
	background: var(--spg-green);
	color:      #000;
	min-width:  100px;
	position:   relative;
	overflow:   hidden;
}

.spg-btn--primary:hover:not(:disabled) {
	background:  var(--spg-green-dark);
	box-shadow:  0 4px 20px var(--spg-green-glow);
}

/* Download */
.spg-btn--download {
	background: transparent;
	border:     1.5px solid var(--spg-green);
	color:      var(--spg-green);
	width:      100%;
	margin-top: 0.75rem;
	font-size:  1rem;
	padding:    0.75rem 1.25rem;
}

.spg-btn--download svg {
	width:  18px;
	height: 18px;
}

.spg-btn--download:hover:not(:disabled) {
	background: var(--spg-green);
	color:      #000;
	box-shadow: 0 4px 20px var(--spg-green-glow);
}

/* ── Spinner ────────────────────────────────────────────────────────────────── */
.spg-spinner {
	display:        none;
	width:          16px;
	height:         16px;
	border:         2.5px solid rgba(0, 0, 0, 0.3);
	border-top-color: #000;
	border-radius:  50%;
	animation:      spg-spin 0.7s linear infinite;
}

.spg-btn--loading .spg-btn-text { display: none; }
.spg-btn--loading .spg-spinner  { display: block; }

@keyframes spg-spin {
	to { transform: rotate(360deg); }
}

/* ── Preview card ───────────────────────────────────────────────────────────── */
.spg-preview {
	margin-top:    1.25rem;
	display:       flex;
	align-items:   center;
	gap:           1rem;
	flex-wrap:     wrap;
	background:    rgba(255, 255, 255, 0.03);
	border:        1px solid var(--spg-border);
	border-radius: var(--spg-radius-sm);
	padding:       1rem;
	opacity:       0;
	transform:     translateY(8px);
	transition:    opacity var(--spg-transition), transform var(--spg-transition);
	flex-direction: column;
	align-items:   flex-start;
}

/* Preview entrance animation */
.spg-preview--visible {
	opacity:   1;
	transform: translateY(0);
}

.spg-preview-top {
	display:     flex;
	align-items: center;
	gap:         1rem;
	width:       100%;
}

.spg-cover {
	width:         72px;
	height:        72px;
	border-radius: 6px;
	object-fit:    cover;
	flex-shrink:   0;
	box-shadow:    0 4px 16px rgba(0,0,0,0.4);
}

.spg-track-info {
	display:        flex;
	flex-direction: column;
	gap:            0.2rem;
	flex:           1;
	min-width:      0;
	width:          100%;
}

.spg-track-artist {
	font-size:     0.8125rem;
	color:         var(--spg-green);
	font-weight:   600;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	white-space:   nowrap;
	overflow:      hidden;
	text-overflow: ellipsis;
}

.spg-track-title {
	font-size:   1.0625rem;
	font-weight: 700;
	color:       var(--spg-text);
	line-height: 1.3;
	white-space: nowrap;
	overflow:    hidden;
	text-overflow: ellipsis;
}

.spg-track-album {
	font-size: 0.8125rem;
	color:     var(--spg-text-muted);
	white-space: nowrap;
	overflow:  hidden;
	text-overflow: ellipsis;
}

/* ── Toast notifications ────────────────────────────────────────────────────── */
.spg-toast-container {
	position: relative;
	margin-top: 0.75rem;
	display:  flex;
	flex-direction: column;
	gap:      0.4rem;
}

.spg-toast {
	border-radius:  var(--spg-radius-sm);
	font-size:      0.875rem;
	font-weight:    500;
	padding:        0.6rem 0.9rem;
	opacity:        0;
	transform:      translateY(4px);
	transition:     opacity 0.2s ease, transform 0.2s ease;
	pointer-events: none;
}

.spg-toast--visible {
	opacity:   1;
	transform: translateY(0);
}

.spg-toast--error {
	background: var(--spg-error-bg);
	border:     1px solid rgba(229, 62, 62, 0.3);
	color:      #fc8181;
}

.spg-toast--success {
	background: var(--spg-success-bg);
	border:     1px solid rgba(29, 185, 84, 0.3);
	color:      var(--spg-green);
}

.spg-toast--info {
	background: rgba(255,255,255,0.05);
	border:     1px solid var(--spg-border);
	color:      var(--spg-text-muted);
}

/* ── Legal disclaimer ───────────────────────────────────────────────────────── */
.spg-disclaimer {
	margin:    1rem 0 0;
	font-size: 0.75rem;
	color:     var(--spg-text-muted);
	line-height: 1.5;
	border-top: 1px solid var(--spg-border);
	padding-top: 0.75rem;
	opacity:   0.7;
}

/* ── Light mode override ────────────────────────────────────────────────────── */
@media (prefers-color-scheme: light) {
	.spg-grabber {
		--spg-bg:           #f7f7f7;
		--spg-surface:      rgba(0, 0, 0, 0.03);
		--spg-surface-hover:rgba(0, 0, 0, 0.06);
		--spg-border:       rgba(0, 0, 0, 0.10);
		--spg-text:         #111;
		--spg-text-muted:   #666;
		--spg-shadow:       0 8px 32px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--spg-border);
		color-scheme:       light;
	}
	.spg-spinner {
		border-color: rgba(255, 255, 255, 0.3);
		border-top-color: #fff;
	}
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (min-width: 480px) {
	.spg-grabber { padding: 2.25rem 2rem; }
	.spg-preview { flex-direction: row; align-items: center; }
	.spg-track-info { width: auto; }
	.spg-btn--download { width: auto; align-self: flex-end; margin-top: 0; margin-left: auto; }
}