:root {
	--primary: #fe2c55;
	--text: #ffffff;
	--text-secondary: #e6e6e6;
	--overlay-bg: rgba(0, 0, 0, 0.6);
	--bg: #000000;
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
	-webkit-tap-highlight-color: transparent;
}

body {
	background-color: var(--bg);
	color: var(--text);
	font-family: 'Inter', system-ui, -apple-system, sans-serif;
	overflow: hidden; /* Prevent body scroll */
	height: 100vh;
	width: 100vw;
}

/* Utils */
.hidden {
	display: none !important;
}

/* Login Overlay */
.overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: #000;
	z-index: 1000;
	display: flex;
	justify-content: center;
	align-items: center;
}

.login-box {
	background: #1a1a1a;
	padding: 2rem;
	border-radius: 16px;
	width: 90%;
	max-width: 360px;
	text-align: center;
}

.login-box h1 {
	margin-bottom: 0.5rem;
	font-size: 1.5rem;
}
.login-box p {
	color: #888;
	margin-bottom: 2rem;
}

.login-box input {
	width: 100%;
	padding: 12px;
	margin-bottom: 1rem;
	border-radius: 8px;
	border: 1px solid #333;
	background: #000;
	color: #fff;
	font-size: 1rem;
	outline: none;
}
.login-box input:focus {
	border-color: var(--primary);
}

.login-box button {
	width: 100%;
	padding: 12px;
	border-radius: 8px;
	border: none;
	background: var(--primary);
	color: #fff;
	font-weight: 600;
	font-size: 1rem;
	cursor: pointer;
	margin-bottom: 10px;
}

.btn-text {
	background: transparent !important;
	color: #888 !important;
	font-size: 0.9rem !important;
}

.hint {
	font-size: 0.8rem;
	color: #ffd700 !important;
	margin-top: 1rem;
}

#login-message {
	color: #ff4444;
	margin-top: 10px;
	font-size: 0.9rem;
}

/* Feed Container */
#feed-container {
	height: 100vh;
	width: 100vw;
	position: relative;
	display: flex;
	flex-direction: column;
}

/* Top Bar */
.top-bar {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 100;
	padding: 10px 15px 30px; /* Extra padding bottom for gradient */
	display: flex;
	gap: 10px;
	background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent);
}

.search-box {
	flex: 1;
}
.search-box input {
	width: 100%;
	background: rgba(255, 255, 255, 0.15);
	border: none;
	padding: 8px 12px;
	border-radius: 20px;
	color: #fff;
	font-size: 0.9rem;
	backdrop-filter: blur(5px);
}
.search-box input::placeholder {
	color: rgba(255, 255, 255, 0.7);
}

.filter-dropdown select {
	background: rgba(255, 255, 255, 0.15);
	border: none;
	color: #fff;
	padding: 8px 12px;
	border-radius: 20px;
	font-size: 0.9rem;
	backdrop-filter: blur(5px);
	appearance: none; /* Remove default arrow */
	-webkit-appearance: none;
}

/* Video Scroller (Snap) */
.video-scroller {
	height: 100%;
	overflow-y: scroll;
	scroll-snap-type: y mandatory;
	scroll-behavior: smooth;
	scrollbar-width: none; /* Firefox */
}
.video-scroller::-webkit-scrollbar {
	display: none;
}

.video-item {
	height: 100vh;
	width: 100%;
	scroll-snap-align: start;
	position: relative;
	background: #000;
}

.video-wrapper {
	width: 100%;
	height: 100%;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}

video {
	width: 100%;
	height: 100%;
	object-fit: contain; /* Request: "khung hình giống tiktok, không cắt hay phóng" -> contain ensures full video visible inside frame */
	display: block;
}

/* Video Overlay Info */
.video-overlay {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	padding: 20px 15px 80px; /* Bottom padding for mobile nav bar home indicator */
	background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
	pointer-events: none; /* Let clicks pass through to video */
}

.video-info {
	text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
	pointer-events: auto;
}

.video-title {
	font-size: 1.1rem;
	margin-bottom: 8px;
	line-height: 1.3;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.video-tags {
	font-size: 0.9rem;
	color: var(--text-secondary);
	font-weight: 500;
}

/* Play Icon Animation */
.play-icon {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	font-size: 4rem;
	opacity: 0;
	transition: opacity 0.2s, transform 0.2s;
	pointer-events: none;
	text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

.paused .play-icon {
	opacity: 0.8;
	transform: translate(-50%, -50%) scale(1);
}

/* Loading */
.loading {
	position: fixed;
	bottom: 20px;
	left: 50%;
	transform: translateX(-50%);
	z-index: 200;
}

.spinner {
	width: 30px;
	height: 30px;
	border: 3px solid rgba(255, 255, 255, 0.3);
	border-radius: 50%;
	border-top-color: #fff;
	animation: spin 1s ease-in-out infinite;
}

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