/* ========
   RESET & BASE STYLES
   ======== */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
/* ========
   BODY & BACKGROUND ANIMATIONS
   ======== */
body {
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
	background: linear-gradient(135deg, #1e1e1e, #2d2d2d);
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	overflow: hidden;
}
/* Light mode background */
body.light-mode {
	background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
}
/* Floating background particles - responsive for both themes */
body::before {
	content: "";
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	/* Dark mode particles */
	background: radial-gradient(
			circle at 20% 50%,
			rgba(120, 119, 198, 0.15) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 80% 20%,
			rgba(255, 111, 97, 0.12) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 40% 80%,
			rgba(120, 119, 198, 0.13) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 90% 70%,
			rgba(255, 111, 97, 0.08) 0%,
			transparent 30%
		);
	animation: floatingBg 20s ease-in-out infinite;
	pointer-events: none;
	z-index: -1;
	transition: background 0.6s ease;
}
/* Light mode particles */
body.light-mode::before {
	background: radial-gradient(
			circle at 20% 50%,
			rgba(74, 144, 226, 0.08) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 80% 20%,
			rgba(255, 149, 0, 0.06) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 40% 80%,
			rgba(74, 144, 226, 0.07) 0%,
			transparent 50%
		),
		radial-gradient(
			circle at 90% 70%,
			rgba(255, 149, 0, 0.05) 0%,
			transparent 30%
		);
}
/* Floating animation for background particles */
@keyframes floatingBg {
	0%,
	100% {
		transform: translateY(0px) translateX(0px) rotate(0deg);
		opacity: 1;
	}
	25% {
		transform: translateY(-15px) translateX(10px) rotate(1deg);
		opacity: 0.8;
	}
	50% {
		transform: translateY(-5px) translateX(-5px) rotate(-0.5deg);
		opacity: 1;
	}
	75% {
		transform: translateY(10px) translateX(8px) rotate(0.8deg);
		opacity: 0.9;
	}
}
/* ========
   CALCULATOR CONTAINER
   ======== */
.container {
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 20px;
	/* Smooth entrance animation */
	animation: slideIn 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
/* Calculator entrance animation */
@keyframes slideIn {
	from {
		opacity: 0;
		transform: translateY(30px) scale(0.95);
	}
	to {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
}
/* Main calculator body */
.calculator {
	position: relative;
	background: rgba(20, 20, 20, 0.85);
	padding: 30px;
	border-radius: 30px;
	/* Enhanced shadow system for depth */
	box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
		inset 0 1px 0 rgba(255, 255, 255, 0.1),
		0 1px 0 rgba(255, 255, 255, 0.05);
	max-width: 380px;
	width: 100%;
	backdrop-filter: blur(20px);
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	z-index: 1;
	border: 1px solid rgba(255, 255, 255, 0.05);
}
/* Calculator hover effects */
.calculator:hover {
	transform: translateY(-2px);
	box-shadow: 0 25px 70px rgba(0, 0, 0, 0.5),
		inset 0 1px 0 rgba(255, 255, 255, 0.15),
		0 1px 0 rgba(255, 255, 255, 0.1);
}
/* Light mode calculator styling */
body.light-mode .calculator {
	background: rgba(255, 255, 255, 0.85);
	box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15),
		inset 0 1px 0 rgba(0, 0, 0, 0.05), 0 1px 0 rgba(255, 255, 255, 0.8);
	border: 1px solid rgba(0, 0, 0, 0.08);
}
body.light-mode .calculator:hover {
	box-shadow: 0 25px 70px rgba(0, 0, 0, 0.2),
		inset 0 1px 0 rgba(0, 0, 0, 0.08), 0 1px 0 rgba(255, 255, 255, 0.9);
}
/* ========
   TOP BAR & DROPDOWN
   ======== */
/* Top bar container */
.top-bar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 25px;
	/* Staggered entrance animation */
	animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
}
/* Fade in up animation */
@keyframes fadeInUp {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}
/* Dropdown container */
.dropdown {
	position: relative;
}
/* Dropdown select styling (arrow completely removed) */
#calculator-mode {
	background: linear-gradient(
		145deg,
		rgba(42, 42, 42, 0.9),
		rgba(31, 31, 31, 0.9)
	);
	color: #ffffff;
	border: none;
	padding: 8px 12px;
	border-radius: 12px;
	font-size: 0.9rem;
	cursor: pointer;
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
	width: 160px;
	outline: none;
	backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.1);
	/* Remove all dropdown arrows completely */
	appearance: none;
	-webkit-appearance: none;
	-moz-appearance: none;
	background-image: none !important;
}
/* Remove browser-specific dropdown arrows */
#calculator-mode::-ms-expand {
	display: none;
}
#calculator-mode::-webkit-inner-spin-button,
#calculator-mode::-webkit-outer-spin-button {
	-webkit-appearance: none;
	margin: 0;
}
/* Light mode dropdown styling */
body.light-mode #calculator-mode {
	background: rgba(255, 255, 255, 0.9);
	color: #000000;
	border: 1px solid rgba(0, 0, 0, 0.1);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}
/* Dropdown hover effects */
#calculator-mode:hover {
	transform: translateY(-3px) scale(1.02);
	box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
body.light-mode #calculator-mode:hover {
	box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}
/* Dropdown options styling */
#calculator-mode option {
	background: #2a2a2a;
	color: #ffffff;
}
body.light-mode #calculator-mode option {
	background: #ffffff;
	color: #000000;
}
/* ========
   DISPLAY AREA - ENHANCED TEXT STYLING
   ======== */
/* Main display container */
.display {
	background: rgba(50, 50, 50, 0.7);
	color: #ffffff;
	padding: 25px;
	border-radius: 20px;
	text-align: right;
	margin-bottom: 25px;
	overflow: hidden;
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.3),
		0 1px 0 rgba(255, 255, 255, 0.1);
	position: relative;
	backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.05);
	animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}
/* Shimmer effect on display */
.display::before {
	content: "";
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: linear-gradient(
		90deg,
		transparent,
		rgba(255, 255, 255, 0.05),
		transparent
	);
	transition: left 1s cubic-bezier(0.4, 0, 0.2, 1);
}
.display:hover::before {
	left: 100%;
}
/* Light mode display styling */
body.light-mode .display {
	background: rgba(245, 245, 245, 0.7);
	color: #2d2d2d;
	box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.1),
		0 1px 0 rgba(255, 255, 255, 0.8);
	border: 1px solid rgba(0, 0, 0, 0.05);
}
/* ENHANCED RESULT DISPLAY - Bold and Better Looking */
.result {
	font-size: 3rem;
	font-weight: 700; /* Bold weight for better visibility */
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4); /* Enhanced text shadow */
	letter-spacing: 0.5px; /* Better character spacing */
	line-height: 1.1; /* Optimized line height */
}
/* Light mode result styling */
body.light-mode .result {
	text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
	color: #1a1a1a; /* Deeper color for better contrast */
}
/* ENHANCED HISTORY DISPLAY - Bold and Better Looking */
.history {
	font-size: 1.2rem;
	font-weight: 600; /* Semi-bold for better readability */
	color: rgba(255, 255, 255, 0.8); /* Higher opacity */
	margin-bottom: 12px;
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	position: relative;
	letter-spacing: 0.3px; /* Better character spacing */
	text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); /* Subtle text shadow */
}
/* Light mode history styling */
body.light-mode .history {
	color: rgba(45, 45, 45, 0.8); /* Higher opacity for better visibility */
	text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}
/* Enhanced fade effect for overflow */
.history::after {
	content: "";
	position: absolute;
	top: 0;
	right: 0;
	width: 30px;
	height: 100%;
	background: linear-gradient(to left, rgba(50, 50, 50, 0.7), transparent);
	pointer-events: none;
}
body.light-mode .history::after {
	background: linear-gradient(to left, rgba(245, 245, 245, 0.7), transparent);
}
/* ========
   CALCULATOR BUTTONS
   ======== */
/* Button grid layout */
.buttons {
	display: grid;
	grid-template-columns: repeat(4, 72px);
	grid-template-rows: repeat(5, 72px);
	gap: 12px;
	justify-content: center;
	animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}
/* Base button styling */
.btn {
	width: 100%;
	height: 100%;
	font-size: 1.7rem;
	font-weight: 500; /* Medium weight for buttons */
	border: none;
	border-radius: 16px;
	cursor: pointer;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25),
		inset 0 1px 0 rgba(255, 255, 255, 0.1);
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
	backdrop-filter: blur(5px);
	border: 1px solid rgba(255, 255, 255, 0.05);
	overflow: hidden;
}
/* Ripple effect for buttons */
.btn::before {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0;
	height: 0;
	background: rgba(255, 255, 255, 0.1);
	border-radius: 50%;
	transform: translate(-50%, -50%);
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn:active::before {
	width: 200px;
	height: 200px;
}
/* Button hover effects */
.btn:hover {
	transform: translateY(-4px) scale(1.05);
	box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35),
		inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn:active {
	transform: translateY(-1px) scale(0.98);
	box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
/* Number buttons styling */
.number {
	background: linear-gradient(
		145deg,
		rgba(42, 42, 42, 0.9),
		rgba(31, 31, 31, 0.9)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}
body.light-mode .number {
	background: linear-gradient(
		145deg,
		rgba(255, 255, 255, 0.9),
		rgba(229, 229, 229, 0.9)
	);
	color: #2d2d2d;
	text-shadow: 0 1px 1px rgba(255, 255, 255, 0.5);
	border: 1px solid rgba(0, 0, 0, 0.05);
}
/* Operator buttons styling */
.operator,
.backspace,
.percent {
	background: linear-gradient(
		145deg,
		rgba(255, 111, 0, 0.95),
		rgba(230, 92, 0, 0.95)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
body.light-mode .operator,
body.light-mode .backspace,
body.light-mode .percent {
	background: linear-gradient(
		145deg,
		rgba(255, 149, 0, 0.95),
		rgba(232, 123, 0, 0.95)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
/* Clear button styling */
.clear {
	background: linear-gradient(
		145deg,
		rgba(102, 102, 102, 0.9),
		rgba(85, 85, 85, 0.9)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}
body.light-mode .clear {
	background: linear-gradient(
		145deg,
		rgba(153, 153, 153, 0.9),
		rgba(136, 136, 136, 0.9)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
/* Zero button (spans 2 columns) */
.zero {
	grid-column: span 2;
	border-radius: 16px;
}
/* Equals button styling */
.equal {
	background: linear-gradient(
		145deg,
		rgba(255, 111, 0, 0.95),
		rgba(230, 92, 0, 0.95)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
body.light-mode .equal {
	background: linear-gradient(
		145deg,
		rgba(255, 149, 0, 0.95),
		rgba(232, 123, 0, 0.95)
	);
	color: #ffffff;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
/* ========
   THEME TOGGLE SWITCH
   ======== */
/* Toggle container */
.toggle-container {
	display: flex;
	align-items: center;
	justify-content: flex-end;
	gap: 12px;
}
/* Hidden checkbox for toggle */
#theme-toggle {
	opacity: 0;
	height: 0;
	width: 0;
}
/* Main toggle switch container */
.toggle {
	position: relative;
	cursor: pointer;
	display: inline-block;
	width: 85px;
	height: 42px;
	background: #211042;
	border-radius: 25px;
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	overflow: hidden;
	box-shadow: 0 4px 15px rgba(33, 16, 66, 0.4),
		inset 0 1px 0 rgba(255, 255, 255, 0.1);
	border: 1px solid rgba(255, 255, 255, 0.1);
}
.toggle:hover {
	transform: scale(1.05);
	box-shadow: 0 6px 20px rgba(33, 16, 66, 0.5);
}
/* Moon/Sun button inside toggle */
.toggle-button {
	position: absolute;
	display: inline-block;
	top: 3px;
	left: 3px;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	background: #faeaf1;
	overflow: hidden;
	box-shadow: 0 0 20px 3px rgba(255, 255, 255, 0.8),
		0 2px 4px rgba(0, 0, 0, 0.2);
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
/* Moon craters styling */
.crater {
	position: absolute;
	display: inline-block;
	background: #faeaf1;
	border-radius: 50%;
	transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.crater-1 {
	background: #fffff9;
	width: 36px;
	height: 36px;
	left: 4px;
	bottom: 4px;
}
.crater-2 {
	width: 8px;
	height: 8px;
	top: -3px;
	left: 19px;
}
.crater-3 {
	width: 6px;
	height: 6px;
	top: 9px;
	right: -2px;
}
.crater-4 {
	width: 4px;
	height: 4px;
	top: 11px;
	left: 13px;
}
.crater-5 {
	width: 6px;
	height: 6px;
	top: 17px;
	left: 20px;
}
.crater-6 {
	width: 4px;
	height: 4px;
	top: 20px;
	left: 9px;
}
.crater-7 {
	width: 5px;
	height: 5px;
	bottom: 2px;
	left: 15px;
}
/* Stars/clouds elements */
.star {
	position: absolute;
	display: inline-block;
	border-radius: 50%;
	background: #fff;
	box-shadow: 1px 0 2px 1px rgba(255, 255, 255, 0.8);
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.star-1 {
	width: 3px;
	height: 3px;
	right: 38px;
	bottom: 17px;
}
.star-2 {
	width: 3px;
	height: 3px;
	right: 30px;
	top: 5px;
}
.star-3 {
	width: 2px;
	height: 2px;
	right: 25px;
	bottom: 7px;
}
.star-4 {
	width: 1px;
	height: 1px;
	right: 17px;
	bottom: 21px;
}
.star-5 {
	width: 2px;
	height: 2px;
	right: 5px;
	bottom: 15px;
}
/* Shooting stars animation */
.star-6,
.star-7,
.star-8 {
	width: 5px;
	height: 1px;
	border-radius: 1px;
	transform: rotate(-45deg);
	box-shadow: 3px 0px 3px 0px rgba(255, 255, 255, 0.9);
	animation-name: travel;
	animation-duration: 2s;
	animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
	animation-iteration-count: infinite;
}
.star-6 {
	right: 13px;
	bottom: 13px;
	animation-delay: -2s;
}
.star-7 {
	right: 21px;
	bottom: 25px;
}
.star-8 {
	right: 38px;
	top: 5px;
	animation-delay: -4s;
}
/* Shooting stars travel animation */
@keyframes travel {
	0% {
		transform: rotate(-45deg) translateX(30px);
		opacity: 0;
	}
	20% {
		opacity: 1;
	}
	50% {
		transform: rotate(-45deg) translateX(-10px);
		box-shadow: 3px 0px 4px 1px rgba(255, 255, 255, 0.9);
	}
	100% {
		transform: rotate(-45deg) translateX(-15px);
		width: 1px;
		height: 1px;
		opacity: 0;
		box-shadow: none;
	}
}
/* Light mode toggle styling */
#theme-toggle:checked + .toggle {
	background: #24d7f7;
	box-shadow: 0 4px 15px rgba(36, 215, 247, 0.4);
}
#theme-toggle:checked + .toggle:hover {
	box-shadow: 0 6px 20px rgba(36, 215, 247, 0.5);
}
#theme-toggle:checked + .toggle .toggle-button {
	background: #f7ffff;
	transform: translateX(43px);
	box-shadow: 0 0 20px 3px rgba(255, 255, 255, 0.9),
		0 2px 4px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .toggle-button .crater {
	transform: rotate(-45deg) translateX(30px);
}
#theme-toggle:checked + .toggle .star {
	animation: move 3s infinite ease-in-out;
	transform: none;
	box-shadow: none;
}
/* Cloud formations in light mode */
#theme-toggle:checked + .toggle .star-1 {
	width: 17px;
	height: 5px;
	border-radius: 5px;
	background: #fff;
	left: 9px;
	top: 11px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-2 {
	width: 6px;
	height: 6px;
	background: #fff;
	left: 11px;
	top: 10px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-3 {
	width: 7px;
	height: 7px;
	background: #fff;
	left: 15px;
	top: 9px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-4 {
	width: 7px;
	height: 7px;
	background: #fff;
	left: 19px;
	top: 9px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-5 {
	width: 26px;
	height: 7px;
	border-radius: 7px;
	background: #fff;
	left: 13px;
	bottom: 9px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-6 {
	width: 8px;
	height: 8px;
	background: #fff;
	border-radius: 50%;
	left: 16px;
	bottom: 9px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-7 {
	width: 11px;
	height: 11px;
	background: #fff;
	border-radius: 50%;
	left: 22px;
	bottom: 9px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
#theme-toggle:checked + .toggle .star-8 {
	width: 9px;
	height: 9px;
	background: #fff;
	border-radius: 50%;
	left: 30px;
	top: 25px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
/* Cloud floating animation */
@keyframes move {
	0% {
		transform: translateX(0);
	}
	25% {
		transform: translateX(2px);
	}
	50% {
		transform: translateX(0);
	}
	75% {
		transform: translateX(-2px);
	}
	100% {
		transform: translateX(0);
	}
}
/* ========
   HISTORY BUTTON & PANEL
   ======== */
/* History toggle button */
.history-btn {
	width: 36px;
	height: 36px;
	border-radius: 50%;
	border: none;
	background: linear-gradient(
		145deg,
		rgba(74, 144, 226, 0.95),
		rgba(53, 122, 189, 0.95)
	);
	color: #fff;
	font-size: 1rem;
	cursor: pointer;
	box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4),
		inset 0 1px 0 rgba(255, 255, 255, 0.2);
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	z-index: 20;
	flex-shrink: 0;
	backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.1);
	/* Added for emoji alignment */
	display: flex;
	align-items: center;
	justify-content: center;
}
body.light-mode .history-btn {
	background: linear-gradient(
		145deg,
		rgba(91, 160, 242, 0.95),
		rgba(74, 144, 226, 0.95)
	);
	box-shadow: 0 4px 15px rgba(74, 144, 226, 0.5);
}
.history-btn:hover {
	transform: scale(1.2) translateY(-2px);
	box-shadow: 0 8px 25px rgba(74, 144, 226, 0.6),
		inset 0 1px 0 rgba(255, 255, 255, 0.3);
	animation: bounce 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
/* Bounce animation for history button */
@keyframes bounce {
	0%,
	100% {
		transform: scale(1.2) translateY(-2px);
	}
	50% {
		transform: scale(1.25) translateY(-4px);
	}
}
.history-btn:active {
	transform: scale(1.1);
}
/* History panel (slide-out drawer) */
.history-panel {
	position: fixed;
	top: 50%;
	right: -340px;
	transform: translateY(-50%);
	width: 300px;
	height: 480px;
	padding: 25px;
	backdrop-filter: blur(25px);
	background: rgba(20, 20, 20, 0.85);
	border-radius: 25px;
	box-shadow: -10px 0 50px rgba(0, 0, 0, 0.6),
		inset 0 1px 0 rgba(255, 255, 255, 0.1);
	transition: right 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	display: flex;
	flex-direction: column;
	overflow: hidden;
	color: #fff;
	z-index: 25;
	border: 1px solid rgba(255, 255, 255, 0.1);
	visibility: hidden;
}
body.light-mode .history-panel {
	background: rgba(255, 255, 255, 0.85);
	box-shadow: -10px 0 50px rgba(0, 0, 0, 0.25),
		inset 0 1px 0 rgba(0, 0, 0, 0.05);
	color: #2d2d2d;
	border: 1px solid rgba(0, 0, 0, 0.1);
}
/* Show history panel */
.history-panel.open {
	right: 25px;
	visibility: visible;
}
/* History panel header */
.history-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 25px;
	font-weight: 600;
	font-size: 1.2rem;
	padding-bottom: 20px;
	border-bottom: 2px solid rgba(74, 144, 226, 0.3);
	animation: slideInFromTop 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
/* Slide in from top animation */
@keyframes slideInFromTop {
	from {
		opacity: 0;
		transform: translateY(-20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}
/* Keyboard hint styling */
.keyboard-hint {
	font-size: 0.7rem;
	opacity: 0.6;
	font-weight: 400;
	transition: opacity 0.3s ease;
}
.history-header:hover .keyboard-hint {
	opacity: 0.9;
}
/* Clear history button */
#history-clear {
	background: linear-gradient(
		145deg,
		rgba(231, 76, 60, 0.95),
		rgba(192, 57, 43, 0.95)
	);
	border: none;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	font-size: 1.2rem;
	cursor: pointer;
	color: white;
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4),
		inset 0 1px 0 rgba(255, 255, 255, 0.2);
	backdrop-filter: blur(5px);
	border: 1px solid rgba(255, 255, 255, 0.1);
}
#history-clear:hover {
	transform: scale(1.3) rotate(-20deg);
	box-shadow: 0 8px 30px rgba(231, 76, 60, 0.6);
	background: linear-gradient(
		145deg,
		rgba(255, 107, 90, 0.95),
		rgba(231, 76, 60, 0.95)
	);
}
#history-clear:active {
	transform: scale(1.1);
}
/* History list container */
#history-list {
	list-style: none;
	flex: 1;
	overflow-y: auto;
	padding-right: 15px;
	margin-right: -10px;
}
/* Custom scrollbar styling */
#history-list::-webkit-scrollbar {
	width: 8px;
}
#history-list::-webkit-scrollbar-track {
	background: rgba(255, 255, 255, 0.05);
	border-radius: 10px;
}
#history-list::-webkit-scrollbar-thumb {
	background: linear-gradient(
		180deg,
		rgba(74, 144, 226, 0.8),
		rgba(53, 122, 189, 0.8)
	);
	border-radius: 10px;
	border: 1px solid rgba(255, 255, 255, 0.1);
}
#history-list::-webkit-scrollbar-thumb:hover {
	background: linear-gradient(
		180deg,
		rgba(74, 144, 226, 1),
		rgba(53, 122, 189, 1)
	);
}
/* Individual history items */
#history-list li {
	padding: 15px;
	margin-bottom: 12px;
	border-radius: 15px;
	cursor: pointer;
	background: rgba(255, 255, 255, 0.03);
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	font-size: 0.95rem;
	border-left: 3px solid transparent;
	animation: slideInFromRight 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	animation-fill-mode: both;
	backdrop-filter: blur(5px);
	border: 1px solid rgba(255, 255, 255, 0.05);
	position: relative;
	overflow: hidden;
}
/* Slide in from right animation */
@keyframes slideInFromRight {
	from {
		opacity: 0;
		transform: translateX(30px);
	}
	to {
		opacity: 1;
		transform: translateX(0);
	}
}
/* Shimmer effect on history items */
#history-list li::before {
	content: "";
	position: absolute;
	top: 0;
	left: -100%;
	width: 100%;
	height: 100%;
	background: linear-gradient(
		90deg,
		transparent,
		rgba(74, 144, 226, 0.1),
		transparent
	);
	transition: left 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
#history-list li:hover::before {
	left: 100%;
}
body.light-mode #history-list li {
	background: rgba(0, 0, 0, 0.03);
	border: 1px solid rgba(0, 0, 0, 0.05);
}
#history-list li:hover {
	background: rgba(74, 144, 226, 0.15);
	border-left: 4px solid #4a90e2;
	transform: translateX(-8px) scale(1.02);
	box-shadow: 8px 8px 25px rgba(74, 144, 226, 0.3);
}
/* Staggered animation delays for history items */
#history-list li:nth-child(1) {
	animation-delay: 0.1s;
}
#history-list li:nth-child(2) {
	animation-delay: 0.2s;
}
#history-list li:nth-child(3) {
	animation-delay: 0.3s;
}
#history-list li:nth-child(4) {
	animation-delay: 0.4s;
}
#history-list li:nth-child(5) {
	animation-delay: 0.5s;
}
/* ========
   BMI CALCULATOR STYLES
   ======== */
/* BMI mode visibility classes */
.bmi-hidden {
	display: none;
	opacity: 0;
}
.bmi-visible {
	display: block;
	opacity: 1;
	animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}

/* BMI display area styling */
.bmi-display-area {
	text-align: center;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	min-height: 120px;
}

/* BMI inputs styling - CORRECTED */
.bmi-inputs {
	display: flex;
	flex-direction: row;
	gap: 15px;
	margin-bottom: 25px;
	width: 100%;
	justify-content: center;
	align-items: center;
}

.bmi-inputs input {
	flex: 1;
	min-width: 0;
	width: 100%;
	max-width: 150px;
	padding: 16px 12px;
	border: none;
	border-radius: 16px;
	background: rgba(255, 255, 255, 0.08);
	color: #ffffff;
	font-size: 1rem;
	font-weight: 500;
	text-align: center;
	outline: none;
	backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.1);
	box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
	appearance: none;
	-webkit-appearance: none;
	-moz-appearance: textfield;
}

.bmi-inputs input::-webkit-outer-spin-button,
.bmi-inputs input::-webkit-inner-spin-button {
	-webkit-appearance: none;
	margin: 0;
}

.bmi-inputs input::placeholder {
	color: rgba(255, 255, 255, 0.6);
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
	opacity: 1;
}

.bmi-inputs input:focus {
	background: rgba(255, 255, 255, 0.12);
	border: 1px solid rgba(255, 255, 255, 0.2);
	transform: scale(1.02);
	box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3),
		0 0 20px rgba(255, 255, 255, 0.1);
}

/* Light mode BMI inputs */
body.light-mode .bmi-inputs input {
	background: rgba(0, 0, 0, 0.08);
	color: #2d2d2d;
	border: 1px solid rgba(0, 0, 0, 0.1);
	box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
	text-shadow: 0 1px 1px rgba(255, 255, 255, 0.5);
}

body.light-mode .bmi-inputs input::placeholder {
	color: rgba(45, 45, 45, 0.6);
	text-shadow: 0 1px 1px rgba(255, 255, 255, 0.5);
}

body.light-mode .bmi-inputs input:focus {
	background: rgba(0, 0, 0, 0.12);
	border: 1px solid rgba(0, 0, 0, 0.2);
	box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15), 0 0 20px rgba(0, 0, 0, 0.1);
}

/* BMI result display */
.bmi-result {
	font-size: 3rem;
	font-weight: 700;
	text-align: center;
	margin-bottom: 10px;
	color: #ffc107; /* Amber color for BMI result */
	text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
	letter-spacing: 0.5px;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
body.light-mode .bmi-result {
	text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
	color: #ff8f00; /* Darker amber for light mode */
}

/* BMI status display */
.bmi-status {
	font-size: 1.2rem;
	font-weight: 600;
	text-align: center;
	color: rgba(255, 255, 255, 0.8);
	text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
	letter-spacing: 0.3px;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
body.light-mode .bmi-status {
	color: rgba(45, 45, 45, 0.8);
	text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}

/* BMI button container */
.bmi-button-container {
	display: flex;
	justify-content: center;
	animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

/* BMI calculate button styling */
.bmi-calculate-btn {
	width: 100%;
	height: 72px;
	font-size: 1.4rem;
	font-weight: 600;
}

/* ========
   MOBILE RESPONSIVENESS (BMI additions)
   ======== */
@media (max-width: 480px) {
	/* Hide background particles on mobile for performance */
	body::before {
		display: none;
	}
	/* Mobile calculator sizing */
	.calculator {
		padding: 20px;
		max-width: 320px;
		border-radius: 25px;
	}
	/* Mobile display adjustments */
	.display {
		padding: 20px;
		border-radius: 18px;
	}
	.result {
		font-size: 2.4rem; /* Slightly smaller for mobile */
	}
	.history {
		font-size: 1rem;
	}
	/* Mobile button grid */
	.buttons {
		grid-template-columns: repeat(4, 62px);
		grid-template-rows: repeat(5, 62px);
		gap: 10px;
	}
	.btn {
		font-size: 1.5rem;
		border-radius: 14px;
	}
	/* Mobile toggle adjustments */
	.toggle-container {
		gap: 10px;
	}
	.toggle {
		width: 75px;
		height: 38px;
	}
	.toggle-button {
		width: 32px;
		height: 32px;
	}
	#theme-toggle:checked + .toggle .toggle-button {
		transform: translateX(37px);
	}
	/* Mobile history panel */
	.history-panel {
		width: 280px;
		height: 420px;
		right: -300px;
		padding: 20px;
	}
	.history-panel.open {
		right: 15px;
	}
	.history-btn {
		width: 32px;
		height: 32px;
		font-size: 0.9rem;
	}
	#history-list li {
		font-size: 0.85rem;
		padding: 12px;
	}
	/* Hide keyboard hint on mobile */
	.keyboard-hint {
		display: none;
	}

	/* Mobile BMI adjustments */
	.bmi-inputs {
		flex-direction: column;
		gap: 12px;
		margin-bottom: 20px;
	}

	.bmi-inputs input {
		max-width: none;
		width: 100%;
		padding: 14px 12px;
		font-size: 0.95rem;
	}

	.bmi-result {
		font-size: 2.4rem;
	}

	.bmi-status {
		font-size: 1.1rem;
	}

	.bmi-calculate-btn {
		height: 62px;
		font-size: 1.2rem;
	}
}