/* ------------------------------------------------------------------ */
/* Custom properties                                                  */
/* ------------------------------------------------------------------ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&display=swap');

:root {
	--bg: #0f0f1a;
	--bg-surface: #1a1a2e;
	--bg-card: #1e2433;
	--bg-hover: #252a3a;
	--bg-input: #141422;
	--text: #e5e7eb;
	--text-muted: #8b919d;
	--text-heading: #f0f1f4;
	--border: #2d3748;
	--border-light: #242938;

	--accent-lime: #CCDB3C;
	--accent-cyan: #13BCD9;
	--accent-purple: #6959A6;

	--accent: var(--accent-cyan);
	--accent-dim: #0f9ab3;
	--danger: #e05555;
	--danger-dim: #a33;
	--success: #4caf50;

	--priority-critical: #e53935;
	--priority-high: #fb8c00;
	--priority-medium: #fdd835;
	--priority-low: #42a5f5;
	--priority-none: #4a5568;

	--overdue: #e05555;

	--gradient-accent: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
	--gradient-lime: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
	--gradient-warm: linear-gradient(135deg, var(--accent-purple), #e05555);
	--gradient-surface: linear-gradient(180deg, rgba(26, 26, 46, 0.95), rgba(30, 36, 51, 0.95));
	--gradient-card: linear-gradient(145deg, rgba(30, 36, 51, 0.8), rgba(26, 26, 46, 0.6));
	--gradient-glow: radial-gradient(ellipse at 50% 0%, rgba(19, 188, 217, 0.15) 0%, transparent 60%);

	--radius: 10px;
	--radius-lg: 16px;
	--radius-xl: 24px;
	--spacing-xs: 4px;
	--spacing-sm: 8px;
	--spacing-md: 16px;
	--spacing-lg: 24px;
	--spacing-xl: 32px;

	--header-height: 60px;
	--tab-height: 64px;
	--toast-gap: 8px;

	--transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
	--transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

	--font-sans: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

	--shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
	--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
	--shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
	--shadow-glow-cyan: 0 0 20px rgba(19, 188, 217, 0.2);
	--shadow-glow-purple: 0 0 20px rgba(105, 89, 166, 0.2);
}

/* ------------------------------------------------------------------ */
/* Reset and base                                                     */
/* ------------------------------------------------------------------ */

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

html {
	font-size: 16px;
	-webkit-tap-highlight-color: transparent;
	scroll-behavior: smooth;
}

body {
	font-family: var(--font-sans);
	background: var(--bg);
	color: var(--text);
	line-height: 1.5;
	min-height: 100dvh;
	overflow-x: hidden;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	padding-bottom: var(--tab-height);
}

body::before {
	content: '';
	position: fixed;
	inset: 0;
	background: var(--gradient-glow);
	pointer-events: none;
	z-index: 0;
}

button, input, select, textarea {
	font: inherit;
	color: inherit;
	border: none;
	background: none;
	outline: none;
}

a {
	color: inherit;
	text-decoration: none;
}

/* ------------------------------------------------------------------ */
/* Header                                                             */
/* ------------------------------------------------------------------ */

#app-header {
	position: sticky;
	top: 0;
	z-index: 100;
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: var(--header-height);
	padding: 0 var(--spacing-lg);
	background: var(--gradient-surface);
	backdrop-filter: blur(20px) saturate(1.5);
	-webkit-backdrop-filter: blur(20px) saturate(1.5);
	border-bottom: 1px solid rgba(45, 55, 72, 0.6);
}

#app-header::after {
	content: '';
	position: absolute;
	bottom: -1px;
	left: 0;
	right: 0;
	height: 2px;
	background: var(--gradient-accent);
	opacity: 0.6;
}

#app-header h1 {
	font-size: 1.5rem;
	font-weight: 800;
	background: var(--gradient-accent);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
	letter-spacing: -0.02em;
}

.header-actions {
	display: flex;
	gap: var(--spacing-sm);
}

.header-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 42px;
	height: 42px;
	border-radius: var(--radius);
	cursor: pointer;
	transition: all var(--transition);
	color: var(--text-muted);
	position: relative;
}

.header-btn:hover,
.header-btn:focus-visible {
	background: var(--bg-hover);
	color: var(--text);
	transform: translateY(-1px);
}

.header-btn:active {
	transform: translateY(0) scale(0.95);
}

.header-btn.btn-primary {
	background: var(--gradient-accent);
	color: #fff;
	box-shadow: var(--shadow-glow-cyan);
}

.header-btn.btn-primary:hover {
	box-shadow: 0 0 30px rgba(19, 188, 217, 0.35);
	transform: translateY(-2px);
}

.header-btn.btn-primary:active {
	transform: translateY(0) scale(0.95);
}

/* ------------------------------------------------------------------ */
/* Main layout                                                        */
/* ------------------------------------------------------------------ */

#app-main {
	position: relative;
	z-index: 1;
	display: grid;
	grid-template-columns: 1fr;
	min-height: calc(100dvh - var(--header-height) - var(--tab-height));
	padding-bottom: var(--spacing-xl);
}

#category-sidebar {
	display: none;
}

@media (min-width: 769px) {
	#app-main {
		grid-template-columns: 260px 1fr;
	}

	#category-sidebar {
		display: block;
		border-right: 1px solid var(--border);
		background: var(--gradient-surface);
		backdrop-filter: blur(10px);
		padding: var(--spacing-lg) var(--spacing-md);
		overflow-y: auto;
		max-height: calc(100dvh - var(--header-height) - var(--tab-height));
		position: sticky;
		top: var(--header-height);
	}

	#category-sidebar .sidebar-category {
		display: flex;
		align-items: center;
		justify-content: space-between;
		padding: var(--spacing-sm) var(--spacing-md);
		border-radius: var(--radius);
		cursor: pointer;
		transition: all var(--transition);
		font-size: 0.9rem;
		font-weight: 500;
		margin-bottom: 2px;
	}

	#category-sidebar .sidebar-category:hover {
		background: var(--bg-hover);
		transform: translateX(4px);
	}

	#category-sidebar .sidebar-category.active {
		background: var(--gradient-accent);
		color: #fff;
		box-shadow: var(--shadow-glow-cyan);
	}

	#category-sidebar .sidebar-category .count {
		font-size: 0.75rem;
		font-weight: 600;
		color: var(--text-muted);
		background: rgba(15, 15, 26, 0.4);
		padding: 2px 10px;
		border-radius: 20px;
		min-width: 28px;
		text-align: center;
	}

	#category-sidebar .sidebar-category.active .count {
		color: #fff;
		background: rgba(255,255,255,0.2);
	}

	.fab {
		display: none !important;
	}
}

#todo-container {
	padding: var(--spacing-sm);
	max-width: 720px;
	width: 100%;
	margin: 0 auto;
}

@media (min-width: 480px) {
	#todo-container {
		padding: var(--spacing-md);
	}
}

/* ------------------------------------------------------------------ */
/* Tab bar                                                            */
/* ------------------------------------------------------------------ */

#tab-bar {
	position: fixed;
	bottom: 0;
	left: 0;
	right: 0;
	z-index: 100;
	display: flex;
	height: var(--tab-height);
	background: var(--gradient-surface);
	backdrop-filter: blur(20px) saturate(1.5);
	-webkit-backdrop-filter: blur(20px) saturate(1.5);
	border-top: 1px solid rgba(45, 55, 72, 0.6);
}

#tab-bar::before {
	content: '';
	position: absolute;
	top: -1px;
	left: 0;
	right: 0;
	height: 1px;
	background: var(--gradient-accent);
	opacity: 0.3;
}

.tab {
	flex: 1;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 3px;
	font-size: 0.6rem;
	font-weight: 600;
	color: var(--text-muted);
	cursor: pointer;
	transition: all var(--transition);
	position: relative;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}

.tab svg {
	width: 20px;
	height: 20px;
	transition: all var(--transition);
}

.tab.active {
	color: var(--accent-cyan);
}

.tab.active svg {
	filter: drop-shadow(0 0 6px rgba(19, 188, 217, 0.5));
}

.tab.active::after {
	content: '';
	position: absolute;
	top: 0;
	left: 20%;
	right: 20%;
	height: 2px;
	background: var(--gradient-accent);
	border-radius: 0 0 2px 2px;
}

.tab:hover {
	color: var(--text);
}

.tab:hover svg {
	transform: translateY(-2px);
}

.tab[data-filter="upcoming"].active {
	color: var(--accent-lime);
}

.tab[data-filter="upcoming"].active svg {
	filter: drop-shadow(0 0 6px rgba(204, 219, 60, 0.5));
}

.tab[data-filter="upcoming"].active::after {
	background: linear-gradient(90deg, var(--accent-lime), var(--accent-cyan));
}

.tab[data-filter="overdue"].active {
	color: var(--overdue);
}

.tab[data-filter="overdue"].active svg {
	filter: drop-shadow(0 0 6px rgba(224, 85, 85, 0.5));
}

.tab[data-filter="overdue"].active::after {
	background: linear-gradient(90deg, var(--danger), var(--accent-purple));
}

/* ------------------------------------------------------------------ */
/* Category group                                                     */
/* ------------------------------------------------------------------ */

.category-group {
	margin-bottom: var(--spacing-lg);
	animation: fadeSlideUp 0.3s ease both;
}

@keyframes fadeSlideUp {
	from {
		opacity: 0;
		transform: translateY(12px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.category-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--spacing-sm) var(--spacing-xs);
	cursor: pointer;
	user-select: none;
	transition: all var(--transition);
	border-radius: var(--radius);
}

.category-header:hover {
	background: rgba(19, 188, 217, 0.05);
}

.category-header h2 {
	font-size: 0.8rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--accent-lime);
}

.category-header .chevron {
	width: 18px;
	height: 18px;
	transition: transform var(--transition-bounce);
	color: var(--text-muted);
}

.category-header.collapsed .chevron {
	transform: rotate(-90deg);
}

.category-header.collapsed + .category-items {
	display: none;
}

/* ------------------------------------------------------------------ */
/* Todo card                                                          */
/* ------------------------------------------------------------------ */

.todo-card {
	display: flex;
	align-items: flex-start;
	gap: var(--spacing-sm);
	padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-md);
	background: var(--gradient-card);
	border-radius: var(--radius-lg);
	margin-bottom: var(--spacing-sm);
	cursor: pointer;
	transition: all var(--transition);
	border: 1px solid rgba(45, 55, 72, 0.4);
	border-left: 3px solid var(--priority-none);
	position: relative;
	overflow: hidden;
	max-width: 100%;
}

@media (min-width: 480px) {
	.todo-card {
		gap: var(--spacing-md);
		padding: var(--spacing-md);
	}
}

.todo-card::before {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(135deg, rgba(19, 188, 217, 0.03), transparent);
	opacity: 0;
	transition: opacity var(--transition);
	pointer-events: none;
}

.todo-card:hover {
	border-color: rgba(19, 188, 217, 0.2);
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.todo-card:hover::before {
	opacity: 1;
}

.todo-card:active {
	transform: translateY(0) scale(0.995);
}

.todo-card.priority-4 { border-left-color: var(--priority-critical); }
.todo-card.priority-3 { border-left-color: var(--priority-high); }
.todo-card.priority-2 { border-left-color: var(--priority-medium); }
.todo-card.priority-1 { border-left-color: var(--priority-low); }
.todo-card.priority-0 { border-left-color: var(--priority-none); }

.todo-card::after {
	content: '';
	position: absolute;
	inset: 0;
	pointer-events: none;
	opacity: 0.07;
}

.todo-card.priority-4::after { background: linear-gradient(135deg, var(--priority-critical), transparent 60%); }
.todo-card.priority-3::after { background: linear-gradient(135deg, var(--priority-high), transparent 60%); }
.todo-card.priority-2::after { background: linear-gradient(135deg, var(--priority-medium), transparent 60%); }
.todo-card.priority-1::after { background: linear-gradient(135deg, var(--priority-low), transparent 60%); }

.todo-card.done {
	opacity: 0.45;
}

.todo-card.done:hover {
	opacity: 0.65;
}

.todo-card.done .todo-heading {
	text-decoration: line-through;
	text-decoration-color: var(--text-muted);
}

.todo-card.overdue {
	border-left-color: var(--overdue);
}

.todo-card.overdue::before {
	background: linear-gradient(135deg, rgba(224, 85, 85, 0.05), transparent);
	opacity: 1;
}

.todo-card.overdue .todo-due {
	color: var(--overdue);
	font-weight: 700;
}

/* ------------------------------------------------------------------ */
/* Checkbox                                                           */
/* ------------------------------------------------------------------ */

.todo-check {
	flex-shrink: 0;
	width: 26px;
	height: 26px;
	border: 2px solid var(--border);
	border-radius: 50%;
	overflow: hidden;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: all var(--transition-bounce);
	margin-top: 2px;
	position: relative;
}

.todo-check:hover {
	border-color: var(--accent-cyan);
	box-shadow: 0 0 12px rgba(19, 188, 217, 0.25);
	transform: scale(1.1);
}

.todo-card.done .todo-check {
	background: var(--accent-cyan);
	border-color: var(--accent-cyan);
	box-shadow: var(--shadow-glow-cyan);
}

.todo-check svg {
	width: 14px;
	height: 14px;
	opacity: 0;
	transform: scale(0);
	transition: all var(--transition-bounce);
	stroke: #fff;
	stroke-width: 3;
	fill: none;
	stroke-linecap: round;
	stroke-linejoin: round;
}

.todo-card.done .todo-check svg {
	opacity: 1;
	transform: scale(1);
}

.todo-body {
	flex: 1;
	min-width: 0;
}

.todo-heading {
	font-size: 1rem;
	font-weight: 600;
	color: var(--text-heading);
	margin-bottom: var(--spacing-xs);
}

.todo-meta {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-sm);
	font-size: 0.8rem;
	color: var(--text-muted);
}

.todo-meta span {
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

.todo-meta .todo-due svg,
.todo-meta .todo-reminders svg,
.todo-meta .todo-category svg {
	width: 14px;
	height: 14px;
	opacity: 0.6;
}

/* ------------------------------------------------------------------ */
/* Priority badge                                                     */
/* ------------------------------------------------------------------ */

.priority-badge {
	display: inline-flex;
	align-items: center;
	gap: 3px;
	font-size: 0.7rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	padding: 2px 8px;
	border-radius: 20px;
}

.priority-badge.p-4 { background: rgba(229, 57, 53, 0.2); color: var(--priority-critical); }
.priority-badge.p-3 { background: rgba(251, 140, 0, 0.2); color: var(--priority-high); }
.priority-badge.p-2 { background: rgba(253, 216, 53, 0.2); color: var(--priority-medium); }
.priority-badge.p-1 { background: rgba(66, 165, 245, 0.2); color: var(--priority-low); }
.priority-badge.p-0 { background: rgba(74, 85, 104, 0.2); color: var(--priority-none); }

/* ------------------------------------------------------------------ */
/* Floating action button                                             */
/* ------------------------------------------------------------------ */

.fab {
	position: fixed;
	bottom: calc(var(--tab-height) + var(--spacing-md));
	right: var(--spacing-md);
	z-index: 90;
	width: 58px;
	height: 58px;
	border-radius: 50%;
	background: var(--gradient-accent);
	color: #fff;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
	transition: all var(--transition-bounce);
	line-height: 1;
}

.fab svg {
	width: 26px;
	height: 26px;
	transition: transform var(--transition-bounce);
}

.fab:hover {
	transform: scale(1.1) translateY(-2px);
	box-shadow: var(--shadow-lg), 0 0 40px rgba(19, 188, 217, 0.4);
}

.fab:hover svg {
	transform: rotate(90deg);
}

.fab:active {
	transform: scale(0.95);
}

@keyframes fabPulse {
	0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(19, 188, 217, 0.4); }
	50% { box-shadow: var(--shadow-lg), 0 0 0 12px rgba(19, 188, 217, 0); }
}

.fab {
	animation: fabPulse 3s ease-in-out infinite;
}

.fab:hover {
	animation: none;
}

/* ------------------------------------------------------------------ */
/* Modal overlay                                                      */
/* ------------------------------------------------------------------ */

.modal-overlay {
	position: fixed;
	inset: 0;
	z-index: 200;
	background: rgba(10, 10, 20, 0.7);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	display: flex;
	align-items: flex-end;
	justify-content: center;
	transition: opacity var(--transition);
}

.modal-overlay.hidden {
	display: none;
}

.modal-panel {
	background: var(--bg-surface);
	border-radius: var(--radius-xl) var(--radius-xl) 0 0;
	width: 100%;
	max-width: 560px;
	max-height: 90dvh;
	overflow-y: auto;
	padding: var(--spacing-lg);
	animation: modal-slide-up 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
	border: 1px solid rgba(45, 55, 72, 0.6);
	border-bottom: none;
	position: relative;
}

.modal-panel::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: var(--gradient-accent);
	border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

@media (min-width: 769px) {
	.modal-overlay {
		align-items: center;
	}

	.modal-panel {
		border-radius: var(--radius-xl);
		max-height: 80dvh;
		border-bottom: 1px solid rgba(45, 55, 72, 0.6);
		box-shadow: var(--shadow-lg);
	}

	.modal-panel::before {
		border-radius: var(--radius-xl) var(--radius-xl) 0 0;
	}
}

@keyframes modal-slide-up {
	from {
		transform: translateY(40px);
		opacity: 0;
	}
	to {
		transform: translateY(0);
		opacity: 1;
	}
}

.modal-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: var(--spacing-lg);
	padding-top: var(--spacing-xs);
}

.modal-header h2 {
	font-size: 1.2rem;
	font-weight: 700;
	color: var(--text-heading);
}

.modal-close {
	width: 36px;
	height: 36px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	color: var(--text-muted);
	transition: all var(--transition);
}

.modal-close svg {
	width: 18px;
	height: 18px;
}

.modal-close:hover {
	background: rgba(224, 85, 85, 0.15);
	color: var(--danger);
	transform: rotate(90deg);
}

/* ------------------------------------------------------------------ */
/* Form elements                                                      */
/* ------------------------------------------------------------------ */

.form-group {
	margin-bottom: var(--spacing-md);
}

.form-group label {
	display: block;
	font-size: 0.75rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--accent-lime);
	margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
	width: 100%;
	padding: 10px var(--spacing-md);
	background: var(--bg-input);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	color: var(--text);
	font-size: 0.95rem;
	transition: all var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
	border-color: var(--accent-cyan);
	box-shadow: 0 0 0 3px rgba(19, 188, 217, 0.15);
}

.form-textarea {
	resize: vertical;
	min-height: 80px;
}

.form-select {
	cursor: pointer;
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2313BCD9' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 12px center;
	padding-right: 32px;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                            */
/* ------------------------------------------------------------------ */

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--spacing-xs);
	padding: 10px var(--spacing-lg);
	border-radius: var(--radius);
	font-size: 0.9rem;
	font-weight: 600;
	cursor: pointer;
	transition: all var(--transition);
	min-height: 42px;
	position: relative;
	overflow: hidden;
}

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

.btn-primary {
	background: var(--gradient-accent);
	color: #fff;
	box-shadow: var(--shadow-glow-cyan);
}

.btn-primary:hover {
	box-shadow: 0 0 30px rgba(19, 188, 217, 0.35);
	transform: translateY(-1px);
}

.btn-danger {
	background: var(--gradient-warm);
	color: #fff;
}

.btn-danger:hover {
	box-shadow: 0 0 20px rgba(224, 85, 85, 0.3);
	transform: translateY(-1px);
}

.btn-ghost {
	color: var(--text-muted);
	border: 1px solid var(--border);
}

.btn-ghost:hover {
	background: var(--bg-hover);
	color: var(--text);
	border-color: var(--accent-cyan);
}

.btn-block {
	width: 100%;
}

.btn-row {
	display: flex;
	gap: var(--spacing-sm);
	margin-top: var(--spacing-md);
}

/* ------------------------------------------------------------------ */
/* Toast notifications                                                */
/* ------------------------------------------------------------------ */

#toast-container {
	position: fixed;
	bottom: calc(var(--tab-height) + var(--spacing-md));
	left: 50%;
	transform: translateX(-50%);
	z-index: 300;
	display: flex;
	flex-direction: column-reverse;
	gap: var(--toast-gap);
	pointer-events: none;
	width: calc(100% - var(--spacing-lg) * 2);
	max-width: 400px;
}

.toast {
	padding: 10px var(--spacing-lg);
	border-radius: var(--radius-lg);
	font-size: 0.9rem;
	font-weight: 600;
	pointer-events: auto;
	animation: toast-in 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), toast-out 0.3s ease 2.7s forwards;
	text-align: center;
	backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.1);
}

.toast.success {
	background: linear-gradient(135deg, rgba(76, 175, 80, 0.9), rgba(56, 142, 60, 0.9));
	color: #fff;
	box-shadow: 0 4px 20px rgba(76, 175, 80, 0.3);
}

.toast.error {
	background: linear-gradient(135deg, rgba(224, 85, 85, 0.9), rgba(163, 51, 51, 0.9));
	color: #fff;
	box-shadow: 0 4px 20px rgba(224, 85, 85, 0.3);
}

.toast.info {
	background: linear-gradient(135deg, rgba(19, 188, 217, 0.9), rgba(105, 89, 166, 0.9));
	color: #fff;
	box-shadow: 0 4px 20px rgba(19, 188, 217, 0.3);
}

@keyframes toast-in {
	from {
		transform: translateY(30px) scale(0.9);
		opacity: 0;
	}
	to {
		transform: translateY(0) scale(1);
		opacity: 1;
	}
}

@keyframes toast-out {
	from {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
	to {
		opacity: 0;
		transform: translateY(-10px) scale(0.95);
	}
}

/* ------------------------------------------------------------------ */
/* Empty state                                                        */
/* ------------------------------------------------------------------ */

.empty-state {
	text-align: center;
	padding: var(--spacing-xl) var(--spacing-md);
	color: var(--text-muted);
}

.empty-state svg {
	width: 80px;
	height: 80px;
	margin-bottom: var(--spacing-md);
	opacity: 0.3;
	color: var(--accent-cyan);
}

.empty-state p {
	font-size: 1.05rem;
	margin-bottom: var(--spacing-sm);
	font-weight: 600;
}

.empty-state .hint {
	font-size: 0.85rem;
	font-weight: 400;
	color: var(--accent-cyan);
	opacity: 0.6;
}

/* ------------------------------------------------------------------ */
/* Sort dropdown                                                      */
/* ------------------------------------------------------------------ */

.sort-menu {
	position: absolute;
	top: var(--header-height);
	right: var(--spacing-md);
	z-index: 110;
	background: var(--bg-surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-lg);
	min-width: 200px;
	overflow: hidden;
	animation: dropdownIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
	backdrop-filter: blur(20px);
}

@keyframes dropdownIn {
	from {
		opacity: 0;
		transform: translateY(-8px) scale(0.96);
	}
	to {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
}

.sort-menu.hidden {
	display: none;
}

.sort-option {
	display: flex;
	align-items: center;
	gap: var(--spacing-sm);
	width: 100%;
	text-align: left;
	padding: 10px var(--spacing-md);
	font-size: 0.9rem;
	cursor: pointer;
	transition: all var(--transition);
}

.sort-option:hover {
	background: var(--bg-hover);
}

.sort-option.active {
	color: var(--accent-cyan);
	font-weight: 700;
	background: rgba(19, 188, 217, 0.08);
}

/* ------------------------------------------------------------------ */
/* Detail view fields                                                 */
/* ------------------------------------------------------------------ */

.detail-field {
	margin-bottom: var(--spacing-md);
}

.detail-label {
	font-size: 0.7rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--accent-lime);
	margin-bottom: 6px;
}

.detail-value {
	font-size: 0.95rem;
	color: var(--text);
	padding: var(--spacing-sm) 0;
	cursor: pointer;
	border-bottom: 1px solid transparent;
	transition: all var(--transition);
}

.detail-value:hover {
	border-bottom-color: var(--accent-cyan);
	color: var(--text-heading);
}

.detail-value.empty {
	color: var(--text-muted);
	font-style: italic;
}

/* ------------------------------------------------------------------ */
/* Reminders list                                                     */
/* ------------------------------------------------------------------ */

.reminder-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--spacing-sm) 0;
	border-bottom: 1px solid rgba(45, 55, 72, 0.4);
	font-size: 0.9rem;
}

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

.reminder-delete {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 32px;
	height: 32px;
	color: var(--text-muted);
	cursor: pointer;
	border-radius: 50%;
	transition: all var(--transition);
}

.reminder-delete svg {
	width: 16px;
	height: 16px;
}

.reminder-delete:hover {
	background: rgba(224, 85, 85, 0.15);
	color: var(--danger);
	transform: scale(1.1);
}

/* ------------------------------------------------------------------ */
/* Category manager                                                   */
/* ------------------------------------------------------------------ */

.cat-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--spacing-sm) var(--spacing-md);
	border-radius: var(--radius);
	margin-bottom: var(--spacing-xs);
	background: var(--gradient-card);
	border: 1px solid rgba(45, 55, 72, 0.3);
	transition: all var(--transition);
}

.cat-item:hover {
	border-color: rgba(19, 188, 217, 0.2);
}

.cat-item-name {
	flex: 1;
	font-size: 0.95rem;
	font-weight: 500;
	cursor: pointer;
	transition: color var(--transition);
}

.cat-item-name:hover {
	color: var(--accent-cyan);
}

.cat-item-count {
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--text-muted);
	margin: 0 var(--spacing-sm);
	background: rgba(15, 15, 26, 0.4);
	padding: 2px 8px;
	border-radius: 20px;
}

.cat-item-actions {
	display: flex;
	gap: 2px;
}

.cat-item-actions button {
	width: 32px;
	height: 32px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	color: var(--text-muted);
	transition: all var(--transition);
}

.cat-item-actions button svg {
	width: 16px;
	height: 16px;
}

.cat-item-actions button:hover {
	background: var(--bg-hover);
	color: var(--accent-cyan);
	transform: scale(1.1);
}

.cat-item-actions button.cat-delete:hover {
	background: rgba(224, 85, 85, 0.15);
	color: var(--danger);
}

/* ------------------------------------------------------------------ */
/* Confirm dialog                                                     */
/* ------------------------------------------------------------------ */

.confirm-body {
	text-align: center;
	padding: var(--spacing-lg) 0;
	font-size: 0.95rem;
	color: var(--text);
}

/* ------------------------------------------------------------------ */
/* Scrollbar                                                          */
/* ------------------------------------------------------------------ */

::-webkit-scrollbar {
	width: 6px;
}

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

::-webkit-scrollbar-thumb {
	background: var(--accent-purple);
	border-radius: 3px;
	opacity: 0.5;
}

::-webkit-scrollbar-thumb:hover {
	background: var(--accent-cyan);
}

/* ------------------------------------------------------------------ */
/* Stagger animation for todo cards                                   */
/* ------------------------------------------------------------------ */

.category-items .todo-card {
	animation: cardSlideIn 0.3s ease both;
}

.category-items .todo-card:nth-child(1) { animation-delay: 0s; }
.category-items .todo-card:nth-child(2) { animation-delay: 0.03s; }
.category-items .todo-card:nth-child(3) { animation-delay: 0.06s; }
.category-items .todo-card:nth-child(4) { animation-delay: 0.09s; }
.category-items .todo-card:nth-child(5) { animation-delay: 0.12s; }
.category-items .todo-card:nth-child(6) { animation-delay: 0.15s; }
.category-items .todo-card:nth-child(7) { animation-delay: 0.18s; }
.category-items .todo-card:nth-child(8) { animation-delay: 0.21s; }
.category-items .todo-card:nth-child(9) { animation-delay: 0.24s; }
.category-items .todo-card:nth-child(10) { animation-delay: 0.27s; }

@keyframes cardSlideIn {
	from {
		opacity: 0;
		transform: translateX(-12px);
	}
	to {
		opacity: 1;
		transform: translateX(0);
	}
}

/* ------------------------------------------------------------------ */
/* Selection and focus styles                                         */
/* ------------------------------------------------------------------ */

::selection {
	background: rgba(19, 188, 217, 0.3);
	color: var(--text-heading);
}

:focus-visible {
	outline: 2px solid var(--accent-cyan);
	outline-offset: 2px;
}