:root {
	--primary: #013a4a;
	--primary-light: #0f5968;
	--primary-lighter: #1a7d9b;
	--accent: #f46d32;
	--accent-light: #f68c54;
	--accent-dark: #d95f2b;
	--success: #28a745;
	--warning: #dc3545;
	--bg: #f0f4f7;
	--bg-light: #fafbfc;
	--text: #1f2937;
	--text-light: #6b7280;
	--border: #e5e7eb;
	--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
	--shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
	--shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.15);
	--transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
	box-sizing: border-box;
}

html, body {
	margin: 0;
	padding: 0;
}

body {
	background: linear-gradient(135deg, #f0f4f7 0%, #fafbfc 100%);
	color: var(--text);
	font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	line-height: 1.6;
	min-height: 100vh;
}

h1, h2, h3, h4, h5, h6,
.navbar-brand {
	font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	font-weight: 700;
	letter-spacing: -0.5px;
}

.app-shell {
	min-height: calc(100vh - 70px);
	padding: 2rem 1rem;
}

/* NAVBAR */
.obs-navbar {
	background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
	color: #fff;
	box-shadow: var(--shadow-md);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid rgba(255, 255, 255, 0.1);
	padding: 0.75rem 0 !important;
}

.navbar-brand {
	font-size: 1.4rem;
	font-weight: 700;
	display: flex;
	align-items: center;
	gap: 0.75rem;
	color: #fff !important;
	transition: var(--transition);
}

.navbar-brand:hover {
	transform: translateY(-2px);
}

.brand-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 32px;
	height: 32px;
	background: var(--accent);
	border-radius: 8px;
	font-weight: 700;
	font-size: 1.2rem;
	color: #fff;
	box-shadow: 0 4px 12px rgba(244, 109, 50, 0.3);
}

/* FORM SECTION */
.add-todo-form {
	background: linear-gradient(135deg, rgba(1, 58, 74, 0.03) 0%, rgba(244, 109, 50, 0.03) 100%);
	border: 1.5px solid var(--border);
	border-radius: 16px;
	padding: 2rem;
	margin-bottom: 2.5rem;
	backdrop-filter: blur(8px);
	box-shadow: var(--shadow-sm);
	transition: var(--transition);
}

.add-todo-form:hover {
	box-shadow: var(--shadow-md);
	border-color: var(--accent);
}

.add-todo-form h2 {
	color: var(--primary);
	font-size: 1.5rem;
	margin-bottom: 1.5rem;
	margin-top: 0;
}

.form-group {
	margin-bottom: 1.3rem;
}

.form-label {
	font-weight: 600;
	color: var(--primary);
	font-size: 0.9rem;
	margin-bottom: 0.6rem;
	display: block;
	text-transform: uppercase;
	letter-spacing: 0.5px;
}

.form-control,
.form-select {
	border: 1.5px solid var(--border);
	border-radius: 10px;
	padding: 0.8rem 1.1rem;
	font-family: 'IBM Plex Sans', sans-serif;
	font-size: 0.95rem;
	color: var(--text);
	background: var(--bg-light);
	transition: var(--transition);
}

.form-control::placeholder {
	color: var(--text-light);
}

.form-control:focus,
.form-select:focus {
	border-color: var(--accent);
	box-shadow: 0 0 0 4px rgba(244, 109, 50, 0.1);
	outline: none;
	background: #fff;
}

.form-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 1.3rem;
}

.btn-add-todo {
	background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
	border: none;
	color: #fff;
	font-weight: 700;
	border-radius: 10px;
	padding: 1rem 2rem;
	width: 100%;
	cursor: pointer;
	font-size: 1rem;
	transition: var(--transition);
	text-transform: uppercase;
	letter-spacing: 0.5px;
	box-shadow: 0 4px 15px rgba(244, 109, 50, 0.3);
}

.btn-add-todo:hover {
	transform: translateY(-3px);
	box-shadow: 0 8px 25px rgba(244, 109, 50, 0.4);
}

.btn-add-todo:active {
	transform: translateY(-1px);
}

/* BOARD */
.board-container {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
	gap: 2rem;
	margin-top: 1rem;
}

.kanban-column {
	background: var(--bg-light);
	border-radius: 16px;
	border: 1px solid var(--border);
	display: flex;
	flex-direction: column;
	overflow: hidden;
	box-shadow: var(--shadow-sm);
	transition: var(--transition);
}

.kanban-column:hover {
	box-shadow: var(--shadow-md);
	border-color: var(--accent);
}

.column-header {
	background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
	padding: 1.3rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
	color: #fff;
}

.column-title {
	font-family: 'Space Grotesk', sans-serif;
	font-size: 1.2rem;
	font-weight: 700;
	margin: 0;
	text-transform: uppercase;
	letter-spacing: 0.5px;
}

.column-count {
	background: var(--accent);
	color: #fff;
	border-radius: 20px;
	padding: 0.35rem 0.8rem;
	font-size: 0.75rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.5px;
	min-width: 32px;
	text-align: center;
	box-shadow: 0 4px 12px rgba(244, 109, 50, 0.3);
}

.column-body {
	padding: 1.2rem;
	flex: 1;
	min-height: 450px;
	overflow-y: auto;
	background: var(--bg-light);
}

.column-body::-webkit-scrollbar {
	width: 6px;
}

.column-body::-webkit-scrollbar-track {
	background: transparent;
}

.column-body::-webkit-scrollbar-thumb {
	background: var(--border);
	border-radius: 3px;
}

.column-body::-webkit-scrollbar-thumb:hover {
	background: var(--text-light);
}

/* TODO ITEM */
.todo-item {
	background: #fff;
	border: 1px solid var(--border);
	border-radius: 12px;
	padding: 1rem;
	margin-bottom: 0.9rem;
	cursor: grab;
	transition: var(--transition);
	box-shadow: var(--shadow-sm);
	border-left: 4px solid transparent;
}

.todo-item:active {
	cursor: grabbing;
}

.todo-item:hover {
	box-shadow: var(--shadow-md);
	border-color: var(--accent);
	transform: translateY(-2px);
}

.todo-item[data-priority="high"] {
	border-left-color: #dc3545;
}

.todo-item[data-priority="medium"] {
	border-left-color: var(--accent);
}

.todo-item[data-priority="low"] {
	border-left-color: #28a745;
}

.todo-item.sortable-ghost {
	opacity: 0.4;
	background: rgba(244, 109, 50, 0.08);
	box-shadow: 0 0 0 2px var(--accent);
	border-color: var(--accent);
}

.todo-header {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	margin-bottom: 0.7rem;
	gap: 0.8rem;
}

.todo-title {
	font-weight: 700;
	color: var(--text);
	font-size: 0.95rem;
	word-break: break-word;
	flex: 1;
	line-height: 1.3;
}

.priority-badge {
	display: inline-flex;
	align-items: center;
	padding: 0.3rem 0.7rem;
	border-radius: 6px;
	font-size: 0.65rem;
	font-weight: 700;
	text-transform: uppercase;
	white-space: nowrap;
	letter-spacing: 0.05em;
	flex-shrink: 0;
}

.priority-high {
	background: rgba(220, 53, 69, 0.15);
	color: #c82333;
	box-shadow: 0 2px 8px rgba(220, 53, 69, 0.2);
}

.priority-medium {
	background: rgba(244, 109, 50, 0.15);
	color: #d95f2b;
	box-shadow: 0 2px 8px rgba(244, 109, 50, 0.2);
}

.priority-low {
	background: rgba(40, 167, 69, 0.15);
	color: #1e7e34;
	box-shadow: 0 2px 8px rgba(40, 167, 69, 0.2);
}

.todo-description {
	color: var(--text-light);
	font-size: 0.85rem;
	margin-bottom: 0.7rem;
	line-height: 1.4;
	padding: 0.6rem;
	background: rgba(1, 58, 74, 0.02);
	border-radius: 6px;
	border-left: 2px solid var(--accent);
}

.todo-footer {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-top: 0.8rem;
	padding-top: 0.8rem;
	border-top: 1px solid var(--border);
}

.todo-date {
	font-size: 0.75rem;
	color: var(--text-light);
	font-weight: 500;
}

.todo-delete {
	background: none;
	border: none;
	color: var(--text-light);
	cursor: pointer;
	font-size: 1rem;
	padding: 0.4rem;
	transition: var(--transition);
	border-radius: 6px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.todo-delete:hover {
	color: #dc3545;
	background: rgba(220, 53, 69, 0.1);
	transform: scale(1.15);
}

/* EMPTY STATE */
.empty-state {
	text-align: center;
	color: var(--text-light);
	padding: 2rem 1rem;
	font-size: 0.9rem;
	font-weight: 500;
}

.empty-state::before {
	content: "📝";
	display: block;
	font-size: 2.5rem;
	margin-bottom: 0.8rem;
	opacity: 0.5;
}

/* RESPONSIVE */
@media (max-width: 768px) {
	.board-container {
		grid-template-columns: 1fr;
		gap: 1.5rem;
	}

	.form-row {
		grid-template-columns: 1fr;
	}

	.app-shell {
		padding: 1rem 0.75rem;
	}

	.add-todo-form {
		padding: 1.5rem;
	}

	.column-body {
		min-height: 350px;
	}
}

@media (max-width: 480px) {
	.add-todo-form {
		padding: 1.2rem;
		margin-bottom: 1.5rem;
	}

	.add-todo-form h2 {
		font-size: 1.2rem;
		margin-bottom: 1rem;
	}

	.column-title {
		font-size: 1rem;
	}

	.todo-title {
		font-size: 0.9rem;
	}

	.priority-badge {
		font-size: 0.6rem;
		padding: 0.25rem 0.5rem;
	}
}