:root {
	--bg: #0f1419;
	--surface: #1a2332;
	--surface-hover: #243047;
	--border: #2d3a52;
	--text: #e8edf5;
	--muted: #8b9bb4;
	--accent: #5b9fd4;
	--accent-dim: #3d7bb0;
	--today: rgba(91, 159, 212, 0.25);
	--danger: #e06c75;
	font-family: "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	background: radial-gradient(1200px 800px at 20% -10%, #1e3a5f 0%, var(--bg) 55%);
	color: var(--text);
	line-height: 1.45;
}

.app-header {
	padding: 1.5rem 1.75rem 0.5rem;
	max-width: 1100px;
	margin: 0 auto;
}

.app-title {
	margin: 0;
	font-weight: 600;
	font-size: 1.5rem;
	letter-spacing: 0.02em;
}

.app-subtitle {
	margin: 0.35rem 0 0;
	color: var(--muted);
	font-size: 0.875rem;
}

.layout {
	max-width: 1100px;
	margin: 0 auto;
	padding: 1rem 1.25rem 2.5rem;
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.25rem;
}

@media (min-width: 960px) {
	.layout {
		grid-template-columns: 2fr minmax(280px, 1fr);
		align-items: start;
	}
}

.panel {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: 12px;
	padding: 1rem 1.1rem;
	box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.calendar-panel {
	padding-bottom: 1.25rem;
}

.month-toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.month-title {
	margin: 0;
	font-size: 1.2rem;
	font-weight: 600;
}

.calendar-wrap {
	border: 1px solid var(--border);
	border-radius: 10px;
	overflow: hidden;
}

.weekday-row,
.week-row {
	display: grid;
	grid-template-columns: repeat(7, 1fr);
}

.weekday-row {
	background: #131b28;
	border-bottom: 1px solid var(--border);
}

.weekday {
	padding: 0.45rem 0.35rem;
	text-align: center;
	font-size: 0.75rem;
	color: var(--muted);
	font-weight: 600;
	text-transform: none;
}

.calendar-wrap > .week-row:nth-child(even) {
	background: rgba(255, 255, 255, 0.02);
}

.week-row + .week-row {
	border-top: 1px solid var(--border);
}

.day-cell {
	min-height: 92px;
	padding: 0.35rem 0.35rem 0.5rem;
	border-right: 1px solid var(--border);
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
}

.day-cell:last-child {
	border-right: none;
}

.day-cell.muted {
	opacity: 0.45;
}

.day-cell.today {
	box-shadow: inset 0 0 0 1px var(--accent-dim);
	background: var(--today);
}

.day-head {
	display: flex;
	justify-content: flex-start;
}

.day-number {
	color: inherit;
	text-decoration: none;
	font-weight: 600;
	font-size: 0.9rem;
	padding: 0.1rem 0.35rem;
	border-radius: 6px;
}

.day-number:hover {
	background: var(--surface-hover);
}

.event-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 0.25rem;
	flex: 1;
	min-height: 0;
}

.event-item {
	position: relative;
	background: rgba(255, 255, 255, 0.06);
	border-radius: 6px;
	padding: 0.2rem 1.45rem 0.2rem 0.35rem;
	font-size: 0.72rem;
	line-height: 1.3;
	word-break: break-word;
}

.event-title {
	display: block;
	font-weight: 500;
}

.event-meta {
	display: block;
	color: var(--muted);
	font-size: 0.68rem;
	margin-top: 0.05rem;
}

.inline-delete {
	position: absolute;
	top: 1px;
	right: 2px;
	margin: 0;
}

.btn-icon {
	appearance: none;
	border: none;
	background: transparent;
	color: var(--muted);
	cursor: pointer;
	font-size: 1rem;
	line-height: 1;
	padding: 0.1rem 0.25rem;
	border-radius: 4px;
}

.btn-icon:hover {
	color: var(--danger);
	background: rgba(224, 108, 117, 0.12);
}

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.35rem;
	padding: 0.45rem 0.85rem;
	border-radius: 8px;
	font-size: 0.875rem;
	font-weight: 500;
	text-decoration: none;
	cursor: pointer;
	border: 1px solid transparent;
	transition: background 0.15s ease, border-color 0.15s ease;
}

.btn.ghost {
	color: var(--text);
	border-color: var(--border);
	background: transparent;
}

.btn.ghost:hover {
	background: var(--surface-hover);
	border-color: var(--accent-dim);
}

.form-panel h3 {
	margin: 0 0 0.85rem;
	font-size: 1.05rem;
}

.event-form {
	display: flex;
	flex-direction: column;
	gap: 0.85rem;
}

.field {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
}

.field .label {
	font-size: 0.82rem;
	color: var(--muted);
	font-weight: 500;
}

.field input,
.field textarea {
	font: inherit;
	color: var(--text);
	background: #121a26;
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 0.5rem 0.65rem;
}

.field input:focus,
.field textarea:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px rgba(91, 159, 212, 0.25);
}

.error {
	color: #f9a199;
	font-size: 0.78rem;
}

.btn.primary {
	background: linear-gradient(180deg, var(--accent), var(--accent-dim));
	color: #fff;
	border: none;
	width: 100%;
	padding: 0.65rem;
	margin-top: 0.35rem;
}

.btn.primary:hover {
	filter: brightness(1.06);
}