/* ========================
   AI Journey Tracker — Design System & Components
   Spec: docs/ui-spec.md
   ======================== */

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

/* ========================
   Design Tokens
   ======================== */
:root {
	/* Background */
	--bg-primary: #0a0a0f;
	--bg-secondary: #12121a;
	--bg-card: #1a1a25;
	--bg-card-hover: #22222f;
	--bg-input: #15151f;

	/* Text */
	--text-primary: #e4e4e7;
	--text-secondary: #a1a1aa;
	--text-muted: #71717a;

	/* Borders */
	--border-subtle: rgba(255, 255, 255, 0.06);
	--border-default: rgba(255, 255, 255, 0.1);
	--border-active: rgba(255, 255, 255, 0.2);

	/* Phase Colors */
	--color-phase-1: #6366f1;
	--color-phase-2: #10b981;
	--color-phase-3: #f59e0b;
	--color-phase-4: #f43f5e;
	--color-phase-5: #06b6d4;
	--color-phase-6: #a855f7;
	--color-phase-7: #eab308;

	/* Status Colors */
	--status-not-started: #71717a;
	--status-in-progress: #f59e0b;
	--status-completed: #10b981;

	/* Spacing */
	--space-xs: 0.25rem;
	--space-sm: 0.5rem;
	--space-md: 1rem;
	--space-lg: 1.5rem;
	--space-xl: 2rem;
	--space-2xl: 3rem;

	/* Border Radius */
	--radius-sm: 0.375rem;
	--radius-md: 0.75rem;
	--radius-lg: 1rem;
	--radius-full: 9999px;

	/* Transitions */
	--transition-fast: 0.15s ease;
	--transition-default: 0.25s ease;
	--transition-slow: 0.35s ease;

	/* Typography */
	--font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	--font-size-xs: 0.6875rem;
	--font-size-sm: 0.8125rem;
	--font-size-base: 0.875rem;
	--font-size-lg: 1rem;
	--font-size-xl: 1.125rem;
	--font-size-2xl: 1.375rem;
	--font-size-3xl: 1.75rem;

	/* Glassmorphism */
	--glass-bg: rgba(255, 255, 255, 0.03);
	--glass-border: rgba(255, 255, 255, 0.08);
	--glass-blur: blur(12px);

	/* Layout */
	--sidebar-width: 280px;
}

/* ========================
   Reset & Base
   ======================== */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font-family: var(--font-family);
	background-color: var(--bg-primary);
	color: var(--text-primary);
	line-height: 1.5;
	letter-spacing: -0.01em;
	min-height: 100vh;
	overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
	width: 6px;
}

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

::-webkit-scrollbar-thumb {
	background: rgba(255, 255, 255, 0.1);
	border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
	background: rgba(255, 255, 255, 0.2);
}

/* Selection */
::selection {
	background: rgba(99, 102, 241, 0.3);
	color: var(--text-primary);
}

/* ========================
   Utility Classes
   ======================== */
.glass-card {
	background: var(--glass-bg);
	border: 1px solid var(--glass-border);
	border-radius: var(--radius-lg);
	backdrop-filter: var(--glass-blur);
	-webkit-backdrop-filter: var(--glass-blur);
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	border: 0;
}

/* ========================
   Dashboard (Course Catalog)
   ======================== */
.dashboard {
	display: flex;
	flex-direction: column;
	min-height: 100vh;
	padding: var(--space-2xl);
	max-width: 960px;
	margin: 0 auto;
	width: 100%;
}

.dashboard__header {
	margin-bottom: var(--space-2xl);
	padding-bottom: var(--space-lg);
	border-bottom: 1px solid var(--border-subtle);
}

.dashboard__wordmark {
	font-size: var(--font-size-2xl);
	font-weight: 700;
	letter-spacing: -0.03em;
	color: var(--text-primary);
	margin-bottom: var(--space-xs);
}

.dashboard__subtitle {
	font-size: var(--font-size-sm);
	color: var(--text-muted);
}

.dashboard__section-label {
	font-size: var(--font-size-xs);
	font-weight: 600;
	color: var(--text-muted);
	text-transform: uppercase;
	letter-spacing: 0.07em;
	margin-bottom: var(--space-md);
}

.dashboard__grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: var(--space-md);
	margin-bottom: var(--space-2xl);
}

.dashboard__footer {
	margin-top: auto;
	padding-top: var(--space-lg);
	border-top: 1px solid var(--border-subtle);
	display: flex;
	gap: var(--space-sm);
}

.dashboard__action-btn {
	padding: var(--space-sm) var(--space-lg);
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-secondary);
	font-family: var(--font-family);
	font-size: var(--font-size-sm);
	cursor: pointer;
	transition: all var(--transition-fast);
}

.dashboard__action-btn:hover {
	background: var(--bg-card-hover);
	color: var(--text-primary);
	border-color: var(--border-active);
}

/* ========================
   Course Card
   ======================== */
.course-card {
	padding: var(--space-lg);
	cursor: pointer;
	transition: all var(--transition-default);
	position: relative;
	overflow: hidden;
}

.course-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 2px;
	background: var(--course-color, var(--color-phase-1));
	opacity: 0.6;
	transition: opacity var(--transition-fast);
}

.course-card:hover {
	background: var(--bg-card-hover);
	border-color: var(--border-active);
	transform: translateY(-3px);
}

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

.course-card__top {
	display: flex;
	align-items: flex-start;
	gap: var(--space-md);
	margin-bottom: var(--space-md);
}

.course-card__icon {
	width: 40px;
	height: 40px;
	min-width: 40px;
	border-radius: var(--radius-md);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: var(--font-size-xs);
	font-weight: 700;
	letter-spacing: 0.02em;
	color: #fff;
	background: var(--course-color, var(--color-phase-1));
}

.course-card__info {
	flex: 1;
	min-width: 0;
}

.course-card__title {
	font-size: var(--font-size-base);
	font-weight: 600;
	color: var(--text-primary);
	letter-spacing: -0.01em;
	margin-bottom: 2px;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.course-card__desc {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	line-height: 1.5;
}

.course-card__progress-bar {
	width: 100%;
	height: 4px;
	background: var(--border-subtle);
	border-radius: var(--radius-full);
	overflow: hidden;
	margin-bottom: var(--space-xs);
}

.course-card__progress-fill {
	height: 100%;
	border-radius: var(--radius-full);
	background: var(--course-color, var(--color-phase-1));
	transition: width 0.4s ease;
}

.course-card__meta {
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.course-card__count {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
}

.course-card__percent {
	font-size: var(--font-size-xs);
	font-weight: 600;
	color: var(--text-secondary);
}

/* ========================
   App Layout (Course Detail)
   ======================== */
.app {
	display: flex;
	height: 100vh;
	width: 100%;
}

/* Back button */
.app__back {
	position: fixed;
	top: var(--space-md);
	left: calc(var(--sidebar-width) + var(--space-md));
	z-index: 15;
	padding: var(--space-xs) var(--space-md);
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-secondary);
	font-family: var(--font-family);
	font-size: var(--font-size-xs);
	cursor: pointer;
	transition: all var(--transition-fast);
	display: flex;
	align-items: center;
	gap: var(--space-xs);
}

.app__back:hover {
	background: var(--bg-card-hover);
	color: var(--text-primary);
	border-color: var(--border-active);
}

/* ========================
   Burnout: Global Rules
   ======================== */
.burn-rules {
	padding: var(--space-md) var(--space-lg);
	border-bottom: 1px solid var(--border-subtle);
}

.burn-rules__title {
	font-size: var(--font-size-xs);
	font-weight: 600;
	color: var(--text-muted);
	text-transform: uppercase;
	letter-spacing: 0.07em;
	margin-bottom: var(--space-sm);
}

.burn-rules__item {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
	padding: 3px 0;
	cursor: pointer;
}

.burn-rules__checkbox {
	width: 14px;
	height: 14px;
	min-width: 14px;
	border: 1.5px solid var(--border-active);
	border-radius: 3px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 9px;
	color: transparent;
	transition: all var(--transition-fast);
}

.burn-rules__checkbox--checked {
	background: var(--status-completed);
	border-color: var(--status-completed);
	color: #fff;
}

.burn-rules__label {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	line-height: 1.4;
}

.burn-rules__item--checked .burn-rules__label {
	text-decoration: line-through;
	color: var(--text-muted);
	opacity: 0.5;
}

/* ========================
   Burnout: Inline Daily Notes
   ======================== */
.burn-notes {
	margin-top: var(--space-lg);
}

.burn-notes__title {
	font-size: var(--font-size-xs);
	font-weight: 600;
	color: var(--text-muted);
	text-transform: uppercase;
	letter-spacing: 0.07em;
	margin-bottom: var(--space-md);
	padding: var(--space-md) var(--space-lg) 0;
}

.burn-notes__grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
	gap: var(--space-sm);
	padding: 0 var(--space-lg) var(--space-lg);
}

.burn-notes__field {
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.burn-notes__label {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
}

.burn-notes__input {
	padding: var(--space-xs) var(--space-sm);
	background: var(--bg-input);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-sm);
	color: var(--text-primary);
	font-family: var(--font-family);
	font-size: var(--font-size-xs);
	transition: border-color var(--transition-fast);
}

.burn-notes__input:focus {
	outline: none;
	border-color: var(--color-phase-1);
}

.burn-notes__input::placeholder {
	color: var(--text-muted);
	opacity: 0.5;
}

.burn-notes__free {
	padding: 0 var(--space-lg) var(--space-lg);
}

.burn-notes__textarea {
	width: 100%;
	min-height: 80px;
	padding: var(--space-sm) var(--space-md);
	background: var(--bg-input);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	font-family: var(--font-family);
	font-size: var(--font-size-xs);
	line-height: 1.6;
	resize: vertical;
	transition: border-color var(--transition-fast);
}

.burn-notes__textarea:focus {
	outline: none;
	border-color: var(--color-phase-1);
}

.burn-notes__textarea::placeholder {
	color: var(--text-muted);
	opacity: 0.5;
}

.burn-notes__save {
	display: block;
	width: 100%;
	padding: var(--space-sm);
	margin-top: var(--space-sm);
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-secondary);
	font-family: var(--font-family);
	font-size: var(--font-size-xs);
	font-weight: 500;
	cursor: pointer;
	transition: all var(--transition-fast);
}

.burn-notes__save:hover {
	background: var(--bg-card-hover);
	color: var(--text-primary);
}

/* ========================
   Sidebar
   ======================== */
.sidebar {
	width: var(--sidebar-width);
	min-width: var(--sidebar-width);
	height: 100vh;
	background: var(--bg-secondary);
	border-right: 1px solid var(--border-subtle);
	display: flex;
	flex-direction: column;
	overflow-y: auto;
	position: relative;
	z-index: 10;
}

.sidebar__logo {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
	padding: var(--space-md) var(--space-lg);
	font-size: var(--font-size-base);
	font-weight: 600;
	letter-spacing: -0.02em;
	color: var(--text-primary);
	border-bottom: 1px solid var(--border-subtle);
}

.sidebar__logo-icon {
	font-size: 1.5rem;
}

.sidebar__progress {
	padding: var(--space-lg);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--space-sm);
	border-bottom: 1px solid var(--border-subtle);
}

.sidebar__progress-ring {
	position: relative;
	width: 100px;
	height: 100px;
}

.sidebar__progress-ring svg {
	transform: rotate(-90deg);
	width: 100px;
	height: 100px;
}

.sidebar__progress-ring circle {
	fill: none;
	stroke-width: 6;
	stroke-linecap: round;
}

.sidebar__progress-ring .ring-bg {
	stroke: var(--border-subtle);
}

.sidebar__progress-ring .ring-fill {
	stroke: var(--color-phase-1);
	transition: stroke-dashoffset 0.6s ease;
}

.sidebar__progress-text {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	text-align: center;
}

.sidebar__progress-percent {
	font-size: var(--font-size-xl);
	font-weight: 700;
	color: var(--text-primary);
	line-height: 1;
}

.sidebar__progress-label {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	margin-top: 2px;
}

.sidebar__progress-count {
	font-size: var(--font-size-sm);
	color: var(--text-secondary);
}

.sidebar__nav {
	flex: 1;
	padding: var(--space-md) 0;
}

.sidebar__tree {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.sidebar__tree-section {
	padding: 0 var(--space-sm);
}

.sidebar__tree-parent,
.sidebar__tree-child {
	width: 100%;
	border: 0;
	background: transparent;
	font: inherit;
	text-align: left;
	cursor: pointer;
}

.sidebar__tree-parent {
	display: grid;
	grid-template-columns: auto 1fr auto;
	align-items: center;
	gap: var(--space-sm);
	padding: var(--space-sm) var(--space-md);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	transition:
		background var(--transition-fast),
		box-shadow var(--transition-fast);
}

.sidebar__tree-parent:hover {
	background: var(--bg-card);
}

.sidebar__tree-parent--active {
	background: var(--bg-card);
	box-shadow: inset 3px 0 0 var(--sidebar-tree-color, var(--color-phase-1));
}

.sidebar__tree-parent-dot {
	width: 0.625rem;
	height: 0.625rem;
	border-radius: var(--radius-full);
	background: var(--sidebar-tree-color, var(--color-phase-1));
	flex-shrink: 0;
}

.sidebar__tree-children {
	display: none;
	margin: var(--space-xs) 0 0 calc(var(--space-md) + 0.3125rem);
	padding-left: var(--space-md);
	border-left: 1px solid var(--border-subtle);
}

.sidebar__tree-children--open {
	display: block;
}

.sidebar__tree-child {
	display: grid;
	grid-template-columns: auto 1fr auto;
	align-items: center;
	gap: var(--space-sm);
	padding: 0.45rem var(--space-sm);
	border-radius: var(--radius-sm);
	color: var(--text-secondary);
	transition:
		background var(--transition-fast),
		color var(--transition-fast);
}

.sidebar__tree-child:hover {
	background: var(--bg-card);
	color: var(--text-primary);
}

.sidebar__tree-child--active {
	background: rgba(255, 255, 255, 0.06);
	color: var(--text-primary);
}

.sidebar__tree-child-bullet {
	width: 0.35rem;
	height: 0.35rem;
	border-radius: var(--radius-full);
	background: currentColor;
	opacity: 0.65;
}

.sidebar__tree-label {
	min-width: 0;
	font-size: var(--font-size-sm);
	font-weight: 500;
	line-height: 1.35;
}

.sidebar__tree-count {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	background: var(--bg-primary);
	padding: 2px 6px;
	border-radius: var(--radius-sm);
	white-space: nowrap;
}

.sidebar__actions {
	padding: var(--space-md) var(--space-lg);
	border-top: 1px solid var(--border-subtle);
	display: flex;
	gap: var(--space-sm);
}

.sidebar__action-btn {
	flex: 1;
	padding: var(--space-sm) var(--space-md);
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-secondary);
	font-family: var(--font-family);
	font-size: var(--font-size-sm);
	cursor: pointer;
	transition: all var(--transition-fast);
	display: flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-xs);
}

.sidebar__action-btn:hover {
	background: var(--bg-card-hover);
	color: var(--text-primary);
	border-color: var(--border-active);
}

/* Mobile hamburger */
.sidebar__hamburger {
	display: none;
	position: fixed;
	top: var(--space-md);
	left: var(--space-md);
	z-index: 20;
	width: 40px;
	height: 40px;
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	cursor: pointer;
	align-items: center;
	justify-content: center;
	color: var(--text-primary);
	font-size: var(--font-size-xl);
}

/* ========================
   Main Content
   ======================== */
.main {
	flex: 1;
	overflow-y: auto;
	padding: var(--space-xl) var(--space-2xl);
}

/* ========================
   Phase Header
   ======================== */
.phase-header {
	padding: var(--space-xl);
	margin-bottom: var(--space-xl);
	position: relative;
	overflow: hidden;
	background:
		linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)), var(--glass-bg);
	border-color: var(--border-default);
	box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.phase-header::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--phase-color), transparent);
}

.phase-header::after {
	content: '';
	position: absolute;
	right: -4rem;
	top: -4rem;
	width: 12rem;
	height: 12rem;
	border-radius: 9999px;
	background: var(--phase-color);
	opacity: 0.12;
	filter: blur(56px);
	pointer-events: none;
}

.phase-header__title {
	position: relative;
	font-size: var(--font-size-3xl);
	font-weight: 700;
	line-height: 1.2;
	letter-spacing: -0.03em;
	color: #fff;
	margin-bottom: var(--space-sm);
	max-width: 42rem;
	text-wrap: balance;
}

.phase-header__subtitle {
	position: relative;
	font-size: var(--font-size-base);
	line-height: 1.65;
	color: var(--text-secondary);
	margin-bottom: var(--space-lg);
	max-width: 42rem;
}

.phase-header__progress {
	position: relative;
	margin-bottom: var(--space-lg);
}

.phase-header__progress-bar {
	width: 100%;
	height: 8px;
	background: var(--border-subtle);
	border-radius: var(--radius-full);
	overflow: hidden;
	margin-bottom: var(--space-xs);
}

.phase-header__progress-fill {
	height: 100%;
	background: var(--phase-color, var(--color-phase-1));
	border-radius: var(--radius-full);
	transition: width 0.4s ease;
	min-width: 0;
}

.phase-header__progress-text {
	position: relative;
	font-size: var(--font-size-xs);
	font-weight: 500;
	color: var(--text-secondary);
}

.phase-header__goals {
	position: relative;
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm);
}

.phase-header__goal-tag {
	padding: var(--space-xs) var(--space-md);
	background: rgba(255, 255, 255, 0.05);
	border: 1px solid color-mix(in srgb, var(--phase-color) 34%, var(--border-default));
	border-radius: var(--radius-full);
	font-size: var(--font-size-xs);
	color: var(--text-secondary);
	transition:
		background var(--transition-fast),
		border-color var(--transition-fast),
		color var(--transition-fast);
}

.phase-header__goal-tag:hover {
	background: rgba(255, 255, 255, 0.08);
	border-color: color-mix(in srgb, var(--phase-color) 55%, var(--border-active));
	color: var(--text-primary);
}

/* ========================
   Month Section
   ======================== */
.month-section {
	margin-bottom: var(--space-md);
}

.month-section__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--space-md) var(--space-lg);
	cursor: pointer;
	transition: background var(--transition-fast);
	user-select: none;
}

.month-section__header:hover {
	background: var(--bg-card-hover);
}

.month-section__header-left {
	display: flex;
	align-items: center;
	gap: var(--space-md);
}

.month-section__title {
	font-size: var(--font-size-base);
	font-weight: 600;
	color: var(--text-primary);
}

.month-section__count {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
}

.month-section__chevron {
	color: var(--text-muted);
	transition: transform var(--transition-default);
	font-size: var(--font-size-sm);
}

.month-section__header--expanded .month-section__chevron {
	transform: rotate(90deg);
}

.month-section__content {
	max-height: 0;
	overflow: hidden;
	transition:
		max-height var(--transition-slow),
		opacity var(--transition-default);
	opacity: 0;
}

.month-section__content--open {
	max-height: 2000px;
	opacity: 1;
}

/* ========================
   Checklist Items
   ======================== */
.month-section__items {
	padding: 0 var(--space-lg) var(--space-md);
}

.month-section__item {
	display: flex;
	align-items: center;
	gap: var(--space-md);
	padding: var(--space-sm) var(--space-sm);
	border-radius: var(--radius-md);
	transition: background var(--transition-fast);
	cursor: pointer;
}

.month-section__item:hover {
	background: var(--bg-card-hover);
}

.month-section__checkbox {
	width: 20px;
	height: 20px;
	min-width: 20px;
	border: 2px solid var(--border-active);
	border-radius: var(--radius-sm);
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: all var(--transition-fast);
	color: transparent;
	font-size: var(--font-size-xs);
}

.month-section__checkbox:hover {
	border-color: var(--status-completed);
}

.month-section__checkbox--checked {
	background: var(--status-completed);
	border-color: var(--status-completed);
	color: #fff;
	animation: checkBounce 0.3s ease;
}

.month-section__checkbox--in-progress {
	border-color: var(--status-in-progress);
	background: rgba(245, 158, 11, 0.15);
}

.month-section__item-title {
	flex: 1;
	font-size: var(--font-size-sm);
	color: var(--text-primary);
	transition: all var(--transition-fast);
}

.month-section__item--completed .month-section__item-title {
	color: var(--text-muted);
	text-decoration: line-through;
}

.month-section__item-actions {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
}

.month-section__guide-badge {
	font-size: 0.65rem;
	font-weight: 600;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--color-phase-1);
	background: rgba(99, 102, 241, 0.12);
	border: 1px solid rgba(99, 102, 241, 0.22);
	border-radius: var(--radius-full);
	padding: 0.15rem 0.45rem;
	cursor: pointer;
}

.month-section__note-indicator {
	font-size: var(--font-size-sm);
	color: var(--text-muted);
	opacity: 0.4;
	transition: opacity var(--transition-fast);
	cursor: pointer;
	padding: var(--space-xs);
}

.month-section__note-indicator--has-note {
	opacity: 1;
	color: var(--color-phase-1);
}

.month-section__item:hover .month-section__note-indicator {
	opacity: 1;
}

.month-section__status-dot {
	width: 8px;
	height: 8px;
	border-radius: var(--radius-full);
	flex-shrink: 0;
}

/* ========================
   Project Grid
   ======================== */
.project-section {
	margin-top: var(--space-xl);
}

.project-section__title {
	font-size: var(--font-size-base);
	font-weight: 600;
	color: var(--text-secondary);
	margin-bottom: var(--space-md);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.project-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
	gap: var(--space-md);
}

.project-card {
	padding: var(--space-lg);
	transition: all var(--transition-default);
	cursor: pointer;
}

.project-card:hover {
	background: var(--bg-card-hover);
	border-color: var(--border-active);
	transform: translateY(-2px);
}

.project-card__title {
	font-size: var(--font-size-sm);
	font-weight: 600;
	color: var(--text-primary);
	margin-bottom: var(--space-xs);
}

.project-card__label {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	margin-bottom: var(--space-sm);
}

.project-card__guide {
	display: inline-flex;
	align-items: center;
	padding: 0.2rem 0.5rem;
	margin-bottom: var(--space-sm);
	border-radius: var(--radius-full);
	font-size: 0.7rem;
	font-weight: 600;
	color: var(--color-phase-1);
	background: rgba(99, 102, 241, 0.12);
	border: 1px solid rgba(99, 102, 241, 0.22);
}

.project-card__status {
	display: inline-flex;
	align-items: center;
	gap: var(--space-xs);
	padding: var(--space-xs) var(--space-sm);
	border-radius: var(--radius-full);
	font-size: var(--font-size-xs);
	font-weight: 500;
}

.project-card__status--not-started {
	background: rgba(113, 113, 122, 0.15);
	color: var(--status-not-started);
}

.project-card__status--in-progress {
	background: rgba(245, 158, 11, 0.15);
	color: var(--status-in-progress);
}

.project-card__status--completed {
	background: rgba(16, 185, 129, 0.15);
	color: var(--status-completed);
}

.project-card__github {
	margin-top: var(--space-sm);
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	display: flex;
	align-items: center;
	gap: var(--space-xs);
}

.project-card__github a {
	color: var(--color-phase-1);
	text-decoration: none;
}

.project-card__github a:hover {
	text-decoration: underline;
}

/* ========================
   Notes Panel
   ======================== */
.notes-panel {
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	z-index: 100;
	pointer-events: none;
}

.notes-panel--open {
	pointer-events: auto;
}

.notes-panel__overlay {
	position: absolute;
	inset: 0;
	background: rgba(0, 0, 0, 0.5);
	opacity: 0;
	transition: opacity var(--transition-default);
	backdrop-filter: blur(4px);
	-webkit-backdrop-filter: blur(4px);
}

.notes-panel--open .notes-panel__overlay {
	opacity: 1;
}

.notes-panel__content {
	position: absolute;
	inset: 0;
	display: flex;
	justify-content: flex-end;
	align-items: stretch;
	pointer-events: none;
}

.notes-panel__shell {
	position: relative;
	background: var(--bg-secondary);
	display: flex;
	flex-direction: column;
	overflow-y: auto;
	pointer-events: auto;
}

.notes-panel__shell--drawer {
	width: 420px;
	max-width: 100%;
	height: 100%;
	border-left: 1px solid var(--border-default);
	transform: translateX(100%);
	transition: transform 0.3s ease;
}

.notes-panel--open .notes-panel__shell--drawer {
	transform: translateX(0);
}

.notes-panel--modal .notes-panel__content {
	justify-content: center;
	align-items: center;
	padding: var(--space-xl);
}

.notes-panel__shell--modal {
	width: min(720px, 100%);
	max-height: min(85vh, 100%);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-lg);
	box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
	opacity: 0;
	transform: translateY(16px) scale(0.98);
	transition:
		opacity var(--transition-default),
		transform var(--transition-default);
}

.notes-panel--open .notes-panel__shell--modal {
	opacity: 1;
	transform: translateY(0) scale(1);
}

.notes-panel__header {
	padding: var(--space-lg);
	border-bottom: 1px solid var(--border-subtle);
}

.notes-panel__close {
	position: absolute;
	top: var(--space-md);
	right: var(--space-md);
	width: 32px;
	height: 32px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: none;
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-muted);
	cursor: pointer;
	transition: all var(--transition-fast);
	font-size: var(--font-size-lg);
}

.notes-panel__close:hover {
	background: var(--bg-card);
	color: var(--text-primary);
}

.notes-panel__title {
	font-size: var(--font-size-lg);
	font-weight: 700;
	letter-spacing: -0.02em;
	color: var(--text-primary);
	padding-right: var(--space-2xl);
}

.notes-panel__breadcrumb {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	margin-top: var(--space-xs);
}

.notes-panel__body {
	padding: var(--space-lg);
	flex: 1;
	display: flex;
	flex-direction: column;
	gap: var(--space-lg);
}

.notes-panel__field {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.notes-panel__label {
	font-size: var(--font-size-sm);
	font-weight: 500;
	color: var(--text-secondary);
}

.notes-panel__status-group {
	display: flex;
	gap: 2px;
	background: var(--bg-primary);
	border-radius: var(--radius-md);
	padding: 3px;
}

.notes-panel__status-btn {
	flex: 1;
	padding: var(--space-sm) var(--space-md);
	border: none;
	border-radius: var(--radius-sm);
	background: transparent;
	color: var(--text-muted);
	font-family: var(--font-family);
	font-size: var(--font-size-xs);
	font-weight: 500;
	cursor: pointer;
	transition: all var(--transition-fast);
	white-space: nowrap;
}

.notes-panel__status-btn:hover {
	color: var(--text-primary);
}

.notes-panel__status-btn--active {
	color: #fff;
}

.notes-panel__status-btn--active[data-status='not_started'] {
	background: var(--status-not-started);
}

.notes-panel__status-btn--active[data-status='in_progress'] {
	background: var(--status-in-progress);
}

.notes-panel__status-btn--active[data-status='completed'] {
	background: var(--status-completed);
}

.notes-panel__dates {
	font-size: var(--font-size-xs);
	color: var(--text-muted);
	display: flex;
	flex-direction: column;
	gap: var(--space-xs);
}

.notes-panel__guide {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
	padding: var(--space-md);
	background: var(--bg-card);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-lg);
}

.notes-panel__guide-summary {
	font-size: var(--font-size-sm);
	line-height: 1.6;
	color: var(--text-secondary);
}

.notes-panel__guide-section {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.notes-panel__guide-list {
	margin: 0;
	padding-left: 1.1rem;
	color: var(--text-primary);
	display: grid;
	gap: var(--space-xs);
	font-size: var(--font-size-sm);
	line-height: 1.6;
}

.notes-panel__textarea {
	width: 100%;
	min-height: 200px;
	padding: var(--space-md);
	background: var(--bg-input);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	font-family: var(--font-family);
	font-size: var(--font-size-sm);
	line-height: 1.6;
	resize: vertical;
	transition: border-color var(--transition-fast);
}

.notes-panel__textarea:focus {
	outline: none;
	border-color: var(--color-phase-1);
}

.notes-panel__textarea::placeholder {
	color: var(--text-muted);
}

.notes-panel__github-input {
	width: 100%;
	padding: var(--space-sm) var(--space-md);
	background: var(--bg-input);
	border: 1px solid var(--border-default);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	font-family: var(--font-family);
	font-size: var(--font-size-sm);
	transition: border-color var(--transition-fast);
}

.notes-panel__github-input:focus {
	outline: none;
	border-color: var(--color-phase-1);
}

.notes-panel__github-input::placeholder {
	color: var(--text-muted);
}

.notes-panel__footer {
	padding: var(--space-lg);
	border-top: 1px solid var(--border-subtle);
}

.notes-panel__save-btn {
	width: 100%;
	padding: var(--space-sm) var(--space-lg);
	background: var(--color-phase-1);
	border: none;
	border-radius: var(--radius-md);
	color: #fff;
	font-family: var(--font-family);
	font-size: var(--font-size-sm);
	font-weight: 600;
	cursor: pointer;
	transition: all var(--transition-fast);
}

.notes-panel__save-btn:hover {
	filter: brightness(1.15);
	transform: translateY(-1px);
}

.notes-panel__save-btn:active {
	transform: translateY(0);
}

/* ========================
   Toast Notification
   ======================== */
.toast {
	position: fixed;
	bottom: var(--space-xl);
	left: 50%;
	transform: translateX(-50%) translateY(20px);
	padding: var(--space-sm) var(--space-lg);
	border-radius: var(--radius-md);
	font-size: var(--font-size-sm);
	font-weight: 500;
	opacity: 0;
	pointer-events: none;
	transition: all var(--transition-default);
	z-index: 200;
	display: flex;
	align-items: center;
	gap: var(--space-sm);
}

.toast--visible {
	opacity: 1;
	transform: translateX(-50%) translateY(0);
}

.toast--success {
	background: rgba(16, 185, 129, 0.15);
	color: var(--status-completed);
	border: 1px solid rgba(16, 185, 129, 0.3);
}

.toast--error {
	background: rgba(244, 63, 94, 0.15);
	color: var(--color-phase-4);
	border: 1px solid rgba(244, 63, 94, 0.3);
}

.toast--info {
	background: rgba(99, 102, 241, 0.15);
	color: var(--color-phase-1);
	border: 1px solid rgba(99, 102, 241, 0.3);
}

/* ========================
   Animations
   ======================== */
@keyframes checkBounce {
	0% {
		transform: scale(1);
	}
	30% {
		transform: scale(1.3);
	}
	60% {
		transform: scale(0.9);
	}
	100% {
		transform: scale(1);
	}
}

@keyframes fadeIn {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}

/* ========================
   Responsive: Tablet
   ======================== */
@media (max-width: 1023px) {
	.sidebar {
		width: 240px;
		min-width: 240px;
	}

	.sidebar__actions {
		flex-direction: column;
		padding: var(--space-sm);
	}

	.sidebar__action-btn span {
		display: none;
	}

	.sidebar__progress-ring {
		width: 64px;
		height: 64px;
	}

	.sidebar__progress-ring svg {
		width: 64px;
		height: 64px;
	}

	.sidebar__progress-percent {
		font-size: var(--font-size-base);
	}

	.sidebar__progress-label {
		display: none;
	}

	.sidebar__progress-count {
		text-align: center;
	}

	.main {
		padding: var(--space-lg);
	}
}

/* ========================
   Responsive: Mobile
   ======================== */
@media (max-width: 767px) {
	.sidebar {
		position: fixed;
		left: 0;
		top: 0;
		width: var(--sidebar-width);
		transform: translateX(-100%);
		transition: transform var(--transition-slow);
		z-index: 50;
	}

	.sidebar--open {
		transform: translateX(0);
	}

	.sidebar--open ~ .sidebar__backdrop {
		opacity: 1;
		pointer-events: auto;
	}

	.sidebar__hamburger {
		display: flex;
	}

	.sidebar__logo span,
	.sidebar__progress-count {
		display: initial;
	}

	.sidebar__progress-ring {
		width: 100px;
		height: 100px;
	}

	.sidebar__progress-ring svg {
		width: 100px;
		height: 100px;
	}

	.sidebar__progress-percent {
		font-size: var(--font-size-2xl);
	}

	.sidebar__progress-label {
		display: block;
	}

	.sidebar__actions {
		flex-direction: row;
		padding: var(--space-md) var(--space-lg);
	}

	.sidebar__action-btn span {
		display: initial;
	}

	.main {
		padding: var(--space-md);
		padding-top: 60px;
	}

	.notes-panel__content {
		width: 100%;
	}

	.notes-panel--drawer .notes-panel__shell--drawer {
		width: 100%;
	}

	.notes-panel--modal .notes-panel__content {
		padding: var(--space-md);
	}

	.notes-panel__shell--modal {
		width: 100%;
		max-height: calc(100vh - (var(--space-md) * 2));
	}

	.project-grid {
		grid-template-columns: 1fr;
	}

	.phase-header__title {
		font-size: var(--font-size-2xl);
	}
}

.sidebar__backdrop {
	position: fixed;
	inset: 0;
	background: rgba(0, 0, 0, 0.5);
	opacity: 0;
	pointer-events: none;
	transition: opacity var(--transition-default);
	z-index: 40;
}