/* ============================================================================
   Gold Investment Dashboard — CSS Stylesheet
   Mobile-first, dark theme, golden accents
   ============================================================================ */

/* CSS Custom Properties (Color Palette) */
:root {
	--bg-primary: #0a0a0a;
	--bg-secondary: #161616;
	--bg-tertiary: #1c1c1c;
	--text-primary: #f0ead6;
	--text-secondary: #b8b8b8;
	--gold-primary: #d4af37;
	--gold-light: #f4e5b2;
	--gold-dark: #b8860b;
	--border-color: #2a2a2a;
	--success-color: #4ade80;
	--warning-color: #fbbf24;
	--error-color: #f87171;
	--spacing-xs: 0.375rem;
	--spacing-sm: 0.625rem;
	--spacing-md: 0.875rem;
	--spacing-lg: 1.25rem;
	--spacing-xl: 1.75rem;
	--radius-sm: 0.375rem;
	--radius-md: 0.5rem;
	--radius-lg: 0.75rem;
}

/* ============================================================================
   Base Styles
   ============================================================================ */

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

html {
	scroll-behavior: smooth;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
		sans-serif;
	background-color: var(--bg-primary);
	color: var(--text-primary);
	line-height: 1.4;
	font-size: 0.95rem;
	padding: var(--spacing-sm);
}

/* ============================================================================
   Typography
   ============================================================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
	font-weight: 600;
	line-height: 1.2;
	margin-bottom: var(--spacing-sm);
	color: var(--text-primary);
}

h1 {
	font-size: 1.75rem;
}

h2 {
	font-size: 1.15rem;
	margin-top: 0;
}

h3 {
	font-size: 1rem;
}

p {
	margin-bottom: var(--spacing-sm);
	color: var(--text-secondary);
}

small {
	font-size: 0.875rem;
	color: var(--text-secondary);
	display: block;
	margin-top: var(--spacing-xs);
}

/* Gold Gradient Text Effect */
.gold-gradient-text {
	background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold-primary) 50%, var(--gold-dark) 100%);
	background-clip: text;
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	display: inline-block;
}

/* ============================================================================
   Layout & Sections
   ============================================================================ */

/* ============================================================================
   Top Bar & Burger Navigation
   ============================================================================ */

.topbar {
	display: flex;
	align-items: center;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-md);
	padding-bottom: var(--spacing-sm);
	border-bottom: 1px solid var(--border-color);
}

.topbar h1 {
	margin: 0;
	font-size: 1.15rem;
}

.nav-toggle {
	flex-shrink: 0;
	width: 2.75rem;
	height: 2.75rem;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 0.3rem;
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-sm);
	cursor: pointer;
	padding: 0;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
	border-color: var(--gold-primary);
}

.burger-line {
	display: block;
	width: 1.375rem;
	height: 2px;
	background-color: var(--gold-primary);
	border-radius: 1px;
}

.nav-menu {
	position: fixed;
	inset: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(10, 10, 10, 0.98);
	padding: var(--spacing-xl) var(--spacing-lg);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: var(--spacing-md);
	z-index: 100;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.2s ease;
}

.nav-menu.open {
	opacity: 1;
	pointer-events: auto;
}

.nav-link {
	text-align: center;
	background: none;
	border: 1px solid transparent;
	border-radius: var(--radius-md);
	color: var(--text-primary);
	font-size: 1.5rem;
	padding: var(--spacing-sm) var(--spacing-xl);
	cursor: pointer;
	width: min(20rem, 90vw);
}

.nav-link:hover {
	background-color: var(--bg-tertiary);
}

.nav-link.nav-link-active {
	background-color: var(--bg-tertiary);
	border-color: var(--gold-primary);
	color: var(--gold-primary);
	font-weight: 600;
}

.nav-close {
	position: absolute;
	top: var(--spacing-md);
	right: var(--spacing-md);
	width: 2.75rem;
	height: 2.75rem;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-sm);
	color: var(--text-primary);
	font-size: 1.75rem;
	line-height: 1;
	cursor: pointer;
}

.nav-close:hover,
.nav-close:focus-visible {
	border-color: var(--gold-primary);
	color: var(--gold-primary);
}

.nav-menu[hidden] {
	display: none;
}

section {
	margin-bottom: var(--spacing-md);
	padding: var(--spacing-md);
	background-color: var(--bg-secondary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
}

.view {
	max-width: 60rem;
	margin: 0 auto;
}

/* ============================================================================
   Compact Price Line
   ============================================================================ */

.price-line {
	margin-bottom: var(--spacing-md);
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-sm);
	display: flex;
	align-items: baseline;
	flex-wrap: wrap;
	gap: var(--spacing-xs);
	font-size: 0.8125rem;
}

.price-label {
	color: var(--text-secondary);
}

.price-value {
	font-size: 0.9375rem;
	font-weight: 700;
	color: var(--gold-primary);
	font-variant-numeric: tabular-nums;
}

.price-unit {
	color: var(--text-secondary);
}

.timestamp {
	color: var(--text-secondary);
	margin-left: auto;
}

.warning-indicator {
	display: flex;
	align-items: center;
	gap: 0.25rem;
	padding: 0.125rem var(--spacing-xs);
	background-color: rgba(251, 191, 36, 0.1);
	border: 1px solid var(--warning-color);
	border-radius: var(--radius-sm);
	color: var(--warning-color);
	font-size: 0.75rem;
}

.warning-icon {
	font-size: 0.875rem;
}

.warning-text {
	margin: 0;
	color: var(--warning-color);
}

/* ============================================================================
   Settings Section
   ============================================================================ */

.settings-section details > summary,
.form-section details > summary,
.config-section details > summary {
	cursor: pointer;
	font-weight: 600;
	font-size: 1.15rem;
	color: var(--text-primary);
	padding: var(--spacing-sm) 0;
	user-select: none;
	list-style: none;
	display: flex;
	align-items: center;
	gap: var(--spacing-xs);
}

.settings-section details > summary::-webkit-details-marker,
.form-section details > summary::-webkit-details-marker,
.config-section details > summary::-webkit-details-marker {
	display: none;
}

.settings-section details > summary::before,
.form-section details > summary::before,
.config-section details > summary::before {
	content: "";
	flex-shrink: 0;
	width: 0.5rem;
	height: 0.5rem;
	border-right: 2px solid var(--text-secondary);
	border-bottom: 2px solid var(--text-secondary);
	transform: rotate(-45deg);
	transition: transform 0.15s ease;
}

details[open] > summary::before {
	transform: rotate(45deg);
}

.settings-section details > summary:hover,
.form-section details > summary:hover,
.config-section details > summary:hover {
	color: var(--gold-primary);
}

.settings-section details > summary:hover::before,
.form-section details > summary:hover::before,
.config-section details > summary:hover::before {
	border-color: var(--gold-primary);
}

.form-section details[open] > summary,
.config-section details[open] > summary {
	margin-bottom: var(--spacing-xs);
}

.settings-content {
	padding-top: var(--spacing-md);
	display: flex;
	flex-direction: column;
	gap: var(--spacing-lg);
}

.setting-group {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.setting-group label {
	font-weight: 500;
	color: var(--text-primary);
}

.manual-price-group {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.person-names-list {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.person-name-row {
	display: flex;
	gap: var(--spacing-sm);
	align-items: center;
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-sm);
}

.person-name-text {
	flex: 1;
	min-width: 0;
	overflow-wrap: anywhere;
}

.person-name-row input {
	flex: 1;
}

.person-name-row button {
	flex-shrink: 0;
	padding: var(--spacing-xs) var(--spacing-sm);
	font-size: 0.875rem;
}

/* ============================================================================
   Forms
   ============================================================================ */

.form-input,
.config-textarea {
	width: 100%;
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	font-family: inherit;
	font-size: 0.9375rem;
	transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.config-textarea:focus {
	outline: none;
	border-color: var(--gold-primary);
	box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-input::placeholder {
	color: var(--text-secondary);
}

select.form-input {
	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='%23b8b8b8' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right var(--spacing-sm) center;
	padding-right: calc(var(--spacing-sm) + 1.5rem);
}

.form-section {
	margin-bottom: var(--spacing-xl);
}

.purchase-form {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-md);
}

.form-row {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-md);
}

.form-group {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.form-group label {
	font-weight: 500;
	color: var(--text-primary);
	font-size: 0.95rem;
}

.form-errors {
	padding: var(--spacing-sm);
	background-color: rgba(248, 113, 113, 0.1);
	border: 1px solid var(--error-color);
	border-radius: var(--radius-md);
	color: var(--error-color);
	font-size: 0.9rem;
	min-height: 0;
}

.form-errors:empty {
	display: none;
}

.form-errors ul {
	list-style-position: inside;
	margin: 0;
	padding: 0;
}

.form-actions {
	display: flex;
	gap: var(--spacing-md);
	flex-wrap: wrap;
	margin-top: var(--spacing-md);
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn {
	padding: var(--spacing-xs) var(--spacing-md);
	border: none;
	border-radius: var(--radius-md);
	font-size: 0.9rem;
	font-weight: 500;
	cursor: pointer;
	transition: all 0.2s;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--spacing-xs);
	user-select: none;
	text-decoration: none;
}

.btn-primary {
	background-color: var(--gold-primary);
	color: #000;
	font-weight: 600;
}

.btn-primary:hover,
.btn-primary:focus {
	background-color: var(--gold-light);
	box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

.btn-primary:active {
	transform: scale(0.98);
}

.btn-secondary {
	background-color: var(--bg-tertiary);
	color: var(--text-primary);
	border: 1px solid var(--border-color);
}

.btn-secondary:hover,
.btn-secondary:focus {
	background-color: var(--border-color);
	border-color: var(--gold-primary);
	color: var(--gold-primary);
}

.btn-sm {
	padding: var(--spacing-xs) var(--spacing-sm);
	font-size: 0.875rem;
}

.btn-danger {
	background-color: transparent;
	color: var(--error-color);
	border: 1px solid var(--error-color);
}

.btn-danger:hover,
.btn-danger:focus {
	background-color: rgba(248, 113, 113, 0.1);
	box-shadow: 0 0 0 2px rgba(248, 113, 113, 0.2);
}

.btn-danger:active {
	transform: scale(0.98);
}

/* ============================================================================
   Filter Section
   ============================================================================ */

.filter-section {
	margin-bottom: var(--spacing-xl);
}

.filter-buttons {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-sm);
}

.analysis-summary {
	margin-top: var(--spacing-md);
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-sm);
}

@media (min-width: 640px) {
	.analysis-summary {
		grid-template-columns: repeat(3, 1fr);
	}
}

.analysis-gain-card .stat-label {
	display: flex;
	align-items: baseline;
	gap: var(--spacing-xs);
}

#analysis-gain-scope {
	text-transform: none;
	font-weight: 400;
	letter-spacing: normal;
	color: var(--text-secondary);
}

.filter-btn {
	padding: var(--spacing-xs) var(--spacing-md);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
	color: var(--text-primary);
	cursor: pointer;
	font-size: 0.95rem;
	transition: all 0.2s;
	white-space: nowrap;
}

.filter-btn:hover {
	border-color: var(--gold-primary);
	color: var(--gold-primary);
}

.filter-btn-active {
	background-color: var(--gold-primary);
	color: #000;
	border-color: var(--gold-primary);
	font-weight: 600;
}

/* ============================================================================
   Dashboard Summary
   ============================================================================ */

.dashboard-summary {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-sm);
}

.stat-card {
	padding: var(--spacing-sm) var(--spacing-md);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.stat-card-hero {
	border-color: var(--gold-dark);
	background-color: rgba(212, 175, 55, 0.06);
}

.stat-card-hero .stat-value {
	font-size: 1.75rem;
}

.stat-label {
	font-size: 0.75rem;
	color: var(--text-secondary);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	font-weight: 600;
}

.stat-content {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.stat-row {
	display: flex;
	align-items: baseline;
	gap: var(--spacing-xs);
	flex-wrap: wrap;
}

.stat-label-small {
	font-size: 0.8125rem;
	color: var(--text-secondary);
	min-width: 4rem;
}

.stat-sep {
	color: var(--text-secondary);
	margin: 0 0.125rem;
}

.stat-value {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--gold-primary);
	font-variant-numeric: tabular-nums;
}

.stat-value-sub {
	font-size: 0.9375rem;
	font-weight: 600;
}

.stat-unit {
	font-size: 0.75rem;
	color: var(--text-secondary);
}

/* ============================================================================
   Purchase List
   ============================================================================ */

.list-section {
	margin-bottom: var(--spacing-xl);
}

.purchase-list {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.purchase-year-heading {
	margin: var(--spacing-sm) 0 0;
	padding-bottom: var(--spacing-xs);
	border-bottom: 1px solid var(--border-color);
	color: var(--gold-primary);
	font-size: 0.9rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.purchase-year-heading:first-child {
	margin-top: 0;
}

.purchase-year-group {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.purchase-item {
	padding: var(--spacing-md);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-md);
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.purchase-header {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	gap: var(--spacing-sm);
}

.purchase-info {
	flex: 1;
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.purchase-date {
	font-size: 0.875rem;
	color: var(--text-secondary);
}

.purchase-person {
	font-weight: 500;
	color: var(--text-primary);
}

.purchase-amount {
	font-size: 1.25rem;
	font-weight: 600;
	color: var(--gold-primary);
}

.purchase-details {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
	gap: var(--spacing-sm);
	font-size: 0.875rem;
	padding-top: var(--spacing-sm);
	border-top: 1px solid var(--border-color);
}

.detail-item {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.detail-label {
	color: var(--text-secondary);
	text-transform: uppercase;
	font-size: 0.75rem;
	letter-spacing: 0.05em;
}

.detail-value {
	color: var(--text-primary);
	font-weight: 500;
}

.purchase-actions {
	display: flex;
	gap: var(--spacing-sm);
	justify-content: flex-end;
}

.purchase-item-empty {
	padding: var(--spacing-lg);
	text-align: center;
	color: var(--text-secondary);
}

.purchase-row {
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--bg-tertiary);
	border: 1px solid var(--border-color);
	border-radius: var(--radius-sm);
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-sm);
}

.purchase-content {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: var(--spacing-xs) var(--spacing-sm);
	flex: 1;
	font-size: 0.8125rem;
}

.purchase-content .purchase-amount {
	font-size: 1rem;
}

.purchase-content .purchase-price {
	color: var(--text-secondary);
}

.purchase-content .purchase-cost,
.purchase-content .purchase-value {
	color: var(--text-secondary);
}

.purchase-content .purchase-gain {
	font-weight: 600;
}

/* ============================================================================
   Chart Section
   ============================================================================ */

.chart-section {
	margin-bottom: var(--spacing-xl);
}

.chart-canvas-wrap {
	position: relative;
	width: 100%;
	height: 220px;
}

@media (min-width: 768px) {
	.chart-canvas-wrap {
		height: 320px;
	}
}

#price-chart {
	max-width: 100%;
}

.chart-fallback {
	padding: var(--spacing-lg);
	background-color: rgba(251, 191, 36, 0.05);
	border: 1px solid var(--warning-color);
	border-radius: var(--radius-md);
	color: var(--text-secondary);
	text-align: center;
	margin-bottom: var(--spacing-lg);
}

.chart-fallback p {
	margin: 0;
}

#chart-section[hidden] {
	display: none;
}

/* ============================================================================
   Config Section
   ============================================================================ */

.config-content {
	padding-top: var(--spacing-md);
	display: flex;
	flex-direction: column;
	gap: var(--spacing-lg);
}

.config-group {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-md);
}

.config-group h3 {
	margin-bottom: 0;
	font-size: 1.1rem;
}

.config-group > p {
	margin-bottom: var(--spacing-sm);
}

.config-textarea {
	font-family: "Courier New", monospace;
	font-size: 0.8125rem;
	min-height: 90px;
	resize: vertical;
}

.config-message {
	padding: var(--spacing-md);
	border-radius: var(--radius-md);
	font-size: 0.9rem;
	min-height: 0;
}

.config-message.success {
	background-color: rgba(74, 222, 128, 0.1);
	border: 1px solid var(--success-color);
	color: var(--success-color);
}

.config-message.error {
	background-color: rgba(248, 113, 113, 0.1);
	border: 1px solid var(--error-color);
	color: var(--error-color);
}

.config-message:empty {
	display: none;
}

/* ============================================================================
   Responsive Design (Tablet & Desktop)
   ============================================================================ */

@media (min-width: 640px) {
	body {
		padding: var(--spacing-md);
	}

	h1 {
		font-size: 2rem;
	}

	.form-row {
		grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	}

	.form-actions {
		justify-content: flex-start;
	}
}

@media (min-width: 768px) {
	body {
		padding: var(--spacing-lg);
		max-width: 1400px;
		margin: 0 auto;
	}

	.dashboard-summary {
		grid-template-columns: repeat(2, 1fr);
	}

	section {
		padding: var(--spacing-lg);
	}

	.filter-buttons {
		gap: var(--spacing-md);
	}

	.form-row {
		grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	}

	.purchase-header {
		flex-direction: row;
		align-items: center;
	}

	.purchase-actions {
		margin-left: auto;
	}

	.config-content {
		grid-template-columns: repeat(2, 1fr);
		gap: var(--spacing-xl);
	}

	.config-group {
		grid-column: auto;
	}
}

@media (min-width: 1024px) {
	.dashboard-summary {
		grid-template-columns: repeat(4, 1fr);
	}

	.form-row {
		grid-template-columns: repeat(3, 1fr);
	}

	.settings-section {
		max-width: 800px;
	}

	.purchase-details {
		grid-template-columns: repeat(4, 1fr);
	}
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

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

.text-right {
	text-align: right;
}

.hidden {
	display: none !important;
}

.loading {
	opacity: 0.6;
	pointer-events: none;
}

.success {
	color: var(--success-color);
}

.error {
	color: var(--error-color);
}

.warning {
	color: var(--warning-color);
}