/* === layout.css ===
   Grid shell, sidebars, main content area, media queries, containers */

:root {
	--sidebar-nav-width: 24rem;
	--sidebar-info-width: 22.857rem;
	--container-max-width: 57.143rem;
	--main-content-padding-top: 4.285rem;
}

.shell {
	display: grid;
	grid-template-columns: 1fr;
	min-height: 100vh;
	min-height: 100dvh;
}

@media (max-width: 73.142rem) {
	.shell.is-logged-in {
		/* Restore natural scroll behavior */
		height: auto;
		overflow: visible;
		position: static;
	}
}

/* Навигация (Слева) — Rail + Panel */
.sidebar-nav {
	display: none;
	background: var(--background-secondary);
	border-right: var(--divider-width) solid var(--divider-color);
	padding: 0;
	height: 100vh;
	overflow: hidden;
}

/* .sidebar-nav .small-label removed - handled by base .small-label */

.sidebar-nav .button-grid {
	gap: 0;
}

/* === Side Rail === */
.side-rail {
	width: var(--rail-width);
	height: 100%;
	flex-shrink: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: var(--size-4-3) 0;
	background: var(--background-secondary);
	border-right: var(--divider-width) solid var(--divider-color);
}

.rail-group-top {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--size-4-1);
	width: 100%;
	flex-shrink: 0;
}

.rail-group-mid {
	flex: 1;
	width: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--size-4-1);
	overflow-y: auto;
	scrollbar-width: none; /* Firefox */
}

.rail-group-mid::-webkit-scrollbar {
	display: none; /* Chrome/Safari/Edge */
}

.rail-group-bottom {
	margin-top: auto;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--size-4-1);
	width: 100%;
	flex-shrink: 0;
}

.rail-btn {
	width: var(--rail-item-size);
	height: var(--rail-item-size);
	border-radius: var(--button-radius);
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--text-muted);
	background: transparent;
	border: none;
	cursor: pointer;
	transition: background var(--anim-fast), color var(--anim-fast);
	padding: 0;
}

.rail-btn .btn-icon {
	width: var(--rail-icon-size);
	height: var(--rail-icon-size);
}

.rail-btn:hover {
	background: var(--background-modifier-hover);
	color: var(--interactive-accent);
}

.rail-btn.active {
	background: var(--interactive-accent-soft);
	color: var(--interactive-accent);
}

/* Tooltips for Desktop Rail */
@media (min-width: 73.143rem) {
	.rail-btn {
		position: relative;
	}

	.rail-btn::after {
		content: attr(title);
		position: absolute;
		left: 100%;
		top: 50%;
		transform: translateY(-50%) translateX(var(--size-4-3));
		background: var(--background-secondary-alt);
		color: var(--text-normal);
		padding: var(--size-4-2) var(--size-4-3);
		border-radius: var(--radius-m);
		font-size: var(--font-ui-small);
		font-weight: 500;
		white-space: nowrap;
		opacity: 0;
		pointer-events: none;
		transition: opacity var(--anim-fast), transform var(--anim-fast);
		z-index: var(--z-header);
		box-shadow: var(--shadow-m);
		border: var(--divider-width) solid var(--divider-color);
	}

	.rail-btn:hover::after {
		opacity: 1;
		transform: translateY(-50%) translateX(var(--size-4-4));
	}
}

.rail-divider {
	width: var(--size-4-6);
	height: var(--divider-width);
	background: var(--divider-color);
	margin: var(--size-4-1) 0;
}

/* === Sidebar Panel === */
.sidebar-panel {
	flex: 1;
	overflow-y: auto;
	min-width: 0;
	min-height: 0;
}

.nav-group-wrapper {
	background: transparent;
	border-radius: 0;
	overflow: hidden;
	margin: var(--size-4-6) 0; /* Увеличен до 1.5rem эквивалента */
}

.sidebar-panel .nav-group-wrapper {
	margin: var(--size-4-2) 0;
}

.nav-group-wrapper .button-grid {
	gap: 0;
}

.nav-group-wrapper .nav-btn {
	border-radius: 0;
}

/* First item in a group has no top border (group boundary serves as separator) */
.nav-group-wrapper .nav-btn:first-child {
	border-top: none;
}

/* Основной контент (Центр) */
.main-content-area {
	display: flex;
	flex-direction: column;
	background: var(--background-primary);
	max-width: 100%;
	padding: var(--header-offset, 5.5rem) var(--size-4-5) var(--size-4-5) var(--size-4-5);
	min-height: 100dvh;
	position: relative;
	overflow-y: auto; /* Скролл по умолчанию включен */
	height: auto;     /* Высота по умолчанию автоматическая */
}

/* Режим «Приложения» (App Mode): Включается только для мессенджера */
.main-content-area:has(.chat-view) {
	height: 100%;      /* Десктопная сетка shell */
	overflow: hidden;  /* Блокируем внешний скролл */
}

.main-content-area:has(.chat-view) > .container,
.main-content-area:has(.chat-view) #app-workspace {
	height: 100%;
	display: flex;
	flex-direction: column;
	min-height: 0;
}

@media (max-width: 73.142rem) {
	.main-content-area {
		padding: var(--header-offset, 5.5rem) var(--size-4-5) var(--size-4-5) var(--size-4-5);
		/* По умолчанию на мобильных обычный скролл страницы */
		height: auto;
		min-height: 100dvh;
		overflow-y: auto;
	}

	/* Мобильный App Mode: фиксированный фрейм под высоту вьюпорта */
	.main-content-area:has(.chat-view) {
		height: 100dvh;
		min-height: 100dvh;
		overflow: hidden; 
		padding-top: 3.5rem; 
		padding-bottom: 0;
	}
}

@media (min-width: 73.143rem) {
	.main-content-area {
		padding: var(--size-4-5);
	}
}

/* Инфо-панель (Справа) */
.sidebar-info {
	display: none;
	background: var(--background-secondary);
	border-left: var(--divider-width) solid var(--divider-color);
	padding: 0;
	overflow-y: auto;
}

@media (min-width: 73.143rem) {
	.shell.is-logged-in {
		grid-template-columns: var(--sidebar-nav-width) 1fr var(--sidebar-info-width);
		transition: grid-template-columns var(--anim-speed) var(--transition-base);
		height: 100vh;
		max-height: 100vh;
		overflow: hidden;
	}

	.shell.is-logged-in.news-panel-hidden {
		grid-template-columns: var(--sidebar-nav-width) 1fr 0;
	}

	.is-logged-in .sidebar-nav {
		display: flex;
		height: 100vh;
		max-height: 100vh;
	}

	.is-logged-in .sidebar-info {
		display: block;
		transition: transform var(--anim-speed) var(--transition-base), opacity var(--anim-speed) var(--transition-base);
		overflow: hidden;
	}

	.news-panel-hidden .sidebar-info {
		transform: translateX(100%);
		opacity: 0;
		pointer-events: none;
	}

	.news-panel-hidden .main-content-area {
		border-right: none;
	}

	.is-logged-in .main-content-area {
		border-left: var(--divider-width) solid var(--divider-color);
		border-right: var(--divider-width) solid var(--divider-color);
	}
}

.container {
	width: 100%;
	max-width: var(--container-max-width);
	margin: 0 auto;
	box-sizing: border-box;
}


/* === Content Footer (Sticky) === */
.content-footer {
	margin-top: auto;
	padding: var(--size-4-5) 0;
	border-top: var(--divider-width) solid var(--divider-color);
}

.list-wrapper {
	margin: var(--size-4-4) 0;
}

.list-wrapper h4 {
	margin-bottom: var(--size-4-3);
	color: var(--text-muted);
	font-size: var(--font-ui-medium);
	text-transform: uppercase;
	letter-spacing: 0.036rem;
}

/* === User Settings === */
.settings-greeting {
	margin-bottom: var(--size-4-4);
}

.settings-accent-span {
	color: var(--interactive-accent);
	font-weight: 600;
}

.settings-separator {
	margin-top: var(--size-4-8);
	border-top: var(--divider-width) solid var(--background-modifier-border);
	padding-top: var(--size-4-4);
	width: 100%;
}

/* === Branding & Search (index.html) === */
.brand-logo {
	display: block;
	height: var(--size-4-8); /* ~32px */
	width: auto;
	margin: 0;
	border-radius: var(--radius-s);
}

.search-filter-wrapper {
	padding: var(--size-4-4) var(--drawer-content-padding);
}

.news-loading-hint {
	padding: var(--size-4-4);
}

.empty-state-hint {
	padding: var(--drawer-content-padding);
}

/* === Modal System === */
.ui-modal-backdrop {
	position: fixed;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	width: 100dvw;
	height: 100dvh;
	background-color: var(--background-modifier-overlay);
	backdrop-filter: blur(2px);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: var(--z-overlay);
	padding: var(--size-4-4);
}

.ui-modal {
	background-color: var(--background-secondary);
	border: var(--divider-width) solid var(--background-modifier-border);
	border-radius: var(--radius-m);
	box-shadow: var(--shadow-m);
	width: 100%;
	max-width: 22rem;
	padding: var(--size-4-6);
	text-align: center;
	/* No ADHD animations: minimalism and clarity */
}

.ui-modal-title {
	margin-top: 0;
	font-size: var(--h2-size);
	font-weight: 700;
	margin-bottom: var(--size-4-4);
}

.ui-modal-body {
	margin-bottom: var(--size-4-6);
	color: var(--text-muted);
	line-height: 1.4;
}