/* MTranServer Web UI — Google Translate inspired, blue/white/black, no rounded corners.
	 Auto dark mode via prefers-color-scheme; no manual toggle. */

:root {
	--blue: #1a73e8;
	--blue-dark: #1765cc;
	--blue-light: #e8f0fe;
	--blue-ghost: rgba(26, 115, 232, 0.08);

	--bg: #ffffff;
	--bg-alt: #f1f3f4;
	--bg-hover: #f8f9fa;
	--surface: #ffffff;

	--text: #202124;
	--text-secondary: #5f6368;
	--text-muted: #80868b;

	--border: #dadce0;
	--border-strong: #bdbfc3;

	--focus: #1a73e8;
	--error: #d93025;
	--error-bg: #fce8e6;
	--success: #188038;

	--shadow-1: 0 1px 3px rgba(60, 64, 67, 0.3);
	--shadow-2: 0 6px 16px rgba(60, 64, 67, 0.15);
	--shadow-3: 0 12px 32px rgba(60, 64, 67, 0.2);

	--font: "Google Sans", "Segoe UI", Roboto, "Helvetica Neue", Arial,
		"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	--mono: "Roboto Mono", Consolas, "Courier New", monospace;
}

@media (prefers-color-scheme: dark) {
	:root {
		--blue: #8ab4f8;
		--blue-dark: #aecbfa;
		--blue-light: #1e2a3a;
		--blue-ghost: rgba(138, 180, 248, 0.12);

		--bg: #202124;
		--bg-alt: #292a2d;
		--bg-hover: #2d2e31;
		--surface: #292a2d;

		--text: #e8eaed;
		--text-secondary: #9aa0a6;
		--text-muted: #80868b;

		--border: #5f6368;
		--border-strong: #70757a;

		--focus: #8ab4f8;
		--error: #f28b82;
		--error-bg: #4d2f2c;
		--success: #81c995;

		--shadow-1: 0 1px 3px rgba(0, 0, 0, 0.5);
		--shadow-2: 0 6px 16px rgba(0, 0, 0, 0.5);
		--shadow-3: 0 12px 32px rgba(0, 0, 0, 0.6);
	}
}

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

html,
body {
	height: 100%;
}

body {
	font-family: var(--font);
	font-size: 14px;
	line-height: 1.5;
	color: var(--text);
	background: var(--bg);
	-webkit-font-smoothing: antialiased;
	display: flex;
	flex-direction: column;
	transition: background 0.2s ease, color 0.2s ease;
}

button {
	font-family: inherit;
	font-size: inherit;
	color: inherit;
	background: none;
	border: none;
	cursor: pointer;
}

input,
textarea {
	font-family: inherit;
	font-size: inherit;
	color: inherit;
	background: none;
	border: none;
	outline: none;
}

/* ---------------------------------- Layout ---------------------------------- */

.translate-page {
	flex: 1;
	width: 100%;
	max-width: 1024px;
	margin: 0 auto;
	padding: 85px 20px 20px 20px;
	display: flex;
	flex-direction: column;
}

/* ------------------------------- Language bar ------------------------------- */

.language-bar {
	display: flex;
	align-items: stretch;
	gap: 8px;
	margin-bottom: 14px;
}

.lang-select {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: space-between;
	min-height: 40px;
	padding: 0 14px;
	border: 1px solid var(--border);
	background: var(--bg);
	color: var(--text);
	font-size: 15px;
	font-weight: 500;
	cursor: pointer;
	user-select: none;
	border-radius: 0;
	transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.lang-select:hover {
	background: var(--bg-hover);
}

.lang-select:focus-visible {
	border-color: var(--focus);
	box-shadow: inset 0 0 0 2px var(--focus);
}

.lang-select.active {
	border-color: var(--focus);
	box-shadow: inset 0 0 0 2px var(--focus);
	background: var(--bg-hover);
}

.lang-caret {
	display: inline-flex;
	color: var(--text-secondary);
	transition: transform 0.15s ease;
}

.lang-select.active .lang-caret {
	transform: rotate(180deg);
}

.swap-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 40px;
	color: var(--text-secondary);
	border: 1px solid var(--border);
	background: var(--bg);
	transition: color 0.15s ease, background 0.15s ease;
}

.swap-btn:hover {
	color: var(--blue);
	background: var(--bg-hover);
}

.swap-btn:focus-visible {
	color: var(--blue);
	border-color: var(--focus);
	box-shadow: inset 0 0 0 2px var(--focus);
}

/* ------------------------------ Editor panels ------------------------------ */

.editor-panel {
	display: grid;
	grid-template-columns: 1fr 1fr;
	border: 1px solid var(--border);
	background: var(--bg);
	min-height: 260px;
}

.editor {
	display: flex;
	flex-direction: column;
	min-width: 0;
	background: var(--bg);
}

.source-editor {
	border-right: 1px solid var(--border);
}

.editor-toolbar {
	display: flex;
	align-items: center;
	gap: 4px;
	min-height: 38px;
	padding: 0 2px 0 12px;
	border-bottom: 1px solid var(--border);
}

.toolbar-spacer {
	flex: 1;
}

.result-status {
	font-size: 12px;
	color: var(--text-secondary);
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.status-spinner {
	display: inline-block;
	width: 12px;
	height: 12px;
	border: 2px solid var(--border);
	border-top-color: var(--blue);
	border-radius: 50%;
	animation: spin 0.8s linear infinite;
}

@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

.icon-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	color: var(--text-secondary);
	transition: color 0.15s ease, background 0.15s ease;
}

.icon-btn:hover {
	color: var(--blue);
	background: var(--blue-ghost);
}

.icon-btn:focus-visible {
	color: var(--blue);
	box-shadow: inset 0 0 0 2px var(--focus);
}

.icon-btn.flash {
	color: var(--success);
}

.editor-input {
	flex: 1;
	min-height: 150px;
	padding: 14px 16px;
	font-size: 16px;
	line-height: 1.6;
	color: var(--text);
	background: transparent;
	resize: none;
	overflow-y: auto;
	border: none;
	outline: none;
}

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

.output-text {
	flex: 1;
	min-height: 150px;
	padding: 14px 16px;
	font-size: 16px;
	line-height: 1.6;
	color: var(--text);
	white-space: pre-wrap;
	word-break: break-word;
	overflow-y: auto;
}

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

.char-count {
	font-size: 12px;
	color: var(--text-muted);
	font-variant-numeric: tabular-nums;
	padding: 0 16px 6px;
}

.text-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	min-height: 34px;
	padding: 0 16px;
	font-size: 14px;
	font-weight: 500;
	color: var(--text-secondary);
	border: 1px solid var(--border);
	background: var(--bg);
	transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

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

.text-btn.primary {
	color: #ffffff;
	border-color: var(--blue);
	background: var(--blue);
}

.text-btn.primary:hover {
	background: var(--blue-dark);
	border-color: var(--blue-dark);
}

.text-btn:focus-visible {
	box-shadow: inset 0 0 0 2px var(--focus);
}

/* -------------------------------- Dropdown -------------------------------- */

.dropdown {
	position: fixed;
	z-index: 100;
	width: 320px;
	max-width: calc(100vw - 16px);
	background: var(--surface);
	border: 1px solid var(--border);
	box-shadow: var(--shadow-2);
	border-radius: 0;
	overflow: hidden;
}

.dropdown-search {
	padding: 10px;
	border-bottom: 1px solid var(--border);
}

.dropdown-search input {
	width: 100%;
	min-height: 34px;
	padding: 0 10px;
	border: 1px solid var(--border);
	font-size: 14px;
	background: var(--bg);
	transition: border-color 0.15s ease;
}

.dropdown-search input:focus-visible {
	border-color: var(--focus);
	box-shadow: inset 0 0 0 2px var(--focus);
}

.dropdown-list {
	max-height: 300px;
	overflow-y: auto;
	padding: 4px 0;
}

.dropdown-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 8px;
	padding: 10px 16px;
	font-size: 14px;
	cursor: pointer;
	user-select: none;
}

.dropdown-item:hover {
	background: var(--bg-hover);
}

.dropdown-item.focused {
	background: var(--bg-hover);
	box-shadow: inset 2px 0 0 var(--blue);
}

.dropdown-item.active {
	background: var(--blue-ghost);
	color: var(--blue);
}

.dropdown-item .native-name {
	color: var(--text-muted);
	font-size: 13px;
}

.dropdown-item.active .native-name {
	color: var(--blue);
	opacity: 0.8;
}

.dropdown-empty {
	padding: 16px;
	text-align: center;
	color: var(--text-muted);
}

/* ---------------------------------- Modal ---------------------------------- */

.modal-overlay {
	position: fixed;
	inset: 0;
	z-index: 200;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(0, 0, 0, 0.5);
}

.modal-overlay[hidden] {
	display: none;
}

.modal {
	width: 400px;
	max-width: calc(100vw - 40px);
	background: var(--surface);
	border: 1px solid var(--border);
	box-shadow: var(--shadow-3);
	border-radius: 0;
	padding: 24px;
}

.modal-title {
	font-size: 18px;
	font-weight: 500;
	margin-bottom: 8px;
}

.modal-desc {
	font-size: 14px;
	color: var(--text-secondary);
	margin-bottom: 16px;
}

.modal-input {
	width: 100%;
	min-height: 40px;
	padding: 0 12px;
	border: 1px solid var(--border);
	font-size: 14px;
	background: var(--bg);
	transition: border-color 0.15s ease;
}

.modal-input:focus-visible {
	border-color: var(--focus);
	box-shadow: inset 0 0 0 2px var(--focus);
}

.modal-actions {
	display: flex;
	justify-content: flex-end;
	gap: 8px;
	margin-top: 20px;
}

/* ---------------------------------- Toast ---------------------------------- */

.toast {
	position: fixed;
	left: 50%;
	bottom: 28px;
	transform: translateX(-50%);
	z-index: 300;
	max-width: calc(100vw - 40px);
	padding: 10px 18px;
	font-size: 14px;
	color: var(--text);
	background: var(--surface);
	border: 1px solid var(--border);
	box-shadow: var(--shadow-2);
	border-radius: 0;
	animation: toast-in 0.18s ease;
}

.toast.error {
	color: var(--error);
	border-color: var(--error);
	background: var(--error-bg);
}

@keyframes toast-in {
	from {
		opacity: 0;
		transform: translateX(-50%) translateY(8px);
	}
	to {
		opacity: 1;
		transform: translateX(-50%) translateY(0);
	}
}

/* ------------------------------- App footer ------------------------------- */

.app-footer {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 40px;
	padding: 0 24px;
	font-size: 12px;
	color: var(--text-muted);
	border-top: 1px solid var(--border);
	flex-shrink: 0;
}

/* --------------------------------- Scrollbar -------------------------------- */

::-webkit-scrollbar {
	width: 10px;
	height: 10px;
}

::-webkit-scrollbar-thumb {
	background: var(--border-strong);
}

::-webkit-scrollbar-thumb:hover {
	background: var(--text-muted);
}

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

/* -------------------------------- Responsive -------------------------------- */

@media (max-width: 640px) {
	.translate-page {
		padding: 14px 12px;
	}

	.editor-panel {
		grid-template-columns: 1fr;
	}

	.source-editor {
		border-right: none;
		border-bottom: 1px solid var(--border);
	}

	.language-bar {
		gap: 6px;
	}

	.swap-btn {
		min-width: 40px;
	}
}