/**
 * Shared design system for 佑恒烟酒 ordering application.
 * Mobile-first responsive design.
 * Used by both index.html (customer) and admin.html (admin).
 */

/* ============================================
   CSS Reset & Variables
   ============================================ */

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

:root {
	/* Earthy warm palette */
	--primary: #5c4033;
	--primary-light: #6d4f3e;
	--secondary: #4a3428;
	--accent: #c8956c;
	--accent-hover: #d9a87e;
	--accent-glow: rgba(200, 149, 108, 0.3);
	--bg: #3b2a1f;
	--bg-elevated: #473322;
	--text: #ffffff;
	--text-secondary: #c4b5a6;
	--text-muted: #8c7b6b;
	--success: #6abf69;
	--success-bg: rgba(106, 191, 105, 0.18);
	--warning: #e6a647;
	--warning-bg: rgba(230, 166, 71, 0.18);
	--info: #6aadcf;
	--info-bg: rgba(106, 173, 207, 0.18);
	--danger: #d96b5a;
	--danger-bg: rgba(217, 107, 90, 0.18);
	--card-bg: #4d372a;
	--card-border: rgba(255, 255, 255, 0.08);
	--border: rgba(255, 255, 255, 0.1);
	--shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
	--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
	--shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.3);
	--radius-sm: 8px;
	--radius-md: 12px;
	--radius-lg: 16px;
	--transition-fast: 0.15s ease;
	--transition-normal: 0.25s ease;
	--transition-slow: 0.35s ease;

	/* Safe area for notched phones */
	--safe-top: env(safe-area-inset-top, 0px);
	--safe-bottom: env(safe-area-inset-bottom, 0px);
	--safe-left: env(safe-area-inset-left, 0px);
	--safe-right: env(safe-area-inset-right, 0px);
}

/* ============================================
   Base Typography & Body
   ============================================ */

html {
	font-size: 16px;
	-webkit-text-size-adjust: 100%;
}

body {
	font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
	background: var(--bg);
	color: var(--text);
	min-height: 100vh;
	min-height: 100dvh;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

/* ============================================
   Header
   ============================================ */

.header {
	background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
	padding: 0.875rem 1rem;
	padding-top: calc(0.875rem + var(--safe-top));
	position: sticky;
	top: 0;
	z-index: 100;
	box-shadow: var(--shadow-md);
	border-bottom: 1px solid var(--border);
}

.header h1 {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--accent);
	letter-spacing: 0.04em;
}

/* ============================================
   Layout
   ============================================ */

.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 1rem;
	padding-left: calc(1rem + var(--safe-left));
	padding-right: calc(1rem + var(--safe-right));
}

/* ============================================
   Buttons — larger touch targets for mobile
   ============================================ */

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	padding: 0.75rem 1.25rem;
	font-size: 0.9375rem;
	font-weight: 600;
	font-family: inherit;
	border: none;
	border-radius: var(--radius-md);
	cursor: pointer;
	transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
	white-space: nowrap;
	min-height: 44px; /* iOS minimum touch target */
	-webkit-tap-highlight-color: transparent;
	touch-action: manipulation;
}

.btn:hover {
	transform: translateY(-1px);
}

.btn:active {
	transform: scale(0.97);
}

.btn-primary {
	background: var(--accent);
	color: #2a1a0e;
}

.btn-primary:hover {
	background: var(--accent-hover);
	box-shadow: 0 4px 15px var(--accent-glow);
}

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

.btn-secondary:hover {
	background: var(--primary-light);
}

.btn-danger {
	background: var(--danger);
	color: var(--text);
}

.btn-danger:hover {
	box-shadow: 0 4px 15px rgba(217, 107, 90, 0.3);
}

.btn-sm {
	padding: 0.5rem 0.875rem;
	font-size: 0.8125rem;
	min-height: 36px;
	border-radius: var(--radius-sm);
}

.btn-ghost {
	background: transparent;
	color: var(--text-secondary);
	border: 1px solid var(--border);
}

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

.btn:disabled {
	opacity: 0.5;
	cursor: not-allowed;
	transform: none;
}

/* ============================================
   Form Elements — mobile optimized
   ============================================ */

.form-group {
	margin-bottom: 1rem;
}

.form-label {
	display: block;
	margin-bottom: 0.375rem;
	font-size: 0.8125rem;
	font-weight: 500;
	color: var(--text-secondary);
	letter-spacing: 0.01em;
}

.form-input {
	width: 100%;
	padding: 0.875rem 1rem;
	font-size: 1rem; /* 16px prevents iOS zoom on focus */
	font-family: inherit;
	background: var(--secondary);
	border: 1.5px solid transparent;
	border-radius: var(--radius-md);
	color: var(--text);
	transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
	-webkit-appearance: none;
	appearance: none;
}

.form-input:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-row {
	display: flex;
	gap: 0.75rem;
}

.form-row .form-group {
	flex: 1;
}

/* ============================================
   Cards
   ============================================ */

.card {
	background: var(--card-bg);
	border: 1px solid var(--card-border);
	border-radius: var(--radius-lg);
	overflow: hidden;
	box-shadow: var(--shadow-sm);
}

/* ============================================
   Tables
   ============================================ */

.table-wrapper {
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
}

.table {
	width: 100%;
	border-collapse: collapse;
	min-width: 500px; /* ensures scrollability on mobile */
}

.table th,
.table td {
	padding: 0.75rem 0.875rem;
	text-align: left;
	border-bottom: 1px solid var(--border);
}

.table th {
	font-weight: 600;
	color: var(--text-secondary);
	font-size: 0.6875rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	background: var(--secondary);
	position: sticky;
	top: 0;
	white-space: nowrap;
}

.table tbody tr {
	transition: background var(--transition-fast);
}

.table tbody tr:hover {
	background: rgba(255, 255, 255, 0.03);
}

.table tbody tr:last-child td {
	border-bottom: none;
}

/* ============================================
   Badges
   ============================================ */

.badge {
	display: inline-flex;
	align-items: center;
	padding: 0.25rem 0.625rem;
	font-size: 0.6875rem;
	font-weight: 600;
	border-radius: 100px;
	letter-spacing: 0.02em;
	white-space: nowrap;
}

.badge-pending {
	background: var(--warning-bg);
	color: var(--warning);
}

.badge-confirmed {
	background: var(--info-bg);
	color: var(--info);
}

.badge-completed {
	background: var(--success-bg);
	color: var(--success);
}

.badge-cancelled {
	background: var(--danger-bg);
	color: var(--danger);
}

/* ============================================
   Modal / Overlay
   ============================================ */

.modal-overlay {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(0, 0, 0, 0.7);
	backdrop-filter: blur(4px);
	display: flex;
	align-items: flex-end; /* slide up from bottom on mobile */
	justify-content: center;
	z-index: 1000;
	opacity: 0;
	visibility: hidden;
	transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
	opacity: 1;
	visibility: visible;
}

.modal {
	background: var(--card-bg);
	border: 1px solid var(--card-border);
	padding: 1.5rem;
	padding-bottom: calc(1.5rem + var(--safe-bottom));
	border-radius: var(--radius-lg) var(--radius-lg) 0 0;
	width: 100%;
	max-width: 480px;
	max-height: 90vh;
	max-height: 90dvh;
	overflow-y: auto;
	transform: translateY(100%);
	transition: transform var(--transition-normal);
	box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
	transform: translateY(0);
}

.modal h2 {
	font-size: 1.125rem;
	font-weight: 700;
	margin-bottom: 1.25rem;
}

.modal-actions {
	display: flex;
	gap: 0.75rem;
	margin-top: 1.25rem;
}

.modal-actions .btn {
	flex: 1;
	padding: 0.875rem;
}

/* ============================================
   Toast Notification
   ============================================ */

.toast {
	position: fixed;
	bottom: calc(1.5rem + var(--safe-bottom));
	left: 50%;
	transform: translateX(-50%) translateY(120%);
	padding: 0.875rem 1.5rem;
	border-radius: var(--radius-md);
	font-size: 0.875rem;
	font-weight: 600;
	z-index: 2000;
	opacity: 0;
	transition: transform var(--transition-normal), opacity var(--transition-normal);
	box-shadow: var(--shadow-lg);
	pointer-events: none;
	max-width: calc(100vw - 2rem);
	text-align: center;
}

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

.toast.success {
	background: var(--success);
	color: white;
}

.toast.error {
	background: var(--danger);
	color: white;
}

.toast.info {
	background: var(--info);
	color: white;
}

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

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

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

.empty-state {
	text-align: center;
	padding: 2.5rem 1rem;
	color: var(--text-muted);
}

.empty-state-icon {
	font-size: 2.5rem;
	margin-bottom: 0.75rem;
	opacity: 0.5;
}

.empty-state-text {
	font-size: 0.9375rem;
}

.loading {
	text-align: center;
	padding: 3rem;
	color: var(--text-secondary);
}

.loading::after {
	content: '';
	display: inline-block;
	width: 1.25rem;
	height: 1.25rem;
	border: 2px solid var(--text-muted);
	border-top-color: var(--accent);
	border-radius: 50%;
	animation: spin 0.8s linear infinite;
	margin-left: 0.5rem;
	vertical-align: middle;
}

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

.actions {
	display: flex;
	gap: 0.5rem;
	flex-wrap: wrap;
}

/* ============================================
   Responsive — Mobile First
   ============================================ */

/* Small phones */
@media (max-width: 374px) {
	html {
		font-size: 14px;
	}
}

/* Tablet and up */
@media (min-width: 768px) {
	.header {
		padding: 1.25rem 1.5rem;
	}

	.header h1 {
		font-size: 1.5rem;
	}

	.container {
		padding: 1.5rem;
	}

	.modal-overlay {
		align-items: center; /* center modal on desktop */
	}

	.modal {
		border-radius: var(--radius-lg);
		padding: 2rem;
		padding-bottom: 2rem;
		width: 90%;
	}
}

/* Desktop */
@media (min-width: 1024px) {
	.container {
		padding: 2rem 1.5rem;
	}
}