/**
 * WP Sell Services — Design System
 *
 * Single source of truth for all UI components. Every template, widget,
 * shortcode, and email should use these classes for consistent UX.
 *
 * @package WPSellServices
 * @since   1.2.0
 *
 * Sections:
 *   1. Design Tokens (CSS Variables)
 *   2. Typography
 *   3. Buttons
 *   4. Cards
 *   5. Badges & Status
 *   6. Forms
 *   7. Notices & Alerts
 *   8. Tables
 *   9. Empty States
 *  10. Modals
 *  11. Layout Utilities
 *  12. Loading States
 *  13. Responsive
 */

/* ==========================================================================
   1. DESIGN TOKENS
   ========================================================================== */

:root {
	/* ---- Colors ---- */
	--wpss-primary: #4f46e5;
	--wpss-primary-hover: #4338ca;
	--wpss-primary-light: #eef2ff;
	--wpss-primary-50: rgba(79, 70, 229, 0.08);

	--wpss-text: #111827;
	--wpss-text-secondary: #374151;
	--wpss-text-muted: #6b7280;
	--wpss-text-hint: #9ca3af;

	--wpss-bg: #ffffff;
	--wpss-bg-subtle: #f9fafb;
	--wpss-bg-muted: #f3f4f6;
	--wpss-border: #e5e7eb;
	--wpss-border-light: #f3f4f6;

	--wpss-success: #10b981;
	--wpss-success-light: #ecfdf5;
	--wpss-warning: #f59e0b;
	--wpss-warning-light: #fffbeb;
	--wpss-danger: #ef4444;
	--wpss-danger-light: #fef2f2;
	--wpss-info: #3b82f6;
	--wpss-info-light: #eff6ff;

	--wpss-star: #fbbf24;

	/* ---- Spacing Scale ---- */
	--wpss-space-1: 4px;
	--wpss-space-2: 8px;
	--wpss-space-3: 12px;
	--wpss-space-4: 16px;
	--wpss-space-5: 20px;
	--wpss-space-6: 24px;
	--wpss-space-8: 32px;
	--wpss-space-10: 40px;
	--wpss-space-12: 48px;

	/* ---- Typography ---- */
	--wpss-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--wpss-font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;

	--wpss-text-xs: 12px;
	--wpss-text-sm: 13px;
	--wpss-text-base: 14px;
	--wpss-text-md: 15px;
	--wpss-text-lg: 16px;
	--wpss-text-xl: 18px;
	--wpss-text-2xl: 20px;
	--wpss-text-3xl: 24px;
	--wpss-text-4xl: 30px;

	/* ---- Border Radius ---- */
	--wpss-radius-sm: 6px;
	--wpss-radius: 8px;
	--wpss-radius-lg: 12px;
	--wpss-radius-xl: 16px;
	--wpss-radius-full: 9999px;

	/* ---- Shadows ---- */
	--wpss-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
	--wpss-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
	--wpss-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
	--wpss-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
	--wpss-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

	/* ---- Z-Index Scale ---- */
	--wpss-z-dropdown: 1000;
	--wpss-z-sticky: 1010;
	--wpss-z-fixed: 1020;
	--wpss-z-overlay: 9990;
	--wpss-z-modal: 9991;
	--wpss-z-fab: 9995;

	/* ---- Transitions ---- */
	--wpss-ease: 0.2s ease;
	--wpss-ease-in-out: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   2. TYPOGRAPHY
   ========================================================================== */

.wpss-heading-1 { font-size: var(--wpss-text-4xl); font-weight: 700; color: var(--wpss-text); line-height: 1.2; letter-spacing: -0.02em; margin: 0; }
.wpss-heading-2 { font-size: var(--wpss-text-3xl); font-weight: 700; color: var(--wpss-text); line-height: 1.3; letter-spacing: -0.01em; margin: 0; }
.wpss-heading-3 { font-size: var(--wpss-text-xl); font-weight: 600; color: var(--wpss-text); line-height: 1.4; margin: 0; }
.wpss-heading-4 { font-size: var(--wpss-text-lg); font-weight: 600; color: var(--wpss-text); line-height: 1.4; margin: 0; }
.wpss-body { font-size: var(--wpss-text-base); color: var(--wpss-text-secondary); line-height: 1.6; }
.wpss-caption { font-size: var(--wpss-text-sm); color: var(--wpss-text-muted); line-height: 1.5; }
.wpss-overline { font-size: var(--wpss-text-xs); font-weight: 600; color: var(--wpss-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* ==========================================================================
   3. BUTTONS
   ========================================================================== */

.wpss-btn {
	display: inline-flex; align-items: center; justify-content: center;
	gap: var(--wpss-space-2); padding: 10px 20px;
	font-size: var(--wpss-text-base); font-weight: 600; line-height: 1.4;
	text-decoration: none; border: 2px solid transparent;
	border-radius: var(--wpss-radius); cursor: pointer;
	transition: all var(--wpss-ease-in-out); font-family: inherit;
}

.wpss-btn:hover { text-decoration: none; }
.wpss-btn:active:not(:disabled) { transform: scale(0.97); }
.wpss-btn:focus-visible { outline: 2px solid var(--wpss-primary); outline-offset: 2px; }
.wpss-btn:disabled, .wpss-btn[aria-disabled="true"], .wpss-btn--loading { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.wpss-btn--primary { background: var(--wpss-primary); color: #fff; border-color: var(--wpss-primary); }
.wpss-btn--primary:hover { background: var(--wpss-primary-hover); border-color: var(--wpss-primary-hover); color: #fff; }
.wpss-btn--secondary { background: var(--wpss-bg-muted); color: var(--wpss-text-secondary); }
.wpss-btn--secondary:hover { background: var(--wpss-border); color: var(--wpss-text); }
.wpss-btn--outline { background: transparent; color: var(--wpss-text-secondary); border-color: var(--wpss-border); }
.wpss-btn--outline:hover { border-color: var(--wpss-text-muted); color: var(--wpss-text); }
.wpss-btn--ghost { background: transparent; color: var(--wpss-text-muted); padding: 8px 12px; }
.wpss-btn--ghost:hover { background: var(--wpss-bg-muted); color: var(--wpss-text); }
.wpss-btn--danger { background: var(--wpss-danger); color: #fff; border-color: var(--wpss-danger); }
.wpss-btn--success { background: var(--wpss-success); color: #fff; border-color: var(--wpss-success); }

.wpss-btn--sm { padding: 6px 14px; font-size: var(--wpss-text-sm); }
.wpss-btn--lg { padding: 14px 28px; font-size: var(--wpss-text-lg); }
.wpss-btn--xl { padding: 16px 36px; font-size: var(--wpss-text-xl); }
.wpss-btn--full { width: 100%; }
.wpss-btn--icon { padding: 8px; border-radius: var(--wpss-radius-full); }

/* ==========================================================================
   4. CARDS
   ========================================================================== */

.wpss-card {
	background: var(--wpss-bg); border: 1px solid var(--wpss-border);
	border-radius: var(--wpss-radius-lg); padding: var(--wpss-space-6);
	transition: border-color var(--wpss-ease), box-shadow var(--wpss-ease);
}
.wpss-card--interactive:hover { border-color: var(--wpss-primary); box-shadow: var(--wpss-shadow-sm); }
.wpss-card--flat { border: none; background: var(--wpss-bg-subtle); }
.wpss-card--elevated { border: none; box-shadow: var(--wpss-shadow-md); }

.wpss-card__header { display: flex; align-items: center; justify-content: space-between; gap: var(--wpss-space-4); margin-bottom: var(--wpss-space-5); }
.wpss-card__title { font-size: var(--wpss-text-lg); font-weight: 600; color: var(--wpss-text); display: flex; align-items: center; gap: var(--wpss-space-2); margin: 0; }
.wpss-card__body { color: var(--wpss-text-secondary); font-size: var(--wpss-text-base); line-height: 1.6; }
.wpss-card__footer { display: flex; align-items: center; justify-content: flex-end; gap: var(--wpss-space-3); margin-top: var(--wpss-space-5); padding-top: var(--wpss-space-5); border-top: 1px solid var(--wpss-border-light); }

/* ==========================================================================
   5. BADGES & STATUS
   ========================================================================== */

.wpss-badge {
	display: inline-flex; align-items: center; gap: 4px;
	padding: 3px 10px; font-size: var(--wpss-text-xs); font-weight: 600;
	border-radius: var(--wpss-radius-full); text-transform: uppercase; letter-spacing: 0.03em; line-height: 1.5;
}
.wpss-badge--primary { background: var(--wpss-primary-light); color: var(--wpss-primary); }
.wpss-badge--success { background: var(--wpss-success-light); color: #065f46; }
.wpss-badge--warning { background: var(--wpss-warning-light); color: #92400e; }
.wpss-badge--danger  { background: var(--wpss-danger-light); color: #991b1b; }
.wpss-badge--info    { background: var(--wpss-info-light); color: #1e40af; }
.wpss-badge--neutral { background: var(--wpss-bg-muted); color: var(--wpss-text-muted); }

/* ==========================================================================
   6. FORMS
   ========================================================================== */

.wpss-field { margin-bottom: var(--wpss-space-5); }
.wpss-field__label { display: block; font-size: var(--wpss-text-base); font-weight: 500; color: var(--wpss-text); margin-bottom: var(--wpss-space-2); }
.wpss-field__label .wpss-required { color: var(--wpss-danger); }

.wpss-field__input, .wpss-field__select, .wpss-field__textarea {
	width: 100%; padding: 10px 14px; font-size: var(--wpss-text-base); font-family: inherit;
	color: var(--wpss-text); background: var(--wpss-bg);
	border: 1px solid var(--wpss-border); border-radius: var(--wpss-radius);
	transition: border-color var(--wpss-ease), box-shadow var(--wpss-ease);
}
.wpss-field__input:focus, .wpss-field__select:focus, .wpss-field__textarea:focus {
	outline: none; border-color: var(--wpss-primary); box-shadow: 0 0 0 3px var(--wpss-primary-50);
}
.wpss-field__input::placeholder, .wpss-field__textarea::placeholder { color: var(--wpss-text-hint); }
.wpss-field__hint { font-size: var(--wpss-text-sm); color: var(--wpss-text-muted); margin-top: var(--wpss-space-1); }
.wpss-field__error { font-size: var(--wpss-text-sm); color: var(--wpss-danger); margin-top: var(--wpss-space-1); }
.wpss-field--error .wpss-field__input, .wpss-field--error .wpss-field__select { border-color: var(--wpss-danger); }

/* ==========================================================================
   7. NOTICES & ALERTS
   ========================================================================== */

.wpss-notice {
	display: flex; align-items: flex-start; gap: var(--wpss-space-3);
	padding: var(--wpss-space-4) var(--wpss-space-5); border-radius: var(--wpss-radius-lg);
	font-size: var(--wpss-text-base); line-height: 1.5; margin-bottom: var(--wpss-space-5);
}
.wpss-notice--success { background: var(--wpss-success-light); color: #065f46; border: 1px solid #a7f3d0; }
.wpss-notice--error   { background: var(--wpss-danger-light); color: #991b1b; border: 1px solid #fecaca; }
.wpss-notice--warning { background: var(--wpss-warning-light); color: #92400e; border: 1px solid #fde68a; }
.wpss-notice--info    { background: var(--wpss-info-light); color: #1e40af; border: 1px solid #bfdbfe; }

/* Banner */
.wpss-banner { display: flex; align-items: center; gap: var(--wpss-space-4); padding: var(--wpss-space-5) var(--wpss-space-6); border-radius: var(--wpss-radius-lg); margin-bottom: var(--wpss-space-6); }
.wpss-banner--warning { background: linear-gradient(135deg, #fff7ed, #fffbeb); border: 1px solid #fed7aa; }
.wpss-banner__icon { font-size: 28px; line-height: 1; flex-shrink: 0; }
.wpss-banner__content { flex: 1; }
.wpss-banner__title { display: block; font-weight: 600; font-size: var(--wpss-text-md); color: #92400e; margin-bottom: 2px; }
.wpss-banner__text { font-size: var(--wpss-text-sm); color: #a16207; }
.wpss-banner__action { flex-shrink: 0; white-space: nowrap; }

/* ==========================================================================
   8. TABLES
   ========================================================================== */

.wpss-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--wpss-radius-lg); border: 1px solid var(--wpss-border); }
.wpss-table { width: 100%; border-collapse: collapse; }
.wpss-table th { text-align: left; padding: var(--wpss-space-3) var(--wpss-space-4); font-size: var(--wpss-text-xs); font-weight: 600; color: var(--wpss-text-muted); text-transform: uppercase; letter-spacing: 0.05em; background: var(--wpss-bg-subtle); border-bottom: 1px solid var(--wpss-border); }
.wpss-table td { padding: var(--wpss-space-4); font-size: var(--wpss-text-base); color: var(--wpss-text-secondary); border-bottom: 1px solid var(--wpss-border-light); }
.wpss-table tbody tr:last-child td { border-bottom: none; }
.wpss-table tbody tr:hover { background: var(--wpss-bg-subtle); }

/* ==========================================================================
   9. EMPTY STATES
   ========================================================================== */

.wpss-empty { text-align: center; padding: var(--wpss-space-12) var(--wpss-space-6); }
.wpss-empty__icon { font-size: 48px; margin-bottom: var(--wpss-space-4); line-height: 1; color: var(--wpss-text-hint); }
.wpss-empty__title { font-size: var(--wpss-text-xl); font-weight: 600; color: var(--wpss-text); margin: 0 0 var(--wpss-space-2); }
.wpss-empty__text { font-size: var(--wpss-text-md); color: var(--wpss-text-muted); margin: 0 0 var(--wpss-space-6); max-width: 400px; margin-left: auto; margin-right: auto; line-height: 1.6; }

/* ==========================================================================
   10. MODALS
   ========================================================================== */

.wpss-modal { position: fixed; inset: 0; z-index: var(--wpss-z-modal); display: none; align-items: center; justify-content: center; padding: var(--wpss-space-5); }
.wpss-modal.wpss-modal-open { display: flex; }
.wpss-modal__overlay { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(2px); }
.wpss-modal__dialog { position: relative; background: var(--wpss-bg); border-radius: var(--wpss-radius-xl); padding: var(--wpss-space-8); max-width: 480px; width: 100%; box-shadow: var(--wpss-shadow-xl); max-height: 90vh; overflow-y: auto; }
.wpss-modal__close { position: absolute; top: var(--wpss-space-4); right: var(--wpss-space-4); background: none; border: none; cursor: pointer; padding: var(--wpss-space-1); color: var(--wpss-text-hint); transition: color var(--wpss-ease); border-radius: var(--wpss-radius); }
.wpss-modal__close:hover { color: var(--wpss-text); }
.wpss-modal__close:focus-visible { outline: 2px solid var(--wpss-primary); outline-offset: 2px; }
.wpss-modal__title { font-size: var(--wpss-text-2xl); font-weight: 600; color: var(--wpss-text); margin: 0 0 var(--wpss-space-6); padding-right: var(--wpss-space-10); }
.wpss-modal__actions { display: flex; gap: var(--wpss-space-3); justify-content: flex-end; margin-top: var(--wpss-space-6); }

/* ==========================================================================
   11. LAYOUT UTILITIES
   ========================================================================== */

.wpss-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--wpss-space-5); }
.wpss-container--sm { max-width: 640px; }
.wpss-container--md { max-width: 800px; }
.wpss-container--lg { max-width: 1000px; }

.wpss-grid { display: grid; gap: var(--wpss-space-6); }
.wpss-grid--2 { grid-template-columns: repeat(2, 1fr); }
.wpss-grid--3 { grid-template-columns: repeat(3, 1fr); }
.wpss-grid--4 { grid-template-columns: repeat(4, 1fr); }

.wpss-layout { display: grid; gap: var(--wpss-space-8); }
.wpss-layout--sidebar-right { grid-template-columns: 1fr 360px; }
.wpss-layout--sidebar-left { grid-template-columns: 360px 1fr; }

.wpss-stack { display: flex; flex-direction: column; }
.wpss-stack--sm { gap: var(--wpss-space-2); }
.wpss-stack--md { gap: var(--wpss-space-4); }
.wpss-stack--lg { gap: var(--wpss-space-6); }

.wpss-row { display: flex; align-items: center; }
.wpss-row--between { justify-content: space-between; }
.wpss-row--center { justify-content: center; }
.wpss-row--gap { gap: var(--wpss-space-3); }

.wpss-divider { height: 1px; background: var(--wpss-border-light); margin: var(--wpss-space-5) 0; border: none; }
.wpss-sticky { position: sticky; top: var(--wpss-sticky-top, 32px); align-self: start; }

/* ==========================================================================
   12. LOADING STATES
   ========================================================================== */

.wpss-spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: wpss-spin 0.6s linear infinite; }
.wpss-spinner--lg { width: 24px; height: 24px; border-width: 3px; }
@keyframes wpss-spin { to { transform: rotate(360deg); } }

.wpss-skeleton { background: linear-gradient(90deg, var(--wpss-bg-muted) 25%, var(--wpss-bg-subtle) 50%, var(--wpss-bg-muted) 75%); background-size: 200% 100%; animation: wpss-shimmer 1.5s ease-in-out infinite; border-radius: var(--wpss-radius); }
@keyframes wpss-shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ==========================================================================
   13. RESPONSIVE
   ========================================================================== */

@media (max-width: 768px) {
	.wpss-grid--2, .wpss-grid--3, .wpss-grid--4 { grid-template-columns: 1fr; }
	.wpss-layout--sidebar-right, .wpss-layout--sidebar-left { grid-template-columns: 1fr; }
	.wpss-modal__dialog { padding: var(--wpss-space-6); margin: var(--wpss-space-4); }
	.wpss-modal__actions { flex-direction: column; }
	.wpss-modal__actions .wpss-btn { width: 100%; }
	.wpss-banner { flex-direction: column; text-align: center; gap: var(--wpss-space-3); }
	.wpss-banner__action { width: 100%; }
}

@media (max-width: 480px) {
	.wpss-card { padding: var(--wpss-space-4); }
	.wpss-btn--lg { width: 100%; }
}