/**
 * SQC Chart Generator Pro - Styles
 * Version: 1.5.0
 * Modern, responsive, card-based UI with full RTL/LTR support
 * Scoped to .sqc-app to avoid theme conflicts
 */

/* ========================================================================
   CSS Custom Properties
   ======================================================================== */
:root {
    --sqc-font-ltr: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, Roboto, 'Helvetica Neue', Arial, sans-serif;
    --sqc-font-rtl: 'Almarai', 'Cairo', 'Noto Kufi Arabic', 'Segoe UI', system-ui, sans-serif;
    --sqc-font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;

    /* Colors */
    --sqc-primary: #4f46e5;
    --sqc-primary-hover: #4338ca;
    --sqc-primary-light: #eef2ff;
    --sqc-primary-50: #e0e7ff;

    --sqc-success: #059669;
    --sqc-success-light: #ecfdf5;
    --sqc-warning: #d97706;
    --sqc-warning-light: #fffbeb;
    --sqc-danger: #dc2626;
    --sqc-danger-light: #fef2f2;
    --sqc-info: #2563eb;
    --sqc-info-light: #eff6ff;

    /* Neutrals */
    --sqc-gray-50: #f9fafb;
    --sqc-gray-100: #f3f4f6;
    --sqc-gray-200: #e5e7eb;
    --sqc-gray-300: #d1d5db;
    --sqc-gray-400: #9ca3af;
    --sqc-gray-500: #6b7280;
    --sqc-gray-600: #4b5563;
    --sqc-gray-700: #374151;
    --sqc-gray-800: #1f2937;
    --sqc-gray-900: #111827;

    /* Surfaces */
    --sqc-bg: #f0f2f5;
    --sqc-surface: #ffffff;
    --sqc-surface-hover: #fafafa;

    /* Borders & Shadows */
    --sqc-border: #e5e7eb;
    --sqc-border-focus: #4f46e5;
    --sqc-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --sqc-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --sqc-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --sqc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Radius */
    --sqc-radius-sm: 6px;
    --sqc-radius: 10px;
    --sqc-radius-lg: 14px;
    --sqc-radius-xl: 18px;

    /* Spacing */
    --sqc-space-xs: 4px;
    --sqc-space-sm: 8px;
    --sqc-space-md: 16px;
    --sqc-space-lg: 24px;
    --sqc-space-xl: 32px;
    --sqc-space-2xl: 48px;

    /* Transitions */
    --sqc-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================================================
   Base — .sqc-app container
   ======================================================================== */
.sqc-app {
    box-sizing: border-box;
    font-size: 15px;
    line-height: 1.6;
    color: var(--sqc-gray-800);
    background: var(--sqc-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    border-radius: var(--sqc-radius-lg);
    letter-spacing: normal;
    word-spacing: normal;
    text-indent: 0;
    text-transform: none;
}

.sqc-app *,
.sqc-app *::before,
.sqc-app *::after {
    box-sizing: border-box;
}

/* LTR font */
.sqc-app[dir="ltr"],
.sqc-app:not([dir]) {
    font-family: var(--sqc-font-ltr);
}

/* RTL font */
.sqc-app[dir="rtl"] {
    font-family: var(--sqc-font-rtl);
    line-height: 1.8;
}

/* ========================================================================
   Admin context — full page
   ======================================================================== */
.sqc-admin-wrap {
    margin: 0;
    padding: 0;
    max-width: 100%;
}

.sqc-admin-wrap .sqc-app {
    min-height: 100vh;
    border-radius: 0;
}

.sqc-admin-wrap .sqc-header {
    position: sticky;
    top: 0;
    z-index: 100;
}

/* WP admin bar offset */
@media screen and (min-width: 601px) {
    .sqc-admin-wrap .sqc-header {
        top: 32px;
    }
}

/* ========================================================================
   Shortcode context — embedded in page (no header/footer)
   ======================================================================== */
.sqc-shortcode-wrap .sqc-app {
    margin: 0;
    border-radius: var(--sqc-radius-lg);
    box-shadow: var(--sqc-shadow-lg);
}

/* When no header, layout starts directly */
.sqc-shortcode-wrap .sqc-app > .sqc-layout:first-child {
    padding-top: var(--sqc-space-lg);
}

/* ========================================================================
   Header
   ======================================================================== */
.sqc-app .sqc-header {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: #fff;
    padding: var(--sqc-space-lg) var(--sqc-space-xl);
}

.sqc-app .sqc-header__inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sqc-space-md);
}

.sqc-app .sqc-header__brand {
    display: flex;
    align-items: center;
    gap: var(--sqc-space-sm);
}

.sqc-app .sqc-header__icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.sqc-app .sqc-header__title {
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    letter-spacing: normal;
    text-transform: none;
    line-height: 1.3;
}

.sqc-app .sqc-header__version {
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.2);
    padding: 3px 10px;
    border-radius: 20px;
    white-space: nowrap;
    direction: ltr;
    color: #fff;
}

/* ========================================================================
   Layout Grid
   ======================================================================== */
.sqc-app .sqc-layout {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--sqc-space-lg);
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: var(--sqc-space-lg);
    align-items: start;
}

@media (max-width: 768px) {
    .sqc-app .sqc-layout {
        grid-template-columns: 1fr;
        padding: var(--sqc-space-md);
    }
}

/* ========================================================================
   Input Panel — sticky on desktop
   ======================================================================== */
.sqc-app .sqc-panel--input {
    position: sticky;
    top: 24px;
}

@media (max-width: 768px) {
    .sqc-app .sqc-panel--input {
        position: static;
    }
}

/* ========================================================================
   Cards
   ======================================================================== */
.sqc-app .sqc-card {
    background: var(--sqc-surface);
    border-radius: var(--sqc-radius-lg);
    box-shadow: var(--sqc-shadow);
    border: 1px solid var(--sqc-border);
    overflow: hidden;
}

.sqc-app .sqc-card__header {
    display: flex;
    align-items: center;
    gap: var(--sqc-space-sm);
    padding: var(--sqc-space-md) var(--sqc-space-lg);
    border-bottom: 1px solid var(--sqc-gray-100);
    background: var(--sqc-gray-50);
}

.sqc-app .sqc-card__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--sqc-primary);
}

.sqc-app .sqc-card__title {
    font-size: 0.95rem;
    font-weight: 650;
    color: var(--sqc-gray-800);
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    letter-spacing: normal;
    text-transform: none;
    line-height: 1.4;
}

.sqc-app .sqc-card__body {
    padding: var(--sqc-space-lg);
}

/* Results panel spacing */
.sqc-app .sqc-panel--results > .sqc-card + .sqc-card,
.sqc-app .sqc-panel--results > .sqc-alert + .sqc-card {
    margin-top: var(--sqc-space-md);
}

/* ========================================================================
   Form Elements
   ======================================================================== */
.sqc-app .sqc-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--sqc-gray-700);
    margin-bottom: var(--sqc-space-sm);
    letter-spacing: normal;
    text-transform: none;
}

.sqc-app .sqc-textarea {
    width: 100%;
    min-height: 200px;
    padding: var(--sqc-space-md);
    font-family: var(--sqc-font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--sqc-gray-800);
    background: var(--sqc-gray-50);
    border: 2px solid var(--sqc-gray-200);
    border-radius: var(--sqc-radius);
    resize: vertical;
    transition: border-color var(--sqc-transition), box-shadow var(--sqc-transition);
    direction: ltr;
    text-align: left;
    -webkit-appearance: none;
    appearance: none;
    letter-spacing: normal;
    word-spacing: normal;
}

.sqc-app .sqc-textarea:focus {
    outline: none;
    border-color: var(--sqc-border-focus);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    background: #fff;
}

.sqc-app .sqc-textarea::placeholder {
    color: var(--sqc-gray-400);
    opacity: 1;
}

.sqc-app .sqc-input-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: var(--sqc-space-sm);
    font-size: 0.8rem;
    color: var(--sqc-gray-500);
}

.sqc-app .sqc-input-hint svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* ========================================================================
   Buttons
   ======================================================================== */
.sqc-app .sqc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sqc-space-sm);
    padding: 12px 20px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1;
    border: 2px solid transparent;
    border-radius: var(--sqc-radius);
    cursor: pointer;
    transition: all var(--sqc-transition);
    white-space: nowrap;
    min-height: 44px;
    -webkit-appearance: none;
    appearance: none;
    text-decoration: none;
    text-transform: none;
    letter-spacing: normal;
    word-spacing: normal;
    box-shadow: none;
    outline: none;
}

.sqc-app .sqc-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Primary */
.sqc-app .sqc-btn--primary {
    background: var(--sqc-primary);
    color: #fff;
    border-color: var(--sqc-primary);
    width: 100%;
}

.sqc-app .sqc-btn--primary:hover {
    background: var(--sqc-primary-hover);
    border-color: var(--sqc-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.sqc-app .sqc-btn--primary:active {
    transform: translateY(0);
}

.sqc-app .sqc-btn--primary svg {
    width: 18px;
    height: 18px;
}

/* Ghost */
.sqc-app .sqc-btn--ghost {
    background: transparent;
    color: var(--sqc-gray-600);
    border-color: transparent;
    width: 100%;
}

.sqc-app .sqc-btn--ghost:hover {
    background: var(--sqc-gray-100);
    color: var(--sqc-danger);
}

/* Link */
.sqc-app .sqc-btn--link {
    background: transparent;
    color: var(--sqc-primary);
    border-color: transparent;
    padding: 8px 4px;
    font-size: 0.8rem;
    min-height: auto;
}

.sqc-app .sqc-btn--link:hover {
    color: var(--sqc-primary-hover);
    text-decoration: underline;
}

.sqc-app .sqc-btn--link svg {
    width: 14px;
    height: 14px;
}

/* Secondary */
.sqc-app .sqc-btn--secondary {
    background: var(--sqc-primary);
    color: #fff;
    border-color: var(--sqc-primary);
}

.sqc-app .sqc-btn--secondary:hover {
    background: var(--sqc-primary-hover);
    border-color: var(--sqc-primary-hover);
}

/* Outline */
.sqc-app .sqc-btn--outline {
    background: var(--sqc-surface);
    color: var(--sqc-gray-700);
    border-color: var(--sqc-gray-300);
}

.sqc-app .sqc-btn--outline:hover {
    background: var(--sqc-gray-50);
    border-color: var(--sqc-gray-400);
}

/* Actions group */
.sqc-app .sqc-actions-input {
    display: flex;
    flex-direction: column;
    gap: var(--sqc-space-sm);
    margin-top: var(--sqc-space-md);
}

/* ========================================================================
   Loading State
   ======================================================================== */
.sqc-app .sqc-btn__spinner {
    display: none;
    align-items: center;
    gap: var(--sqc-space-sm);
    color: #fff;
}

.sqc-app .sqc-btn--loading .sqc-btn__text {
    display: none;
}

.sqc-app .sqc-btn--loading .sqc-btn__spinner {
    display: inline-flex;
}

.sqc-app .sqc-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: sqc-spin 0.7s linear infinite;
}

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

/* ========================================================================
   Chart Container
   ======================================================================== */
.sqc-app .sqc-chart-container {
    position: relative;
    width: 100%;
    min-height: 300px;
    max-height: 500px;
    background: #fff;
    border-radius: var(--sqc-radius);
    padding: var(--sqc-space-sm);
    direction: ltr;
}

/* ========================================================================
   Export Actions
   ======================================================================== */
.sqc-app .sqc-export-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sqc-space-sm);
    margin-top: var(--sqc-space-lg);
    padding-top: var(--sqc-space-lg);
    border-top: 1px solid var(--sqc-gray-100);
}

/* ========================================================================
   Stats Grid
   ======================================================================== */
.sqc-app .sqc-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--sqc-space-md);
}

.sqc-app .sqc-stat-item {
    background: var(--sqc-gray-50);
    border-radius: var(--sqc-radius);
    padding: var(--sqc-space-md);
    text-align: center;
    border: 1px solid var(--sqc-gray-100);
    transition: transform var(--sqc-transition), box-shadow var(--sqc-transition);
}

.sqc-app .sqc-stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--sqc-shadow-md);
}

.sqc-app .sqc-stat-item__label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--sqc-gray-500);
    margin-bottom: var(--sqc-space-xs);
}

.sqc-app .sqc-stat-item__value {
    font-size: 1.15rem;
    font-weight: 700;
    font-family: var(--sqc-font-mono);
    color: var(--sqc-gray-900);
    direction: ltr;
}

/* Color-coded borders using logical properties for RTL */
.sqc-app .sqc-stat-item--mean  { border-inline-start: 4px solid var(--sqc-success); }
.sqc-app .sqc-stat-item--ucl,
.sqc-app .sqc-stat-item--lcl   { border-inline-start: 4px solid var(--sqc-danger); }
.sqc-app .sqc-stat-item--uwl,
.sqc-app .sqc-stat-item--lwl   { border-inline-start: 4px solid var(--sqc-warning); }
.sqc-app .sqc-stat-item--count,
.sqc-app .sqc-stat-item--sd    { border-inline-start: 4px solid var(--sqc-info); }

/* ========================================================================
   Data Table
   ======================================================================== */
.sqc-app .sqc-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--sqc-radius);
    border: 1px solid var(--sqc-border);
    max-height: 400px;
    overflow-y: auto;
}

.sqc-app .sqc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    min-width: 320px;
}

.sqc-app .sqc-table th {
    background: var(--sqc-gray-50);
    color: var(--sqc-gray-600);
    font-weight: 650;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 16px;
    text-align: start;
    border-bottom: 2px solid var(--sqc-border);
    position: sticky;
    top: 0;
    z-index: 1;
    white-space: nowrap;
}

.sqc-app .sqc-table td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--sqc-gray-100);
    font-family: var(--sqc-font-mono);
    font-size: 0.85rem;
    color: var(--sqc-gray-700);
    text-align: start;
    background: #fff;
}

.sqc-app .sqc-table tbody tr:hover td {
    background: var(--sqc-gray-50);
}

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

/* ========================================================================
   Badges
   ======================================================================== */
.sqc-app .sqc-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: inherit;
    white-space: nowrap;
}

.sqc-app .sqc-badge--ok      { background: var(--sqc-success-light); color: var(--sqc-success); }
.sqc-app .sqc-badge--warning  { background: var(--sqc-warning-light); color: var(--sqc-warning); }
.sqc-app .sqc-badge--danger   { background: var(--sqc-danger-light);  color: var(--sqc-danger); }

/* ========================================================================
   Alerts
   ======================================================================== */
.sqc-app .sqc-alert {
    padding: var(--sqc-space-md) var(--sqc-space-lg);
    border-radius: var(--sqc-radius);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--sqc-space-sm);
    margin-bottom: var(--sqc-space-md);
}

.sqc-app .sqc-alert--error {
    background: var(--sqc-danger-light);
    color: var(--sqc-danger);
    border: 1px solid #fecaca;
}

.sqc-app .sqc-alert--warning {
    background: var(--sqc-warning-light);
    color: var(--sqc-warning);
    border: 1px solid #fde68a;
}

/* ========================================================================
   Empty State
   ======================================================================== */
.sqc-app .sqc-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--sqc-space-2xl) var(--sqc-space-lg);
    color: var(--sqc-gray-400);
    min-height: 350px;
}

.sqc-app .sqc-empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--sqc-space-md);
    opacity: 0.4;
}

.sqc-app .sqc-empty-state h3 {
    font-size: 1.15rem;
    font-weight: 650;
    color: var(--sqc-gray-500);
    margin: 0 0 var(--sqc-space-sm);
    border: none;
    background: transparent;
    letter-spacing: normal;
    text-transform: none;
}

.sqc-app .sqc-empty-state p {
    font-size: 0.9rem;
    max-width: 400px;
    line-height: 1.6;
    color: var(--sqc-gray-400);
    margin: 0;
}

/* ========================================================================
   Footer
   ======================================================================== */
.sqc-app .sqc-footer {
    text-align: center;
    padding: var(--sqc-space-lg) var(--sqc-space-md);
    font-size: 0.8rem;
    color: var(--sqc-gray-400);
    border-top: 1px solid var(--sqc-border);
    margin-top: var(--sqc-space-lg);
}

.sqc-app .sqc-footer p {
    color: var(--sqc-gray-400);
    font-size: 0.8rem;
    margin: 0;
}

/* ========================================================================
   Toast Notifications
   ======================================================================== */
.sqc-toast {
    position: fixed;
    top: 20px;
    z-index: 99999;
    padding: 14px 22px;
    border-radius: var(--sqc-radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: #fff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    max-width: 400px;
    pointer-events: none;
}

/* LTR: toast on right */
.sqc-toast {
    right: 20px;
}

/* RTL: toast on left */
[dir="rtl"] .sqc-toast,
.sqc-app[dir="rtl"] ~ .sqc-toast {
    right: auto;
    left: 20px;
}

.sqc-toast--visible {
    opacity: 1;
    transform: translateY(0);
}

.sqc-toast--success { background: var(--sqc-success); }
.sqc-toast--error   { background: var(--sqc-danger); }
.sqc-toast--info    { background: var(--sqc-info); }

/* ========================================================================
   Animations
   ======================================================================== */
@keyframes sqc-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sqc-app .sqc-card--chart,
.sqc-app .sqc-card--stats,
.sqc-app .sqc-card--table {
    animation: sqc-fadeInUp 0.4s ease-out;
}

/* ========================================================================
   SVG fallback sizing — prevents oversized SVGs
   ======================================================================== */
.sqc-app svg:not(.sqc-header__icon):not(.sqc-empty-state svg) {
    max-width: 100%;
}

/* ========================================================================
   Mobile Responsive Adjustments
   ======================================================================== */
@media (max-width: 768px) {
    .sqc-app .sqc-header {
        padding: var(--sqc-space-md) var(--sqc-space-md);
    }

    .sqc-app .sqc-header__title {
        font-size: 1.1rem;
    }

    .sqc-app .sqc-card__body {
        padding: var(--sqc-space-md);
    }

    .sqc-app .sqc-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--sqc-space-sm);
    }

    .sqc-app .sqc-stat-item {
        padding: 12px;
    }

    .sqc-app .sqc-stat-item__label {
        font-size: 0.65rem;
    }

    .sqc-app .sqc-stat-item__value {
        font-size: 1rem;
    }

    .sqc-app .sqc-export-actions {
        flex-direction: column;
    }

    .sqc-app .sqc-export-actions .sqc-btn {
        width: 100%;
    }

    .sqc-app .sqc-chart-container {
        min-height: 250px;
    }
}

@media (max-width: 480px) {
    .sqc-app .sqc-stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ========================================================================
   Print Styles
   ======================================================================== */
@media print {
    .sqc-app .sqc-header {
        position: static;
    }

    .sqc-app .sqc-panel--input {
        position: static;
    }

    .sqc-app .sqc-export-actions {
        display: none;
    }

    .sqc-app .sqc-btn--ghost,
    .sqc-app .sqc-btn--link {
        display: none;
    }
}