/**
 * Standalone LMS Public Frontend Stylesheet
 *
 * Scoped, autonomous design system decoupled from parent WordPress themes.
 * Powered by dynamic CSS custom properties generated from CustomisationService.
 *
 * @package StandaloneLMS
 */

/* ==========================================================================
   1. ROOT DEFAULTS (FALLBACKS BEFORE DYNAMIC INLINE INJECTION)
   ========================================================================== */
:root {
    --lms-primary: #2563eb;
    --lms-primary-hover: #1d4ed8;
    --lms-secondary: #475569;
    --lms-secondary-hover: #334155;
    --lms-accent: #0ea5e9;
    --lms-background: #f8fafc;
    --lms-surface: #ffffff;
    --lms-text: #0f172a;
    --lms-muted-text: #64748b;
    --lms-border: #e2e8f0;
    --lms-success: #16a34a;
    --lms-warning: #d97706;
    --lms-danger: #dc2626;
    --lms-error: #dc2626;
    --lms-info: #2563eb;

    --lms-spacing: 16px;
    --lms-space-xxs: 4px;
    --lms-space-xs: 8px;
    --lms-space-sm: 12px;
    --lms-space-md: 16px;
    --lms-space-lg: 24px;
    --lms-space-xl: 32px;
    --lms-space-xxl: 48px;

    --lms-radius: 8px;
    --lms-radius-none: 0px;
    --lms-radius-sm: 4px;
    --lms-radius-md: 8px;
    --lms-radius-lg: 12px;
    --lms-radius-pill: 9999px;
    --lms-button-radius: 6px;

    --lms-shadow-none: none;
    --lms-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --lms-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --lms-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    --lms-container-max-width: 1200px;
    --lms-page-padding: 24px;
    --lms-section-padding: 32px;
    --lms-column-gap: 24px;
    --lms-card-gap: 20px;
    --lms-element-gap: 16px;

    --lms-font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --lms-font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --lms-size-body: 16px;
    --lms-weight-body: 400;
    --lms-line-body: 1.6;
    --lms-size-h1: 36px;
    --lms-weight-h1: 700;
    --lms-size-h2: 28px;
    --lms-weight-h2: 700;
    --lms-size-h3: 22px;
    --lms-weight-h3: 600;
    --lms-size-h4: 18px;
    --lms-weight-h4: 600;
    --lms-size-course-title: 20px;
    --lms-weight-course-title: 600;

    --lms-btn-primary-bg: #2563eb;
    --lms-btn-primary-text: #ffffff;
    --lms-btn-primary-border: #2563eb;
    --lms-btn-primary-border-width: 1px;
    --lms-btn-primary-radius: 6px;
    --lms-btn-primary-py: 10px;
    --lms-btn-primary-px: 20px;
    --lms-btn-primary-weight: 600;
    --lms-btn-primary-hover-bg: #1d4ed8;
    --lms-btn-primary-hover-text: #ffffff;
    --lms-btn-primary-hover-border: #1d4ed8;

    --lms-btn-secondary-bg: #f1f5f9;
    --lms-btn-secondary-text: #334155;
    --lms-btn-secondary-border: #cbd5e1;
    --lms-btn-secondary-border-width: 1px;
    --lms-btn-secondary-radius: 6px;
    --lms-btn-secondary-py: 10px;
    --lms-btn-secondary-px: 20px;
    --lms-btn-secondary-weight: 600;
    --lms-btn-secondary-hover-bg: #e2e8f0;
    --lms-btn-secondary-hover-text: #0f172a;
    --lms-btn-secondary-hover-border: #94a3b8;
}

/* ==========================================================================
   2. ISOLATED CONTAINER & LAYOUT SYSTEM
   ========================================================================== */
.standalone-lms-container,
.standalone-lms-wrap {
    max-width: var(--lms-container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding: var(--lms-page-padding) 16px;
    box-sizing: border-box;
    font-family: var(--lms-font-body);
    color: var(--lms-text);
    background-color: transparent;
    line-height: var(--lms-line-body);
}

.standalone-lms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--lms-card-gap);
    margin-top: var(--lms-section-padding);
}

.standalone-lms-flex {
    display: flex;
    align-items: center;
    gap: var(--lms-element-gap);
}

.standalone-lms-flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--lms-element-gap);
}

/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */
.standalone-lms-container h1,
.standalone-lms-h1 {
    font-family: var(--lms-font-heading);
    font-size: var(--lms-size-h1);
    font-weight: var(--lms-weight-h1);
    line-height: var(--lms-line-h1, 1.25);
    letter-spacing: var(--lms-spacing-h1, -0.02em);
    text-transform: var(--lms-transform-h1, none);
    color: var(--lms-text);
    margin: 0 0 16px 0;
}

.standalone-lms-container h2,
.standalone-lms-h2 {
    font-family: var(--lms-font-heading);
    font-size: var(--lms-size-h2);
    font-weight: var(--lms-weight-h2);
    line-height: var(--lms-line-h2, 1.3);
    letter-spacing: var(--lms-spacing-h2, -0.01em);
    text-transform: var(--lms-transform-h2, none);
    color: var(--lms-text);
    margin: 0 0 14px 0;
}

.standalone-lms-container h3,
.standalone-lms-h3 {
    font-family: var(--lms-font-heading);
    font-size: var(--lms-size-h3);
    font-weight: var(--lms-weight-h3);
    line-height: var(--lms-line-h3, 1.35);
    color: var(--lms-text);
    margin: 0 0 12px 0;
}

.standalone-lms-container h4,
.standalone-lms-h4 {
    font-family: var(--lms-font-heading);
    font-size: var(--lms-size-h4);
    font-weight: var(--lms-weight-h4);
    line-height: var(--lms-line-h4, 1.4);
    color: var(--lms-text);
    margin: 0 0 10px 0;
}

.standalone-lms-course-title {
    font-family: var(--lms-font-heading);
    font-size: var(--lms-size-course-title);
    font-weight: var(--lms-weight-course-title);
    color: var(--lms-text);
    line-height: 1.3;
    margin: 0 0 8px 0;
}

.standalone-lms-muted {
    color: var(--lms-muted-text);
    font-size: 14px;
}

/* ==========================================================================
   4. BUTTON SYSTEM & PRESETS (Section 15 & 16)
   ========================================================================== */
.standalone-lms-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--lms-font-body);
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    border-style: solid;
    transition: all 0.2s ease-in-out;
    box-sizing: border-box;
    white-space: nowrap;
}

.standalone-lms-btn:focus-visible {
    outline: 2px solid var(--lms-primary);
    outline-offset: 2px;
}

.standalone-lms-btn:disabled,
.standalone-lms-btn.is-disabled {
    opacity: 0.55;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary Preset */
.standalone-lms-btn--primary {
    background-color: var(--lms-btn-primary-bg);
    color: var(--lms-btn-primary-text) !important;
    border-color: var(--lms-btn-primary-border);
    border-width: var(--lms-btn-primary-border-width);
    border-radius: var(--lms-btn-primary-radius);
    padding: var(--lms-btn-primary-py) var(--lms-btn-primary-px);
    font-weight: var(--lms-btn-primary-weight);
}

.standalone-lms-btn--primary:hover,
.standalone-lms-btn--primary:active {
    background-color: var(--lms-btn-primary-hover-bg);
    color: var(--lms-btn-primary-hover-text) !important;
    border-color: var(--lms-btn-primary-hover-border);
}

/* Secondary Preset */
.standalone-lms-btn--secondary {
    background-color: var(--lms-btn-secondary-bg);
    color: var(--lms-btn-secondary-text) !important;
    border-color: var(--lms-btn-secondary-border);
    border-width: var(--lms-btn-secondary-border-width);
    border-radius: var(--lms-btn-secondary-radius);
    padding: var(--lms-btn-secondary-py) var(--lms-btn-secondary-px);
    font-weight: var(--lms-btn-secondary-weight);
}

.standalone-lms-btn--secondary:hover,
.standalone-lms-btn--secondary:active {
    background-color: var(--lms-btn-secondary-hover-bg);
    color: var(--lms-btn-secondary-hover-text) !important;
    border-color: var(--lms-btn-secondary-hover-border);
}

/* Success Preset */
.standalone-lms-btn--success {
    background-color: var(--lms-btn-success-bg, var(--lms-success));
    color: #ffffff !important;
    border-color: var(--lms-btn-success-border, var(--lms-success));
    border-width: 1px;
    border-radius: var(--lms-button-radius);
    padding: 10px 20px;
}

.standalone-lms-btn--success:hover {
    background-color: var(--lms-btn-success-hover-bg, #15803d);
    border-color: var(--lms-btn-success-hover-bg, #15803d);
}

/* Danger Preset */
.standalone-lms-btn--danger {
    background-color: var(--lms-btn-danger-bg, var(--lms-danger));
    color: #ffffff !important;
    border-color: var(--lms-btn-danger-border, var(--lms-danger));
    border-width: 1px;
    border-radius: var(--lms-button-radius);
    padding: 10px 20px;
}

.standalone-lms-btn--danger:hover {
    background-color: var(--lms-btn-danger-hover-bg, #b91c1c);
    border-color: var(--lms-btn-danger-hover-bg, #b91c1c);
}

/* Outline Preset */
.standalone-lms-btn--outline {
    background-color: transparent;
    color: var(--lms-primary) !important;
    border-color: var(--lms-primary);
    border-width: 1px;
    border-radius: var(--lms-button-radius);
    padding: 10px 20px;
}

.standalone-lms-btn--outline:hover {
    background-color: var(--lms-btn-outline-hover-bg, #eff6ff);
    color: var(--lms-primary-hover) !important;
}

/* Text / Ghost Preset */
.standalone-lms-btn--text {
    background-color: transparent;
    color: var(--lms-primary) !important;
    border-color: transparent;
    border-width: 0;
    border-radius: 4px;
    padding: 8px 12px;
}

.standalone-lms-btn--text:hover {
    background-color: var(--lms-background);
}

/* ==========================================================================
   5. CARDS & PANELS
   ========================================================================== */
.standalone-lms-card {
    background: var(--lms-surface);
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius);
    box-shadow: var(--lms-shadow-sm);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.standalone-lms-card:hover {
    box-shadow: var(--lms-shadow-md);
}

.standalone-lms-card-header {
    padding: var(--lms-space-md) var(--lms-space-lg);
    border-bottom: 1px solid var(--lms-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.standalone-lms-card-body {
    padding: var(--lms-space-lg);
}

.standalone-lms-card-footer {
    padding: var(--lms-space-md) var(--lms-space-lg);
    border-top: 1px solid var(--lms-border);
    background: var(--lms-background);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==========================================================================
   6. STATUS BADGES & PILLS
   ========================================================================== */
.standalone-lms-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--lms-radius-pill);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
}

.standalone-lms-badge--success {
    background-color: #dcfce7;
    color: #166534;
}

.standalone-lms-badge--warning {
    background-color: #fef3c7;
    color: #92400e;
}

.standalone-lms-badge--danger,
.standalone-lms-badge--error {
    background-color: #fee2e2;
    color: #991b1b;
}

.standalone-lms-badge--info {
    background-color: #e0f2fe;
    color: #075985;
}

.standalone-lms-badge--neutral {
    background-color: #f1f5f9;
    color: #475569;
}

/* ==========================================================================
   7. NOTICES & ALERTS
   ========================================================================== */
.standalone-lms-notice {
    padding: 16px 20px;
    border-radius: var(--lms-radius);
    margin-bottom: var(--lms-space-md);
    border-left: 4px solid transparent;
    font-size: 14px;
    line-height: 1.5;
    box-sizing: border-box;
}

.standalone-lms-notice--success {
    background-color: #f0fdf4;
    border-left-color: var(--lms-success);
    color: #166534;
}

.standalone-lms-notice--warning {
    background-color: #fffbeb;
    border-left-color: var(--lms-warning);
    color: #92400e;
}

.standalone-lms-notice--error {
    background-color: #fef2f2;
    border-left-color: var(--lms-danger);
    color: #991b1b;
}

.standalone-lms-notice--info {
    background-color: #f0f9ff;
    border-left-color: var(--lms-info);
    color: #0369a1;
}

/* ==========================================================================
   8. PROGRESS BARS
   ========================================================================== */
.standalone-lms-progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: var(--lms-radius-pill);
    overflow: hidden;
    margin: 8px 0;
}

.standalone-lms-progress-fill {
    height: 100%;
    background-color: var(--lms-primary);
    border-radius: var(--lms-radius-pill);
    transition: width 0.4s ease;
}

/* ==========================================================================
   9. FORMS & INPUTS
   ========================================================================== */
.standalone-lms-form-group {
    margin-bottom: 18px;
}

.standalone-lms-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--lms-text);
    margin-bottom: 6px;
}

.standalone-lms-input,
.standalone-lms-select,
.standalone-lms-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius-sm);
    background-color: var(--lms-surface);
    color: var(--lms-text);
    font-family: inherit;
    font-size: 14px;
    box-sizing: border-box;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.standalone-lms-input:focus,
.standalone-lms-select:focus,
.standalone-lms-textarea:focus {
    outline: none;
    border-color: var(--lms-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ==========================================================================
   10. TABLES
   ========================================================================== */
.standalone-lms-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--lms-border);
    border-radius: var(--lms-radius);
    background: var(--lms-surface);
}

.standalone-lms-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.standalone-lms-table th {
    padding: 12px 16px;
    background-color: var(--lms-background);
    color: var(--lms-muted-text);
    font-weight: 600;
    border-bottom: 1px solid var(--lms-border);
}

.standalone-lms-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--lms-border);
    color: var(--lms-text);
}

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

.standalone-lms-table tr:hover td {
    background-color: rgba(0, 0, 0, 0.015);
}