/**
 * WP Course Showcase - Modal Styles
 * 
 * Glassmorphism design + Apple HIG (Bottom Sheet on mobile)
 * Mobile-first responsive design
 * 
 * @package WP_Course_Showcase
 * @since 1.1.0
 */

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

.wpcs-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--wpcs-z-modal, 100);
    display: flex;
    align-items: flex-end; /* Bottom sheet on mobile */
    justify-content: center;
    background: rgba(44, 44, 44, 0);
    visibility: hidden;
    opacity: 0;
    transition: background 0.25s ease-out,
                visibility 0s 0.25s,
                opacity 0.25s ease-out;
    /* GPU acceleration */
    will-change: opacity;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.wpcs-modal-overlay--active {
    background: rgba(44, 44, 44, 0.5);
    visibility: visible;
    opacity: 1;
    transition: background 0.25s ease-out,
                visibility 0s 0s,
                opacity 0.25s ease-out;
}

/* Body scroll lock */
body.wpcs-modal-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* ==========================================================================
   Modal Container
   ========================================================================== */

.wpcs-modal {
    position: relative;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    
    /* Glassmorphism - static blur for performance */
    background: rgba(255, 255, 255, 0.98);
    
    /* Border & Shadow */
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25),
                0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    
    /* Border radius - rounded top on mobile (bottom sheet) */
    border-radius: 24px 24px 0 0;
    
    /* Animation - GPU accelerated */
    transform: translate3d(0, 100%, 0);
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    will-change: transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.wpcs-modal--active {
    transform: translate3d(0, 0, 0);
}

/* Desktop: Center modal */
@media (min-width: 640px) {
    .wpcs-modal-overlay {
        align-items: center;
        padding: var(--wpcs-space-6);
    }
    
    .wpcs-modal {
        border-radius: var(--wpcs-radius-xl, 24px);
        max-height: 85vh;
        transform: translate3d(0, 20px, 0);
        opacity: 0;
        transition: transform 0.25s cubic-bezier(0.32, 0.72, 0, 1),
                    opacity 0.2s ease-out;
    }
    
    .wpcs-modal--active {
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }
}

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

.wpcs-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--wpcs-space-5) var(--wpcs-space-6);
    border-bottom: 1px solid var(--wpcs-color-border, #E8E6E3);
    flex-shrink: 0;
}

.wpcs-modal__title {
    font-family: var(--wpcs-font-sans, 'Lato', sans-serif);
    font-size: var(--wpcs-font-size-lg, 1.125rem);
    font-weight: 700;
    color: var(--wpcs-color-text-main, #2C2C2C);
    margin: 0;
    line-height: 1.3;
}

.wpcs-modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    margin: -8px -8px -8px 8px;
    border: none;
    background: transparent;
    color: var(--wpcs-color-text-secondary, #6B6B6B);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.wpcs-modal__close:hover,
.wpcs-modal__close:focus {
    background: rgba(0, 0, 0, 0.05);
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-modal__close svg {
    width: 20px;
    height: 20px;
}

/* ==========================================================================
   Modal Body
   ========================================================================== */

.wpcs-modal__body {
    flex: 1;
    overflow-y: auto;
    padding: var(--wpcs-space-6);
    -webkit-overflow-scrolling: touch;
}

/* Custom scrollbar */
.wpcs-modal__body::-webkit-scrollbar {
    width: 6px;
}

.wpcs-modal__body::-webkit-scrollbar-track {
    background: transparent;
}

.wpcs-modal__body::-webkit-scrollbar-thumb {
    background: var(--wpcs-color-border-medium, #D4D2CF);
    border-radius: 3px;
}

/* ==========================================================================
   Modal Footer
   ========================================================================== */

.wpcs-modal__footer {
    padding: var(--wpcs-space-4) var(--wpcs-space-6);
    border-top: 1px solid var(--wpcs-color-border, #E8E6E3);
    flex-shrink: 0;
}

.wpcs-modal__footer:empty {
    display: none;
}

/* ==========================================================================
   Form Styles
   ========================================================================== */

.wpcs-form__intro {
    margin: 0 0 var(--wpcs-space-6);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    line-height: 1.6;
}

.wpcs-form__row {
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-form__row--half {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--wpcs-space-4);
}

@media (min-width: 480px) {
    .wpcs-form__row--half {
        grid-template-columns: 1fr 1fr;
    }
}

.wpcs-form__field {
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-form__label {
    display: block;
    margin-bottom: var(--wpcs-space-2);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    font-weight: 600;
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-form__label .required {
    color: var(--wpcs-color-error, #B4726F);
}

.wpcs-form__input {
    width: 100%;
    padding: var(--wpcs-space-3) var(--wpcs-space-4);
    font-family: inherit;
    font-size: 16px; /* Prevent zoom on iOS */
    line-height: 1.5;
    color: var(--wpcs-color-text-main, #2C2C2C);
    background: var(--wpcs-color-paper, #FFFFFF);
    border: 1px solid var(--wpcs-color-border, #E8E6E3);
    border-radius: var(--wpcs-radius-md, 12px);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-height: 48px; /* Touch target */
}

.wpcs-form__input:focus {
    outline: none;
    border-color: var(--wpcs-color-primary, #AE8581);
    box-shadow: 0 0 0 3px rgba(174, 133, 129, 0.15);
}

.wpcs-form__input--error {
    border-color: var(--wpcs-color-error, #B4726F);
}

.wpcs-form__input--error:focus {
    box-shadow: 0 0 0 3px rgba(180, 114, 111, 0.15);
}

.wpcs-form__error {
    display: block;
    margin-top: var(--wpcs-space-2);
    font-size: var(--wpcs-font-size-xs, 0.75rem);
    color: var(--wpcs-color-error, #B4726F);
}

/* Checkbox styling */
.wpcs-form__field--checkbox {
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-form__checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--wpcs-space-3);
    cursor: pointer;
}

.wpcs-form__checkbox {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--wpcs-color-primary, #AE8581);
    cursor: pointer;
}

.wpcs-form__checkbox-text {
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
    line-height: 1.5;
}

.wpcs-form__checkbox-text a {
    color: var(--wpcs-color-primary, #AE8581);
    text-decoration: underline;
}

/* File upload styling */
.wpcs-form__upload-area {
    position: relative;
    padding: var(--wpcs-space-6);
    border: 2px dashed var(--wpcs-color-border, #E8E6E3);
    border-radius: var(--wpcs-radius-md, 12px);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.wpcs-form__upload-area:hover {
    border-color: var(--wpcs-color-primary, #AE8581);
    background: rgba(174, 133, 129, 0.04);
}

.wpcs-form__file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.wpcs-form__upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--wpcs-space-2);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
}

.wpcs-form__upload-label svg {
    color: var(--wpcs-color-primary, #AE8581);
}

.wpcs-form__upload-label small {
    font-size: var(--wpcs-font-size-xs, 0.75rem);
    color: var(--wpcs-color-text-muted, #9A9A9A);
}

.wpcs-form__upload-preview {
    margin-top: var(--wpcs-space-3);
}

.wpcs-form__file-name {
    display: inline-flex;
    align-items: center;
    gap: var(--wpcs-space-2);
    padding: var(--wpcs-space-2) var(--wpcs-space-3);
    background: var(--wpcs-color-bg-subtle, #F5F3F0);
    border-radius: var(--wpcs-radius-sm, 8px);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
}

.wpcs-form__file-remove {
    padding: 2px 6px;
    margin-left: var(--wpcs-space-2);
    border: none;
    background: transparent;
    color: var(--wpcs-color-error, #B4726F);
    font-size: 18px;
    cursor: pointer;
}

/* Form actions */
.wpcs-form__actions {
    margin-top: var(--wpcs-space-6);
}

.wpcs-form__submit {
    width: 100%;
}

/* Form message */
.wpcs-form__message {
    margin-top: var(--wpcs-space-4);
    padding: var(--wpcs-space-3) var(--wpcs-space-4);
    border-radius: var(--wpcs-radius-md, 12px);
}

.wpcs-form__message--error {
    background: var(--wpcs-color-error-bg, #F6E9E9);
    color: var(--wpcs-color-error, #B4726F);
}

.wpcs-form__message--success {
    background: var(--wpcs-color-success-bg, #EAF2ED);
    color: var(--wpcs-color-success, #7C9885);
}

/* Promo box (Kompass) */
.wpcs-form__promo {
    display: flex;
    gap: var(--wpcs-space-4);
    padding: var(--wpcs-space-4);
    margin-bottom: var(--wpcs-space-6);
    background: linear-gradient(135deg, rgba(174, 133, 129, 0.08) 0%, rgba(201, 165, 154, 0.04) 100%);
    border: 1px solid rgba(174, 133, 129, 0.2);
    border-radius: var(--wpcs-radius-md, 12px);
}

.wpcs-form__promo-icon {
    flex-shrink: 0;
    color: var(--wpcs-color-primary, #AE8581);
}

.wpcs-form__promo-text strong {
    display: block;
    margin-bottom: var(--wpcs-space-1);
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-form__promo-text p {
    margin: 0;
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
    line-height: 1.5;
}

/* ==========================================================================
   Button Styles
   ========================================================================== */

.wpcs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--wpcs-space-2);
    padding: var(--wpcs-space-3) var(--wpcs-space-6);
    min-height: 48px; /* Touch target */
    font-family: inherit;
    font-size: var(--wpcs-font-size-base, 1rem);
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    border: none;
    border-radius: var(--wpcs-radius-pill, 999px);
    cursor: pointer;
    transition: all 0.2s ease;
}

.wpcs-btn--primary {
    background: var(--wpcs-color-primary, #AE8581);
    color: var(--wpcs-color-text-on-primary, #FFFFFF);
    box-shadow: var(--wpcs-shadow-cta, 0 6px 20px rgba(174, 133, 129, 0.22));
}

.wpcs-btn--primary:hover,
.wpcs-btn--primary:focus {
    background: var(--wpcs-color-primary-hover, #9A7470);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(174, 133, 129, 0.3);
}

.wpcs-btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.wpcs-btn--secondary {
    background: transparent;
    color: var(--wpcs-color-primary, #AE8581);
    border: 1px solid var(--wpcs-color-primary, #AE8581);
}

.wpcs-btn--secondary:hover,
.wpcs-btn--secondary:focus {
    background: rgba(174, 133, 129, 0.08);
}

/* Loading spinner */
.wpcs-btn__loading {
    display: inline-flex;
    align-items: center;
}

.wpcs-spinner {
    width: 20px;
    height: 20px;
    animation: wpcs-spin 1s linear infinite;
}

@keyframes wpcs-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   Bundle Styles
   ========================================================================== */

.wpcs-bundle__options {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--wpcs-space-4);
}

@media (min-width: 560px) {
    .wpcs-bundle__options {
        grid-template-columns: 1fr 1fr;
    }
}

.wpcs-bundle__option {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--wpcs-space-5);
    background: var(--wpcs-color-paper, #FFFFFF);
    border: 1px solid var(--wpcs-color-border, #E8E6E3);
    border-radius: var(--wpcs-radius-lg, 16px);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.wpcs-bundle__option:hover {
    border-color: var(--wpcs-color-primary-light, #E8D9D5);
}

.wpcs-bundle__option--featured {
    border-color: var(--wpcs-color-primary, #AE8581);
    box-shadow: 0 0 0 1px var(--wpcs-color-primary, #AE8581);
}

.wpcs-bundle__badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--wpcs-space-1) var(--wpcs-space-3);
    background: var(--wpcs-color-primary, #AE8581);
    color: var(--wpcs-color-text-on-primary, #FFFFFF);
    font-size: var(--wpcs-font-size-xs, 0.75rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--wpcs-radius-pill, 999px);
}

.wpcs-bundle__option-header {
    margin-bottom: var(--wpcs-space-4);
    text-align: center;
}

.wpcs-bundle__option-title {
    margin: 0 0 var(--wpcs-space-2);
    font-size: var(--wpcs-font-size-lg, 1.125rem);
    font-weight: 700;
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-bundle__benefit {
    display: inline-block;
    padding: var(--wpcs-space-1) var(--wpcs-space-3);
    background: var(--wpcs-color-success-bg, #EAF2ED);
    color: var(--wpcs-color-success, #7C9885);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    font-weight: 600;
    border-radius: var(--wpcs-radius-pill, 999px);
}

.wpcs-bundle__option-image {
    margin-bottom: var(--wpcs-space-4);
    text-align: center;
}

.wpcs-bundle__thumb {
    width: 100%;
    max-width: 180px;
    height: auto;
    border-radius: var(--wpcs-radius-md, 12px);
}

.wpcs-bundle__thumb-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 180px;
    height: 120px;
    margin: 0 auto;
    background: var(--wpcs-color-bg-subtle, #F5F3F0);
    border-radius: var(--wpcs-radius-md, 12px);
    color: var(--wpcs-color-text-muted, #9A9A9A);
}

.wpcs-bundle__option-content {
    flex: 1;
    text-align: center;
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-bundle__course-title {
    margin: 0 0 var(--wpcs-space-2);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
}

.wpcs-bundle__price {
    margin: 0;
    font-size: var(--wpcs-font-size-2xl, 1.5rem);
    font-weight: 700;
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-bundle__courses-list {
    display: flex;
    flex-direction: column;
    gap: var(--wpcs-space-2);
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-bundle__course-item {
    display: flex;
    align-items: center;
    gap: var(--wpcs-space-3);
    padding: var(--wpcs-space-2);
    background: var(--wpcs-color-bg-subtle, #F5F3F0);
    border-radius: var(--wpcs-radius-sm, 8px);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
}

.wpcs-bundle__course-item svg {
    margin-left: auto;
    color: var(--wpcs-color-success, #7C9885);
}

.wpcs-bundle__mini-thumb {
    width: 32px;
    height: 32px;
    border-radius: var(--wpcs-radius-sm, 8px);
    object-fit: cover;
}

.wpcs-bundle__features {
    margin-bottom: var(--wpcs-space-4);
}

.wpcs-bundle__feature {
    display: flex;
    align-items: center;
    gap: var(--wpcs-space-2);
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
}

.wpcs-bundle__feature svg {
    color: var(--wpcs-color-success, #7C9885);
}

/* Bundle Price Block */
.wpcs-bundle__price-block {
    text-align: center;
    margin-bottom: var(--wpcs-space-4);
    padding: var(--wpcs-space-3) 0;
}

.wpcs-bundle__price--bundle {
    font-size: var(--wpcs-font-size-2xl, 1.5rem);
    font-weight: 700;
    color: var(--wpcs-color-primary, #AE8581);
}

.wpcs-bundle__savings {
    margin: var(--wpcs-space-1) 0 0;
    font-size: var(--wpcs-font-size-sm, 0.875rem);
    font-weight: 600;
    color: var(--wpcs-color-success, #7C9885);
}

.wpcs-bundle__option-action {
    margin-top: auto;
}

.wpcs-bundle__option-action .wpcs-btn {
    width: 100%;
}

/* Bright primary styling for single course button (REQ-018) */
.wpcs-bundle__btn-single {
    background: linear-gradient(135deg, #e5d8d6 0%, #d8c3bf 100%) !important;
    color: #ffffff !important;
    border: none !important;
    box-shadow: 0 8px 18px rgba(216, 195, 191, 0.3);
    font-weight: 700;
    min-height: 52px;
}

.wpcs-bundle__btn-single:hover,
.wpcs-bundle__btn-single:focus {
    background: linear-gradient(135deg, #d2bdb9 0%, #c6aaa6 100%) !important;
    box-shadow: 0 10px 22px rgba(198, 170, 166, 0.34);
    transform: translateY(-1px);
    color: #ffffff !important;
    text-decoration: none;
}

.wpcs-bundle__btn-single:focus {
    outline: 2px solid rgba(198, 170, 166, 0.45);
    outline-offset: 2px;
}

/* ==========================================================================
   Success State
   ========================================================================== */

.wpcs-success {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--wpcs-space-6) 0;
}

.wpcs-success__icon {
    margin-bottom: var(--wpcs-space-4);
    color: var(--wpcs-color-success, #7C9885);
}

.wpcs-success__icon svg {
    width: 64px;
    height: 64px;
}

.wpcs-success__title {
    margin: 0 0 var(--wpcs-space-3);
    font-size: var(--wpcs-font-size-xl, 1.25rem);
    font-weight: 700;
    color: var(--wpcs-color-text-main, #2C2C2C);
}

.wpcs-success__message {
    margin: 0 0 var(--wpcs-space-6);
    color: var(--wpcs-color-text-secondary, #6B6B6B);
    line-height: 1.6;
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .wpcs-modal-overlay,
    .wpcs-modal,
    .wpcs-btn,
    .wpcs-form__input {
        transition: none;
    }
    
    .wpcs-spinner {
        animation: none;
    }
}