/* ============================================
   VTG Course Registration - Premium Modern Design
   Clean, Minimalist, Professional
   ============================================ */

/* Modern Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* CSS Variables */
:root {
    --vtg-primary: #000000;
    --vtg-accent: #d4f5d4;
    --vtg-accent-dark: #b8e6b8;
    --vtg-white: #ffffff;
    --vtg-bg: #fafafa;
    --vtg-gray: #f5f5f5;
    --vtg-text: #1a1a1a;
    --vtg-text-light: #6b6b6b;
    --vtg-text-lighter: #9b9b9b;
    --vtg-border: #e5e5e5;
    --vtg-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --vtg-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --vtg-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.15);
    --vtg-radius: 20px;
    --vtg-radius-sm: 12px;
    --vtg-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
.vtg-courses-container *,
.vtg-registration-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    background: var(--vtg-bg);
    color: var(--vtg-text);
}

/* ============================================
   COURSES DISPLAY - Premium Cards
   ============================================ */

.vtg-courses-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 32px;
}

@media (max-width: 768px) {
    .vtg-courses-container {
        padding: 40px 20px;
    }
}

.vtg-no-courses-message {
    text-align: center;
    padding: 100px 40px;
    background: var(--vtg-white);
    border-radius: var(--vtg-radius);
    color: var(--vtg-text-light);
    font-size: 1.0625rem;
    box-shadow: var(--vtg-shadow);
}

/* Course Grid */
.vtg-courses-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 28px;
}

@media (max-width: 768px) {
    .vtg-courses-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* Premium Course Card */
.vtg-course-card {
    background: var(--vtg-white);
    border-radius: var(--vtg-radius);
    padding: 40px 32px;
    transition: var(--vtg-transition);
    box-shadow: var(--vtg-shadow);
    position: relative;
    border: 1px solid var(--vtg-border);
}

.vtg-course-card:hover {
    box-shadow: var(--vtg-shadow-md);
    transform: translateY(-4px);
}

.vtg-course-card.vtg-course-featured {
    border: 2px solid var(--vtg-accent);
    box-shadow: var(--vtg-shadow-md);
}

.vtg-course-card.vtg-course-unavailable {
    opacity: 0.6;
}

.vtg-course-card.vtg-course-unavailable:hover {
    transform: none;
}

/* Badge */
.vtg-course-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--vtg-accent);
    padding: 8px 16px;
    border-radius: var(--vtg-radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--vtg-text);
    text-transform: uppercase;
}

.vtg-badge-danger {
    background: #fee;
    color: #991b1b;
}

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

/* Category */
.vtg-course-category {
    font-size: 0.8125rem;
    color: var(--vtg-text-light);
    margin-bottom: 12px;
    font-weight: 500;
}

/* Course Name */
.vtg-course-name {
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--vtg-primary);
    line-height: 1.2;
    margin: 0 0 8px 0;
}

@media (max-width: 768px) {
    .vtg-course-name {
        font-size: 1.625rem;
    }
}

/* Subtitle */
.vtg-course-subtitle {
    font-size: 0.9375rem;
    color: var(--vtg-text-lighter);
    margin-bottom: 28px;
}

/* Course Details - Bullet List with Light Background */
.vtg-course-details {
    margin: 24px 0;
    background: rgba(255, 255, 255, 0.5);
    padding: 20px;
    border-radius: 12px;
}

.vtg-detail-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 0.9375rem;
    color: var(--vtg-text);
    line-height: 1.5;
    font-weight: 500;
}

.vtg-detail-item:last-child {
    margin-bottom: 0;
}

/* Footer Info */
.vtg-course-footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--vtg-border);
}

.vtg-spots-info {
    font-size: 0.875rem;
    color: var(--vtg-text-light);
    margin-bottom: 8px;
}

.vtg-spots-info strong {
    color: var(--vtg-primary);
    font-weight: 700;
}

.vtg-deadline-info {
    font-size: 0.8125rem;
    color: var(--vtg-text-light);
    margin-bottom: 24px;
    font-weight: 500;
}

.vtg-deadline-info strong {
    color: var(--vtg-text);
}

/* Button - Black */
.vtg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--vtg-radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--vtg-transition);
    text-decoration: none;
    width: 100%;
    text-align: center;
    background: var(--vtg-primary);
    color: var(--vtg-white);
}

.vtg-btn:hover {
    background: #1a1a1a;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.vtg-btn-disabled {
    background: var(--vtg-gray) !important;
    color: var(--vtg-text-lighter) !important;
    cursor: not-allowed !important;
}

.vtg-btn-disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

.vtg-btn-outline {
    background: transparent;
    color: var(--vtg-primary);
    border: 2px solid var(--vtg-primary);
}

.vtg-btn-outline:hover {
    background: var(--vtg-primary);
    color: var(--vtg-white);
}

/* Icons - SVG Outline */
.vtg-icon {
    display: inline-block;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    opacity: 0.5;
    stroke: currentColor;
}

.vtg-icon-inline {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    vertical-align: middle;
    stroke: currentColor;
}

.vtg-course-info-box .vtg-icon {
    width: 18px;
    height: 18px;
    opacity: 0.6;
}

/* Footer Text */
.vtg-footer-text {
    text-align: center;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--vtg-border);
    color: var(--vtg-text-lighter);
    font-size: 0.875rem;
}

/* ============================================
   MODAL / POPUP
   ============================================ */

.vtg-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.vtg-modal-overlay.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.vtg-modal {
    background: var(--vtg-white);
    border-radius: var(--vtg-radius);
    max-width: 680px;
    width: calc(100% - 40px);
    max-height: 90vh;
    overflow: hidden;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
    box-shadow: var(--vtg-shadow-lg);
    box-sizing: border-box;
}

.vtg-modal-overlay.active .vtg-modal {
    transform: scale(1);
}

.vtg-modal-header {
    padding: 32px 32px 28px;
    border-bottom: 1px solid var(--vtg-border);
}

.vtg-modal-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--vtg-primary);
    margin: 0;
}

.vtg-modal-close {
    position: absolute;
    top: 28px;
    right: 32px;
    background: var(--vtg-gray);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--vtg-text);
    transition: var(--vtg-transition);
}

.vtg-modal-close:hover {
    background: var(--vtg-border);
}

.vtg-modal-body {
    padding: 32px;
    max-height: calc(90vh - 100px);
    overflow-y: auto;
    overflow-x: hidden;
    box-sizing: border-box;
}

* {
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .vtg-modal {
        width: 100%;
        max-width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
        margin: 0;
    }
    
    .vtg-modal-header {
        padding: 16px 20px;
        position: sticky;
        top: 0;
        background: var(--vtg-white);
        z-index: 100;
        border-bottom: 1px solid var(--vtg-border);
    }
    
    .vtg-modal-title {
        font-size: 1.25rem;
    }
    
    .vtg-modal-close {
        top: 12px;
        right: 16px;
        width: 32px;
        height: 32px;
        font-size: 1.5rem;
    }
    
    .vtg-modal-body {
        padding: 16px;
        height: calc(100% - 60px);
        max-height: none;
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Course info box */
    .vtg-course-info-box {
        padding: 16px;
        margin-bottom: 20px;
    }
    
    .vtg-course-info-box h3 {
        font-size: 1rem;
    }
    
    /* Form sections */
    .vtg-form-section {
        margin-bottom: 20px;
    }
    
    .vtg-section-title {
        font-size: 1rem;
    }
    
    /* Form groups */
    .vtg-form-group {
        margin-bottom: 14px;
    }
    
    .vtg-form-group label {
        font-size: 0.8125rem;
        margin-bottom: 6px;
    }
    
    .vtg-form-group input,
    .vtg-form-group select,
    .vtg-form-group textarea {
        padding: 10px 12px;
        font-size: 0.875rem;
    }
    
    /* Form row - single column on mobile */
    .vtg-form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    /* Form actions - not sticky, just normal flow */
    .vtg-form-actions,
    .vtg-form-actions-split {
        margin-top: 20px;
        flex-direction: column;
        gap: 10px;
        position: relative;
        bottom: auto;
        padding: 0;
        background: transparent;
        box-shadow: none;
    }
    
    .vtg-btn {
        width: 100%;
        padding: 14px 20px;
        font-size: 0.9375rem;
    }
    
    /* Confirmation */
    .vtg-confirmation-title {
        font-size: 1.25rem;
    }
    
    .vtg-confirmation-section {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    .vtg-confirmation-section h4 {
        font-size: 0.9375rem;
    }
    
    .vtg-confirm-item {
        font-size: 0.875rem;
        padding: 8px 0;
    }
}

/* ============================================
   REGISTRATION FORM - In Modal
   ============================================ */

.vtg-registration-container {
    /* Container is now the modal */
}

.vtg-registration-step {
    display: none;
}

.vtg-registration-step.vtg-step-active {
    display: block;
}

/* Course Info Box */
.vtg-course-info-box {
    background: var(--vtg-gray);
    padding: 24px;
    border-radius: var(--vtg-radius-sm);
    margin-bottom: 32px;
}

.vtg-course-info-box h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--vtg-primary);
    margin: 0 0 16px 0;
}

.vtg-info-grid {
    display: grid;
    gap: 10px;
}

.vtg-info-item {
    font-size: 0.875rem;
    color: var(--vtg-text);
}

.vtg-spots-info {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--vtg-border);
    font-weight: 600;
    color: var(--vtg-primary);
    font-size: 0.875rem;
}

/* Form Sections */
.vtg-form-section {
    margin-bottom: 28px;
}

.vtg-section-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--vtg-primary);
    margin: 0 0 20px 0;
}

/* Form Groups */
.vtg-form-group {
    margin-bottom: 18px;
}

.vtg-form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--vtg-text);
}

.vtg-form-group .required {
    color: #e74c3c;
}

.vtg-form-group input[type="text"],
.vtg-form-group input[type="email"],
.vtg-form-group input[type="tel"],
.vtg-form-group input[type="date"],
.vtg-form-group select,
.vtg-form-group textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.9375rem;
    border: 1px solid var(--vtg-border);
    border-radius: var(--vtg-radius-sm);
    transition: var(--vtg-transition);
    font-family: inherit;
    background: var(--vtg-white);
    color: var(--vtg-text);
    box-sizing: border-box;
}

@media (max-width: 768px) {
    .vtg-form-group input,
    .vtg-form-group select,
    .vtg-form-group textarea {
        max-width: 100%;
        width: 100% !important;
    }
}

.vtg-form-group input:focus,
.vtg-form-group select:focus,
.vtg-form-group textarea:focus {
    outline: none;
    border-color: var(--vtg-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.vtg-form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Form Row */
.vtg-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

@media (max-width: 768px) {
    .vtg-form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* Form Actions */
.vtg-form-actions {
    margin-top: 28px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.vtg-form-actions-split {
    justify-content: space-between;
}

@media (max-width: 768px) {
    .vtg-form-actions,
    .vtg-form-actions-split {
        position: sticky;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--vtg-white);
        padding: 16px;
        margin: 0 -16px -100px -16px;
        box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
        flex-direction: column;
        gap: 12px;
        z-index: 50;
    }
    
    .vtg-confirmation-title {
        font-size: 1.375rem;
    }
    
    .vtg-confirmation-section {
        padding: 20px 16px;
    }
}

#vtg-preview-btn,
#vtg-submit-btn {
    background: var(--vtg-primary) !important;
    color: var(--vtg-white) !important;
}

#vtg-back-btn {
    background: transparent;
    color: var(--vtg-primary);
    border: 2px solid var(--vtg-border);
}

#vtg-back-btn:hover {
    border-color: var(--vtg-primary);
}

/* Confirmation Header */
.vtg-confirmation-header {
    margin-bottom: 32px;
}

.vtg-confirmation-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--vtg-primary);
    margin: 0 0 12px 0;
}

.vtg-confirmation-subtitle {
    font-size: 0.9375rem;
    color: var(--vtg-text-light);
    margin: 0;
    line-height: 1.5;
}

/* Confirmation Display */
.vtg-confirmation-section {
    margin-bottom: 28px;
    padding: 28px;
    background: var(--vtg-gray);
    border-radius: var(--vtg-radius-sm);
}

.vtg-confirmation-section h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0 0 20px 0;
    color: var(--vtg-primary);
}

.vtg-confirmation-item {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--vtg-border);
    gap: 20px;
}

.vtg-confirmation-item:last-child {
    border-bottom: none;
}

.vtg-confirmation-label {
    font-weight: 600;
    color: var(--vtg-text-light);
    font-size: 0.9375rem;
    min-width: 120px;
}

.vtg-confirmation-value {
    color: var(--vtg-text);
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: right;
    flex: 1;
}

/* Success Message */
.vtg-success-message {
    text-align: center;
    padding: 60px 32px;
}

.vtg-success-icon {
    width: 80px;
    height: 80px;
    background: var(--vtg-accent);
    border-radius: 50%;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vtg-success-icon::before {
    content: '✓';
    font-size: 48px;
    color: var(--vtg-primary);
    font-weight: bold;
}

.vtg-success-icon svg {
    display: none;
}

.vtg-success-message h2 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--vtg-primary);
    margin: 0 0 12px 0;
}

.vtg-success-message p {
    color: var(--vtg-text-light);
    font-size: 1rem;
    margin: 0;
}

/* Error Messages */
.vtg-error {
    background: #fef2f2;
    border: 1px solid #fee;
    color: #991b1b;
    padding: 14px 18px;
    border-radius: var(--vtg-radius-sm);
    font-size: 0.875rem;
    margin-bottom: 20px;
}

/* Loading */
.vtg-loading {
    text-align: center;
    padding: 48px;
}

.vtg-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--vtg-border);
    border-top-color: var(--vtg-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

/* ============================================
   UTILITIES
   ============================================ */

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

.vtg-mt-1 { margin-top: 8px; }
.vtg-mt-2 { margin-top: 16px; }
.vtg-mt-3 { margin-top: 24px; }
.vtg-mb-1 { margin-bottom: 8px; }
.vtg-mb-2 { margin-bottom: 16px; }
.vtg-mb-3 { margin-bottom: 24px; }