/**
 * ==============================================
 * AyAcademy Component CSS
 * ==============================================
 * 
 * Wiederverwendbare UI-Komponenten für die gesamte App.
 * Diese Datei wird auf den meisten Seiten eingebunden.
 * 
 * WICHTIG FÜR LLMs/Vibe Coding:
 * - Alle wiederverwendbaren Komponenten sind hier definiert
 * - Seiten-spezifische Styles gehören in die jeweilige HTML oder eigene CSS
 * - Neue Komponenten hier hinzufügen für globale Nutzung
 * 
 * Struktur:
 *   1. Cards
 *   2. Buttons
 *   3. Form Elements
 *   4. Filter Tabs
 *   5. Search Box
 *   6. Badges
 *   7. Status Messages
 *   8. Modals
 * ==============================================
 */

/* ==============================================
   1. CARDS
   ============================================== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: rgba(197, 255, 79, 0.3);
}

.card-clickable {
    cursor: pointer;
}

.card-clickable:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Course Card */
.course-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.course-card:hover {
    border-color: rgba(197, 255, 79, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.course-thumbnail {
    position: relative;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, rgba(197, 255, 79, 0.1) 0%, rgba(107, 142, 35, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.course-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-thumbnail-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--learn-primary);
    opacity: 0.5;
}

.course-thumbnail-placeholder svg {
    width: 48px;
    height: 48px;
}

.course-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(5, 8, 22, 0.8);
    backdrop-filter: blur(8px);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--learn-primary);
}

.course-duration {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(5, 8, 22, 0.8);
    backdrop-filter: blur(8px);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.course-duration svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

.course-info {
    padding: var(--spacing-lg);
}

.course-info h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.course-info p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.course-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.course-steps {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--ay-mid-grey);
}

.course-steps svg {
    width: 16px;
    height: 16px;
}

.course-arrow {
    width: 36px;
    height: 36px;
    background: rgba(197, 255, 79, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.course-card:hover .course-arrow {
    background: var(--learn-primary);
}

.course-arrow svg {
    width: 18px;
    height: 18px;
    color: var(--learn-primary);
    transition: color var(--transition-fast);
}

.course-card:hover .course-arrow svg {
    color: var(--ay-dark-navy);
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

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

/* ==============================================
   2. BUTTONS
   ============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn svg {
    width: 20px;
    height: 20px;
}

/* Primary Button */
.btn-primary {
    background: var(--learn-gradient);
    color: var(--ay-dark-navy);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(197, 255, 79, 0.35);
}

/* Secondary Button */
.btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Danger Button */
.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error-color);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

/* Small Button */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Full Width */
.btn-full {
    width: 100%;
}

/* Google Button */
.btn-google {
    background: white;
    color: #1f2937;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-google:hover:not(:disabled) {
    background: #f3f4f6;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

.btn-google svg {
    flex-shrink: 0;
}

/* ==============================================
   3. FORM ELEMENTS
   ============================================== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: var(--ay-mid-grey);
}

.form-input:focus {
    outline: none;
    border-color: var(--learn-primary);
    box-shadow: 0 0 0 3px rgba(197, 255, 79, 0.1);
}

.form-input.error {
    border-color: var(--error-color);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.field-error {
    font-size: 0.8125rem;
    color: var(--error-color);
    margin-top: 0.375rem;
    display: none;
}

.field-error.show {
    display: block;
}

/* Textarea */
.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Select */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.form-select option {
    background: var(--ay-dark-navy);
}

/* ==============================================
   4. FILTER TABS
   ============================================== */
.filter-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-tabs {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.625rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
}

.filter-tab:hover {
    border-color: rgba(197, 255, 79, 0.3);
    color: white;
}

.filter-tab.active {
    background: var(--learn-gradient);
    border-color: transparent;
    color: var(--ay-dark-navy);
}

@media (max-width: 900px) {
    .filter-section {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ==============================================
   5. SEARCH BOX
   ============================================== */
.search-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    min-width: 280px;
    transition: border-color var(--transition-fast);
}

.search-box:focus-within {
    border-color: var(--learn-primary);
}

@media (max-width: 900px) {
    .search-box {
        min-width: unset;
        width: 100%;
    }
}

.search-box svg {
    width: 18px;
    height: 18px;
    color: var(--ay-mid-grey);
    flex-shrink: 0;
}

.search-box input {
    background: none;
    border: none;
    color: white;
    font-size: 0.9375rem;
    font-family: inherit;
    width: 100%;
    outline: none;
}

.search-box input::placeholder {
    color: var(--ay-mid-grey);
}

/* ==============================================
   6. BADGES
   ============================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: rgba(197, 255, 79, 0.15);
    color: var(--learn-primary);
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success-color);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error-color);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info-color);
}

.badge-neutral {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Premium/Tier Badge */
.tier-badge {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.tier-badge.free {
    display: none;
}

.tier-badge.premium {
    background: rgba(197, 255, 79, 0.2);
}

.tier-badge.premium svg {
    width: 14px;
    height: 14px;
    color: var(--learn-primary);
}

/* ==============================================
   7. STATUS MESSAGES
   ============================================== */
.status-box {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    display: none;
    align-items: flex-start;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-box.show {
    display: flex;
}

.status-box.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-box.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.status-box.info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.status-box.warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.status-content {
    flex: 1;
}

.status-content strong {
    display: block;
    margin-bottom: 0.25rem;
}

.status-box.error strong {
    color: var(--error-color);
}

.status-box.success strong {
    color: var(--success-color);
}

.status-box.info strong {
    color: var(--info-color);
}

.status-box.warning strong {
    color: var(--warning-color);
}

.status-content p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

/* ==============================================
   8. MODALS
   ============================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 22, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Body-Lock wenn Modal offen */
body.modal-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
}

.modal {
    background: #0a0f1a;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overscroll-behavior: contain;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--card-border);
}

.modal-header h2 {
    font-size: 1.375rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--ay-mid-grey);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    max-height: calc(90vh - 80px);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* ==============================================
   9. CONSENT / CHECKBOX STYLES
   ============================================== */
.consent-section {
    margin-top: var(--spacing-lg);
    padding-top: 1.25rem;
    border-top: 1px solid var(--card-border);
}

.consent-group {
    margin-bottom: 1rem;
}

.consent-group.consent-optional {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.consent-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    line-height: 1.5;
}

.consent-checkbox {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 3px;
    cursor: pointer;
    accent-color: var(--learn-primary);
}

.consent-text {
    font-size: 0.875rem;
    color: var(--ay-mid-grey);
}

.consent-text a {
    color: var(--learn-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.consent-text a:hover {
    color: #d4ff8c;
}

.required-marker {
    color: var(--error-color);
    font-weight: 600;
}

.optional-marker {
    color: var(--ay-mid-grey);
    font-size: 0.8125rem;
    opacity: 0.7;
}

.consent-hint {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--ay-mid-grey);
}

/* ==============================================
   10. AUTH TABS (Login/Register Toggle)
   ============================================== */
.auth-tabs {
    display: flex;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 0.375rem;
    margin-bottom: var(--spacing-lg);
}

.auth-tab {
    flex: 1;
    padding: 0.875rem 1rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--ay-mid-grey);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    text-align: center;
}

.auth-tab:hover {
    color: white;
}

.auth-tab.active {
    background: var(--learn-gradient);
    color: var(--ay-dark-navy);
}

/* Auth Divider */
.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-lg) 0;
    gap: 1rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--card-border);
}

.auth-divider span {
    font-size: 0.8125rem;
    color: var(--ay-mid-grey);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}