/**
 * Base Styles - German Language Academy
 * Mobile-first, simplicity-driven design
 */

/* ============================================
   Reset & Base
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    color: #111827;
    background-color: #F9FAFB;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: #111827;
    margin-bottom: 16px;
}

h1 {
    font-size: 28px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

p {
    margin-bottom: 16px;
}

small {
    font-size: 14px;
    color: #6B7280;
}

/* ============================================
   Colors
   ============================================ */

:root {
    --color-primary: #2563EB;
    --color-secondary: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-neutral: #6B7280;
    
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-card: #FFFFFF;
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-disabled: #9CA3AF;
    --text-inverse: #FFFFFF;
    
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* ============================================
   Layout
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

.page {
    min-height: 100vh;
    padding-bottom: 80px; /* Space for bottom nav on mobile */
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    line-height: 1;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 44px; /* Touch target */
    width: 100%;
    max-width: 100%;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
    background-color: #1D4ED8;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: #EFF6FF;
}

.btn-text {
    background-color: transparent;
    color: var(--color-primary);
    border: none;
    padding: 8px 16px;
}

.btn-success {
    background-color: var(--color-secondary);
    color: var(--text-inverse);
}

.btn-success:hover:not(:disabled) {
    background-color: #059669;
}

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-label .required {
    color: var(--color-error);
    margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px; /* Prevents zoom on iOS */
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-height: 48px; /* Touch-friendly */
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background-color: #F3F4F6;
    color: var(--text-disabled);
    cursor: not-allowed;
}

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

.form-error {
    display: block;
    font-size: 14px;
    color: var(--color-error);
    margin-top: 4px;
}

.form-help {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Select dropdown styling */
.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* Radio buttons */
.radio-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.radio-item {
    display: flex;
    align-items: center;
    min-height: 44px;
    cursor: pointer;
}

.radio-item input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    cursor: pointer;
}

/* ============================================
   Cards
   ============================================ */

.card {
    background-color: var(--bg-card);
    border-radius: 8px;
    padding: 16px;
    box-shadow: var(--shadow-md);
    margin-bottom: 16px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-body {
    color: var(--text-secondary);
}

/* ============================================
   Navigation
   ============================================ */

.nav-top {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 8px 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.nav-bottom-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 12px;
    min-width: 60px;
    min-height: 44px;
    justify-content: center;
}

.nav-item.active {
    color: var(--color-primary);
}

.nav-item-icon {
    font-size: 20px;
    margin-bottom: 4px;
}

/* Main Menu (Hamburger Menu) */
.main-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding-top: 60px;
}

.main-menu.hidden {
    display: none;
}

.main-menu-content {
    background: var(--bg-primary);
    width: 280px;
    max-width: 90vw;
    height: 100%;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.main-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.main-menu-header h3 {
    margin: 0;
    font-size: 18px;
}

.main-menu-items {
    padding: 8px 0;
}

.main-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-primary);
    transition: background-color 0.2s;
}

.main-menu-item:hover {
    background-color: var(--bg-secondary);
}

.main-menu-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.main-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 16px;
}

@media (min-width: 769px) {
    .main-menu {
        display: none !important;
    }
}

/* ============================================
   Wizard/Stepper
   ============================================ */

.wizard {
    max-width: 600px;
    margin: 0 auto;
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    position: relative;
}

.step-indicator::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--border-color);
    z-index: 0;
}

.step {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.step-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.step.active .step-circle {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-inverse);
}

.step.completed .step-circle {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--text-inverse);
}

.step.completed .step-circle::before {
    content: '✓';
}

.step-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.step.active .step-label {
    color: var(--color-primary);
    font-weight: 500;
}

.step-content {
    background-color: var(--bg-primary);
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.step-actions {
    display: flex;
    gap: 12px;
    padding: 16px 0;
}

.step-actions .btn {
    flex: 1;
}

/* ============================================
   Alerts & Messages
   ============================================ */

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #10B981;
}

.alert-error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #EF4444;
}

.alert-warning {
    background-color: #FEF3C7;
    color: #92400E;
    border: 1px solid #F59E0B;
}

/* ============================================
   SweetAlert2 Customization
   ============================================ */

.swal-popup {
    border-radius: 12px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.swal-title {
    font-size: 24px;
    font-weight: 600;
    color: #111827;
}

.swal-confirm {
    background-color: var(--color-primary) !important;
    border-radius: 8px;
    padding: 12px 24px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.swal-confirm:hover {
    background-color: #1d4ed8 !important;
}

/* SweetAlert2 Toast positioning for mobile */
@media (max-width: 768px) {
    .swal2-toast {
        width: calc(100% - 32px) !important;
        max-width: 400px !important;
        margin: 16px !important;
    }
}

/* ============================================
   Loading
   ============================================ */

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

/* ============================================
   Language Switcher
   ============================================ */

.lang-switcher {
    position: relative;
    display: inline-block;
}

.lang-switcher select {
    padding: 8px 32px 8px 12px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    cursor: pointer;
}

/* ============================================
   Multi-Select Certificates
   ============================================ */

.certificates-multiselect {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
}

.certificate-group {
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.certificate-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
}

.certificate-group-header:hover {
    background: rgba(0, 0, 0, 0.02);
}

.certificate-group-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.cert-title-text {
    font-weight: 600;
}

.cert-title-selected {
    font-weight: 500;
    color: var(--color-primary);
    font-size: 14px;
}

.certificate-group.has-selections .certificate-group-title {
    color: var(--color-primary);
}

.certificate-group.has-selections .certificate-group-header {
    background: rgba(37, 99, 235, 0.05);
    border-left: 3px solid var(--color-primary);
}

.certificate-group-toggle {
    font-size: 18px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.certificate-group.active .certificate-group-toggle {
    transform: rotate(180deg);
}

.certificate-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.certificate-group.active .certificate-group-content {
    max-height: 500px;
    transition: max-height 0.5s ease-in;
}

.certificate-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 16px;
    padding-top: 8px;
}

.certificate-option {
    display: flex;
    align-items: center;
    padding: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    min-height: 44px;
}

.certificate-option:hover {
    background: #EFF6FF;
}

.certificate-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    cursor: pointer;
}

.certificate-option.selected {
    background: #EFF6FF;
    border: 1px solid var(--color-primary);
}

/* ============================================
   Searchable Select
   ============================================ */

.searchable-select-container {
    position: relative;
}

.searchable-select-input {
    width: 100%;
    padding-right: 40px;
}

.searchable-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    margin-top: 4px;
}

.searchable-select-dropdown:not(.hidden) {
    display: block;
}

.searchable-select-group {
    padding: 8px 0;
}

.searchable-select-group-title {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.searchable-select-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.2s;
    border-bottom: 1px solid var(--border-color);
}

.searchable-select-item:last-child {
    border-bottom: none;
}

.searchable-select-item:hover {
    background: #EFF6FF;
}

.searchable-select-item.selected {
    background: #EFF6FF;
    border-left: 3px solid var(--color-primary);
}

.searchable-select-item-name {
    font-weight: 500;
    color: var(--text-primary);
}

.searchable-select-no-results {
    padding: 24px 16px;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

/* ============================================
   Mobile Input with Country Selector
   ============================================ */

.mobile-input-container {
    display: flex;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-primary);
}

.country-selector {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 12px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
    min-width: 100px;
}

.country-selector:hover {
    background: var(--color-gray-100);
}

.country-flag {
    font-size: 20px;
    line-height: 1;
}

.country-code {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.country-arrow {
    font-size: 10px;
    color: var(--text-secondary);
    margin-left: 2px;
}

.mobile-input {
    flex: 1;
    border: none;
    border-radius: 0;
    padding-left: 16px;
}

.mobile-input:focus {
    box-shadow: none;
    border: none;
}

.mobile-input-container:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ============================================
   User Dropdown Menu
   ============================================ */

.dropdown-item {
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
}

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

/* ============================================
   Country Selector Modal
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    position: relative;
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(to bottom, #FAFBFC, #FFFFFF);
}

.modal-header h2,
.modal-header h3 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.modal-close:hover {
    background: var(--color-gray-100);
    color: var(--text-primary);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--bg-primary);
}

.modal-body .form-group {
    margin-bottom: 20px;
}

.modal-body .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.modal-body .form-group input,
.modal-body .form-group select,
.modal-body .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.modal-body .form-group input:focus,
.modal-body .form-group select:focus,
.modal-body .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.modal-body .form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 12px;
}

.modal-body .form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.country-search-container {
    margin-bottom: 16px;
}

.country-list-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.country-priority-group {
    margin-bottom: 16px;
}

.country-group-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding: 0 4px;
}

.country-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-primary);
}

.country-item:hover {
    background: #EFF6FF;
    border-color: var(--color-primary);
}

.country-item.selected {
    background: #EFF6FF;
    border-color: var(--color-primary);
    border-width: 2px;
}

.country-item-flag {
    font-size: 24px;
    line-height: 1;
    width: 32px;
    text-align: center;
}

.country-item-info {
    flex: 1;
}

.country-item-name {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.country-item-code {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ============================================
   Utilities
   ============================================ */

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

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

.hidden {
    display: none !important;
}

/* ============================================
   Responsive
   ============================================ */

@media (min-width: 768px) {
    h1 { font-size: 36px; }
    h2 { font-size: 30px; }
    h3 { font-size: 24px; }
    
    .container {
        padding: 24px;
    }
    
    .card {
        padding: 24px;
    }
    
    .btn {
        width: auto;
        min-width: 120px;
    }
    
    .nav-bottom {
        display: none;
    }
    
    .step-actions .btn {
        flex: 0 1 auto;
        min-width: 120px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
    }
}