:root {
    --primary-color: #3B82F6;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --background-color: #F9FAFB;
    --card-color: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--card-color);
    box-shadow: var(--shadow);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.language-selector select {
    background: var(--card-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s;
}

.language-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Progress Indicator */
.progress-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.progress-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    position: relative;
}

.progress-line {
    position: absolute;
    top: 1.25rem;
    left: 2.5rem;
    right: 2.5rem;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}

.progress-line-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2;
    background: var(--background-color);
    padding: 0 0.75rem;
    border-radius: 1rem;
}

.step-circle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.step-circle.pending {
    background: var(--card-color);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
}

.step-circle.current {
    background: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.step-circle.completed {
    background: var(--success-color);
    color: white;
    border: 2px solid var(--success-color);
}

.step-label {
    font-size: 0.75rem;
    text-align: center;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.step-label.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* Main Content */
.main-content {
    max-width: 800px;
    margin: 0 auto 3rem;
    padding: 0 1rem;
}

.wizard-card {
    background: var(--card-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}

.wizard-step {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.wizard-step.active {
    display: block;
    opacity: 1;
}

.wizard-step.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Flexible form rows for better proportions */
.form-row.narrow-wide {
    grid-template-columns: minmax(200px, 1fr) 2fr;
}

.form-row.wide-narrow {
    grid-template-columns: 2fr minmax(150px, 1fr);
}

.form-row.equal {
    grid-template-columns: 1fr 1fr;
}

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

label {
    display: block;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

input, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--card-color);
    transition: border-color 0.2s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-with-button {
    display: flex;
    gap: 0.5rem;
    align-items: stretch;
}

.input-with-button input {
    flex: 1;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.input-with-button .btn {
    align-self: stretch;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: transparent;
    line-height: 1;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background: #2563EB;
    border-color: #2563EB;
}

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

.btn-secondary:hover {
    background: #F3F4F6;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-success {
    background: var(--success-color);
    color: white;
    border: 1px solid var(--success-color);
}

.btn-success:hover {
    background: #059669;
    border-color: #059669;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
    border: 1px solid var(--warning-color);
}

.btn-warning:hover {
    background: #D97706;
    border-color: #D97706;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Step Navigation */
.step-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.nav-left {
    flex: 1;
}

.nav-right {
    flex: 1;
    text-align: right;
}

/* Collapsible Sections */
.collapsible-section {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    overflow: hidden;
}

.collapsible-header {
    padding: 1rem;
    background: #F8FAFC;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    user-select: none;
    transition: background-color 0.2s;
}

.collapsible-header:hover {
    background: #F1F5F9;
}

.collapsible-content {
    padding: 0 1rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.collapsible-content.open {
    padding: 1rem;
    max-height: 500px;
}

.chevron {
    transition: transform 0.2s ease;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.chevron.rotated {
    transform: rotate(180deg);
}

/* Result Section */
.result-section {
    text-align: center;
}

.result-section p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.generated-link {
    background: #F8FAFC;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
    word-break: break-all;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    text-align: left;
}

.qr-code-container {
    text-align: center;
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: #F3F4F6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    border-radius: 0.5rem;
    border: 2px dashed var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.action-buttons .btn {
    min-width: 200px;
    flex: 1;
    max-width: 250px;
}

@media (max-width: 768px) {
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }

    .action-buttons .btn {
        width: 100%;
        max-width: 280px;
        min-width: unset;
        flex: unset;
    }
}

/* Instructions */
.instructions {
    background: rgba(59, 130, 246, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-top: 2rem;
    color: var(--text-primary);
}

.instructions h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.instructions p {
    margin-bottom: 0.75rem;
}

/* Success Animation */
.success-animation {
    background: var(--success-color) !important;
    color: white !important;
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .progress-container {
        margin: 1rem auto;
    }

    .progress-bar {
        flex-direction: column;
        gap: 1rem;
    }

    .progress-line {
        display: none;
    }

    .step-circle {
        width: 3rem;
        height: 3rem;
        font-size: 1rem;
    }

    .wizard-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }

    .step-title {
        font-size: 1.25rem;
    }

    .btn {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
    }
}