/* TrendAI Brand Colors - Dark Theme (Landing Page 3 Style) */
:root {
    /* Primary Colors */
    --trendai-black: #000000;
    --trendai-void: #FFFFFF;
    --trendai-red: #D71920;

    /* Secondary Colors */
    --trendai-amber: #FF9500;
    --trendai-signal: #2E0FE4;

    /* Dark Theme Colors */
    --dark-bg: #000000;
    --dark-container: rgba(255, 255, 255, 0.08);
    --dark-container-hover: rgba(255, 255, 255, 0.12);
    --dark-text-primary: #FFFFFF;
    --dark-text-secondary: #A0A0A0;
    --dark-border: rgba(255, 255, 255, 0.15);
    --dark-input-bg: #F9F9F9;
    --dark-input-text: #000000;

    /* Typography */
    --font-heading: 'Gotham', 'Aptos', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Work Sans', 'Aptos', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* TrendAI Gradients */
    --gradient-text: linear-gradient(to right, #D71920 0%, #D71920 40%, #FF9500 100%);
    --gradient-progress: linear-gradient(90deg, #D71920 0%, #D71920 50%, #FF9500 100%);
    --gradient-button: linear-gradient(135deg, #D71920 0%, #a01419 100%);
    --gradient-accent: linear-gradient(135deg, rgba(215, 25, 32, 0.2) 0%, rgba(255, 149, 0, 0.2) 100%);

    /* Functional Colors */
    --success-color: #10B981;
    --danger-color: #EF4444;

    /* Shadows for dark theme */
    --shadow-dark: 0 4px 6px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-dark-lg: 0 10px 25px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.3);
    --glow-red: 0 0 20px rgba(215, 25, 32, 0.4), 0 0 40px rgba(215, 25, 32, 0.2);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--dark-text-primary);
    background-color: var(--dark-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* Background Image with Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/images/spark-background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    opacity: 0.15;
    z-index: -1;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    padding: 0;
    background: var(--dark-container);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-dark-lg);
    border: 1px solid var(--dark-border);
    border-bottom: 3px solid var(--trendai-red);
    overflow: hidden;
}

.header-image {
    width: 100%;
    height: auto;
    display: block;
}

/* Progress Bar */
.progress-container {
    margin-bottom: 40px;
}

.progress-bar {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 0 20px;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 25px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-progress);
    z-index: 0;
    box-shadow: 0 0 10px rgba(215, 25, 32, 0.5);
}

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

.step-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--dark-bg);
    border: 3px solid var(--dark-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--dark-text-secondary);
    transition: all 0.3s ease;
}

.progress-step.active .step-circle {
    background-color: var(--trendai-red);
    border-color: var(--trendai-red);
    color: var(--dark-text-primary);
    box-shadow: var(--glow-red);
}

.progress-step.completed .step-circle {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: var(--dark-text-primary);
}

.step-label {
    margin-top: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark-text-secondary);
    text-align: center;
}

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

/* Form Container */
.form-container {
    background: var(--dark-container);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow-dark-lg);
    border: 1px solid var(--dark-border);
    border-top: 3px solid var(--trendai-red);
}

.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.form-step h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark-text-primary);
}

.step-description {
    color: var(--dark-text-secondary);
    margin-bottom: 30px;
    font-size: 1rem;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--dark-text-primary);
    font-size: 0.9rem;
}

.form-group small {
    color: var(--dark-text-secondary) !important;
}

.required {
    color: var(--danger-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--dark-border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: inherit;
    background-color: var(--dark-input-bg);
    color: var(--dark-input-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--trendai-red);
    box-shadow: 0 0 0 3px rgba(215, 25, 32, 0.3), var(--glow-red);
    transform: translateY(-1px);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 30px;
}

.upload-section h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--dark-text-primary);
}

.upload-tips {
    background: var(--gradient-accent);
    border-left: 4px solid var(--trendai-red);
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    backdrop-filter: blur(10px);
}

.upload-tips p {
    margin: 0 0 10px 0;
    font-size: 0.95rem;
    color: var(--dark-text-primary);
}

.upload-tips ul {
    margin: 0;
    padding-left: 20px;
    list-style-type: disc;
}

.upload-tips li {
    font-size: 0.9rem;
    color: var(--dark-text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.upload-tips li:last-child {
    margin-bottom: 0;
}

.upload-container {
    position: relative;
}

.upload-container input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    border: 2px dashed var(--dark-border);
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-label:hover {
    border-color: var(--trendai-red);
    background: var(--gradient-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--trendai-red);
    margin-bottom: 12px;
}

.upload-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--dark-text-primary);
    margin-bottom: 4px;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--dark-text-secondary);
}

.file-preview {
    margin-top: 15px;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    display: none;
    border: 1px solid var(--dark-border);
}

.file-preview.active {
    display: block;
}

.file-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    margin-top: 10px;
}

/* Privacy Notice */
.privacy-notice {
    background: var(--gradient-accent);
    border-left: 4px solid var(--trendai-red);
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
    box-shadow: var(--shadow-dark);
    backdrop-filter: blur(10px);
}

.privacy-notice h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--dark-text-primary);
}

.privacy-notice p {
    font-size: 0.9rem;
    color: var(--dark-text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

.privacy-notice a {
    color: var(--trendai-red);
    text-decoration: underline;
}

.consent-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.consent-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    margin-top: 2px;
    cursor: pointer;
    flex-shrink: 0;
    appearance: auto;
    -webkit-appearance: checkbox;
    -moz-appearance: checkbox;
}

.consent-checkbox label {
    font-size: 0.95rem;
    color: var(--dark-text-primary);
    cursor: pointer;
}

/* Checkbox Groups (for multi-select options) */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 8px;
}

.checkbox-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    min-width: 18px;
    min-height: 18px;
    margin-top: 2px;
    cursor: pointer;
    flex-shrink: 0;
    appearance: auto;
    -webkit-appearance: checkbox;
    -moz-appearance: checkbox;
}

.checkbox-item label {
    font-size: 0.95rem;
    color: var(--dark-text-primary);
    cursor: pointer;
    line-height: 1.5;
}

/* Document Type Selector */
.document-type-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

.document-type-option {
    position: relative;
}

.document-type-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.document-type-label {
    display: flex;
    flex-direction: column;
    padding: 20px;
    border: 2px solid var(--dark-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
}

.document-type-label:hover {
    border-color: var(--trendai-red);
    background: var(--gradient-accent);
    box-shadow: var(--shadow-dark);
}

.document-type-option input[type="radio"]:checked + .document-type-label {
    border-color: var(--trendai-red);
    background: var(--gradient-accent);
    box-shadow: var(--glow-red);
}

.document-type-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-text-primary);
    margin-bottom: 5px;
}

.document-type-desc {
    font-size: 0.9rem;
    color: var(--dark-text-secondary);
}

.document-section {
    margin-top: 30px;
}

/* Review Section */
.review-section {
    background: var(--gradient-accent);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--dark-border);
    backdrop-filter: blur(10px);
}

.review-group {
    margin-bottom: 30px;
}

.review-group:last-child {
    margin-bottom: 0;
}

.review-group h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--dark-text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--dark-border);
}

.review-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--dark-border);
}

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

.review-label {
    font-weight: 500;
    color: var(--dark-text-secondary);
}

.review-value {
    font-weight: 500;
    color: var(--dark-text-primary);
    text-align: right;
}

/* Buttons */
.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 30px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-button);
    color: var(--dark-text-primary);
    font-family: var(--font-body);
    font-weight: 600;
    box-shadow: var(--shadow-dark);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #a01419 0%, #D71920 100%);
    transform: translateY(-2px);
    box-shadow: var(--glow-red);
}

.btn-secondary {
    background-color: transparent;
    color: var(--dark-text-primary);
    border: 2px solid var(--dark-border);
    font-family: var(--font-body);
    font-weight: 600;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--trendai-red);
    color: var(--trendai-red);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--success-color);
    color: var(--dark-text-primary);
    font-family: var(--font-body);
    font-weight: 600;
    box-shadow: var(--shadow-dark);
}

.btn-success:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

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

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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

/* Success Message */
.success-message {
    text-align: center;
    padding: 40px;
}

.success-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--success-color);
    color: var(--dark-text-primary);
    font-size: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    animation: scaleIn 0.5s ease;
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.5);
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.success-message h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--dark-text-primary);
    margin-bottom: 15px;
}

.success-message p {
    font-size: 1.1rem;
    color: var(--dark-text-secondary);
    margin-bottom: 10px;
}

.success-detail {
    font-size: 1rem;
    color: var(--dark-text-primary);
    margin: 20px 0;
}

.next-steps {
    background: var(--gradient-accent);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--trendai-red);
    margin-top: 20px;
    text-align: left;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
    color: var(--dark-text-secondary);
    font-size: 0.9rem;
}

.footer a {
    color: var(--trendai-red);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .form-container {
        padding: 25px;
    }

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

    .progress-bar {
        padding: 0 10px;
    }

    .step-circle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .step-label {
        font-size: 0.75rem;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .btn {
        width: 100%;
    }

    .review-item {
        flex-direction: column;
        gap: 5px;
    }

    .review-value {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .form-step h2 {
        font-size: 1.5rem;
    }

    .step-label {
        display: none;
    }
}