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

/* Ensure hidden attribute always works */
[hidden] {
    display: none !important;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --error-color: #dc2626;
    --success-color: #16a34a;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #d1d5db;
    --border-focus: #2563eb;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-section: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.header .subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.header .small_print {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Form Sections */
.form-section {
    background: var(--bg-section);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: box-shadow var(--transition-normal);
}

.form-section:hover {
    box-shadow: var(--shadow-md);
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-color);
}

.section-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: -0.75rem;
    margin-bottom: 1.25rem;
    padding-top: 0.75rem;
    line-height: 1.5;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

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

/* Labels */
.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.label-with-help {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.label-with-help label {
    margin-bottom: 0;
}

.help-btn {
    border: 1px solid var(--primary-color);
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.55rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.help-btn:hover {
    background: var(--primary-color);
    color: var(--bg-white);
}

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

/* Inputs */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

input:invalid:not(:placeholder-shown):not(:focus),
textarea:invalid:not(:placeholder-shown):not(:focus) {
    border-color: var(--error-color);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Radio Groups */
.radio-group {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.25rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 400;
}

.radio-label input[type="radio"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Error Messages */
.error-message {
    font-size: 0.8125rem;
    color: var(--error-color);
    margin-top: 0.375rem;
    min-height: 1.25rem;
}

/* File Upload */
.file-upload-container {
    margin-top: 0.5rem;
}

.file-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background-color: var(--bg-light);
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.drop-text {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.browse-link {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: underline;
}

.file-types {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

/* File List */
.file-list {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

.file-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

.file-remove {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.file-remove:hover {
    color: var(--error-color);
}

/* Upload Progress */
.upload-progress {
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width var(--transition-normal);
}

.progress-text {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Certification Notice */
.certification-notice {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.certification-notice p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Form Actions */
.form-actions {
    text-align: center;
    margin-top: 2rem;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 3rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--bg-white);
    background-color: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    min-width: 200px;
}

.submit-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Modals */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
    animation: fadeIn var(--transition-normal);
}

.modal[hidden] {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-normal);
}

.claim-class-modal-content {
    max-width: 760px;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
    text-align: left;
    position: relative;
}

.modal-close-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.claim-class-list {
    margin-top: 1rem;
}

.claim-class-list p {
    margin-bottom: 0.625rem;
}

.claim-class-list ul {
    margin: 0.25rem 0 0.875rem 1.25rem;
    padding-left: 1rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.claim-class-list li {
    margin-bottom: 0.45rem;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-icon.success {
    background-color: rgba(22, 163, 74, 0.1);
    color: var(--success-color);
}

.modal-icon.error {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--error-color);
}

.modal-icon svg {
    width: 32px;
    height: 32px;
}

.modal-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.modal-content p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.reference-number {
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-sm);
}

.modal-btn {
    margin-top: 1.5rem;
    padding: 0.75rem 2rem;
    font-size: 0.9375rem;
    font-weight: 500;
    font-family: inherit;
    color: var(--bg-white);
    background-color: var(--primary-color);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.modal-btn:hover {
    background-color: var(--primary-hover);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .header h1 {
        font-size: 1.375rem;
    }

    .form-section {
        padding: 1.25rem;
    }

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

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

    .radio-group {
        flex-direction: column;
        gap: 0.75rem;
    }

    .submit-btn {
        width: 100%;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .form-section {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }

    .submit-btn,
    .file-drop-zone {
        display: none;
    }
}