:root {
    --primary-color: #1e40af;
    --primary-hover: #1e3a8a;
    --secondary-color: #64748b;
    --success-color: #059669;
    --background: #fafbfc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--surface);
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: all 0.15s ease;
    margin-right: 1rem;
}

.back-link:hover {
    background: var(--background);
    color: var(--primary-color);
}

.logo svg {
    width: 32px;
    height: 32px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.015em;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Content */
.content {
    flex: 1;
    padding: 2.5rem 2rem;
}

/* Intro Card */
.intro-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 1.75rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.intro-card h2 {
    font-size: 1.375rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.intro-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Form Sections */
.form-section {
    background: var(--surface);
    padding: 1.75rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 1.25rem;
}

.form-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
    letter-spacing: -0.015em;
}

.section-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.form-grid:last-child {
    margin-bottom: 0;
}

/* Form Groups */
.form-group {
    display: flex;
    flex-direction: column;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
    transition: all 0.15s ease;
    font-family: inherit;
    background: var(--surface);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.08);
}

.form-group input[readonly] {
    background: var(--background);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.form-group textarea {
    resize: vertical;
    min-height: 90px;
}

/* Equipment Grid */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 0.875rem;
}

/* Equipment Card */
.equipment-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.125rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--surface);
}

.equipment-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.equipment-card:has(input:checked) {
    border-color: var(--primary-color);
    background: rgba(30, 64, 175, 0.04);
}

.equipment-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: var(--background);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.125rem;
}

.equipment-info {
    flex: 1;
}

.equipment-info h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 0.125rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.equipment-info p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Custom Checkbox */
.checkbox-wrapper {
    position: relative;
    cursor: pointer;
}

.checkbox-wrapper input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    display: block;
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--border);
    border-radius: 5px;
    transition: all 0.15s ease;
    background: var(--surface);
}

.checkbox-wrapper input:checked ~ .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-wrapper input:checked ~ .checkmark::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 7px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 0.875rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.75rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

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

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

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

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.6;
}

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

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

/* Footer */
.footer {
    background: var(--surface);
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--surface);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    text-align: center;
    max-width: 440px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
}

.modal-icon {
    width: 56px;
    height: 56px;
    background: rgba(5, 150, 105, 0.1);
    color: var(--success-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.25rem;
}

.modal-content h2 {
    font-size: 1.375rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(16px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .content {
        padding: 1.5rem 1rem;
    }

    .header {
        padding: 1rem;
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .logo {
        flex-direction: row;
        width: 100%;
    }

    .logo h1 {
        font-size: 1.125rem;
    }

    .form-section {
        padding: 1.5rem;
    }

    .intro-card {
        padding: 1.5rem;
    }

    .intro-card h2 {
        font-size: 1.25rem;
    }

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

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

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }

    .modal-content {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .equipment-card {
        padding: 0.875rem;
    }

    .equipment-icon {
        width: 32px;
        height: 32px;
        min-width: 32px;
        font-size: 1rem;
    }

    .equipment-info h4 {
        font-size: 0.875rem;
    }

    .equipment-info p {
        font-size: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .form-actions {
        display: none;
    }

    .form-section {
        box-shadow: none;
        border: 1px solid var(--border);
        page-break-inside: avoid;
    }
}