:root {
    --sf-pro: "SF Pro Display", -apple-system, BlinkMacOSystemFont, "Segoe UI", Roboto, sans-serif;
    --primary-blue: #0071e3;
    --primary-dark: #0066cc;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --gray-bg: #f5f5f7;
    --white: #ffffff;
    --border-light: #d2d2d7;
    --radius: 12px;
    --transition: all 0.22s ease;
}

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

body {
    font-family: var(--sf-pro);
    background: var(--gray-bg);
    color: var(--text-primary);
    line-height: 1.4;
    min-height: 100vh;
    padding: 0;
}

.container {
    width: 100%;
    min-height: 100vh;
    background: var(--white);
}

header {
    background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
    padding: 48px 5% 32px;
    text-align: center;
}

header h1 {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 600;
    letter-spacing: -0.3px;
    margin: 0;
}

main {
    padding: 24px 5% 40px;
    max-width: 1200px;
    margin: 0 auto;
}

section {
    margin-bottom: 24px;
}

h2 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 12px;
}

label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

input, select, textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 15px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    background: #fff;
    transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: 8px;
}

.checkbox-group input {
    width: 16px;
    height: 16px;
    margin-top: 3px;
    accent-color: var(--primary-blue);
}

.btn-submit {
    width: 100%;
    max-width: 340px;
    padding: 12px;
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 980px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 3px 10px rgba(0, 113, 227, 0.2);
    display: block;
    margin: 20px auto 0;
}

.btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.3);
}

footer {
    text-align: center;
    padding: 32px 5% 24px;
    color: var(--text-secondary);
    font-size: 13px;
    border-top: 1px solid var(--border-light);
}

label.required::after {
    content: " *";
    color: #ff3b30;
    font-weight: 500;
}

@media (max-width: 768px) {
    header {
        padding: 40px 5% 24px;
    }
    header h1 {
        font-size: 28px;
    }
    main {
        padding: 20px 5% 32px;
    }
    .grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .form-group {
        margin-bottom: 10px;
    }
}