:root {
    --color-bg:            #f8fafc;
    --color-surface:       #ffffff;
    --color-border:        #e2e8f0;

    --color-text-primary:  #0f172a;
    --color-text-secondary:#64748b;

    --color-accent:        #ff964f;
    --color-accent-hover:  #4f46e5;

    --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 15px;
    color: var(--color-text-primary);
    background: var(--color-bg);
    min-height: 100vh;
}

.page {
    max-width: 480px;
    margin: 0 auto;
    padding: 48px 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero__title {
    font-size: 22px;
    margin-bottom: 8px;
}

.hero__subtitle {
    color: var(--color-text-secondary);
}

.survey__status {
    color: var(--color-text-secondary);
}

.survey__form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.reason-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: none;
}

.reason-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    box-shadow: var(--shadow-card);
    cursor: pointer;
}

.reason-option input {
    accent-color: var(--color-accent);
}

.other-reason-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--color-text-primary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
}

.other-reason-input:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.btn--primary {
    background: var(--color-accent);
    color: #ffffff;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.thank-you {
    color: var(--color-text-secondary);
}

.page-footer {
    text-align: center;
    margin-top: 8px;
}

.page-footer__link {
    color: var(--color-text-secondary);
    font-size: 13px;
    text-decoration: underline;
}

.page-footer__link:hover {
    color: var(--color-accent-hover);
}