:root {
    --primary: #0f8a5f;
    --primary-bright: #0f8a5f;
    --background: #f8f9fa;
    --surface: #ffffff;
    --surface-low: #f3f4f5;
    --text: #191c1d;
    --muted: #667078;
    --outline: #c9d1c7;
    --error: #ba1a1a;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: Pretendard, Arial, sans-serif;
    color: var(--text);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-header {
    height: 56px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border-bottom: 1px solid var(--outline);
}

.logo {
    color: var(--primary);
    font-size: 21px;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.header-link {
    font-size: 13px;
    font-weight: 600;
}

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

.auth-main {
    width: 100%;
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 36px 20px 72px;
}

.auth-wrap {
    width: 100%;
    max-width: 420px;
}

.page-heading {
    margin-bottom: 22px;
}

.page-heading h1 {
    margin: 0;
    font-size: 27px;
    line-height: 1.3;
    letter-spacing: -0.04em;
}

.page-heading p {
    margin: 7px 0 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.page-message {
    margin-bottom: 14px;
    padding: 11px 13px;
    color: #0f8a5f;
    background: #edf9f0;
    border: 1px solid #b9dfc2;
    border-radius: 7px;
    font-size: 12px;
}

.auth-card {
    padding: 25px;
    background: var(--surface);
    border: 1px solid var(--outline);
    border-radius: 8px;
}

.form-field + .form-field {
    margin-top: 22px;
}

.form-field label {
    display: block;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 700;
}

.form-field input {
    width: 100%;
    height: 44px;
    padding: 0 14px;
    color: var(--text);
    background: var(--background);
    border: 1px solid var(--outline);
    border-radius: 6px;
    outline: none;
    transition: border-color .18s ease, box-shadow .18s ease;
}

.form-field input:focus {
    border-color: var(--primary-bright);
    box-shadow: 0 0 0 1px rgba(0, 200, 83, .12);
}

.form-field input.invalid {
    border-color: var(--error);
}

.password-wrap {
    position: relative;
}

.password-wrap input {
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: 10px;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #6f777c;
    transform: translateY(-50%);
    cursor: pointer;
}

.field-error,
.submit-error {
    margin: 6px 0 0;
    color: var(--error);
    font-size: 11px;
    line-height: 1.5;
}

.submit-error {
    margin-top: 17px;
    text-align: center;
}

.form-options {
    margin-top: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    font-size: 12px;
    font-weight: 600;
}

.form-options a {
    color: var(--primary);
}

.remember-label {
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
}

.remember-label input {
    accent-color: var(--primary);
}

.primary-button {
    width: 100%;
    height: 48px;
    margin-top: 28px;
    border: 0;
    border-radius: 6px;
    background: var(--primary);
    color: white;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity .18s ease, transform .18s ease;
}

.primary-button:hover {
    opacity: .9;
}

.primary-button:active {
    transform: scale(.99);
}

.primary-button:disabled {
    opacity: .6;
    cursor: default;
}

.sub-link {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--outline);
    text-align: center;
    color: var(--muted);
    font-size: 12px;
}

.sub-link a {
    margin-left: 4px;
    color: var(--primary);
    font-weight: 700;
}

.site-footer {
    padding: 22px 20px;
    text-align: center;
    background: var(--surface-low);
    border-top: 1px solid var(--outline);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 13px;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 11px;
}

.copyright {
    margin: 0;
    color: #81898e;
    font-size: 10px;
}

@media (max-width: 640px) {
    .site-header {
        padding: 0 20px;
    }

    .auth-main {
        padding-top: 28px;
    }

    .auth-card {
        padding: 22px;
    }
}