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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    color: #333;
    background: #fafafa;
}

header {
    background: #fff;
    border-bottom: 1px solid #dbdbdb;
    padding: 0.75rem 1rem;
}

header nav {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: #333;
}

.nav-links a {
    margin-left: 1rem;
    text-decoration: none;
    color: #0095f6;
}

main {
    flex: 1;
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 1rem;
    width: 100%;
}

footer {
    text-align: center;
    padding: 1rem;
    color: #999;
    font-size: 0.85rem;
    border-top: 1px solid #dbdbdb;
}

/* Auth pages */
.auth-page {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border: 1px solid #dbdbdb;
    border-radius: 8px;
    text-align: center;
}

.auth-page h1 {
    margin-bottom: 1rem;
}

.auth-page > p {
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* Auth forms */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.auth-form label {
    font-weight: 600;
    margin-top: 0.5rem;
}

.auth-form input {
    padding: 0.5rem;
    border: 1px solid #dbdbdb;
    border-radius: 4px;
    font-size: 1rem;
}

.auth-form button {
    margin-top: 0.75rem;
    padding: 0.6rem;
    background: #0095f6;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}

.auth-form button:hover {
    background: #007ad9;
}

/* Flash messages */
.flash {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.flash-error {
    background: #fdecea;
    color: #b71c1c;
    border: 1px solid #f5c6cb;
}

.flash-success {
    background: #e8f5e9;
    color: #1b5e20;
    border: 1px solid #c8e6c9;
}

/* Profile page */
.profile-page {
    max-width: 500px;
    margin: 0 auto;
}

.profile-page h1 {
    margin-bottom: 1.5rem;
}

.profile-section {
    background: #fff;
    border: 1px solid #dbdbdb;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.profile-section h2 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.profile-form label {
    font-weight: 600;
    margin-top: 0.25rem;
}

.profile-form input[type="text"],
.profile-form input[type="email"],
.profile-form input[type="password"] {
    padding: 0.5rem;
    border: 1px solid #dbdbdb;
    border-radius: 4px;
    font-size: 1rem;
}

.profile-form button {
    margin-top: 0.5rem;
    padding: 0.6rem;
    background: #0095f6;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}

.profile-form button:hover {
    background: #007ad9;
}

.hint {
    color: #999;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal !important;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
}

@media (max-width: 600px) {
    header nav {
        flex-direction: column;
        gap: 0.5rem;
    }
}