html {
    font-size: 16px;
}
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f7fb;
    color: #222;
}
img,
video {
    max-width: 100%;
    height: auto;
}
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}
.site-header {
    background: #0f2748;
    color: #fff;
}
.header-inner {
    min-height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.site-logo {
    color: #fff;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}
.site-nav {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}
.site-nav a,
.user-name {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
}
.page-main {
    min-height: calc(100vh - 9rem);
}
.simple-page {
    padding: 2rem 0;
}
.auth-wrap {
    min-height: calc(100vh - 9rem);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}
.auth-card {
    width: 100%;
    max-width: 32rem;
    background: #fff;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 0.5rem 2rem rgba(0,0,0,0.08);
}
.auth-tabs {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.auth-tabs button {
    border: none;
    background: #e8eef8;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    cursor: pointer;
    font-size: 1rem;
}
.auth-tabs button.active {
    background: #1f4f95;
    color: #fff;
}
.auth-form {
    display: none;
}
.auth-form.active {
    display: block;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}
label {
    font-size: 0.95rem;
    font-weight: 700;
}
input {
    padding: 0.85rem 1rem;
    border: 1px solid #cfd8e3;
    border-radius: 0.75rem;
    font-size: 1rem;
    width: 100%;
    box-sizing: border-box;
}
.btn,
.btn-inline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    border: none;
    background: #1f4f95;
    color: #fff;
    padding: 0.95rem 1rem;
    border-radius: 0.75rem;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    box-sizing: border-box;
}
.msg {
    margin-top: 0;
    margin-bottom: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.75rem;
    display: none;
}
.msg.success {
    display: block;
    background: #e9f8ee;
    color: #17643b;
}
.msg.error {
    display: block;
    background: #fdecec;
    color: #9b1d1d;
}
.profile-box {
    background: #fff;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 0.5rem 2rem rgba(0,0,0,0.06);
    margin-bottom: 1rem;
}
.site-footer {
    background: #0f2748;
    color: #fff;
    padding: 1rem 0;
}
@media (min-width: 600px) and (max-width: 899px) {
    .auth-card {
        max-width: 36rem;
    }
}
@media (min-width: 900px) and (max-width: 1199px) {
    .auth-card {
        max-width: 38rem;
    }
}
@media (min-width: 1200px) and (max-width: 1599px) {
    .auth-card {
        max-width: 40rem;
    }
}
@media (min-width: 1600px) {
    html {
        font-size: 17px;
    }
    .auth-card {
        max-width: 42rem;
    }
}