:root{
    /* фирменная палитра */
    --white: #FFFFFF;
    --black: #000000;
    --blue: #006FFD;
    --green: #22C55E;
    --red: #FF3D32;
    --yellow: #EAB308;
    --grey: #8F9098;

    --light-100: #FCFDFE;
    --light-200: #F8F9FA;
    --light-300: #EAF2FF;

    --dark-100: #1E1E1E;
    --dark-200: #2A2A2A;
    --dark-300: #3C3C3C;
    --dark-400: #505050;

    --lg-100: #C5C6CC;
    --lg-200: #D9D9D9;
    --lg-300: #E6E6E6;
    --lg-400: #F0F0F0;

    --radius: 16px;
    --shadow: 0 8px 24px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body.auth {
    margin: 0;
    font-family: system-ui, -apple-system, "Inter", Segoe UI, Roboto, Arial, sans-serif;
    background: radial-gradient(1200px 1200px at 80% -100%, #EAF2FF 0%, transparent 70%) var(--light-100);
    color: var(--dark-100);
}

.auth__container{
    min-height: 100%;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card{
    width: 100%;
    max-width: 520px;
    background: var(--white);
    border: 1px solid var(--lg-400);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px 28px;
    text-align: center;
}

.auth-card__logo{
    width: 88px;
    height: 88px;
    margin: 8px auto 20px;
}

.auth-card__title{
    margin: 0 0 10px;
    font-weight: 700;
    font-size: 28px;
    line-height: 1.2;
    color: #5B8BFF; /* мягкий сине-электрический заголовок */
}

.auth-card__subtitle{
    margin: 0 auto 24px;
    color: var(--grey);
    font-size: 15px;
    max-width: 34ch;
}

.auth-form{ text-align: left; }

.field{ margin-bottom: 16px; }
.field__label{
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--dark-300);
}
.field__input{
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--lg-300);
    border-radius: 10px;
    background: var(--light-100);
    color: var(--dark-100);
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.field__input:focus{
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(0,111,253,.12);
}

.form-errors{
    margin: 8px 0 12px;
}
.form-errors__item{
    background: #FFF2F2;
    color: #B00020;
    border: 1px solid #F9D3D3;
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 14px;
}

.btn{
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: 0;
    transition: transform .05s ease, background-color .15s ease, color .15s ease;
}
.btn:active{ transform: translateY(1px); }

.btn--primary{
    background: var(--blue);
    color: #fff;
}
.btn--primary:hover{ background: #0059CC; }

.btn--outline{
    background: #fff;
    color: var(--blue);
    border: 2px solid var(--blue);
}
.btn--outline:hover{ background: var(--light-300); }

.btn--vk{
    background: #0077FF;
    color: #fff;
    margin-top: 10px;
}
.btn--vk:hover{ background: #0059C8; }

.auth-card__links{
    margin-top: 14px;
    display: grid;
    gap: 10px;
}
.auth-card__link{
    display: inline-block;
    margin-top: 4px;
    color: var(--grey);
    font-size: 14px;
    text-align: center;
}
.auth-card__link:hover{ color: var(--dark-200); }