```css
/* ========================================
   STOCKLITE AUTHENTICATION DESIGN
   ======================================== */

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


html {
    scroll-behavior: smooth;
}


body {
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at 10% 10%, rgba(212, 175, 55, 0.10), transparent 30%),
        radial-gradient(circle at 90% 90%, rgba(212, 175, 55, 0.08), transparent 30%),
        #080808;
    color: #ffffff;
    min-height: 100vh;
}


/* ========================================
   HEADER
   ======================================== */

.auth-header {
    width: 100%;
    height: 78px;
    padding: 0 7%;
    display: flex;
    align-items: center;
    justify-content: space-between;

    background: rgba(8, 8, 8, 0.92);
    border-bottom: 1px solid rgba(212, 175, 55, 0.18);

    position: relative;
    z-index: 10;
}


.auth-logo {
    display: flex;
    align-items: center;
    gap: 10px;

    color: #ffffff;
    text-decoration: none;

    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
}


.auth-logo-mark {
    width: 38px;
    height: 38px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 11px;

    background: linear-gradient(
        135deg,
        #f4d77b,
        #c89b2c
    );

    color: #080808;
    font-size: 19px;
    font-weight: 900;

    box-shadow:
        0 8px 25px rgba(212, 175, 55, 0.20);
}


.auth-header-link {
    color: #d4af37;
    text-decoration: none;

    padding: 10px 18px;

    border: 1px solid rgba(212, 175, 55, 0.45);
    border-radius: 9px;

    font-size: 14px;
    font-weight: 700;

    transition: 0.25s ease;
}


.auth-header-link:hover {
    background: #d4af37;
    color: #080808;
}


/* ========================================
   MAIN
   ======================================== */

.auth-main {
    min-height: calc(100vh - 140px);

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 70px 6%;
}


.auth-container {
    width: 100%;
    max-width: 1120px;

    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 80px;

    align-items: center;
}


/* ========================================
   LEFT INTRO
   ======================================== */

.auth-intro {
    max-width: 560px;
}


.auth-badge {
    display: inline-block;

    padding: 8px 13px;

    border: 1px solid rgba(212, 175, 55, 0.35);
    border-radius: 50px;

    color: #d4af37;

    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.5px;

    margin-bottom: 22px;
}


.auth-intro h1 {
    font-size: clamp(42px, 5vw, 68px);
    line-height: 1.04;
    letter-spacing: -2.5px;

    margin-bottom: 25px;
}


.auth-intro h1 span {
    display: block;
    color: #d4af37;
}


.auth-intro > p {
    max-width: 520px;

    color: #a7a7a7;

    font-size: 17px;
    line-height: 1.8;

    margin-bottom: 35px;
}


/* ========================================
   BENEFITS
   ======================================== */

.auth-benefits {
    display: flex;
    flex-direction: column;
    gap: 18px;
}


.auth-benefit {
    display: flex;
    align-items: center;
    gap: 15px;
}


.benefit-icon {
    width: 36px;
    height: 36px;

    display: flex;
    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: rgba(212, 175, 55, 0.12);
    border: 1px solid rgba(212, 175, 55, 0.35);

    color: #d4af37;
    font-weight: 900;
}


.auth-benefit h3 {
    color: #ffffff;
    font-size: 15px;
    margin-bottom: 3px;
}


.auth-benefit p {
    color: #858585;
    font-size: 13px;
}


/* ========================================
   AUTH CARD
   ======================================== */

.auth-card {
    background: linear-gradient(
        145deg,
        #171717,
        #0e0e0e
    );

    border: 1px solid rgba(212, 175, 55, 0.22);

    border-radius: 24px;

    padding: 40px;

    box-shadow:
        0 25px 70px rgba(0, 0, 0, 0.55),
        0 0 0 1px rgba(255, 255, 255, 0.02);

    position: relative;
}


.auth-card::before {
    content: "";

    position: absolute;

    top: 0;
    left: 10%;
    right: 10%;

    height: 2px;

    background: linear-gradient(
        90deg,
        transparent,
        #d4af37,
        transparent
    );
}


.auth-card-header {
    margin-bottom: 30px;
}


.auth-card-icon {
    width: 50px;
    height: 50px;

    display: flex;
    align-items: center;
    justify-content: center;

    background: linear-gradient(
        135deg,
        #f4d77b,
        #c89b2c
    );

    color: #080808;

    border-radius: 14px;

    font-size: 22px;
    font-weight: 900;

    margin-bottom: 20px;

    box-shadow:
        0 10px 30px rgba(212, 175, 55, 0.18);
}


.auth-card-header h2 {
    font-size: 28px;
    margin-bottom: 8px;
}


.auth-card-header p {
    color: #888888;
    font-size: 14px;
}


/* ========================================
   FORM
   ======================================== */

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}


.auth-form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}


.auth-form-group label {
    color: #e7e7e7;
    font-size: 13px;
    font-weight: 700;
}


.auth-form-group input {
    width: 100%;

    padding: 14px 15px;

    background: #0a0a0a;

    border: 1px solid #303030;

    border-radius: 10px;

    color: #ffffff;

    font-size: 14px;

    outline: none;

    transition: 0.25s ease;
}


.auth-form-group input::placeholder {
    color: #666666;
}


.auth-form-group input:focus {
    border-color: #d4af37;

    box-shadow:
        0 0 0 3px rgba(212, 175, 55, 0.10);
}


.auth-form-group small {
    color: #707070;
    font-size: 11px;
}


/* ========================================
   BUTTONS
   ======================================== */

.auth-primary-button {
    width: 100%;

    border: none;

    padding: 15px 20px;

    border-radius: 10px;

    background: linear-gradient(
        135deg,
        #f0ce68,
        #c89b2c
    );

    color: #080808;

    font-size: 14px;
    font-weight: 800;

    cursor: pointer;

    margin-top: 4px;

    box-shadow:
        0 10px 25px rgba(212, 175, 55, 0.16);

    transition: 0.25s ease;
}


.auth-primary-button:hover {
    transform: translateY(-2px);

    box-shadow:
        0 14px 30px rgba(212, 175, 55, 0.25);
}


.auth-primary-button:active {
    transform: translateY(0);
}


.auth-secondary-button {
    display: block;

    width: 100%;

    text-align: center;

    padding: 14px 20px;

    border-radius: 10px;

    border: 1px solid #363636;

    color: #ffffff;

    text-decoration: none;

    font-size: 14px;
    font-weight: 700;

    transition: 0.25s ease;
}


.auth-secondary-button:hover {
    border-color: #d4af37;
    color: #d4af37;
}


/* ========================================
   MESSAGES
   ======================================== */

.auth-message {
    min-height: 20px;

    margin: 15px 0;

    text-align: center;

    font-size: 13px;

    line-height: 1.5;
}


/* ========================================
   DIVIDER
   ======================================== */

.auth-divider {
    display: flex;
    align-items: center;

    gap: 12px;

    margin: 8px 0 18px;

    color: #666666;

    font-size: 12px;
}


.auth-divider::before,
.auth-divider::after {
    content: "";

    flex: 1;

    height: 1px;

    background: #292929;
}


/* ========================================
   SECURITY TEXT
   ======================================== */

.auth-security {
    text-align: center;

    color: #555555;

    font-size: 11px;

    margin-top: 20px;
}


/* ========================================
   FOOTER
   ======================================== */

.auth-footer {
    text-align: center;

    padding: 25px;

    border-top: 1px solid rgba(255, 255, 255, 0.05);

    color: #555555;

    font-size: 12px;
}


/* ========================================
   MOBILE
   ======================================== */

@media (max-width: 900px) {

    .auth-container {
        grid-template-columns: 1fr;

        gap: 45px;

        max-width: 520px;
    }


    .auth-intro {
        text-align: center;
        margin: 0 auto;
    }


    .auth-intro > p {
        margin-left: auto;
        margin-right: auto;
    }


    .auth-benefits {
        text-align: left;
        max-width: 380px;
        margin: 0 auto;
    }


    .auth-main {
        padding: 55px 20px;
    }
}


@media (max-width: 600px) {

    .auth-header {
        height: 68px;
        padding: 0 20px;
    }


    .auth-logo {
        font-size: 20px;
    }


    .auth-logo-mark {
        width: 34px;
        height: 34px;
    }


    .auth-card {
        padding: 28px 22px;
        border-radius: 18px;
    }


    .auth-intro h1 {
        font-size: 40px;
        letter-spacing: -1.5px;
    }


    .auth-intro > p {
        font-size: 15px;
    }
}
```