* {
    box-sizing: border-box;
}

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

body {
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    background: linear-gradient( 135deg, #eef6ff 0%, #f8fbff 55%, #edf7ff 100% );
    color: #0f172a;
}


/* ================================
   KHUNG TRANG
================================ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
}


/* QUAN TRỌNG:
   chỉnh độ rộng form ở đây */
.auth-container {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
}


/* nếu còn giao diện cũ có phần bên trái */
.auth-brand-panel {
    display: none;
}


.auth-form-panel {
    width: 100%;
    background: #ffffff;
    border: 1px solid #dbe7f3;
    border-radius: 22px;
    box-shadow: 0 18px 50px rgba(15, 23, 42, 0.10);
    overflow: hidden;
}


.auth-form-wrapper {
    width: 100%;
    padding: 32px 34px 30px;
    margin: 0 auto;
}


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

.auth-form-header {
    margin-bottom: 24px;
    text-align: center;
}


    .auth-form-header h2 {
        margin: 0 0 8px 0;
        color: #0f172a;
        font-size: 30px;
        font-weight: 800;
    }


    .auth-form-header p {
        margin: 0 auto;
        max-width: 390px;
        color: #64748b;
        font-size: 14px;
        line-height: 1.6;
    }


/* ================================
   LOGO
================================ */

.login-brand {
    margin-bottom: 22px;
    text-align: center;
}


.login-logo {
    display: block;
    width: 230px;
    max-width: 78%;
    height: auto;
    margin: 0 auto 10px auto;
    object-fit: contain;
}


.login-brand-name {
    margin: 0;
    color: #2563eb;
    font-size: 28px;
    font-weight: 800;
}


.login-brand-desc {
    margin: 7px 0 0 0;
    color: #64748b;
    font-size: 13px;
}


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

.auth-form-group {
    margin-bottom: 16px;
}


    .auth-form-group label {
        display: block;
        margin-bottom: 7px;
        color: #1e293b;
        font-size: 14px;
        font-weight: 700;
    }


.required {
    color: #ef4444;
}


.password-wrapper {
    position: relative;
}


/* ================================
   INPUT
================================ */

.auth-input {
    width: 100%;
    height: 48px;
    padding: 0 14px;
    border: 1px solid #cbd5e1;
    border-radius: 11px;
    background: #f8fbff;
    color: #0f172a;
    font-size: 15px;
    outline: none;
}


    .auth-input:focus {
        border-color: #3b82f6;
        background: #ffffff;
        box-shadow: 0 0 0 3px rgba(59, 130, 246, .11);
    }


    .auth-input::placeholder {
        color: #94a3b8;
    }


.auth-help {
    display: block;
    margin-top: 6px;
    color: #64748b;
    font-size: 12px;
}


/* ================================
   BUTTON
================================ */

.auth-button {
    width: 100%;
    min-height: 48px;
    margin-top: 5px;
    padding: 10px 16px;
    border: 0;
    border-radius: 11px;
    background: linear-gradient( 135deg, #0ea5e9, #2563eb );
    color: #ffffff;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
}


    .auth-button:hover {
        box-shadow: 0 10px 22px rgba(37, 99, 235, .22);
    }


/* ================================
   MESSAGE
================================ */

.auth-message {
    display: block;
    width: 100%;
    margin-bottom: 14px;
    border-radius: 10px;
    font-size: 13px;
}


.auth-error {
    padding: 10px 12px;
    border: 1px solid #fecaca;
    background: #fef2f2;
    color: #b91c1c;
}


.auth-success {
    padding: 10px 12px;
    border: 1px solid #bbf7d0;
    background: #f0fdf4;
    color: #15803d;
}


/* ================================
   GHI CHÚ
================================ */

.login-note,
.register-notice {
    margin-top: 16px;
    padding: 11px 13px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    background: #f8fafc;
    color: #64748b;
    font-size: 12px;
    line-height: 1.55;
}


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

.auth-footer,
.login-register {
    margin-top: 18px;
    text-align: center;
    color: #64748b;
    font-size: 13px;
}


    .auth-footer a,
    .login-register a {
        color: #2563eb;
        font-weight: 700;
        text-decoration: none;
    }


        .auth-footer a:hover,
        .login-register a:hover {
            text-decoration: underline;
        }


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

@media (max-width: 600px) {

    .auth-page {
        padding: 18px 12px;
        align-items: flex-start;
    }


    .auth-container {
        max-width: 100%;
    }


    .auth-form-panel {
        border-radius: 17px;
    }


    .auth-form-wrapper {
        padding: 26px 20px 24px;
    }


    .auth-form-header h2 {
        font-size: 26px;
    }


    .login-logo {
        width: 205px;
    }


    .auth-input {
        height: 46px;
        font-size: 14px;
    }


    .auth-button {
        min-height: 46px;
        font-size: 15px;
    }
}