:root{
    --bg:#f7f7f8;
    --panel:#ffffff;
    --panel2:#fbfbfc;
    --border:rgba(15, 23, 42, .12);
    --text:#0f172a;
    --muted:rgba(15, 23, 42, .62);
    --shadow:0 12px 28px rgba(2, 6, 23, .10);
    --radius:14px;
}

*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }

body{
    margin:0;
    padding:0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
    min-height:100dvh;
    background:
      radial-gradient(900px 520px at 10% 0%, rgba(15, 23, 42, .05), transparent 55%),
      radial-gradient(700px 460px at 100% 20%, rgba(15, 23, 42, .04), transparent 55%),
      linear-gradient(180deg, #ffffff 0%, var(--bg) 55%, #ffffff 100%);
    color:var(--text);
    padding-left:env(safe-area-inset-left);
    padding-right:env(safe-area-inset-right);
    overflow-x:hidden;
}
.message{
    position:fixed;
    top:0;
    left:0;
    right:0;
    padding:10px 12px;
    background:rgba(255,255,255,.92);
    color:#b91c1c;
    text-align:center;
    display:none;
    border-bottom:1px solid var(--border);
    backdrop-filter:saturate(140%) blur(10px);
    -webkit-backdrop-filter:saturate(140%) blur(10px);
    z-index:10;
}

.login-container{
    background:linear-gradient(180deg, var(--panel), var(--panel2));
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:28px;
    width:100%;
    max-width:380px;
    text-align:center;
    border:1px solid var(--border);
    margin:16px;
}

.login-container h2{
    margin:0 0 18px;
    font-size:22px;
    font-weight:650;
    letter-spacing:.2px;
}

.form-group{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    margin-bottom:18px;
}

.input-field{
    width:100%;
    padding:12px;
    margin:10px 0;
    border:1px solid var(--border);
    border-radius:10px;
    font-size:16px;
    background:rgba(255,255,255,.82);
    transition:border-color .2s ease, box-shadow .2s ease;
}

.input-field:focus{
    border-color:rgba(15, 23, 42, .40);
    outline:none;
    box-shadow:0 0 0 4px rgba(15, 23, 42, .08);
}

.btn{
    width:100%;
    padding:12px;
    background:linear-gradient(180deg, #111827, #0b1220);
    border:1px solid rgba(15, 23, 42, .25);
    border-radius:12px;
    color:#fff;
    font-size:16px;
    font-weight:650;
    cursor:pointer;
    transition:transform .18s ease, filter .18s ease, opacity .18s ease;
}

.btn:hover{
    transform:translateY(-1px);
    filter:saturate(105%);
    opacity:.98;
}

.error{
    color:#b91c1c;
    font-size:12px;
    margin-top:6px;
}

.forgot-password, label a{
    font-size:14px;
    color:var(--text);
    text-decoration:none;
    opacity:.92;
}

.forgot-password a:hover, label a:hover {
    text-decoration: underline;
}

.captcha-container {
    margin: 20px 0;
}

.captcha-btn{
    padding:9px 12px;
    font-size:14px;
    border:1px solid rgba(15, 23, 42, .28);
    border-radius:10px;
    background:rgba(255,255,255,.88);
    color:var(--text);
    cursor:pointer;
}

.captcha-btn:hover{
    background:rgba(15, 23, 42, .05);
}

.captcha-inputs {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

.captcha-inputs input{
    width:34px;
    height:42px;
    font-size:20px;
    text-align:center;
    border:1px solid var(--border);
    border-radius:10px;
    outline:none;
    background:rgba(255,255,255,.88);
}

.captcha-inputs input:focus{
    border-color:rgba(15, 23, 42, .40);
}

p{
    font-size:14px;
    color:var(--muted);
}

/* =============================
   Mobile responsiveness — login
   ============================= */

@media (max-width: 600px){
    body{
        align-items:stretch;
        padding-top:env(safe-area-inset-top);
        padding-bottom:env(safe-area-inset-bottom);
    }

    .login-container{
        margin:12px;
        padding:22px 18px;
        max-width:560px;
    }

    .captcha-inputs{
        gap:8px;
        flex-wrap:wrap;
    }
}

@media (max-width: 380px){
    .login-container h2{ font-size:20px; }
}