/* =====================
   THEME VARIABLES
===================== */
:root{
    --accent:#0ea5e9;      /* blue */
    --accent2:#1d4ed8;     /* dark blue */
    --accent3:#0f172a;     /* deep navy */
}

html[data-theme="dark"]{
    --bg:#020617;
    --card:rgba(255,255,255,0.08);
    --border:rgba(255,255,255,0.18);
    --text:#e5e7eb;
    --muted:#9ca3af;
}

html[data-theme="light"]{
    --bg:#f8fafc;
    --card:rgba(255,255,255,0.78);
    --border:rgba(15,23,42,0.12);
    --text:#020617;
    --muted:#64748b;
}

*{
    box-sizing:border-box;
}

::selection{
    background:rgba(14,165,233,.25);
    color:var(--text);
}

input,
textarea,
select {
    font-size:16px;
}

input,
textarea,
select,
button{
    font-family:inherit;
}

body{
    margin:0;
    min-height:100vh;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    background:
        radial-gradient(circle at top,#0f3a6b 0%,#061a3a 28%,var(--bg) 55%);
    color:var(--text);
    display:flex;
    align-items:center;
    justify-content:center;
    overflow:hidden;
}

/* =====================
   FLOATING GLASS BALLS
===================== */
.glass-ball{
    position:absolute;
    border-radius:50%;
    filter:blur(12px);
    opacity:.35;
    background:linear-gradient(135deg,var(--accent),var(--accent2));
    animation:float 20s infinite ease-in-out;
}

.ball1{
    width:220px;
    height:220px;
    top:8%;
    left:5%;
}

.ball2{
    width:160px;
    height:160px;
    bottom:12%;
    right:10%;
    animation-duration:24s;
}

.ball3{
    width:120px;
    height:120px;
    top:60%;
    left:18%;
    animation-duration:28s;
}

@keyframes float{
    0%{
        transform:translate(0,0);
    }

    50%{
        transform:translate(20px,-35px);
    }

    100%{
        transform:translate(0,0);
    }
}

/* =====================
   LOGIN CARD
===================== */
.login-card{
    position:relative;
    width:100%;
    max-width:380px;
    background:var(--card);
    border:1px solid var(--border);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-radius:18px;
    padding:1.6rem;
    box-shadow:
        0 20px 50px rgba(0,0,0,.45),
        0 0 45px rgba(14,165,233,.12);
    z-index:2;
}

/* =====================
   HEADER
===================== */
.login-header{
    text-align:center;
    margin-bottom:1.2rem;
}

.login-header h1{
    font-size:1.4rem;
    margin:0;
    color:var(--text);
}

.login-header p{
    font-size:.8rem;
    color:var(--muted);
    margin:.35rem 0 0;
}

/* =====================
   ERROR MESSAGE
===================== */
.login-error{
    background:rgba(239,68,68,.12);
    border:1px solid rgba(239,68,68,.35);
    color:#ef4444;
    padding:.55rem .7rem;
    border-radius:10px;
    font-size:.75rem;
    margin-bottom:.9rem;
}

/* =====================
   FLOATING LABEL INPUT
===================== */
.form-group{
    position:relative;
    margin-bottom:1.1rem;
}

.form-input{
    width:100%;
    padding:14px 12px;
    background:rgba(255,255,255,.03);
    border:1px solid var(--border);
    border-radius:10px;
    color:var(--text);
    font-size:.9rem;
    outline:none;
    transition:.25s ease;
    caret-color:var(--accent);
}

.form-input::placeholder{
    color:transparent;
}

.form-input:focus{
    border-color:var(--accent);
    box-shadow:0 0 0 3px rgba(14,165,233,.16);
}

.form-label{
    position:absolute;
    top:50%;
    left:12px;
    color:var(--muted);
    font-size:.8rem;
    transform:translateY(-50%);
    pointer-events:none;
    transition:.25s ease;
    padding:0 6px;
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label{
    top:-6px;
    font-size:.65rem;
    color:var(--accent);
}

/* =====================
   PASSWORD TOGGLE
===================== */
.pass-toggle{
    position:absolute;
    right:12px;
    top:50%;
    transform:translateY(-50%);
    font-size:.75rem;
    color:var(--muted);
    cursor:pointer;
    transition:.2s ease;
}

.pass-toggle:hover{
    color:var(--accent);
}

/* =====================
   REMEMBER ME
===================== */
.remember-row{
    display:flex;
    gap:.4rem;
    margin-bottom:1rem;
    justify-content:space-between;
    align-items:center;
    font-size:.75rem;
    color:var(--muted);
}

.remember-row input[type="checkbox"]{
    accent-color:var(--accent2);
}

.forgot-link{
    color:var(--accent);
    text-decoration:none;
    transition:.2s ease;
}

.forgot-link:hover{
    color:var(--accent2);
}

/* =====================
   BUTTON + SPINNER
===================== */
.login-btn{
    width:100%;
    padding:12px;
    border-radius:12px;
    border:none;
    background:linear-gradient(135deg,var(--accent),var(--accent2));
    color:#fff;
    font-size:.9rem;
    font-weight:600;
    cursor:pointer;
    position:relative;
    box-shadow:0 12px 28px rgba(29,78,216,.35);
    transition:.25s ease;
}

.login-btn:hover{
    transform:translateY(-1px);
    box-shadow:0 16px 34px rgba(29,78,216,.45);
}

.login-btn:active{
    transform:scale(.98);
}

.login-btn.loading{
    pointer-events:none;
    opacity:.8;
    color:transparent;
}

.login-btn.loading::after{
    content:"";
    width:18px;
    height:18px;
    border:2px solid rgba(255,255,255,.4);
    border-top-color:#fff;
    border-radius:50%;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    animation:spin 1s linear infinite;
}

@keyframes spin{
    from{
        transform:translate(-50%,-50%) rotate(0deg);
    }

    to{
        transform:translate(-50%,-50%) rotate(360deg);
    }
}

/* =====================
   FOOTER
===================== */
.login-footer{
    text-align:center;
    margin-top:.8rem;
    font-size:.7rem;
    color:var(--muted);
}

/* =====================
   MOBILE RESPONSIVE
===================== */
@media(max-width:480px){
    body{
        padding:1rem;
        align-items:center;
    }

    .login-card{
        max-width:100%;
        padding:1.35rem;
        border-radius:16px;
    }

    .login-header h1{
        font-size:1.25rem;
    }

    .glass-ball{
        opacity:.25;
    }

    .ball1{
        width:170px;
        height:170px;
    }

    .ball2{
        width:130px;
        height:130px;
    }

    .ball3{
        width:100px;
        height:100px;
    }
}