/* ===== GLOBAL ===== */
body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: #0f172a; /* bleu nuit */
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

    background-image: radial-gradient(circle at top, rgba(99,102,241,0.25), transparent 60%),
                      radial-gradient(circle at bottom, rgba(56,189,248,0.2), transparent 70%);
    color: #fff;
}

/* ===== LOGIN BOX ===== */
.login-container {
    width: 340px;
    padding: 35px 28px;
    background: rgba(15, 23, 42, 0.85);   /* dark + glass effect */
    border-radius: 14px;

    box-shadow: 
        0px 0px 25px rgba(0,0,0,0.45),
        0px 0px 35px rgba(99,102,241,0.25);

    backdrop-filter: blur(6px);
    text-align: center;

    animation: fadeInScale 0.6s ease forwards;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.login-container h2 {
    margin: 0 0 20px 0;
    color: #e2e8f0;
    font-size: 22px;
    font-weight: 600;
}

/* ===== INPUT ===== */
.login-container input {
    width: 100%;
    padding: 12px;
    margin: 12px 0;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.08);
    color: #fff;
    font-size: 14px;

    transition: 0.25s;
}

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

.login-container input:focus {
    outline: none;
    border-color: #6366f1;
    background: rgba(255,255,255,0.12);
    box-shadow: 0 0 8px rgba(99,102,241,0.5);
}

/* ===== BUTTON ===== */
.login-container button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(90deg, #6366f1, #3b82f6);
    border: none;
    border-radius: 8px;
    margin-top: 10px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 15px;

    box-shadow: 0 5px 20px rgba(99,102,241,0.4);
    transition: 0.25s;
}

.login-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99,102,241,0.6);
}

/* ===== ERROR MESSAGE ===== */
#errorMsg {
    color: #f87171;
    margin-top: 12px;
    font-size: 14px;
}

.signup-link {
    display: inline-block;
    margin-top: 8px;
    color: #bfdbfe;
    font-size: 14px;
    text-decoration: none;
}

.signup-link:hover {
    color: #fff;
    text-decoration: underline;
}

.login-container input {
    box-sizing: border-box;
}