* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* 🔹 Login Card */
.login-card {
    background: #ffffff;
    padding: 40px 35px;
    width: 100%;
    max-width: 400px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
    text-align: center;
    position: relative;
}

/* 🔹 Logo */
.login-card img.logo {
    width: 120px;
    margin-bottom: 20px;
}

/* 🔹 Heading */
.login-card h2 {
    margin-bottom: 25px;
    font-weight: 600;
    color: #0f172a;
}

/* 🔹 Form wrapper */
.login-card form {
    width: 100%;
}

/* 🔹 Email / Password / OTP input */
.login-card input[type="email"],
.login-card input[type="password"],
.login-card input[name="otp"] {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 18px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.25s ease;
    text-align: left;
}

/* 🔹 OTP specific styling */
.login-card input[name="otp"] {
    text-align: center;
    letter-spacing: 6px;
    font-size: 20px;
    font-weight: 600;
    height: 52px;
}

/* 🔹 Focus effect */
.login-card input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
    outline: none;
}

/* 🔹 Button */
.login-card button {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 8px;
    background: #2563eb;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.login-card button:hover {
    background: #1d4ed8;
}

/* 🔹 Error message */
.error {
    color: #ef4444;
    margin-bottom: 15px;
    font-size: 14px;
}

/* 🔹 Mobile Fix */
@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
    }

    .login-card input[name="otp"] {
        font-size: 18px;
        letter-spacing: 4px;
    }
}