/* ===========================
   Global Reset
   =========================== */

/* সব এলিমেন্টের ডিফল্ট Margin ও Padding সরানো */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

/* পুরো ওয়েবসাইটের Body */
body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f4f7fb;
}

/* ===========================
   Header
   =========================== */

header{
    background:#0d47a1;
    color:white;

    display:flex;
    justify-content:space-between;
    align-items:center;

    padding:20px 60px;
}

/* Logo */
header h2{
    font-size:28px;
}

/* Menu */
nav a{

    color:white;

    text-decoration:none;

    margin-left:20px;

    font-size:17px;

    transition:.3s;

}

/* Mouse নিলে রঙ বদলাবে */
nav a:hover{

    color:#FFD54F;

}

/* ===========================
   Hero Section
   =========================== */

section{

    text-align:center;

    padding:120px 20px;

}

/* বড় শিরোনাম */
section h1{

    font-size:50px;

    color:#0d47a1;

}

/* Description */
section p{

    margin-top:20px;

    font-size:20px;

    color:#555;

}

/* Button */
button{

    margin-top:30px;

    background:#0d47a1;

    color:white;

    border:none;

    padding:15px 40px;

    font-size:18px;

    border-radius:6px;

    cursor:pointer;

}

/* Hover Effect */
button:hover{

    background:#1565C0;

}







/* Navbar Logo */
.navbar-brand{
    font-size:28px;
}

/* Menu */
.nav-link{
    font-weight:600;
    margin-left:10px;
}

/* Button */
.btn{
    border-radius:10px;
}


/* =====================================
   Global Style
===================================== */

body{
    font-family:'Poppins', sans-serif;
    background:#f8f9fa;
}

/* Logo */

.navbar-brand{

    font-size:28px;
    font-weight:700;

}

/* Menu */

.nav-link{

    font-weight:500;
    margin-left:12px;

}

.nav-link:hover{

    color:#0d6efd;

}

/* Button */

.btn{

    border-radius:10px;
    padding:10px 22px;

}




/* ==========================================
   Mobile Responsive
========================================== */

/* Tablet (992px এর নিচে) */
@media (max-width: 991.98px) {

    .hero-section {
        padding: 70px 0;
        text-align: center;
    }

    .hero-section h1 {
        font-size: 42px;
    }

    .hero-section p {
        font-size: 18px;
    }

    .hero-section img {
        margin-top: 40px;
        max-width: 90%;
    }

    .navbar-brand {
        font-size: 24px;
    }

    .btn {
        padding: 10px 20px;
    }
}

/* Mobile (768px এর নিচে) */
@media (max-width: 767.98px) {

    .hero-section {
        padding: 50px 15px;
    }

    .hero-section h1 {
        font-size: 32px;
    }

    .hero-section p {
        font-size: 16px;
    }

    .display-4 {
        font-size: 2.2rem !important;
    }

    .hero-section .btn {
        width: 100%;
        margin-bottom: 12px;
    }

    .hero-section .btn:last-child {
        margin-bottom: 0;
    }

    .navbar-brand {
        font-size: 20px;
    }

    .nav-link {
        margin-left: 0;
        padding: 10px 0;
        text-align: center;
    }

    .hero-section img {
        max-width: 100%;
        margin-top: 30px;
    }
}












/* ==========================================
   Smooth Animation
========================================== */

/* সব Button-এর জন্য */
.btn{
    transition: all .3s ease;
}

/* Hover করলে */
.btn:hover{
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(13,110,253,.25);
}

/* Navbar Menu */
.nav-link{
    position: relative;
    transition: color .3s ease;
}

/* নিচে নীল লাইন */
.nav-link::after{

    content:"";

    position:absolute;

    left:0;

    bottom:-4px;

    width:0;

    height:2px;

    background:#0d6efd;

    transition:.3s;

}

/* Hover */
.nav-link:hover::after{

    width:100%;

}

/* Hero Image */
.hero-section img{

    transition:.4s ease;

}

/* Hover করলে */
.hero-section img:hover{

    transform:scale(1.03);

}

/* Card Hover (ভবিষ্যতে ব্যবহার হবে) */
.feature-card{

    transition:.35s ease;

}

.feature-card:hover{

    transform:translateY(-8px);

    box-shadow:0 15px 35px rgba(0,0,0,.12);

}








```css
/* ===========================
   LOGIN PAGE
=========================== */


/* =========================
   Google Font
========================= */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:'Poppins',sans-serif;
}

body{

background:#071226;
overflow-x:hidden;

}

/* =========================
Background
========================= */

.bg-animation{

position:fixed;

top:0;
left:0;

width:100%;
height:100%;

overflow:hidden;

z-index:-1;

background:
linear-gradient(135deg,#071226,#0b2b5a,#0e7490);

background-size:300% 300%;

animation:bgMove 15s infinite;

}

@keyframes bgMove{

0%{

background-position:0% 50%;

}

50%{

background-position:100% 50%;

}

100%{

background-position:0% 50%;

}

}

/* =========================
Floating Circle
========================= */

.circle{

position:absolute;

border-radius:50%;

filter:blur(30px);

opacity:.35;

animation:float 10s infinite ease-in-out;

}

.c1{

width:260px;
height:260px;

background:#38bdf8;

top:-80px;

left:-80px;

}

.c2{

width:300px;
height:300px;

background:#2563eb;

right:-100px;

bottom:-100px;

animation-delay:2s;

}

.c3{

width:180px;
height:180px;

background:#06b6d4;

left:45%;

top:40%;

animation-delay:4s;

}

@keyframes float{

0%{

transform:translateY(0);

}

50%{

transform:translateY(-40px);

}

100%{

transform:translateY(0);

}

}

/* =========================
Section
========================= */

.login-section{

min-height:100vh;

display:flex;

align-items:center;

padding:40px 0;

}

/* =========================
Left Side
========================= */

.logo{

font-size:30px;

font-weight:700;

color:#fff;

margin-bottom:30px;

}

.left-content h1{

font-size:60px;

font-weight:800;

color:#fff;

line-height:1.1;

margin-bottom:20px;

}

.left-content p{

font-size:18px;

color:#d6e7ff;

max-width:480px;

}

.feature{

margin-top:40px;

}

.feature div{

display:flex;

align-items:center;

gap:15px;

margin-bottom:20px;

color:#fff;

font-size:18px;

}

.feature i{

font-size:26px;

color:#38bdf8;

}



/* ===========================
   LOGIN CARD
=========================== */

.login-card{

    background:rgba(255,255,255,.12);

    backdrop-filter:blur(25px);

    -webkit-backdrop-filter:blur(25px);

    border:1px solid rgba(255,255,255,.18);

    border-radius:28px;

    padding:45px;

    box-shadow:
    0 25px 60px rgba(0,0,0,.35);

    transition:.4s;

}

.login-card:hover{

    transform:translateY(-8px);

    box-shadow:
    0 35px 80px rgba(0,0,0,.45);

}

.login-card h2{

    color:#fff;

    font-size:34px;

    font-weight:700;

    margin-bottom:8px;

}

.login-card p{

    color:#cbd5e1;

    margin-bottom:30px;

}

/* ===========================
LABEL
=========================== */

label{

    display:block;

    color:#fff;

    font-size:15px;

    margin-bottom:10px;

    font-weight:500;

}

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

.phone-input{

    display:flex;

    gap:12px;

    margin-bottom:20px;

}

.phone-input select{

    width:120px;

    height:58px;

    border:none;

    outline:none;

    border-radius:14px;

    padding:0 12px;

    background:#fff;

}

.phone-input input{

    flex:1;

    height:58px;

    border:none;

    outline:none;

    border-radius:14px;

    padding:0 18px;

    font-size:16px;

    background:#fff;

}

/* ===========================
PASSWORD
=========================== */

.password-box{

    display:flex;

    align-items:center;

    background:#fff;

    border-radius:14px;

    overflow:hidden;

    margin-bottom:20px;

}

.password-box input{

    flex:1;

    height:58px;

    border:none;

    outline:none;

    padding:0 18px;

    font-size:16px;

}

.password-box button{

    width:60px;

    height:58px;

    border:none;

    background:#fff;

    cursor:pointer;

    font-size:22px;

}

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

.login-btn{

    width:100%;

    height:60px;

    border:none;

    border-radius:16px;

    background:linear-gradient(90deg,#2563eb,#06b6d4);

    color:#fff;

    font-size:18px;

    font-weight:700;

    cursor:pointer;

    transition:.35s;

}

.login-btn:hover{

    transform:translateY(-4px);

    box-shadow:

    0 20px 40px rgba(37,99,235,.45);

}

/* ===========================
DIVIDER
=========================== */

.divider{

    position:relative;

    text-align:center;

    margin:30px 0;

    color:#fff;

}

.divider::before{

    content:"";

    position:absolute;

    left:0;

    top:50%;

    width:42%;

    height:1px;

    background:rgba(255,255,255,.2);

}

.divider::after{

    content:"";

    position:absolute;

    right:0;

    top:50%;

    width:42%;

    height:1px;

    background:rgba(255,255,255,.2);

}

/* ===========================
SOCIAL
=========================== */

.social-login{

    display:flex;

    gap:15px;

}

.social-login button{

    flex:1;

    height:55px;

    border:none;

    border-radius:14px;

    cursor:pointer;

    font-weight:600;

    transition:.3s;

}

.google{

    background:#fff;

}

.facebook{

    background:#1877f2;

    color:#fff;

}

.social-login button:hover{

    transform:translateY(-4px);

}

.register{

    text-align:center;

    margin-top:30px;

    color:#fff;

}

.register a{

    color:#38bdf8;

    text-decoration:none;

    font-weight:600;

}




/* ======================================
   PREMIUM ANIMATION
====================================== */

.login-card{

animation:cardShow .8s ease;

}

@keyframes cardShow{

0%{

opacity:0;

transform:translateY(40px) scale(.95);

}

100%{

opacity:1;

transform:translateY(0) scale(1);

}

}

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

.phone-input input,
.phone-input select,
.password-box{

transition:.35s;

}

.phone-input input:focus,
.phone-input select:focus{

box-shadow:

0 0 0 4px rgba(59,130,246,.18);

transform:translateY(-2px);

}

.password-box:focus-within{

box-shadow:

0 0 0 4px rgba(59,130,246,.18);

transform:translateY(-2px);

}

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

.login-btn{

position:relative;

overflow:hidden;

}

.login-btn::before{

content:"";

position:absolute;

top:0;

left:-120%;

width:70%;

height:100%;

background:

linear-gradient(

90deg,

transparent,

rgba(255,255,255,.45),

transparent

);

transition:.7s;

}

.login-btn:hover::before{

left:150%;

}

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

.social-login button{

transition:.35s;

}

.social-login button:hover{

transform:translateY(-5px);

box-shadow:

0 15px 35px rgba(0,0,0,.18);

}

/* ==============================
LINK
============================== */

a{

transition:.3s;

}

a:hover{

opacity:.8;

}

/* ==============================
SCROLLBAR
============================== */

::-webkit-scrollbar{

width:8px;

}

::-webkit-scrollbar-thumb{

background:#2563eb;

border-radius:20px;

}

::-webkit-scrollbar-track{

background:#071226;

}

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

@media(max-width:991px){

.left-content{

display:none;

}

.login-section{

padding:20px;

}

.login-card{

padding:28px;

border-radius:22px;

}

.phone-input{

flex-direction:column;

}

.phone-input select{

width:100%;

}

.login-card h2{

font-size:28px;

}

}

@media(max-width:576px){

.login-card{

padding:22px;

}

.login-btn{

height:54px;

font-size:16px;

}

.password-box input,

.phone-input input,

.phone-input select{

height:52px;

font-size:15px;

}

.social-login{

flex-direction:column;

gap:12px;

}

}

/* ==============================
FLOATING GLOW
============================== */

.login-card::after{

content:"";

position:absolute;

top:-80px;

right:-80px;

width:180px;

height:180px;

background:rgba(255,255,255,.08);

border-radius:50%;

filter:blur(20px);

pointer-events:none;

}

.login-card{

position:relative;

overflow:hidden;

}