:root {
    /* ===== Color Palette ===== */
    --primary-color: #1E3A5F;
    --secondary-color: #284B7A;
    --accent-color: #3A6EA5;
    --hover-color: #16324F;

    --bg-color: #EEF3F8;
    --card-bg: #FFFFFF;
    --border-color: #D7E3F0;

    --text-color: #333333;
    --text-muted: #6B7280;

    --error-bg: #FFE5E5;
    --error-text: #D62828;

    --nav-height: 65px;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}


.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
}

.login-container {
    width: 100%;
    max-width: 380px;
    background: var(--card-bg);
    padding: 35px 30px;
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
    text-align: center;
}

.login-container h1 {
    color: var(--primary-color);
    font-weight: 800;
    margin-bottom: 40px;
    font-size: 30px;
    letter-spacing: 1px;
}


.navbar {
    background: var(--primary-color);
    color: white;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,.1);
}

.nav-container {
    width: 100%;
    max-width: 1100px;
    margin: auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    margin: 0;
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
}

.main-content {
    max-width: 500px;
    margin: 20px auto;
    padding: 0 15px;
    box-sizing: border-box;
}

.card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 20px rgba(0,0,0,.05);
    margin-bottom: 25px;
}

.input-group {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--border-color);
    transition: .3s;
}

.input-group:focus-within {
    border-bottom-color: var(--primary-color);
}

.input-group i {
    color: var(--primary-color);
    width: 20px;
    font-size: 18px;
    margin-right: 15px;
}

.input-group input {
    border: none;
    outline: none;
    background: none;
    width: 100%;
    padding: 12px 0;
    font-size: 16px;
    color: var(--text-color);
}

.input-group input::placeholder {
    color: #9CA3AF;
}

.btn-login {
    width: 100%;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: .3s;
}

.btn-login:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(30,58,95,.25);
}


.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid white;
    box-shadow: 0 2px 8px rgba(0,0,0,.12);
}

.avatar-small {
    width: 35px;
    height: 35px;
    border-width: 1px;
}

.logo-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #E6EEF7;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}


.error {
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid #F5B5B5;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

@media (max-width:768px){

    .main-content{
        margin:20px auto;
    }

    .card{
        padding:20px;
    }

}

@media (max-width:480px){

    .login-body{
        align-items:flex-start;
        padding-top:60px;
        background:var(--bg-color);
    }

    .login-container{
        padding:25px;
        border-radius:15px;
        box-shadow:none;
    }

    .login-container h1{
        font-size:28px;
    }

}