/* Reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Base */
body {
    font-family: "IRANSans", Tahoma, sans-serif;
    background: linear-gradient(135deg, #eef2f7, #dbeafe);
    min-height: 100vh;
    color: #1f2937;
}

/* Navbar */
nav {
    background: #0f172a;
    color: #fff;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

nav h2 {
    font-size: 18px;
    font-weight: 600;
}

nav a {
    color: #93c5fd;
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
}

nav a:hover {
    color: #fff;
}

/* Main Card */
.container {
    max-width: 420px;
    background: #fff;
    margin: 80px auto;
    padding: 36px 32px;
    border-radius: 18px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
    text-align: center;
}

/* Titles */
.container h1 {
    font-size: 22px;
    margin-bottom: 10px;
}

.container h2 {
    font-size: 20px;
    margin-bottom: 12px;
}

.desc {
    font-size: 14px;
    color: #64748b;
    margin-bottom: 28px;
    line-height: 1.8;
}

/* Form */
form {
    margin-top: 20px;
}

input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid #cbd5f5;
    font-size: 14px;
    margin-bottom: 16px;
    transition: 0.3s;
}

input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Buttons */
button,
.pay-btn {
    width: 100%;
    padding: 14px;
    border-radius: 14px;
    border: none;
    font-size: 15px;
    font-weight: 500;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    cursor: pointer;
    transition: 0.3s;
    text-decoration: none;
    display: inline-block;
}

button:hover,
.pay-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(37, 99, 235, 0.35);
}

/* Success Code */
.code {
    margin-top: 18px;
    background: #f1f5f9;
    border: 2px dashed #2563eb;
    padding: 16px;
    border-radius: 14px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #1d4ed8;
}

/* Admin */
.center {
    text-align: center;
    margin: 40px 0 20px;
}

.admin-list {
    max-width: 900px;
    margin: auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    border-right: 5px solid #2563eb;
}

.card p {
    font-size: 15px;
    margin-bottom: 8px;
}

.card span {
    font-size: 14px;
    color: #475569;
    background: #e0e7ff;
    padding: 6px 10px;
    border-radius: 10px;
    display: inline-block;
}

/* Login */
.login {
    max-width: 360px;
    margin: 120px auto;
    background: #fff;
    padding: 32px;
    border-radius: 18px;
    box-shadow: 0 18px 35px rgba(0,0,0,0.12);
}

.login h2 {
    text-align: center;
    margin-bottom: 24px;
}
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 50px;
}
@media (max-width: 768px) {

    nav {
        padding: 14px 18px;
    }

    nav h2 {
        font-size: 16px;
    }

    nav a {
        font-size: 13px;
    }

    .container {
        margin: 40px 16px;
        padding: 28px 22px;
        border-radius: 16px;
    }

    .container h1 {
        font-size: 19px;
    }

    .container h2 {
        font-size: 18px;
    }

    .desc {
        font-size: 13px;
        margin-bottom: 22px;
    }

    input {
        padding: 13px 14px;
        font-size: 14px;
    }

    button,
    .pay-btn {
        padding: 13px;
        font-size: 14px;
        border-radius: 12px;
    }

    .code {
        font-size: 20px;
        padding: 14px;
    }

    .admin-list {
        grid-template-columns: 1fr;
        padding: 16px;
    }

    .card {
        padding: 18px;
        border-radius: 14px;
    }

    .login {
        margin: 80px 16px;
        padding: 26px;
        border-radius: 16px;
    }
}