body {
    margin: 0;
    padding: 0;
    background: #f7f9fb;
    min-height: 100vh;
    font-family: 'Kanit', 'Segoe UI', Arial, sans-serif;
}

.navbar {
    width: 100%;
    background: #fff;
    box-shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.04);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
}

.navbar .brand {
    font-size: 1.35rem;
    font-weight: 500;
    color: #2d3a4a;
    letter-spacing: 0.5px;
}

.navbar .nav-link {
    color: #2d3a4a;
    font-size: 1rem;
    text-decoration: none;
    font-weight: 400;
    transition: color 0.2s;
}

.navbar .nav-link:hover {
    color: #1976d2;
}

.center-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 32px 0 rgba(60, 72, 88, 0.10);
    padding: 40px 32px 32px 32px;
    width: 100%;
    max-width: 400px;
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-card .logo {
    width: 80px;
}

.login-card .title {
    font-size: 1.5rem;
    font-weight: 500;
    color: #2d3a4a;
    margin-bottom: 4px;
    text-align: center;
}

.login-card .subtitle {
    font-size: 1rem;
    color: #6c757d;
    margin-bottom: 16px;
    text-align: center;
}

.login-card form {
    width: 100%;
}

.login-card label {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 4px;
    margin-top: 12px;
    display: block;
    font-weight: 500;
}

.login-card .input-group {
    position: relative;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
}

.login-card .input-group input[type="password"],
.login-card .input-group input[type="text"],
.login-card .input-group input[type="email"] {
    width: 100%;
    padding: 10px 12px 10px 38px;
    border: 1px solid #dbe2ea;
    border-radius: 5px;
    font-size: 1rem;
    background: #f7f9fb;
    color: #2d3a4a;
    transition: border 0.2s;
    outline: none;
    font-family: 'Kanit', 'Segoe UI', Arial, sans-serif;
}

.login-card .input-group i.fas.fa-user,
.login-card .input-group i.fas.fa-lock,
.login-card .input-group i.fas.fa-envelope {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #b0b8c1;
    font-size: 1rem;
    pointer-events: none;
}

.login-card .input-group .password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #b0b8c1;
    font-size: 1rem;
    cursor: pointer;
    z-index: 2;
}

.login-card .register-btn {
    width: auto;
    min-width: 100px;
    float: right;
    display: block;
    margin-left: auto;
    margin-top: 8px;
    background: #4285f4;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 28px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.login-card .register-btn:hover {
    background: #1976d2;
}

.login-card .error {
    background: #fdeaea;
    color: #d32f2f;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 12px;
    text-align: center;
    font-size: 0.95rem;
    width: 100%;
}

.login-card .note {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 12px;
    text-align: left;
}

.login-card .footer-text {
    font-size: 0.85rem;
    color: #6c757d;
    text-align: center;
    margin-top: 12px;
}

.login-card .footer-text a {
    color: #4285f4;
    text-decoration: none;
}

.login-card .footer-text a:hover {
    color: #1976d2;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .navbar {
        padding: 0 16px;
    }

    .login-card {
        padding: 28px 8px 24px 8px;
    }
}

/* ...existing code... */

.modal {
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: #fff;
    border-radius: 10px;
    padding: 24px 28px 18px 28px;
    max-width: 1080px;
    width: 95vw;
    position: relative;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
    overflow-y: auto;
    max-height: 90vh;
}

.close {
    position: absolute;
    right: 18px;
    top: 12px;
    font-size: 1.7rem;
    color: #888;
    cursor: pointer;
}

.close:hover {
    color: #d32f2f;
}

/* Responsive for modal */
@media (max-width: 900px) {
    .modal-content {
        max-width: 95vw;
        padding: 18px 8px 14px 8px;
    }
}

@media (max-width: 600px) {
    .modal-content {
        max-width: 99vw;
        width: 99vw;
        padding: 10px 2vw 10px 2vw;
        font-size: 0.98rem;
    }
    .close {
        right: 8px;
        top: 8px;
        font-size: 1.3rem;
    }
}