body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(120deg,#e6f4ff,#f5fbff);
    color:#1b2b34;
}

.header {
    background: linear-gradient(90deg, #084b83, #0d6ba3);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.header nav {
    display: flex;
    gap: 30px;
}

.header nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.header nav a:hover {
    opacity: 0.8;
}

.footer {
    text-align: center;
    padding: 20px;
    background: #f0f8ff;
    border-top: 1px solid #b5d9ff;
    margin-top: 40px;
    color: #666;
}

.container {
    max-width: 900px;
    margin: auto;
    padding: 30px;
}

.nav {
    background: #cce7ff;
    padding: 15px;
    display:flex;
    gap:20px;
    justify-content:center;
}

.nav a {
    text-decoration:none;
    font-weight:bold;
    color:#084b83;
}

h1,h2,h3 { word-wrap: break-word; }

.card {
    background:white;
    padding:20px;
    margin:20px 0;
    border-radius:12px;
    box-shadow:0 4px 12px rgba(0,0,0,0.1);
    word-wrap: break-word;
}

.form {
    display:flex;
    flex-direction:column;
    gap:15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 600;
    color: #084b83;
    font-size: 15px;
}

.form-group small {
    color: #666;
    font-size: 13px;
    font-weight: 400;
}

input, textarea {
    padding:12px;
    border-radius:8px;
    border:1px solid #b5d9ff;
    font-size:16px;
}

button, .btn {
    background:#4da6ff;
    color:white;
    padding:10px 15px;
    border-radius:8px;
    text-decoration:none;
    border:none;
    cursor:pointer;
    display:inline-block;
    font-weight: 600;
    transition: background 0.2s;
}

button:hover, .btn:hover {
    background: #3a8ee6;
}

.btn-primary {
    background: linear-gradient(135deg, #4da6ff 0%, #2e7fd6 100%);
    padding: 12px 24px;
    font-size: 16px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #3a8ee6 0%, #1f5db8 100%);
}

.btn.danger { background:#ff6b6b; }

.btn.danger:hover { background: #ff5252; }

.alert {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8787 100%);
    border: none;
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 25px;
    color: white;
    font-weight: 600;
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.3);
    animation: slideDown 0.3s ease-out;
}

.error-window {
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8787 100%);
    border: 3px solid #d63031;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    animation: slideDown 0.3s ease-out;
}

.error-header {
    color: white;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.error-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.error-item {
    color: white;
    font-weight: 500;
    font-size: 16px;
    line-height: 1.4;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}