:root {
    --biru: #667eea;
    --ungu: #764ba2;
    --putih-gelap: #e2e8f0;
    --putih-cerah: #f8fafc;
    --abu-gelap: #2d3748;
    --abu-sedang: #4a5568;
    --biru-terang: #3b82f6;
    --ungu-terang: #4f46e5;
    --putih: #ffffff;
    --hitam-transparan: rgba(0, 0, 0, 0.1);
    --biru-gelap: #2b6cb0;
    --ungu-transparan: rgba(79, 70, 229, 0.2);
    --putih-transparan: rgba(255, 255, 255, 0.95);
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.logo-container {
    text-align: center;
}

.logo-container img {
    max-width: 180px;
    width: 100%;
    height: auto;
    margin-bottom: 0.5rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.page-container {
    background: var(--putih-transparan);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--hitam-transparan);
    width: 100%;
    max-width: 400px;
    height: fit-content;
    backdrop-filter: blur(10px);
    flex: 1;
    text-align: center;
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    /* background: linear-gradient(135deg, var(--biru) 0%, var(--ungu) 100%); */
    background: linear-gradient(to right, var(--biru-terang) 0%, var(--biru) 50%, var(--biru-terang) 100%);
    color: var(--putih);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--ungu-transparan);
}

a {
    text-decoration: none;
}