/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #047CF6;
    --secondary-color: #13E5E6;
    --neutral-color: #FFFFFF;
    --text-color: #1F2A37;
    --text-muted: #6B7280;
    --bg-gradient: linear-gradient(135deg, #047CF6 0%, #13E5E6 100%);
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--neutral-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    position: relative;
    overflow-x: hidden;
}

/* Background decorative elements */
.bg-blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: var(--bg-gradient);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
}

.bg-blob.top-left {
    top: -200px;
    left: -200px;
}

.bg-blob.bottom-right {
    bottom: -200px;
    right: -200px;
}

.container {
    width: 100%;
    max-width: 480px;
    margin: auto; /* Memastikan posisi di tengah baik vertikal maupun horizontal */
    background: rgba(19, 229, 230, 0.12); /* Biru langit sangat muda (transparan) */
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    box-shadow: 0 8px 32px rgba(4, 124, 246, 0.08); /* Shadow kebiruan lembut */
    border: 1px solid rgba(19, 229, 230, 0.4);
    text-align: center;
}

header {
    margin-bottom: 2.5rem;
}

.logo-container {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neutral-color);
    border-radius: 50%;
    box-shadow: var(--shadow-soft);
    padding: 10px;
}

.logo-container img {
    max-width: 100%;
    height: auto;
    border-radius: 50%;
}

.logo-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--bg-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.tagline {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 400;
}

main {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.btn-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--bg-gradient);
    color: var(--neutral-color);
    text-decoration: none;
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.btn-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-link:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.btn-link:hover::before {
    opacity: 1;
}

.btn-link:active {
    transform: translateY(0) scale(0.98);
}

.btn-link svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
    flex-shrink: 0;
}

footer {
    font-size: 0.85rem;
    color: var(--text-muted);
}

footer p {
    margin: 0;
}

/* Responsive adjustments */
@media (min-width: 576px) {
    .container {
        padding: 3rem;
    }
    h1 {
        font-size: 1.75rem;
    }
    .logo-container {
        width: 120px;
        height: 120px;
    }
}

/* Particles Animation */
.particle {
    position: fixed;
    bottom: -50px;
    background: var(--bg-gradient);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
    opacity: 0;
    animation: floatUp linear infinite;
    filter: blur(1px); /* Dikurangi dari 5px agar lebih jelas */
}

@keyframes floatUp {
    0% {
        transform: translateY(0) scale(1);
        opacity: 0;
    }
    10% {
        opacity: 0.7; /* Ditingkatkan dari 0.4 agar lebih terlihat */
    }
    90% {
        opacity: 0.7;
    }
    100% {
        transform: translateY(-120vh) scale(1.5);
        opacity: 0;
    }
}