/* --- Core Variables Soft Premium --- */
:root {
    --bg-gradient: linear-gradient(135deg, #f0fdf4 0%, #e0f2fe 100%); /* Soft Mint to Light Sky */
    --card-bg: rgba(255, 255, 255, 0.75); /* Kaca putih semi transparan */
    --bambu-main: #10b981; /* Hijau zamrud lembut */
    --bambu-hover: #059669;
    --bambu-glow: rgba(16, 185, 129, 0.3);
    --text-main: #1e293b; /* Abu-abu kehitaman elegan */
    --text-muted: #64748b;
    --transition-fast: all 0.2s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    overflow: hidden; 
    height: 100vh;
    margin: 0;
}

/* --- Particles Background Setup --- */
#particles-js {
    position: fixed; 
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; 
}

.main-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
}

/* --- Typography --- */
.master-title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: 3.5rem;
    letter-spacing: -1.5px;
    color: #0f172a;
}

.text-bambu-grad {
    background: linear-gradient(135deg, #059669 0%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.text-subtitle {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 1rem;
    max-width: 85%;
    margin: 0 auto;
}

.text-dark-emphasis {
    color: #0f172a;
}

/* --- Logo Area --- */
.premium-logo-area {
    display: inline-flex;
    gap: 10px;
    padding: 12px 25px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 1);
    font-size: 2.5rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

/* --- Bambu Premium Card (Light Glassmorphism) --- */
.bambu-premium-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 35px;
    padding: 4rem 3rem;
    width: 100%;
    max-width: 550px; 
    margin: 0 auto;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.08); /* Bayangan lembut */
    z-index: 10;
    transform-style: preserve-3d;
}

.reveal-item, .form-area {
    transform: translateZ(30px); 
}

/* --- Input Area --- */
.moving-gradient-border {
    position: relative;
    border-radius: 15px;
    padding: 2px;
    background: #ffffff;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
}

.moving-gradient-border::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: conic-gradient(transparent, transparent, var(--bambu-main), transparent, transparent);
    animation: rotateBorder 4s linear infinite;
    opacity: 0;
    transition: opacity 0.3s;
}

.moving-gradient-border:focus-within::before {
    opacity: 1;
}

@keyframes rotateBorder {
    100% { transform: rotate(360deg); }
}

.premium-input-group {
    background: #ffffff;
    border-radius: 13px;
    position: relative;
    z-index: 1;
}

.premium-input-group .input-group-text {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding-left: 20px;
}

.premium-input-group .form-control {
    background: transparent !important;
    border: none !important;
    color: var(--text-main) !important;
    font-family: 'Poppins', sans-serif;
    padding: 15px;
    font-size: 0.95rem;
}

.premium-input-group .form-control::placeholder {
    color: #cbd5e1;
}

.premium-input-group .form-control:focus {
    box-shadow: none !important;
}

/* --- Buttons --- */
.btn-bambu-action {
    border-radius: 12px;
    padding: 14px;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
}

.btn-bambu-action:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 25px var(--bambu-glow);
}

.btn-bambu-action .icon-anim {
    transition: var(--transition-fast);
}

.btn-bambu-action:hover .icon-anim {
    transform: scale(1.2) rotate(-10deg);
}

/* Tombol Buat QR (Gaya Putih) */
.btn-qr {
    background: #ffffff;
    color: var(--bambu-main);
    border: 2px solid var(--bambu-main);
}

.btn-qr:hover {
    background: var(--bambu-main);
    color: #ffffff;
}

/* Tombol Pendekkan (Gaya Hijau Utama) */
.btn-shorten {
    background: linear-gradient(135deg, var(--bambu-main), var(--bambu-hover));
    color: #ffffff;
    border: none;
}

.btn-shorten:hover {
    color: #ffffff;
}

/* --- Area Hasil --- */
.result-box {
    animation: scaleInResult 0.5s cubic-bezier(0.23, 1, 0.32, 1) forwards;
    transform-origin: top center;
}

@keyframes scaleInResult {
    0% { opacity: 0; transform: scaleY(0); }
    100% { opacity: 1; transform: scaleY(1); }
}

.qr-frame {
    background: #ffffff;
    padding: 15px;
    border-radius: 20px;
    display: inline-block;
    box-shadow: 0 15px 30px rgba(0,0,0,0.08);
    border: 3px solid var(--bambu-main);
}

.btn-outline-bambu {
    background: transparent;
    border: 2px solid var(--bambu-main);
    color: var(--bambu-main);
    border-radius: 10px;
    font-weight: 600;
}

.btn-outline-bambu:hover {
    background: var(--bambu-main);
    color: #ffffff;
}

.btn-salin {
    background: var(--bambu-main);
    color: #ffffff;
    border: none;
    font-size: 1.2rem;
    padding: 0 25px;
    border-radius: 0 13px 13px 0;
}
.btn-salin:hover {
    background: var(--bambu-hover);
}

/* --- Animasi Masuk (Reveal) --- */
.reveal-item {
    opacity: 0;
    transform: translateY(20px);
    animation: revealEffect 0.8s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes revealEffect {
    to { opacity: 1; transform: translateY(0); }
}

/* --- Footer --- */
.footer-divider {
    border-top: 1px solid rgba(0,0,0,0.08);
}
.premium-footer-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* --- Responsiveness --- */
@media (max-width: 768px) {
    .master-title { font-size: 2.5rem; }
    .bambu-premium-card { padding: 2.5rem 1.5rem; border-radius: 25px; }
    .premium-logo-area { font-size: 1.8rem; }
}