:root {
    --primary-green: #1E5631;
    --primary-gold: #F4C430;
    --bg-cream: #F9F9F6;
    --text-dark: #2C3E50;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-cream);
    color: var(--text-dark);
    overflow-x: hidden;
}

.glass-nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(30, 86, 49, 0.1);
}

.hero-gradient {
    background: linear-gradient(135deg, rgba(30, 86, 49, 0.95) 0%, rgba(45, 90, 39, 0.85) 100%),
                url('https://images.unsplash.com/photo-1586771107445-d3ca888129ff?q=80&w=1600&auto=format&fit=crop') center/cover no-repeat;
}

.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.card-hover:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px -10px rgba(30, 86, 49, 0.15);
}

.btn-gold {
    background-color: var(--primary-gold);
    color: #1A252C;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 4px 14px rgba(244, 196, 48, 0.35);
}

.btn-gold:hover {
    background-color: #E5A93C;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244, 196, 48, 0.45);
}

.btn-whatsapp {
    background-color: #25D366;
    color: #ffffff;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp:hover {
    background-color: #1DA851;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.45);
}

.step-badge {
    background: linear-gradient(135deg, #F4C430 0%, #E5A93C 100%);
}

.tab-btn.active {
    background-color: #1E5631;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(30, 86, 49, 0.25);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #F9F9F6;
}
::-webkit-scrollbar-thumb {
    background: #1E5631;
    border-radius: 4px;
}

/* Responsive embed wrapper (Google Drive preview, YouTube, dsb) */
.iframe-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 1rem;
    background: #0f0f0f;
}

.iframe-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Rasio dokumen (mirip halaman A4 potret) untuk preview PDF Google Drive */
.document-ratio {
    padding-bottom: 130%;
}

/* Rasio video 16:9 untuk YouTube */
.video-ratio {
    padding-bottom: 56.25%;
}

/* Step card klik indikator */
.step-click-hint {
    opacity: 0.75;
    transition: opacity 0.2s ease-in-out;
}
.card-hover:hover .step-click-hint {
    opacity: 1;
}

/* Modal Tutorial Detail */
.modal-overlay {
    background: rgba(20, 30, 20, 0.65);
    backdrop-filter: blur(3px);
}

.modal-panel {
    animation: modalPop 0.25s ease-out;
    max-height: 88vh;
}

@keyframes modalPop {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}