/* ==========================================================================
   EMU JAPAN - LEARNING HUB (COMPACT & BALANCED LAYOUT)
   ========================================================================== */

:root {
    --emu-primary: #9d0b03;
    --emu-primary-hover: #7e0902;
    --emu-border: #e2e8f0;
    --emu-text-dark: #0f172a;
    --emu-text-muted: #64748b;
    --emu-bg-card: #ffffff;
    --emu-bg-hover: #fffafa;
}


/* Base Layout & Responsive Width */

.container-emu {
    width: min(100% - 24px, 1000px);
    /* Memperketat container agar konten tidak terlalu renggang ke samping */
    margin-inline: auto;
}


/* Typography Hierarchy - Scale Down */

.section-title-sm {
    font-size: 1.2rem;
    letter-spacing: -0.2px;
}

.section-subtitle-sm {
    font-size: 0.825rem;
}

.group-title {
    font-size: 0.875rem;
    letter-spacing: -0.1px;
}

.extra-small {
    font-size: 0.75rem;
}


/* Custom Grid Gap Tightening */

.row-compact {
    --bs-gutter-x: 0.75rem;
    /* Mengetatkan jarak horizontal antar card (12px) */
    --bs-gutter-y: 0.75rem;
    /* Mengetatkan jarak vertikal antar card (12px) */
}


/* LEVEL 1: HERO CARD (MATERI UTAMA) - Tight Padding */

.hub-hero-card {
    background: var(--emu-bg-card);
    border: 1px solid var(--emu-border);
    border-left: 4px solid var(--emu-primary);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.hero-clickable-area {
    display: block;
    padding: 1.125rem 1.35rem;
    /* Dipangkas dari 1.75rem */
    position: relative;
    z-index: 1;
}

.hub-hero-bg-kanji {
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 5rem;
    font-weight: 900;
    color: var(--emu-text-dark);
    opacity: 0.035;
    user-select: none;
    pointer-events: none;
    line-height: 1;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.hero-title {
    font-size: 1.05rem;
}

.hero-desc {
    font-size: 0.825rem;
}

.btn-emu-primary-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--emu-primary);
    color: #ffffff !important;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 100px;
    transition: background-color 0.2s ease;
}

.hub-hero-card:hover {
    transform: translateY(-2px);
    border-color: rgba(157, 11, 3, 0.3);
}

.hub-hero-card:hover .hub-hero-bg-kanji {
    transform: translateY(-50%) scale(1.04);
    opacity: 0.06;
}

.hub-hero-card:hover .btn-emu-primary-sm {
    background-color: var(--emu-primary-hover);
}


/* LEVEL 2: DASAR & LATIHAN CARDS */

.hub-card-item {
    background: var(--emu-bg-card);
    border: 1px solid var(--emu-border);
    border-radius: 10px;
    padding: 0.875rem 1.125rem !important;
    /* Dipangkas padat */
    transition: all 0.2s ease;
}

.hub-card-item:hover {
    border-color: rgba(157, 11, 3, 0.3);
    background-color: var(--emu-bg-hover);
    transform: translateY(-2px);
}

.kana-display {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--emu-primary);
    line-height: 1;
}

.hub-icon-box {
    width: 34px;
    height: 34px;
    background-color: #f8fafc;
    color: var(--emu-text-muted);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.hub-card-item:hover .hub-icon-box {
    background-color: rgba(157, 11, 3, 0.06);
    color: var(--emu-primary);
}

.card-item-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--emu-text-dark);
}

.card-item-desc {
    font-size: 0.775rem;
}


/* LEVEL 3: COMPACT TOOLS */

.hub-card-compact {
    background: var(--emu-bg-card);
    border: 1px solid var(--emu-border);
    border-radius: 8px;
    padding: 0.75rem 1rem !important;
    /* Sangat ringkas */
    transition: all 0.2s ease;
}

.hub-card-compact:hover {
    border-color: rgba(157, 11, 3, 0.3);
    background-color: var(--emu-bg-hover);
    transform: translateY(-2px);
}

.hub-compact-icon {
    font-size: 0.95rem;
    color: var(--emu-text-muted);
    transition: color 0.2s ease;
}

.hub-card-compact:hover .hub-compact-icon {
    color: var(--emu-primary);
}

.card-compact-title {
    font-size: 0.825rem;
    font-weight: 700;
    color: var(--emu-text-dark);
}

.card-compact-desc {
    font-size: 0.75rem;
}


/* MICRO-INTERACTION (ARROW SHIFT) */

.item-arrow {
    transition: transform 0.2s ease, color 0.2s ease;
}

.hub-hero-card:hover .item-arrow,
.hub-card-item:hover .item-arrow,
.hub-card-compact:hover .item-arrow {
    transform: translateX(3px);
    color: var(--emu-primary) !important;
}


/* RESPONSIVE ADJUSTMENTS */

@media (max-width: 767.98px) {
    .hero-clickable-area {
        padding: 1rem;
    }
    .hub-hero-bg-kanji {
        display: none;
    }
}