/* ══════════════════════════════════════════════════════════════
   SIDEBAR — Grouped Icon Card Navigation
   ══════════════════════════════════════════════════════════════
   Replaces the flat nav-btn list with a 3-column card grid
   organized into 4 color-coded groups:
     🔬 Research  → Cyan    (#22d3ee)
     💹 Trading   → Green   (#34d399)
     🛠️ Tools     → Purple  (#a78bfa)
     ⚙️ Account   → Amber   (#fbbf24)
   ══════════════════════════════════════════════════════════════ */

/* ── Group Labels ── */
.nav-group-label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding-left: 2px;
    margin-bottom: 6px;
}

/* ── Card Grid ── */
.nav-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    margin-bottom: 12px;
}

/* ── Card Button — Base ── */
.nav-card-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 4px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.04);
    background: rgba(15,23,42,0.3);
    color: #64748b;
    font-size: 10px;
    font-weight: 500;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(.4, 0, .2, 1);
    text-align: center;
    line-height: 1.2;
    position: relative;
    overflow: hidden;
    min-height: 58px;
}

.nav-card-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.nav-card-btn:active {
    transform: translateY(0) scale(0.96);
}

/* ── Cyan Group (Research) ── */
.nav-card-cyan {
    border-color: rgba(34,211,238,0.08);
    background: linear-gradient(160deg, rgba(34,211,238,0.03) 0%, transparent 100%);
}
.nav-card-cyan:hover {
    background: rgba(34,211,238,0.08);
    border-color: rgba(34,211,238,0.2);
    color: #22d3ee;
    box-shadow: 0 4px 16px rgba(34,211,238,0.1);
}

/* ── Green Group (Trading) ── */
.nav-card-green {
    border-color: rgba(52,211,153,0.08);
    background: linear-gradient(160deg, rgba(52,211,153,0.03) 0%, transparent 100%);
}
.nav-card-green:hover {
    background: rgba(52,211,153,0.08);
    border-color: rgba(52,211,153,0.2);
    color: #34d399;
    box-shadow: 0 4px 16px rgba(52,211,153,0.1);
}

/* ── Purple Group (Tools) ── */
.nav-card-purple {
    border-color: rgba(167,139,250,0.08);
    background: linear-gradient(160deg, rgba(167,139,250,0.03) 0%, transparent 100%);
}
.nav-card-purple:hover {
    background: rgba(167,139,250,0.08);
    border-color: rgba(167,139,250,0.2);
    color: #a78bfa;
    box-shadow: 0 4px 16px rgba(167,139,250,0.1);
}

/* ── Amber Group (Account) ── */
.nav-card-amber {
    border-color: rgba(251,191,36,0.08);
    background: linear-gradient(160deg, rgba(251,191,36,0.03) 0%, transparent 100%);
}
.nav-card-amber:hover {
    background: rgba(251,191,36,0.08);
    border-color: rgba(251,191,36,0.2);
    color: #fbbf24;
    box-shadow: 0 4px 16px rgba(251,191,36,0.1);
}

/* ── Active States (applied via callback inline styles, reinforced here) ── */
.nav-card-cyan[style*="boxShadow"] { color: #22d3ee !important; }
.nav-card-green[style*="boxShadow"] { color: #34d399 !important; }
.nav-card-purple[style*="boxShadow"] { color: #a78bfa !important; }
.nav-card-amber[style*="boxShadow"] { color: #fbbf24 !important; }

/* ── Locked Cards ── */
.nav-card-btn:has(span:last-child:not(:empty)) {
    opacity: 0.45;
}

/* ── Mobile: Cards in hamburger drawer ── */
@media (max-width: 768px) {
    .nav-card-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
    }
    .nav-card-btn {
        padding: 8px 4px;
        min-height: 52px;
        font-size: 9px;
    }
    .nav-card-btn:hover {
        transform: none;
    }
    .nav-card-btn:active {
        transform: scale(0.95);
    }
    .nav-group-label {
        font-size: 8px;
    }
}

/* ── Tablet: slightly larger cards ── */
@media (min-width: 769px) and (max-width: 1024px) {
    .nav-card-btn {
        padding: 9px 4px;
        min-height: 54px;
    }
}