h1 { text-align: center; }

.hw-techniques {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 10px;
}
.hw-technique-card {
    background: var(--bg-card);
    border: 1px solid rgba(51, 153, 255, 0.2);
    border-radius: 14px;
    padding: 20px 22px;
    transition: border-color 0.2s;
}
.hw-technique-card:hover { border-color: rgba(51, 153, 255, 0.45); }
.hw-technique-icon { font-size: 1.8rem; margin-bottom: 10px; }
.hw-technique-card h4 {
    margin: 0 0 8px;
    font-size: 0.97rem;
    background: linear-gradient(135deg, #3399ff, #66d9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hw-technique-card p {
    margin: 0;
    font-size: 0.88rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.55;
}

/* Flipper demo */
.fz-demo-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 16px;
}
@media (max-width: 768px) { .fz-demo-layout { grid-template-columns: 1fr; } }

.fz-panel {
    background: var(--bg-card);
    border: 1px solid rgba(51,153,255,0.15);
    border-radius: 14px;
    padding: 20px;
}
.fz-panel h4 {
    margin: 0 0 14px;
    font-size: 0.95rem;
    background: linear-gradient(135deg, #3399ff, #66d9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.fz-device-visual {
    background: rgba(255,255,255,0.04);
    border-radius: 10px;
    padding: 18px;
    text-align: center;
    margin-bottom: 14px;
}
.fz-device-icon { font-size: 3rem; margin-bottom: 8px; }
.fz-screen {
    background: #0d2a1a;
    border: 1px solid rgba(34,197,94,0.3);
    border-radius: 8px;
    padding: 10px 14px;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: #86efac;
    min-height: 60px;
    text-align: left;
    margin-bottom: 12px;
    line-height: 1.6;
}
.fz-step-indicator {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 14px;
}
.fz-step {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: 2px solid rgba(51,153,255,0.3);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    transition: all 0.3s;
}
.fz-step.active { border-color: #3399ff; color: #3399ff; background: rgba(51,153,255,0.1); }
.fz-step.done { border-color: #22c55e; color: #22c55e; background: rgba(34,197,94,0.1); }

.fz-action-btn {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: none;
    background: linear-gradient(135deg, #3399ff, #66d9ff);
    color: #0f172a;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: opacity 0.2s;
}
.fz-action-btn:hover:not(:disabled) { opacity: 0.88; }
.fz-action-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.fz-door-panel {
    background: var(--bg-card);
    border: 1px solid rgba(51,153,255,0.15);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    min-height: 220px;
}
.fz-door { font-size: 4rem; transition: all 0.5s; filter: grayscale(1) opacity(0.4); }
.fz-door.unlocked { filter: none; animation: fz-bounce 0.4s ease; }
@keyframes fz-bounce { 0%,100% { transform: scale(1); } 50% { transform: scale(1.15); } }
.fz-door-status { font-size: 0.85rem; color: rgba(255,255,255,0.45); text-align: center; }
.fz-door-status.unlocked { color: #86efac; font-weight: 600; }

.fz-result-banner {
    display: none; margin-top: 14px; padding: 12px 16px;
    border-radius: 10px; font-size: 0.88rem; font-weight: 600;
}
.fz-result-banner.danger { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.35); color: #f87171; }
.hw-demo-btns { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; }