#tech-panel {
    position: relative;
    min-height: 400px;
    margin-top: 30px;
    padding: 45px;
    box-sizing: border-box;

    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;

    background:
        linear-gradient(
            135deg,
            rgba(20, 28, 48, 0.92),
            rgba(10, 15, 28, 0.96)
        );

    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);

    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);

    overflow: hidden;
    cursor: pointer;

    transition:
        transform 0.45s cubic-bezier(0.16, 1, 0.3, 1),
        border-color 0.4s ease,
        box-shadow 0.4s ease;
}

#tech-panel::before {
    content: "";

    position: absolute;

    width: 380px;
    height: 380px;

    top: -220px;
    right: -120px;

    border-radius: 50%;

    background: rgba(59, 130, 246, 0.16);

    filter: blur(80px);

    pointer-events: none;

    animation: techGlow 8s ease-in-out infinite alternate;
}

#tech-panel::after {
    content: "";

    position: absolute;

    width: 280px;
    height: 280px;

    bottom: -200px;
    left: -120px;

    border-radius: 50%;

    background: rgba(99, 102, 241, 0.12);

    filter: blur(80px);

    pointer-events: none;

    animation: techGlowReverse 10s ease-in-out infinite alternate;
}

#tech-panel:hover {
    transform: translateY(-4px);

    border-color: rgba(96, 165, 250, 0.2);

    box-shadow:
        0 35px 90px rgba(0, 0, 0, 0.45),
        0 0 40px rgba(59, 130, 246, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.tech-category {
    position: absolute;

    top: 45px;
    left: 45px;
    right: 45px;
    bottom: 80px;

    opacity: 0;

    transform: translateX(45px);
    pointer-events: none;

    transition:
        opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
        transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-category.active {
    position: relative;
    top: 0px;
    left: 0px;

    opacity: 1;

    transform: translateX(0);

    pointer-events: auto;
}

.tech-number {
    display: block;

    margin-bottom: 8px;

    color: #60a5fa;

    font-size: 13px;
    font-weight: 700;

    letter-spacing: 3px;
}

.tech-category h2 {
    margin: 0;

    color: #ffffff;

    font-size: 34px;
    font-weight: 800;

    line-height: 1.1;

    letter-spacing: -1.2px;
}

.tech-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 100px));
    gap: 14px;
    margin-top: 28px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.tech-item {
    width: 100%;
    aspect-ratio: 1 / 1;
    min-width: 0;

    box-sizing: border-box;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 9px;

    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;

    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.055),
            rgba(255, 255, 255, 0.02)
        );

    color: #dbeafe;

    transition:
        transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
        border-color 0.35s ease,
        background 0.35s ease,
        box-shadow 0.35s ease;
}

.tech-item i {
    font-size: 32px;

    line-height: 1;

    transition:
        transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
        filter 0.35s ease;
}

.tech-item span {
    color: #cbd5e1;

    font-size: 12px;
    font-weight: 600;

    line-height: 1;

    text-align: center;

    white-space: nowrap;

    transition:
        color 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-7px) scale(1.03);

    border-color: rgba(96, 165, 250, 0.4);

    background:
        linear-gradient(
            145deg,
            rgba(59, 130, 246, 0.12),
            rgba(99, 102, 241, 0.06)
        );

    box-shadow:
        0 15px 35px rgba(0, 0, 0, 0.28),
        0 0 25px rgba(59, 130, 246, 0.08);
}

.tech-item:hover i {
    transform: scale(1.15);

    filter:
        drop-shadow(
            0 0 8px rgba(96, 165, 250, 0.5)
        );
}

.tech-item:hover span {
    color: #ffffff;
}

.tech-navigation {
    position: absolute;

    left: 45px;
    right: 45px;
    bottom: 25px;

    display: flex;

    align-items: center;
    justify-content: space-between;

    z-index: 5;
}

.tech-progress {
    display: flex;

    align-items: center;

    gap: 7px;
}

.tech-progress span {
    display: block;

    width: 7px;
    height: 7px;

    border-radius: 50%;

    background: rgba(148, 163, 184, 0.3);

    transition:
        width 0.35s ease,
        background 0.35s ease,
        box-shadow 0.35s ease;
}

.tech-progress span.active {
    width: 25px;

    border-radius: 10px;

    background: #60a5fa;

    box-shadow:
        0 0 10px rgba(96, 165, 250, 0.55),
        0 0 20px rgba(96, 165, 250, 0.2);
}

.tech-hint {
    color: rgba(148, 163, 184, 0.65);

    font-size: 12px;
    font-weight: 500;

    letter-spacing: 0.3px;

    user-select: none;

    transition:
        color 0.3s ease;
}

#tech-panel:hover .tech-hint {
    color: rgba(191, 219, 254, 0.85);
}

@keyframes techGlow {
    from {
        transform: translate(0, 0) scale(1);
    }

    to {
        transform: translate(-80px, 70px) scale(1.3);
    }
}

@keyframes techGlowReverse {
    from {
        transform: translate(0, 0) scale(1);
    }

    to {
        transform: translate(80px, -60px) scale(1.25);
    }
}