/* TUBE GRAPHICS (Positioning) */
#triangle-section {
    overflow: visible !important;
    width: clamp(420px, 46vw, 620px) !important;
    height: clamp(300px, 38vh, 430px) !important;
    min-height: auto !important;
    margin: 0 auto;
}
#triangle-section::before {
    display: none !important;
}

.tube { position: absolute; pointer-events: none; z-index: 1; }
.tube-svg {
    display: block;
    width: 100%; height: 100%;
    filter: drop-shadow(0 2px 10px rgba(0,0,0,0.8));
    transition: opacity 0.2s ease;
}
.corner-container .tube { position: relative; flex-shrink: 0; width: 36px; height: 65px; }

.tube-pos-top {
    width: 42px; height: 73px;
    top: -65px; left: 50%; transform: translateX(-50%);
}
.tube-pos-bl {
    width: 38px; height: 68px;
    bottom: -55px; left: 0px;
}
.tube-pos-br {
    width: 36px; height: 64px;
    bottom: -50px; right: 5px;
}

.tube-glow { transition: opacity 100ms ease; }

/* CORNER LABELS & CONTAINERS */
.corner-container {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    pointer-events: none;
    z-index: 5;
}
.container-bl { bottom: -36px; left: 50px; transform: translateX(-50%); }
.container-br { bottom: -36px; right: 50px; transform: translateX(50%); }
.container-bl .corner-label { text-align: center; }
.container-br .corner-label { text-align: center; }

.corner-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 9px;
    font-weight: 900;
    text-shadow: 0 0 5px rgba(0,0,0,0.8);
    line-height: 1.2;
}
.corner-label.top { position: absolute; top: -15px; left: 50%; transform: translateX(-50%); color: var(--orange); }
.container-bl .corner-label { color: var(--cyan); }
.container-br .corner-label { color: var(--pink); }

.band-label {
    transition: all 0.3s ease;
}

.band-label.highlight {
    font-size: 1.2em;
    font-weight: bold;
    text-shadow: 0 0 15px currentColor;
    letter-spacing: 2px;
}

/* HOLOGRAPHIC TUBE SELECTOR */
.tube-pos-top {
    pointer-events: auto !important;
    cursor: pointer;
    transition: transform 0.2s ease, filter 0.2s ease;
    z-index: 10;
}
.tube-pos-top:hover {
    transform: translateX(-50%) scale(1.1);
    filter: drop-shadow(0 0 12px rgba(255,106,0,0.5));
}

.corner-container {
    pointer-events: auto;
    cursor: pointer;
    transition: filter 0.2s ease;
    z-index: 10;
}
.corner-container:hover {
    filter: drop-shadow(0 0 12px rgba(255,255,255,0.25));
}

.corner-label.top {
    pointer-events: auto;
    cursor: pointer;
    transition: text-shadow 0.2s ease;
    z-index: 11;
}
.corner-label.top:hover {
    text-shadow: 0 0 12px rgba(255,106,0,0.7);
}

.model-name {
    font-size: 8px;
    opacity: 0.75;
    letter-spacing: 1px;
}

/* THE HOLOGRAPHIC OVERLAY */
#tube-selector-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 200;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
#tube-selector-overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* THE SELECTOR BOX */
#selector-box {
    width: 500px;
    background: rgba(10, 10, 12, 0.97);
    border: 1px solid #333;
    box-shadow: 0 0 50px rgba(0,0,0,0.8), inset 0 0 20px rgba(255,255,255,0.02);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}
#tube-selector-overlay.active #selector-box {
    transform: scale(1);
}

#selector-box.theme-orange { border-color: var(--orange); box-shadow: 0 0 40px rgba(255,106,0,0.15), inset 0 0 20px rgba(255,255,255,0.02); }
#selector-box.theme-cyan   { border-color: var(--cyan);   box-shadow: 0 0 40px rgba(0,229,255,0.15), inset 0 0 20px rgba(255,255,255,0.02); }
#selector-box.theme-pink   { border-color: var(--pink);   box-shadow: 0 0 40px rgba(255,0,85,0.15),  inset 0 0 20px rgba(255,255,255,0.02); }

/* HEADER */
#selector-header {
    background: rgba(255,255,255,0.03);
    padding: 15px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
#selector-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 16px;
    letter-spacing: 5px;
    margin: 0;
    color: #fff;
}
.power-btn {
    background: none;
    border: 1px solid #444;
    color: #888;
    width: 28px; height: 28px;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
    margin-left: auto;
    margin-right: 10px;
}
.power-btn:hover { border-color: #fff; color: #fff; }
.power-btn.active { border-color: var(--orange); color: var(--orange); box-shadow: 0 0 10px rgba(255,106,0,0.5); }
.theme-cyan .power-btn.active { border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 10px rgba(0,229,255,0.5); }
.theme-pink .power-btn.active { border-color: var(--pink); color: var(--pink); box-shadow: 0 0 10px rgba(255,0,85,0.5); }

.close-btn {
    background: none;
    border: 1px solid #444;
    color: #888;
    width: 28px; height: 28px;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-family: monospace;
    padding: 0;
}
.close-btn:hover { border-color: #fff; color: #fff; }

/* TUBE GRID */
#tube-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3px;
    padding: 10px;
}

.selector-groups {
    display: flex;
    gap: 8px;
    padding: 10px 14px 6px 14px;
    overflow-x: auto;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
}

.group-chip {
    padding: 6px 12px;
    font-family: 'Orbitron', sans-serif;
    font-size: 10px;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    border: 1px solid rgba(255,255,255,0.15);
    background: rgba(0,0,0,0.25);
    color: #888;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.18s ease;
    flex-shrink: 0;
}
.group-chip:hover { color: #fff; border-color: #fff; box-shadow: 0 0 10px rgba(255,255,255,0.15); }
.group-chip.active { color: #fff; border-color: var(--orange); box-shadow: 0 0 12px rgba(255,106,0,0.25); background: rgba(255,106,0,0.08); }

#selector-box.theme-cyan   .group-chip.active { border-color: var(--cyan);   box-shadow: 0 0 12px rgba(0,229,255,0.25);  background: rgba(0,229,255,0.08); }
#selector-box.theme-pink   .group-chip.active { border-color: var(--pink);   box-shadow: 0 0 12px rgba(255,0,85,0.25);   background: rgba(255,0,85,0.08); }

.opt-group {
    display: inline-block;
    margin-top: 4px;
    padding: 2px 6px;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 4px;
    font-size: 9px;
    letter-spacing: 1px;
    color: #999;
    text-transform: uppercase;
}

.tube-option {
    display: flex;
    align-items: center;
    padding: 11px 18px;
    background: rgba(0,0,0,0.3);
    border: 1px solid transparent;
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all 0.18s ease;
}
.tube-option:hover {
    background: rgba(255,255,255,0.05);
    padding-left: 24px;
}
.tube-option.selected {
    background: linear-gradient(90deg, rgba(255,255,255,0.08), transparent);
    border-left-color: #ffffff;
}
.theme-orange .tube-option.selected { border-left-color: var(--orange); }
.theme-cyan   .tube-option.selected { border-left-color: var(--cyan); }
.theme-pink   .tube-option.selected { border-left-color: var(--pink); }

/* OPTION ICON */
.opt-icon {
    width: 48px; height: 48px;
    min-width: 48px;
    margin-right: 14px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 9px;
    color: #555;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0;
    transition: all 0.18s ease;
    background: rgba(0,0,0,0.3);
    overflow: visible;
}
.opt-icon svg {
    width: 100%;
    height: 100%;
    flex-shrink: 0;
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.1));
}

.theme-orange .opt-icon svg { stroke: var(--orange); fill: none; }
.theme-cyan   .opt-icon svg { stroke: var(--cyan);   fill: none; }
.theme-pink   .opt-icon svg { stroke: var(--pink);   fill: none; }
.theme-orange .tube-option:hover .opt-icon { border-color: var(--orange); color: var(--orange); box-shadow: 0 0 8px var(--orange); background: rgba(255,106,0,0.06); }
.theme-cyan   .tube-option:hover .opt-icon { border-color: var(--cyan);   color: var(--cyan);   box-shadow: 0 0 8px var(--cyan);   background: rgba(0,229,255,0.06); }
.theme-pink   .tube-option:hover .opt-icon { border-color: var(--pink);   color: var(--pink);   box-shadow: 0 0 8px var(--pink);   background: rgba(255,0,85,0.06); }

.theme-orange .tube-option.selected .opt-icon { border-color: var(--orange); color: var(--orange); box-shadow: 0 0 6px rgba(255,106,0,0.4); background: rgba(255,106,0,0.08); }
.theme-cyan   .tube-option.selected .opt-icon { border-color: var(--cyan);   color: var(--cyan);   box-shadow: 0 0 6px rgba(0,229,255,0.4); background: rgba(0,229,255,0.08); }
.theme-pink   .tube-option.selected .opt-icon { border-color: var(--pink);   color: var(--pink);   box-shadow: 0 0 6px rgba(255,0,85,0.4);  background: rgba(255,0,85,0.08); }

/* OPTION TEXT */
.opt-info { display: flex; flex-direction: column; gap: 2px; }
.opt-name { font-weight: bold; font-size: 12px; letter-spacing: 1.5px; color: #ddd; }
.opt-desc { font-size: 10px; color: #666; letter-spacing: 0.5px; }

.tube-svg {
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), filter 0.3s ease;
    transform-origin: center bottom;
}
.tube-option:hover .tube-svg, .corner-container:hover .tube-svg, .tube-pos-top:hover .tube-svg {
    transform: translateY(-4px) scale(1.05);
    filter: drop-shadow(0 15px 15px rgba(0,0,0,0.9)) brightness(1.2);
}

/* ════ RESPONSIVE TUBE STYLES ════ */
@media (max-width: 768px) {
    #triangle-section {
        width: clamp(280px, 85vw, 420px) !important;
        height: clamp(200px, 60vw, 300px) !important;
    }

    #selector-box {
        width: 95vw;
        max-height: 80vh;
        overflow-y: auto;
    }

    .tube-pos-top {
        width: 32px; height: 56px;
        top: -50px;
    }
    .tube-pos-bl {
        width: 30px; height: 52px;
        bottom: -42px;
    }
    .tube-pos-br {
        width: 28px; height: 50px;
        bottom: -40px;
    }

    .corner-label {
        font-size: 7px;
    }

    .tube-option {
        padding: 9px 14px;
    }

    .opt-icon {
        width: 40px; height: 40px;
        min-width: 40px;
        margin-right: 10px;
    }
}

@media (max-width: 480px) {
    #triangle-section {
        width: clamp(240px, 90vw, 320px) !important;
        height: clamp(170px, 55vw, 230px) !important;
    }

    .corner-container {
        gap: 3px;
    }

    .corner-label {
        font-size: 6px;
    }

    .model-name {
        font-size: 6px;
    }
}