/* ── TVET solar simulator – clean sheet v3 ── */

/* shell: single column, tight gap */
.sim-shell {
    display: grid;
    gap: 8px;
    width: 100%;
}

.tvet-quick-links {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

@media (max-width: 1100px) {
    .tvet-quick-links {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.tvet-quick-link {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem 1rem;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
        linear-gradient(135deg, rgba(0, 161, 222, 0.14), rgba(247, 209, 23, 0.08), rgba(32, 96, 61, 0.12));
    text-decoration: none;
    color: #f7fbff;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
    min-height: 104px;
}

.tvet-quick-link:hover {
    transform: translateY(-2px);
    border-color: rgba(98, 200, 245, 0.35);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

.tvet-quick-link-active {
    border-color: rgba(247, 209, 23, 0.42);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04)),
        linear-gradient(135deg, rgba(247, 209, 23, 0.18), rgba(0, 161, 222, 0.14), rgba(32, 96, 61, 0.16));
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.2), inset 0 0 0 1px rgba(247, 209, 23, 0.12);
}

.tvet-quick-link-active:hover {
    border-color: rgba(247, 209, 23, 0.56);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.24), inset 0 0 0 1px rgba(247, 209, 23, 0.18);
}

.tvet-quick-link-active .tvet-quick-link-kicker {
    color: rgba(255, 234, 154, 0.9);
}

.tvet-quick-link-kicker {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(184, 232, 255, 0.76);
}

.tvet-quick-link strong {
    font-size: 1rem;
    color: #ffffff;
}

.tvet-quick-link span:last-child {
    font-size: 0.84rem;
    line-height: 1.45;
    color: rgba(255, 255, 255, 0.72);
}

/* top bar */
.sim-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.25rem 0.7rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.sim-title {
    margin: 0;
    font-size: clamp(1rem, 2.2vw, 1.3rem);
    line-height: 1.2;
}

.sim-sub {
    margin: 0;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.7);
}

/* two-column body */
.sim-body {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr) 170px;
    gap: 10px;
    align-items: start;
    width: 100%;
}

/* ── controls ── */
.sim-controls {
    display: grid;
    gap: 8px;
    align-self: start;
}

.sim-fieldset {
    margin: 0;
    padding: 0.6rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    display: grid;
    gap: 7px;
}

.sim-fieldset legend {
    padding: 0 0.3rem;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.sim-ctrl label {
    display: flex;
    justify-content: space-between;
    font-size: 0.84rem;
    margin-bottom: 3px;
    color: rgba(255, 255, 255, 0.88);
}

.sim-ctrl label output {
    font-weight: 700;
    color: #fff;
}

.sim-ctrl input[type="range"] {
    width: 100%;
    height: 16px;
    accent-color: #00a1de;
    cursor: pointer;
}

/* ── scene column (middle) ── */
.sim-scene-col {
    display: grid;
    gap: 6px;
    min-width: 0;
    width: 100%;
}

.sim-scene {
    width: 100%;
    min-height: clamp(420px, 60vh, 640px);
    border-radius: 18px;
    overflow: hidden;
    background: #0a1e38;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.sim-scene canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.sim-legend {
    margin: 0;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    text-align: center;
}

/* ── results: single column of tiles ── */
.sim-results {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    align-content: start;
    width: 170px;
    justify-self: end;
    align-self: start;
    margin-left: auto;
}

.sim-metric {
    padding: 0.55rem 0.6rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.09);
}

.sim-metric-primary {
    background: rgba(0, 161, 222, 0.14);
    border-color: rgba(0, 161, 222, 0.3);
}

.sim-metric span {
    display: block;
    font-size: 0.68rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 0.18rem;
    line-height: 1.3;
}

.sim-metric strong {
    display: block;
    font-size: 0.95rem;
    color: #fff;
    font-weight: 700;
}

/* ── formula panel ── */
.sim-formula-panel {
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    overflow: hidden;
}

.sim-formula-panel summary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.82);
    list-style: none;
    user-select: none;
}

.sim-formula-panel summary::-webkit-details-marker { display: none; }

.sim-formula-panel summary::after {
    content: '▸';
    margin-left: auto;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.45);
    transition: transform 0.18s ease;
}

.sim-formula-panel[open] summary::after {
    transform: rotate(90deg);
}

.sim-formula-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(0, 161, 222, 0.22);
    color: #62c8f5;
    font-size: 0.9rem;
    font-style: italic;
    font-weight: 800;
    flex-shrink: 0;
}

.sim-formula-body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    padding: 0 1rem 1rem;
}

.sim-formula-group {
    padding: 0.9rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.sim-formula-group h4 {
    margin: 0 0 0.6rem;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.sim-formula-group p {
    margin: 0.5rem 0 0.2rem;
    font-size: 0.84rem;
    color: rgba(255, 255, 255, 0.72);
}

.sim-formula-eq {
    margin: 0.35rem 0;
    padding: 0.45rem 0.7rem;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.28);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.84rem;
    color: #e8f4ff;
    line-height: 1.55;
}

.sim-formula-eq.sim-formula-highlight {
    background: rgba(0, 161, 222, 0.16);
    border-left: 3px solid rgba(0, 161, 222, 0.65);
    color: #b8e8ff;
    font-weight: 700;
}

.sim-formula-tag {
    font-family: inherit;
    font-size: 0.73rem;
    padding: 0.1rem 0.38rem;
    border-radius: 999px;
    background: rgba(247, 209, 23, 0.14);
    color: rgba(247, 209, 23, 0.82);
    vertical-align: middle;
}

.sim-formula-note {
    font-size: 0.78rem !important;
    color: rgba(255, 255, 255, 0.46) !important;
    font-style: italic;
    margin-top: 0.5rem !important;
}

.sim-formula-assumptions {
    grid-column: 1 / -1;
}

.sim-formula-assumptions ul {
    margin: 0;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.28rem;
}

.sim-formula-assumptions li {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.62);
    line-height: 1.5;
}

@media (max-width: 720px) {
    .sim-formula-body {
        grid-template-columns: 1fr;
    }
}

/* ── assumptions (legacy class) ── */
.sim-assumptions {
    padding: 0.75rem 0.9rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.sim-assumptions summary {
    cursor: pointer;
    font-size: 0.84rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.75);
}

.sim-assumptions p {
    margin: 0.55rem 0 0;
    font-size: 0.84rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* ── responsive ── */
@media (max-width: 1100px) {
    .sim-body {
        grid-template-columns: 170px minmax(0, 1fr) 150px;
        gap: 8px;
    }

    .sim-results {
        width: 150px;
    }
}

@media (max-width: 900px) {
    .sim-body {
        grid-template-columns: 1fr;
    }

    .tvet-quick-links {
        grid-template-columns: 1fr;
    }

    /* scene first on mobile so it's visible without scrolling */
    .sim-scene-col { order: -1; }
    .sim-controls   { order: 0; }
    .sim-results    { order: 1; }

    .sim-results {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        width: 100%;
        margin-left: 0;
        justify-self: stretch;
    }

    .sim-scene {
        min-height: 300px;
    }
}

@media (max-width: 900px) {
    /* larger touch targets for sliders on touch screens */
    .sim-ctrl input[type="range"] {
        height: 28px;
        touch-action: pan-x;
    }
}

@media (max-width: 600px) {
    .sim-topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .sim-results {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sim-scene {
        min-height: 300px;
    }
}

/* ── dead styles kept for compat; not used in v3 HTML ── */
.tvet-solar-lab {
    margin-top: 14px;
    padding: clamp(0.9rem, 2vw, 1.25rem);
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(8, 17, 30, 0.82);
    box-shadow: 0 28px 64px rgba(0, 0, 0, 0.22);
}

.tvet-solar-intro {
    margin-bottom: 12px;
}

.tvet-solar-intro h2 {
    margin: 0 0 0.3rem;
    font-size: clamp(1.4rem, 2.5vw, 2rem);
}

.tvet-solar-intro p {
    margin: 0;
    color: rgba(255, 255, 255, 0.84);
    font-size: 0.95rem;
}

.tvet-solar-layout {
    display: grid;
    grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.tvet-solar-controls {
    display: grid;
    gap: 10px;
}

.tvet-solar-fieldset {
    margin: 0;
    padding: 0.8rem;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 12px;
}

.tvet-solar-fieldset legend {
    padding: 0 0.35rem;
    font-weight: 700;
}

.tvet-control-group {
    min-width: 0;
}

.tvet-control-group-wide {
    grid-column: 1 / -1;
}

.tvet-control {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin: 0 0 0.18rem;
    font-size: 0.88rem;
}

.tvet-control strong {
    font-size: 0.88rem;
    color: #f7f9fc;
}

.tvet-axis-label {
    margin: 0.25rem 0 0;
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.75rem;
}

.tvet-solar-controls input[type="range"] {
    width: 100%;
    accent-color: #00a1de;
    height: 18px;
}

.tvet-solar-controls input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(0, 161, 222, 0.85), rgba(247, 209, 23, 0.8));
}

.tvet-solar-controls input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    margin-top: -4px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid #00a1de;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.28);
}

.tvet-solar-controls input[type="range"]::-moz-range-track {
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(0, 161, 222, 0.85), rgba(247, 209, 23, 0.8));
}

.tvet-solar-controls input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid #00a1de;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.28);
}

.tvet-solar-main {
    min-width: 0;
    display: grid;
    gap: 12px;
}

.tvet-solar-visual {
    min-width: 0;
    padding: 0.95rem;
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.tvet-solar-visual-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: end;
    margin-bottom: 0.65rem;
}

.tvet-solar-visual-head h3,
.tvet-solar-results-head h3 {
    margin: 0;
    font-size: 1.15rem;
}

.tvet-solar-visual-head p,
.tvet-solar-results-head p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.86rem;
}

.tvet-solar-scene {
    width: 100%;
    min-height: 500px;
    border-radius: 18px;
    overflow: hidden;
    background: radial-gradient(circle at top, rgba(98, 180, 255, 0.26), rgba(7, 18, 34, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.tvet-solar-scene canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.tvet-solar-legend {
    margin: 0.55rem 0 0;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.68);
}

.tvet-solar-results {
    margin-top: 0;
}

.tvet-solar-results-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: end;
    margin-bottom: 0.65rem;
}

.tvet-solar-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.tvet-metric-card {
    padding: 0.8rem 0.9rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tvet-metric-card span,
.tvet-solar-breakdown span {
    display: block;
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.78rem;
}

.tvet-metric-card strong,
.tvet-solar-breakdown strong {
    display: block;
    margin: 0.22rem 0;
    font-size: clamp(1rem, 1.8vw, 1.28rem);
    color: #ffffff;
}

.tvet-metric-card small {
    font-size: 0.77rem;
    color: rgba(255, 255, 255, 0.62);
}

.tvet-solar-breakdown {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.tvet-solar-breakdown > div {
    padding: 0.75rem 0.9rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.tvet-solar-assumptions {
    margin-top: 12px;
    padding: 0.85rem 0.95rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.tvet-solar-assumptions summary {
    cursor: pointer;
    font-weight: 700;
}

.tvet-solar-assumptions p {
    margin: 0.8rem 0 0;
    color: rgba(255, 255, 255, 0.76);
}

.tvet-solar-scene-fallback {
    display: grid;
    place-items: center;
    min-height: 100%;
    padding: 1.2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
}

@media (max-width: 980px) {
    .tvet-solar-layout,
    .tvet-solar-metrics,
    .tvet-solar-breakdown {
        grid-template-columns: 1fr;
    }

    .tvet-solar-fieldset {
        grid-template-columns: 1fr;
    }

    .tvet-solar-visual-head,
    .tvet-solar-results-head {
        flex-direction: column;
        align-items: start;
    }

    .tvet-solar-scene {
        min-height: 420px;
    }
}

@media (max-width: 640px) {
    .tvet-solar-lab {
        padding: 0.9rem;
        border-radius: 22px;
    }

    .tvet-solar-fieldset,
    .tvet-solar-visual,
    .tvet-metric-card,
    .tvet-solar-breakdown > div {
        padding: 0.8rem;
    }

    .tvet-solar-scene {
        min-height: 340px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tvet-solar-controls input[type="range"] {
        scroll-behavior: auto;
    }
}

/* ── Info icon tooltips ──────────────────────────────────────────────── */
.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.1em;
    height: 1.1em;
    border-radius: 50%;
    background: #3a7fbf;
    color: #fff;
    font-size: 0.7rem;
    font-style: normal;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    user-select: none;
    vertical-align: middle;
    margin-left: 0.25rem;
}

.info-icon::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: #1a2a3a;
    color: #e8eef4;
    font-size: 0.72rem;
    line-height: 1.4;
    padding: 0.45em 0.7em;
    border-radius: 6px;
    width: 200px;
    white-space: normal;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.18s ease;
    z-index: 200;
    box-shadow: 0 2px 8px rgba(0,0,0,0.35);
}

.info-icon:hover::after,
.info-icon.show-tooltip::after {
    opacity: 1;
}