.radiance-page {
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 16%, transparent), transparent 30%),
        radial-gradient(circle at top right, color-mix(in srgb, var(--heading) 10%, transparent), transparent 26%),
        linear-gradient(180deg, var(--page-bg) 0%, var(--section-bg) 100%);
}

html[data-theme="light"] {
    --radiance-panel-bg: rgba(255, 255, 255, 0.84);
    --radiance-panel-border: rgba(11, 18, 32, 0.08);
    --radiance-shadow: 0 22px 52px rgba(11, 18, 32, 0.08);
    --radiance-progress-bg: rgba(11, 18, 32, 0.08);
    --radiance-output-bg: rgba(247, 248, 250, 0.88);
    --radiance-output-text: #182230;
}

html[data-theme="dark"] {
    --radiance-panel-bg: rgba(20, 28, 39, 0.82);
    --radiance-panel-border: rgba(247, 250, 255, 0.08);
    --radiance-shadow: 0 24px 58px rgba(0, 0, 0, 0.34);
    --radiance-progress-bg: rgba(255, 255, 255, 0.08);
    --radiance-output-bg: rgba(10, 15, 23, 0.92);
    --radiance-output-text: #deecff;
}

.radiance-shell {
    width: min(1440px, calc(100% - 2.5rem));
    margin: 0 auto;
    padding: calc(var(--nav-h) + 2rem) 0 5rem;
}

.radiance-hero,
.radiance-panel,
.radiance-modal__card {
    border: 1px solid var(--radiance-panel-border);
    background: var(--radiance-panel-bg);
    box-shadow: var(--radiance-shadow);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.radiance-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.9fr);
    gap: 1.5rem;
    border-radius: 30px;
    margin-bottom: 1.5rem;
    padding: clamp(1.75rem, 4vw, 3.25rem);
}

.radiance-hero__eyebrow {
    margin: 0 0 0.85rem;
    font-family: var(--ff-heading);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-hover);
}

.radiance-hero h1 {
    margin: 0;
    max-width: 12ch;
    font-family: var(--ff-heading);
    font-size: clamp(2.4rem, 5vw, 4.6rem);
    line-height: 0.96;
    color: var(--heading);
}

.radiance-hero__lede {
    max-width: 64ch;
    margin-top: 1.15rem;
    color: var(--muted);
    font-size: 1.02rem;
    line-height: 1.75;
}

.radiance-hero__cta-group {
    margin-top: 1.4rem;
    max-width: 34rem;
}

.radiance-hero__context-card {
    display: grid;
    gap: 0.45rem;
    padding: 1rem 1.05rem;
    border-radius: 20px;
    border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--radiance-panel-border));
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent 55%),
        color-mix(in srgb, var(--surface) 92%, transparent);
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed), background var(--transition-speed);
}

.radiance-hero__context-card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--accent) 68%, var(--radiance-panel-border));
    box-shadow: 0 18px 36px color-mix(in srgb, var(--accent) 12%, transparent);
}

.radiance-hero__context-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--accent-hover);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.radiance-hero__context-kicker::before {
    content: '';
    width: 0.48rem;
    height: 0.48rem;
    border-radius: 999px;
    background: var(--accent);
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 15%, transparent);
}

.radiance-hero__context-card strong {
    font-family: var(--ff-heading);
    font-size: 1.08rem;
    color: var(--heading);
}

.radiance-hero__context-card span:last-child {
    color: var(--muted);
    line-height: 1.6;
    font-size: 0.94rem;
}

.radiance-hero__facts {
    display: grid;
    gap: 0.9rem;
}

.radiance-fact {
    padding: 1rem 1.1rem;
    border-radius: 20px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.radiance-fact__label {
    display: block;
    margin-bottom: 0.45rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-hover);
}

.radiance-fact strong {
    display: block;
    margin-bottom: 0.45rem;
    font-family: var(--ff-heading);
    font-size: 1.1rem;
    color: var(--heading);
}

.radiance-fact p {
    color: var(--muted);
    line-height: 1.55;
}

.radiance-main {
    display: grid;
    grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.radiance-panel {
    border-radius: 28px;
    padding: clamp(1.2rem, 2vw, 1.8rem);
}

.radiance-section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.radiance-section-head h2 {
    margin: 0;
    font-family: var(--ff-heading);
    font-size: 1.22rem;
    color: var(--heading);
}

.radiance-section-head p {
    margin-top: 0.25rem;
    color: var(--muted);
    line-height: 1.55;
}

.radiance-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.95rem;
}

.radiance-field {
    display: grid;
    gap: 0.55rem;
    position: relative;
}

.radiance-field[hidden] {
    display: none;
}

.radiance-field span {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
}

.radiance-field--toggle {
    align-content: start;
}

.radiance-toggle {
    display: flex;
    align-items: start;
    gap: 0.7rem;
    min-height: 54px;
    padding: 0.95rem 1rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.radiance-toggle input[type="checkbox"] {
    width: 1.05rem;
    height: 1.05rem;
    margin: 0.1rem 0 0;
    accent-color: var(--accent);
}

.radiance-toggle span {
    color: var(--text);
    line-height: 1.5;
}

.radiance-field input,
.radiance-field select {
    width: 100%;
    min-height: 52px;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    color: var(--text);
    font: inherit;
}

.radiance-field--inactive input,
.radiance-field--inactive select {
    opacity: 0.58;
    cursor: not-allowed;
}

.radiance-field--inactive span {
    color: color-mix(in srgb, var(--muted) 72%, transparent);
}

.radiance-field input:focus,
.radiance-field select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}

.radiance-field--fixed-output input {
    border-color: color-mix(in srgb, #dd5d5d 58%, var(--border));
    background: color-mix(in srgb, #dd5d5d 8%, var(--surface));
}

.radiance-field--warning input {
    border-color: color-mix(in srgb, #dd5d5d 58%, var(--border));
    background: color-mix(in srgb, #dd5d5d 8%, var(--surface));
}

.radiance-field--fixed-output input:focus {
    border-color: #dd5d5d;
    box-shadow: 0 0 0 4px color-mix(in srgb, #dd5d5d 18%, transparent);
}

.radiance-field--warning input:focus {
    border-color: #dd5d5d;
    box-shadow: 0 0 0 4px color-mix(in srgb, #dd5d5d 18%, transparent);
}

.radiance-tooltip {
    position: absolute;
    left: 0;
    top: calc(100% + 0.55rem);
    z-index: 5;
    max-width: 280px;
    padding: 0.7rem 0.8rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, #dd5d5d 36%, var(--radiance-panel-border));
    background: color-mix(in srgb, var(--surface) 92%, #2b1010 8%);
    color: var(--text);
    font-size: 0.82rem;
    line-height: 1.45;
    box-shadow: 0 16px 28px rgba(0, 0, 0, 0.18);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-4px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.radiance-field--fixed-output:focus-within .radiance-tooltip {
    opacity: 1;
    transform: translateY(0);
}

.radiance-field--warning:focus-within .radiance-tooltip {
    opacity: 1;
    transform: translateY(0);
}

.radiance-visual-note {
    margin-top: 0.4rem;
    color: color-mix(in srgb, var(--muted) 82%, var(--heading));
    font-size: 0.92rem;
    font-weight: 700;
}

.radiance-status-note {
    margin: 1rem 0 0;
    color: var(--muted);
    line-height: 1.55;
}

.radiance-status-note[data-tone="error"] {
    color: #d35f5f;
}

.radiance-status-note[data-tone="success"] {
    color: var(--heading);
}

.radiance-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.25rem;
}

.radiance-actions .btn {
    min-height: 50px;
    padding-inline: 1.2rem;
}

.radiance-hidden-submit {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
    padding: 0;
}

.radiance-inline-btn {
    min-height: 42px;
    padding-inline: 1rem;
    font-size: 0.88rem;
    white-space: nowrap;
}

.btn--secondary {
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn--secondary:hover {
    background: color-mix(in srgb, var(--section-bg) 86%, transparent);
    transform: translateY(-2px);
}

.radiance-progress.hidden,
.radiance-modal.hidden,
.radiance-modal__body .hidden {
    display: none;
}

.radiance-progress {
    margin-top: 1.2rem;
}

.radiance-progress__bar {
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: var(--radiance-progress-bg);
}

.radiance-progress__bar span {
    display: block;
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--heading) 82%, var(--surface)));
    transition: width 0.3s ease;
}

.radiance-progress__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem 1rem;
    justify-content: space-between;
    margin-top: 0.7rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.radiance-image-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.radiance-visual-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.95rem;
}

.radiance-visual-actions .btn[aria-disabled="true"] {
    opacity: 0.58;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
}

.radiance-image-card {
    overflow: hidden;
    border-radius: 20px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.radiance-image-card img {
    display: block;
    width: 100%;
    aspect-ratio: 1.18;
    object-fit: cover;
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--surface) 78%, transparent), transparent),
        linear-gradient(180deg, color-mix(in srgb, var(--accent) 10%, transparent), transparent);
    cursor: pointer;
}

.radiance-image-card figcaption {
    padding: 0.85rem 0.95rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.radiance-cost-card {
    margin-top: 1.15rem;
    padding: 1.1rem 1.15rem 1rem;
    border-radius: 22px;
    border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--radiance-panel-border));
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 16%, transparent), transparent 34%),
        linear-gradient(180deg, color-mix(in srgb, var(--surface) 93%, transparent), color-mix(in srgb, var(--section-bg) 90%, transparent));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.radiance-cost-card--empty {
    border-color: var(--radiance-panel-border);
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--surface) 92%, transparent), color-mix(in srgb, var(--section-bg) 88%, transparent));
}

.radiance-cost-card__head {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 1rem;
}

.radiance-cost-card__eyebrow {
    margin: 0 0 0.25rem;
    color: color-mix(in srgb, var(--muted) 78%, var(--heading));
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.radiance-cost-card h3 {
    margin: 0;
    font-family: var(--ff-heading);
    font-size: 1.05rem;
    color: var(--heading);
}

.radiance-cost-card__total-wrap {
    text-align: right;
    display: grid;
    gap: 0.18rem;
}

.radiance-cost-card__total-wrap strong {
    font-family: var(--ff-heading);
    font-size: clamp(1.6rem, 3vw, 2.3rem);
    line-height: 1;
    color: var(--heading);
}

.radiance-cost-card__total-wrap span {
    color: var(--muted);
    font-size: 0.86rem;
}

.radiance-cost-card__summary {
    margin: 0.8rem 0 0;
    color: var(--text);
    line-height: 1.55;
}

.radiance-cost-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.85rem;
}

.radiance-cost-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.7rem;
    margin-top: 0.9rem;
}

.radiance-cost-line {
    padding: 0.8rem 0.85rem;
    border-radius: 16px;
    border: 1px solid color-mix(in srgb, var(--radiance-panel-border) 86%, transparent);
    background: color-mix(in srgb, var(--surface) 84%, transparent);
}

.radiance-cost-line strong,
.radiance-cost-line span,
.radiance-cost-line em {
    display: block;
}

.radiance-cost-line strong {
    color: var(--heading);
    font-size: 0.96rem;
}

.radiance-cost-line span {
    margin-top: 0.18rem;
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.45;
}

.radiance-cost-line em {
    margin-top: 0.45rem;
    color: var(--heading);
    font-style: normal;
    font-weight: 700;
    font-size: 0.92rem;
}

.radiance-electrical {
    display: grid;
    gap: 1rem;
    min-height: 0;
}

.radiance-electrical__form,
.radiance-electrical__results {
    min-width: 0;
}

.radiance-electrical__form {
    display: grid;
    gap: 1rem;
}

.radiance-electrical__toolbar {
    display: grid;
    grid-template-columns: minmax(220px, 280px) auto;
    gap: 1rem;
    align-items: end;
}

.radiance-electrical__toolbar .radiance-field {
    margin-bottom: 0;
}

.radiance-electrical__toolbar .radiance-cost-card__actions {
    justify-content: flex-start;
    margin: 0;
}

.radiance-electrical__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.radiance-electrical__stage {
    padding: 0.95rem 1rem;
    border-radius: 18px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.radiance-electrical__stage h3 {
    margin: 0 0 0.8rem;
    font-family: var(--ff-heading);
    font-size: 0.98rem;
    color: var(--heading);
}

.radiance-electrical__results .radiance-cost-card {
    margin-top: 0;
}

.btn--attention {
    border-color: color-mix(in srgb, var(--danger) 72%, transparent);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--danger) 22%, transparent);
    animation: radianceButtonAttention 0.9s ease;
}

@keyframes radianceButtonAttention {
    0% {
        transform: translateY(0);
        box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 12%, transparent);
    }
    35% {
        transform: translateY(-1px);
        box-shadow: 0 0 0 6px color-mix(in srgb, var(--danger) 12%, transparent);
    }
    100% {
        transform: translateY(0);
        box-shadow: 0 0 0 1px color-mix(in srgb, var(--danger) 22%, transparent);
    }
}

.radiance-electrical__notes {
    display: grid;
    gap: 0.5rem;
    margin-top: 0.9rem;
}

.radiance-electrical__notes p {
    margin: 0;
    padding: 0.8rem 0.85rem;
    border-radius: 16px;
    border: 1px solid color-mix(in srgb, var(--radiance-panel-border) 86%, transparent);
    background: color-mix(in srgb, var(--surface) 84%, transparent);
    color: var(--muted);
    line-height: 1.5;
}

.radiance-output-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    align-items: stretch;
}

.radiance-output {
    margin: 0;
    padding: 1rem;
    border-radius: 18px;
    background: var(--radiance-output-bg);
    color: var(--radiance-output-text);
    overflow-y: auto;
    overflow-x: hidden;
    font-family: var(--ff-mono);
    font-size: 0.84rem;
    line-height: 1.55;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
    min-height: 320px;
}

.radiance-output--log {
    height: 320px;
}

.radiance-modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 1.2rem;
    background: rgba(4, 8, 14, 0.68);
    z-index: 1100;
}

.radiance-modal__card {
    width: min(1180px, 100%);
    border-radius: 24px;
    padding: 1.2rem;
    max-height: min(88vh, 980px);
    display: flex;
    flex-direction: column;
}

.radiance-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
    color: var(--heading);
}

.radiance-modal__header--metrics {
    align-items: start;
}

.radiance-modal__eyebrow {
    margin: 0 0 0.35rem;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-hover);
}

.radiance-modal__card--metrics {
    width: min(1180px, 100%);
    max-height: min(88vh, 980px);
    display: flex;
    flex-direction: column;
}

.radiance-modal__card--missing {
    width: min(680px, 100%);
}

.radiance-modal__card--runtime {
    width: min(760px, 100%);
}

.radiance-modal__card--about {
    width: min(920px, 100%);
}

.radiance-about {
    display: grid;
    gap: 1rem;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.radiance-about__subtitle {
    margin: 0.35rem 0 0;
    color: var(--muted);
    line-height: 1.55;
}

.demo-guide.hidden {
    display: none;
}

.demo-guide {
    position: fixed;
    inset: 0;
    z-index: 1250;
    pointer-events: none;
}

.demo-guide__highlight {
    position: fixed;
    border: 2px solid var(--accent);
    border-radius: 8px;
    box-shadow:
        0 0 0 9999px rgba(4, 8, 14, 0.54),
        0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent);
    transition: left 160ms ease, top 160ms ease, width 160ms ease, height 160ms ease;
}

.demo-guide__card {
    position: fixed;
    display: grid;
    gap: 0.72rem;
    width: min(380px, calc(100vw - 2rem));
    padding: 1rem;
    border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--radiance-panel-border));
    border-radius: 8px;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.34);
    color: var(--text);
    pointer-events: auto;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.demo-guide--prompt .demo-guide__card {
    right: 1.1rem;
    bottom: 1.1rem;
    left: auto;
    top: auto;
}

.demo-guide__eyebrow {
    margin: 0;
    color: var(--accent-hover);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.demo-guide__card h2 {
    margin: 0;
    color: var(--heading);
    font-family: var(--ff-heading);
    font-size: 1.18rem;
    line-height: 1.2;
    letter-spacing: 0;
}

.demo-guide__body {
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.demo-guide__progress {
    margin: 0;
    color: var(--accent-hover);
    font-size: 0.82rem;
    font-weight: 700;
}

.demo-guide__remember {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    width: fit-content;
    color: var(--text);
    font-size: 0.92rem;
}

.demo-guide__remember[hidden] {
    display: none;
}

.demo-guide__remember input {
    width: 1rem;
    height: 1rem;
    accent-color: var(--accent);
}

.demo-guide__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.55rem;
}

.radiance-about__intro,
.radiance-about__section {
    padding: 1rem;
    border-radius: 20px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 89%, transparent);
}

.radiance-about__intro {
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 14%, transparent), transparent 34%),
        linear-gradient(145deg, color-mix(in srgb, var(--surface) 92%, transparent), color-mix(in srgb, var(--section-bg) 86%, transparent));
}

.radiance-about h3 {
    margin: 0;
    font-family: var(--ff-heading);
    color: var(--heading);
}

.radiance-about p {
    margin: 0.55rem 0 0;
    color: var(--muted);
    line-height: 1.65;
}

.radiance-about a:not(.btn) {
    color: var(--accent-strong);
    font-weight: 700;
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--accent) 46%, transparent);
    text-underline-offset: 0.18em;
}

.radiance-about__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 1rem;
}

.radiance-about__highlights,
.radiance-about__section ul {
    display: grid;
    gap: 0.55rem;
    margin: 0.8rem 0 0;
    padding-left: 1.2rem;
    color: var(--text);
    line-height: 1.55;
}

.radiance-about__highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-left: 0;
    list-style: none;
}

.radiance-about__highlights li {
    position: relative;
    padding: 0.75rem 0.8rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, var(--radiance-panel-border) 86%, transparent);
    background: color-mix(in srgb, var(--section-bg) 72%, transparent);
    box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent);
    transition:
        transform var(--transition-speed),
        border-color var(--transition-speed),
        background-color var(--transition-speed),
        box-shadow var(--transition-speed);
}

.radiance-about__highlights li:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--accent) 44%, var(--radiance-panel-border));
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    box-shadow:
        inset 0 1px 0 color-mix(in srgb, white 7%, transparent),
        0 12px 24px color-mix(in srgb, var(--accent) 10%, transparent);
}

.radiance-about .btn--primary {
    color: #021418;
    text-decoration: none;
}

.radiance-about .btn--primary:hover {
    color: #021418;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 92%, white), var(--accent-hover));
    box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 22%, transparent);
}

.radiance-about__actions {
    justify-content: flex-end;
}

.radiance-missing-bundle {
    display: grid;
    gap: 1rem;
    overflow-y: auto;
}

.radiance-runtime {
    display: grid;
    gap: 1rem;
    overflow-y: auto;
}

.radiance-runtime__message,
.radiance-runtime__note {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.radiance-runtime__note {
    padding: 0.85rem 0.95rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--radiance-panel-border));
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.radiance-runtime__diagnostics {
    display: grid;
    gap: 0.45rem;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.radiance-runtime__diagnostics strong {
    color: var(--heading);
}

.radiance-runtime__commands {
    display: grid;
    gap: 0.75rem;
}

.radiance-missing-bundle p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.radiance-missing-bundle__facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    margin: 0;
}

.radiance-missing-bundle__facts div {
    min-width: 0;
    padding: 0.85rem;
    border-radius: 16px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.radiance-missing-bundle__facts dt {
    margin-bottom: 0.3rem;
    color: var(--accent-hover);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.radiance-missing-bundle__facts dd {
    margin: 0;
    color: var(--heading);
    font-weight: 700;
    overflow-wrap: anywhere;
}

.radiance-command-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
}

.radiance-command-row code {
    min-width: 0;
    padding: 0.85rem 0.95rem;
    border-radius: 14px;
    border: 1px solid var(--radiance-panel-border);
    background: var(--radiance-output-bg);
    color: var(--radiance-output-text);
    font-family: var(--ff-mono);
    font-size: 0.84rem;
    overflow-wrap: anywhere;
}

.radiance-modal__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.radiance-metrics-guide {
    overflow-y: auto;
    padding-right: 0.25rem;
}

.radiance-guide-hero {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 1rem;
    margin-bottom: 1.2rem;
    padding: 1rem;
    border-radius: 22px;
    border: 1px solid var(--radiance-panel-border);
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 14%, transparent), transparent 34%),
        linear-gradient(145deg, color-mix(in srgb, var(--surface) 92%, transparent), color-mix(in srgb, var(--section-bg) 86%, transparent));
}

.radiance-guide-hero h3,
.radiance-guide-section__head h3 {
    margin: 0;
    font-family: var(--ff-heading);
    color: var(--heading);
}

.radiance-guide-hero p,
.radiance-guide-section__head p {
    margin: 0.5rem 0 0;
    color: var(--muted);
    line-height: 1.65;
}

.radiance-guide-pillars {
    display: grid;
    gap: 0.8rem;
}

.radiance-guide-pillar {
    padding: 0.95rem 1rem;
    border-radius: 18px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.radiance-guide-pillar__label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-hover);
}

.radiance-guide-pillar strong {
    display: block;
    color: var(--heading);
    margin-bottom: 0.35rem;
}

.radiance-guide-pillar p {
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.radiance-guide-section {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 22px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--surface) 89%, transparent);
}

.radiance-guide-section--accent {
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 12%, transparent), transparent 32%),
        color-mix(in srgb, var(--surface) 90%, transparent);
}

.radiance-guide-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 1rem;
}

.radiance-guide-card {
    padding: 0.95rem 1rem;
    border-radius: 18px;
    border: 1px solid var(--radiance-panel-border);
    background: color-mix(in srgb, var(--section-bg) 72%, transparent);
}

.radiance-guide-card h4 {
    margin: 0;
    font-size: 0.96rem;
    font-family: var(--ff-heading);
    color: var(--heading);
}

.radiance-guide-card p {
    margin: 0.45rem 0 0;
    color: var(--text);
    line-height: 1.6;
}

.radiance-guide-card span {
    display: block;
    margin-top: 0.5rem;
    color: var(--muted);
    font-size: 0.84rem;
    line-height: 1.55;
}

.radiance-modal__body {
    min-height: 0;
    overflow: auto;
}

.radiance-modal__body--electrical {
    padding-right: 0.25rem;
}

.radiance-modal__body img,
.radiance-modal__body iframe,
.radiance-modal__body pre {
    width: 100%;
    min-height: 70vh;
    border: 0;
    border-radius: 18px;
    background: var(--radiance-output-bg);
}

.radiance-modal__body iframe {
    height: 70vh;
}

.radiance-modal--fullscreen {
    padding: 0;
}

.radiance-modal--fullscreen .radiance-modal__card {
    width: 100vw;
    height: 100vh;
    max-height: none;
    border-radius: 0;
    padding: 0.75rem;
}

.radiance-modal--fullscreen .radiance-modal__body {
    flex: 1;
}

.radiance-modal--fullscreen .radiance-modal__body iframe {
    height: 100%;
    min-height: 0;
    border-radius: 10px;
}

.radiance-modal__body pre {
    margin: 0;
    min-height: auto;
    max-height: min(72vh, 760px);
    overflow: auto;
    padding: 1rem;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

@media (max-width: 1200px) {
    .radiance-hero,
    .radiance-main,
    .radiance-output-grid {
        grid-template-columns: 1fr;
    }

    .radiance-hero h1 {
        max-width: none;
    }

    .radiance-guide-hero {
        grid-template-columns: 1fr;
    }

    .radiance-electrical__toolbar {
        grid-template-columns: 1fr;
    }

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

    .radiance-about__grid,
    .radiance-about__highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .radiance-shell {
        width: min(100%, calc(100% - 1.25rem));
        padding: calc(var(--nav-h) + 1rem) 0 3.5rem;
    }

    .radiance-hero,
    .radiance-panel,
    .radiance-modal__card {
        border-radius: 22px;
        padding: 1rem;
    }

    .radiance-form,
    .radiance-image-grid {
        grid-template-columns: 1fr;
    }

    .radiance-cost-card__head {
        display: grid;
        grid-template-columns: 1fr;
    }

    .radiance-cost-card__total-wrap {
        text-align: left;
    }

    .radiance-guide-grid {
        grid-template-columns: 1fr;
    }

    .demo-guide__card,
    .demo-guide--prompt .demo-guide__card {
        right: 0.75rem;
        left: 0.75rem;
        width: auto;
    }

    .demo-guide--prompt .demo-guide__card {
        top: calc(var(--nav-h) + 0.75rem);
        bottom: auto;
    }

    .demo-guide__actions {
        justify-content: stretch;
    }

    .demo-guide__actions .btn {
        flex: 1 1 auto;
    }

    .radiance-electrical__grid {
        grid-template-columns: 1fr;
    }

    .radiance-output {
        min-height: 260px;
    }

    .radiance-output--log {
        height: 260px;
    }
}