.layout-generator-page {
    background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 12%, transparent), transparent 28%),
        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"] {
    --layout-panel-bg: rgba(255, 255, 255, 0.84);
    --layout-panel-border: rgba(11, 18, 32, 0.08);
    --layout-shadow: 0 20px 45px rgba(11, 18, 32, 0.08);
    --layout-grid-line: rgba(11, 18, 32, 0.05);
    --layout-node-fill: #f5f7fa;
    --layout-node-stroke: #314055;
    --layout-node-glow: rgba(49, 64, 85, 0.08);
    --layout-group-0: #253246;
    --layout-group-1: #3b5168;
    --layout-group-2: #4a6161;
    --layout-group-3: #6a5d49;
    --layout-group-4: #566278;
    --layout-group-5: #5e5350;
    --layout-group-6: #516674;
    --layout-group-7: #60586b;
}

html[data-theme="dark"] {
    --layout-panel-bg: rgba(20, 28, 39, 0.82);
    --layout-panel-border: rgba(247, 250, 255, 0.08);
    --layout-shadow: 0 22px 50px rgba(0, 0, 0, 0.32);
    --layout-grid-line: rgba(255, 255, 255, 0.07);
    --layout-node-fill: #16202d;
    --layout-node-stroke: #d7dee8;
    --layout-node-glow: rgba(215, 222, 232, 0.08);
    --layout-group-0: #c7d0db;
    --layout-group-1: #9eb0c2;
    --layout-group-2: #9fbcbc;
    --layout-group-3: #c1b49a;
    --layout-group-4: #aab4ca;
    --layout-group-5: #b9aaa6;
    --layout-group-6: #9eb8c8;
    --layout-group-7: #b5adbf;
}

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

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

.layout-hero,
.layout-controls,
.layout-preview-panel {
    border-radius: 28px;
}

.layout-hero {
    position: relative;
    overflow: hidden;
    margin-bottom: 1.5rem;
    padding: clamp(2rem, 4vw, 3.5rem);
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--surface) 85%, transparent), color-mix(in srgb, var(--section-bg) 86%, transparent)),
        linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent);
    border: 1px solid var(--layout-panel-border);
    box-shadow: var(--layout-shadow);
}

.layout-hero::after {
    content: "";
    position: absolute;
    inset: auto -10% -45% auto;
    width: min(420px, 48vw);
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 20%, transparent) 0%, transparent 70%);
    pointer-events: none;
}

.layout-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);
}

.layout-hero h1 {
    position: relative;
    z-index: 1;
    margin: 0;
    max-width: 12ch;
    font-family: var(--ff-heading);
    font-size: clamp(2.4rem, 5vw, 4.5rem);
    line-height: 0.96;
    color: var(--heading);
}

.layout-hero__lede {
    position: relative;
    z-index: 1;
    max-width: 62ch;
    margin: 1.2rem 0 0;
    color: var(--muted);
    font-size: 1.02rem;
    line-height: 1.75;
}

.layout-controls,
.layout-preview-panel {
    padding: clamp(1.25rem, 2vw, 1.8rem);
}

.layout-controls {
    margin-bottom: 1.5rem;
}

.layout-form {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: space-between;
    gap: 1rem 1.25rem;
}

.layout-form__inputs {
    display: grid;
    grid-template-columns: repeat(2, minmax(180px, 220px));
    gap: 1rem;
}

.layout-field {
    display: grid;
    gap: 0.55rem;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--heading);
}

.layout-field span {
    color: var(--muted);
}

.layout-field input {
    width: 100%;
    min-height: 54px;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    color: var(--text);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

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

.layout-form__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0.8rem 1rem;
    margin-left: auto;
}

.layout-form__submit {
    min-height: 54px;
    padding-inline: 1.5rem;
}

.layout-form__submit:disabled {
    opacity: 0.7;
    cursor: progress;
    transform: none;
}

.layout-status {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
}

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

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

.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin: 1.4rem 0 0;
}

.summary-card {
    padding: 1rem 1.05rem;
    border-radius: 18px;
    border: 1px solid var(--layout-panel-border);
    background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.summary-label {
    display: block;
    margin-bottom: 0.55rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.summary-card strong {
    font-size: clamp(1.25rem, 2.4vw, 1.9rem);
    font-family: var(--ff-heading);
    color: var(--heading);
}

.module-panel {
    margin-top: 1.4rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--layout-panel-border);
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.section-head h2 {
    margin: 0;
    font-family: var(--ff-heading);
    font-size: 1.2rem;
    color: var(--heading);
}

.section-head p {
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.section-head--preview {
    margin-bottom: 1.1rem;
}

.module-counts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.module-counts.empty,
.preview-empty {
    color: var(--muted);
}

.count-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.95rem 1rem;
    border-radius: 16px;
    border: 1px solid var(--layout-panel-border);
    background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.count-chip span {
    color: var(--muted);
    font-size: 0.9rem;
}

.count-chip strong {
    color: var(--heading);
    font-family: var(--ff-heading);
    font-size: 1.1rem;
}

.layout-preview-panel {
    overflow: hidden;
}

.layout-preview {
    min-height: 760px;
    padding: 1.25rem;
    border-radius: 22px;
    border: 1px solid var(--layout-panel-border);
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--surface) 88%, transparent), color-mix(in srgb, var(--section-bg) 88%, transparent)),
        repeating-linear-gradient(
            45deg,
            var(--layout-grid-line),
            var(--layout-grid-line) 14px,
            transparent 14px,
            transparent 28px
        );
    overflow: auto;
    display: grid;
    place-items: center;
}

.preview-empty {
    font-size: 1rem;
}

.layout-preview svg {
    width: min(100%, 1800px);
    height: auto;
    display: block;
}

.layout-link {
    fill: none;
    stroke-width: 4.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.78;
}

.layout-node {
    fill: var(--layout-node-fill);
    stroke: var(--layout-node-stroke);
    stroke-width: 1.6;
    filter: drop-shadow(0 0 6px var(--layout-node-glow));
}

@media (max-width: 1100px) {
    .layout-form {
        align-items: stretch;
    }

    .layout-form__actions {
        width: 100%;
        justify-content: space-between;
        margin-left: 0;
    }

    .layout-preview {
        min-height: 620px;
    }
}

@media (max-width: 720px) {
    .layout-shell {
        width: min(100% - 1rem, 1440px);
        padding-top: calc(var(--nav-h) + 1rem);
        padding-bottom: 4rem;
    }

    .layout-hero,
    .layout-controls,
    .layout-preview-panel {
        border-radius: 22px;
    }

    .layout-hero {
        padding: 1.4rem;
    }

    .layout-hero h1 {
        max-width: none;
        font-size: clamp(2rem, 10vw, 2.9rem);
    }

    .layout-form__inputs,
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .layout-form__actions {
        align-items: stretch;
    }

    .layout-form__submit {
        width: 100%;
        justify-content: center;
    }

    .layout-preview {
        min-height: 460px;
        padding: 0.8rem;
    }
}