:root {
    --app-bg: #0b1018;
    --panel-bg: #111925;
    --panel-raised: #172231;
    --panel-border: #263447;
    --control-bg: #0d1520;
    --control-border: #35475d;
    --text: #edf3fa;
    --label: #b8c5d4;
    --muted: #8fa0b5;
    --accent: #4fd1c5;
    --accent-strong: #20b8aa;
    --focus: rgba(79, 209, 197, 0.22);
    --danger: #ff8b8b;
}

html,
body {
    min-height: 100%;
    margin: 0;
    background: var(--app-bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14px;
}

body {
    overflow-x: hidden;
}

.app-navbar {
    position: sticky;
    top: 0;
    z-index: 40;
    min-height: 58px;
    padding: 0 24px;
    background: #101824;
    border-bottom: 1px solid var(--panel-border);
}

.app-navbar .navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.brand-mark {
    display: inline-grid;
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    place-items: center;
    border-radius: 8px;
    background: var(--accent);
    color: #071513;
    font-size: 0.9rem;
}

.app-navbar .navbar-toggler {
    border-color: var(--panel-border);
}

.app-navbar .nav-link {
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 650;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus,
.app-link,
.app-link:hover,
.app-link:focus {
    color: var(--accent);
}

.app-navbar .nav-link-danger {
    color: var(--danger);
}

.app-link {
    font-weight: 700;
    text-decoration: none;
}

/* Main simulator dashboard; shared by local Python, local Docker, and Pi builds. */
.dashboard-shell {
    display: grid;
    grid-template-columns: minmax(280px, 320px) minmax(0, 1fr) minmax(280px, 320px);
    min-height: calc(100vh - 58px);
}

.parameter-sidebar {
    height: calc(100vh - 58px);
    padding: 22px 18px 32px;
    overflow-y: auto;
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    scrollbar-width: thin;
    scrollbar-color: var(--control-border) transparent;
}

.parameter-sidebar-right {
    border-right: 0;
    border-left: 1px solid var(--panel-border);
}

.sidebar-heading,
.graph-heading,
.results-heading {
    margin: 0;
    color: var(--text);
    font-weight: 700;
}

.sidebar-heading {
    font-size: 1rem;
}

.sidebar-copy,
.graph-subtitle,
.results-header p {
    margin: 5px 0 18px;
    color: var(--muted);
    font-size: 0.82rem;
}

.parameter-panel {
    margin-bottom: 12px;
    overflow: hidden;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--panel-raised);
}

.parameter-panel summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 13px 14px;
    color: var(--text);
    cursor: pointer;
    font-weight: 650;
    list-style: none;
}

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

.parameter-panel summary::after {
    content: "+";
    order: 3;
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 400;
}

.parameter-panel[open] summary::after {
    content: "\2212";
}

.speaker-key {
    margin-left: auto;
    padding: 3px 7px;
    border-radius: 999px;
    font-size: 0.66rem;
    font-weight: 700;
}

.speaker-key-1 {
    background: rgba(27, 158, 119, 0.16);
    color: #56c9a7;
}

.speaker-key-2 {
    background: rgba(217, 95, 2, 0.16);
    color: #f0a36b;
}

.parameter-panel-body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 12px 14px 15px;
    border-top: 1px solid var(--panel-border);
}

.field-row {
    min-width: 0;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    overflow: hidden;
    color: var(--label);
    font-size: 0.72rem;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.form-control,
.form-select,
.form-control.bg-dark,
.form-select.bg-dark {
    min-height: 34px;
    border: 1px solid var(--control-border) !important;
    border-radius: 7px;
    background-color: var(--control-bg) !important;
    color: var(--text) !important;
    font-size: 0.78rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent) !important;
    background-color: var(--control-bg) !important;
    color: var(--text) !important;
    box-shadow: 0 0 0 3px var(--focus);
}

.form-control::placeholder {
    color: #66778d;
}

.field-error {
    margin-top: 4px;
    color: var(--danger);
    font-size: 0.7rem;
    line-height: 1.3;
}

.btn-analyze {
    width: 100%;
    min-height: 38px;
    margin-top: 2px;
    border: 0;
    border-radius: 7px;
    background: var(--accent);
    color: #071513;
    font-weight: 700;
}

.btn-analyze:hover,
.btn-analyze:focus {
    background: var(--accent-strong);
    color: #04100e;
}

.graph-workspace {
    height: calc(100vh - 58px);
    min-width: 0;
    padding: 24px clamp(18px, 3vw, 42px) 42px;
    overflow-y: auto;
    background: radial-gradient(circle at top right, #142131 0, var(--app-bg) 38%);
}

.graph-header,
.results-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.graph-header {
    margin-bottom: 16px;
}

.graph-badges {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 8px;
}

.graph-heading {
    font-size: 1.35rem;
}

.grid-badge {
    flex: 0 0 auto;
    padding: 7px 10px;
    border: 1px solid var(--panel-border);
    border-radius: 999px;
    background: var(--panel-raised);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
}

.demo-timer-badge {
    flex: 0 0 auto;
    padding: 7px 10px;
    border: 1px solid rgba(250, 204, 21, 0.5);
    border-radius: 999px;
    background: rgba(250, 204, 21, 0.1);
    color: #fde68a;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.status-banner {
    position: relative;
    margin-bottom: 16px;
    padding: 11px 42px 11px 14px;
    border: 1px solid rgba(79, 209, 197, 0.35);
    border-radius: 8px;
    background: rgba(79, 209, 197, 0.08);
    color: #cbeeea;
}

.status-danger,
.status-error {
    border-color: rgba(255, 139, 139, 0.4);
    background: rgba(255, 139, 139, 0.08);
    color: #ffd0d0;
}

.graph-card {
    min-width: 0;
    padding: 14px;
    overflow: hidden;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

.sim-bokeh-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(2, minmax(250px, 1fr));
    gap: 8px;
    width: 100%;
    height: clamp(540px, calc(100vh - 160px), 760px);
    min-height: 540px;
}

.sim-bokeh-cell {
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.graph-area > div,
.sim-bokeh-cell .bk-root,
.sim-bokeh-cell .bk {
    width: 100% !important;
    max-width: 100%;
    height: 100% !important;
    max-height: 100%;
}

.graph-placeholder {
    display: grid;
    min-height: 430px;
    place-items: center;
    padding: 36px;
    border: 1px dashed var(--control-border);
    border-radius: 10px;
    background: #0e1621;
    color: var(--muted);
    text-align: center;
}

.graph-placeholder strong {
    display: block;
    color: var(--text);
}

.graph-placeholder p {
    margin: 6px 0 0;
}

.placeholder-icon {
    display: block;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 2rem;
}

.results-panel {
    margin-top: 18px;
    padding: 16px;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    background: var(--panel-bg);
}

.results-heading {
    font-size: 1rem;
}

.results-header p {
    margin-bottom: 12px;
}

.btn-secondary-action {
    min-height: 32px;
    padding: 5px 13px;
    border: 1px solid var(--accent);
    border-radius: 7px;
    background: transparent;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
}

.btn-secondary-action:hover,
.btn-secondary-action:focus,
.btn-secondary-action:active {
    border-color: var(--accent) !important;
    background: var(--accent) !important;
    color: #071513 !important;
    box-shadow: 0 0 0 3px var(--focus);
}

.constants-table-scroll {
    max-width: 100%;
    overflow-x: auto;
}

.constants-wide-table {
    width: max-content;
    min-width: 100%;
    font-size: clamp(0.58rem, 0.5rem + 0.25vw, 0.75rem);
}

.constants-wide-table th,
.constants-wide-table td {
    padding: 6px;
    border-color: var(--panel-border) !important;
    white-space: nowrap;
}

.constants-wide-table output {
    display: inline;
    color: inherit;
    font-size: inherit;
    font-weight: 700;
}

.constants-row-1 > * {
    color: #56c9a7 !important;
}

.constants-row-2 > * {
    color: #f0a36b !important;
}

.table-dark {
    --bs-table-color: var(--text);
    --bs-table-bg: var(--panel-bg);
    --bs-table-striped-bg: var(--panel-raised);
    --bs-table-striped-color: var(--text);
    --bs-table-hover-bg: #1d2b3d;
    --bs-table-hover-color: var(--text);
    --bs-table-border-color: var(--panel-border);
}

.save-run-form {
    margin-top: 14px;
}

.save-run-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
}

/* Authentication and saved-simulation screens use the same raised panels. */
.content-page,
.auth-page {
    width: min(1180px, calc(100% - 32px));
    margin: 34px auto;
}

.auth-page {
    width: min(440px, calc(100% - 32px));
}

.card,
.card.bg-dark,
.card-body.bg-dark {
    border-color: var(--panel-border) !important;
    background-color: var(--panel-bg) !important;
    color: var(--text);
}

.card-header,
.card-footer,
.border-secondary,
.table-bordered > :not(caption) > * > * {
    border-color: var(--panel-border) !important;
}

.section-heading,
.text-light {
    color: var(--text) !important;
}

.text-muted,
.text-secondary {
    color: var(--muted) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.btn-danger {
    border-color: var(--danger);
    background: transparent;
    color: var(--danger);
}

.btn-danger:hover,
.btn-danger:focus {
    border-color: var(--danger);
    background: var(--danger);
    color: #fff;
}

@media (max-width: 1200px) {
    .dashboard-shell {
        grid-template-columns: 1fr;
    }

    .parameter-sidebar,
    .graph-workspace {
        height: auto;
        overflow-y: visible;
    }

    .parameter-sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--panel-border);
    }

    .parameter-sidebar-right {
        order: 2;
        border-top: 0;
        border-bottom: 1px solid var(--panel-border);
        border-left: 0;
    }

    .graph-workspace {
        order: 3;
    }
}

@media (max-width: 900px) {
    .sim-bokeh-grid {
        height: auto;
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, minmax(300px, 42vh));
    }
}

@media (max-width: 560px) {
    .app-navbar {
        padding: 0 16px;
    }

    .app-navbar .navbar-brand span:last-child {
        font-size: 0.86rem;
    }

    .parameter-panel-body {
        grid-template-columns: 1fr;
    }

    .graph-header,
    .results-header {
        display: block;
    }

    .grid-badge {
        display: inline-block;
        margin-top: 8px;
    }

    .graph-badges {
        justify-content: flex-start;
        margin-top: 8px;
    }

    .graph-badges .grid-badge {
        margin-top: 0;
    }

    .graph-card {
        padding: 6px;
    }

    .sim-bokeh-grid {
        grid-template-rows: repeat(4, minmax(280px, 48vh));
    }
}