:root {
    color-scheme: light;
    /* Authoritative UI tokens. Keep compatibility aliases below until every
       module consumes the ui-* contract directly. */
    --ui-color-sidebar: #ffffff;
    --ui-color-canvas: #f4f6f8;
    --ui-color-surface: #ffffff;
    --ui-color-surface-subtle: #f8fafb;
    --ui-color-heading: #18232f;
    --ui-color-ink: #18232f;
    --ui-color-text: #3f4d5e;
    --ui-color-text-muted: #5d6b7a;
    --ui-color-text-subtle: #5d6b7a;
    --ui-color-border: #dfe5eb;
    --ui-color-border-subtle: #e7ebf0;
    --ui-color-action: #08745b;
    --ui-color-action-hover: #06634e;
    --ui-color-accent: #08745b;
    --ui-color-accent-subtle: #e7f5ef;
    --ui-color-on-action: #ffffff;
    --ui-color-positive: #08745b;
    --ui-color-positive-subtle: #e7f5ef;
    --ui-color-warning: #925b0c;
    --ui-color-warning-border: #e6c579;
    --ui-color-warning-subtle: #fff2dc;
    --ui-color-danger: #a8322a;
    --ui-color-danger-border: #f0b8b2;
    --ui-color-danger-subtle: #fff0ee;
    --ui-color-info: #315f9f;
    --ui-color-info-border: #bfd0ef;
    --ui-color-info-subtle: #edf3ff;
    --ui-color-neutral: #536174;
    --ui-color-neutral-subtle: #edf1f5;
    --ui-color-disabled: #eef1f4;
    --ui-color-backdrop: rgb(24 35 47 / 42%);
    --ui-color-client-shell-text: #f7fbf9;
    --ui-color-client-shell-glow: #214c40;
    --ui-color-client-shell-background-start: #081813;
    --ui-color-client-shell-background-end: #102c24;
    --ui-color-client-shell-surface: rgb(8 24 19 / 78%);
    --ui-color-client-shell-surface-border: rgb(255 255 255 / 14%);
    --ui-color-client-shell-shadow: rgb(0 0 0 / 30%);
    --ui-color-client-shell-accent: #8ee0bd;
    --ui-color-client-shell-text-muted: #c6d7d0;
    --ui-color-client-shell-track: rgb(255 255 255 / 12%);
    --ui-color-client-shell-secondary-border: rgb(255 255 255 / 28%);
    --ui-color-client-shell-danger: #ffd1cc;
    --ui-color-client-shell-option-border: rgb(255 255 255 / 18%);
    --ui-color-client-shell-option-surface: rgb(255 255 255 / 7%);
    --ui-color-client-shell-option-hover: rgb(142 224 189 / 12%);
    --ui-color-client-shell-option-text-muted: #b7cbc3;
    --ui-color-client-shell-toolbar-border: rgb(255 255 255 / 24%);
    --ui-color-onboarding-ink: #10231e;
    --ui-color-onboarding-canvas: #f2f6f4;
    --ui-color-onboarding-card-shadow: rgb(12 33 28 / 10%);
    --ui-color-onboarding-action: #0c4a3c;
    --ui-color-onboarding-text-muted: #49665e;
    --ui-color-onboarding-border: #9aada7;
    --ui-color-onboarding-danger: #9b1c1c;
    --ui-focus-ring: #0d7b5a;
    --ui-space-1: 0.25rem;
    --ui-space-2: 0.5rem;
    --ui-space-3: 0.75rem;
    --ui-space-4: 1rem;
    --ui-space-5: 1.5rem;
    --ui-space-6: 2rem;
    --ui-control-height: 2.75rem;
    --ui-page-width-narrow: 48rem;
    --ui-page-width-standard: 74rem;
    --ui-page-width-wide: 96rem;
    --ui-page-width-full: 110rem;
    --ui-page-gap: clamp(1rem, 2vw, 1.5rem);
    --ui-page-padding-block-end: 3.5rem;
    --ui-transition-fast: 150ms ease;
    --ui-z-dialog: 2000;
    --ui-color-border-strong: #b8c4d0;
    --ui-radius-sm: 0.5rem;
    --ui-radius-md: 0.625rem;
    --ui-radius-lg: 0.75rem;
    --ui-shadow-sm: 0 1px 2px rgb(24 35 47 / 3%);
    --ui-shadow-md: 0 4px 16px rgb(24 35 47 / 8%);
    --ui-shadow-lg: 0 16px 48px rgb(24 35 47 / 16%);
    --ui-font-sans: "Segoe UI Variable", "Segoe UI", Inter, Aptos, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --sidebar-width: 15rem;
    --topbar-height: 4rem;
    --color-sidebar: var(--ui-color-sidebar);
    --color-canvas: var(--ui-color-canvas);
    --color-surface: var(--ui-color-surface);
    --color-surface-soft: var(--ui-color-surface-subtle);
    --color-heading: var(--ui-color-heading);
    --color-ink: var(--ui-color-ink);
    --color-text: var(--ui-color-text);
    --color-text-muted: var(--ui-color-text-muted);
    --color-text-subtle: var(--ui-color-text-subtle);
    --color-border: var(--ui-color-border);
    --color-border-soft: var(--ui-color-border-subtle);
    --color-brand: var(--ui-color-accent);
    --color-brand-deep: var(--ui-color-action);
    --color-brand-strong: var(--ui-color-action);
    --color-brand-soft: var(--ui-color-accent-subtle);
    --color-warning: var(--ui-color-warning);
    --color-warning-soft: var(--ui-color-warning-subtle);
    --color-danger: var(--ui-color-danger);
    --color-danger-soft: var(--ui-color-danger-subtle);
    --color-info: var(--ui-color-info);
    --color-info-soft: var(--ui-color-info-subtle);
    --color-muted: var(--ui-color-text-muted);
    --color-surface-muted: var(--ui-color-surface-subtle);
    --color-primary-soft: var(--ui-color-accent-subtle);
    --color-primary-strong: var(--ui-color-action);
    --border-subtle: var(--ui-color-border);
    --text-muted: var(--ui-color-text-muted);
    --surface: var(--ui-color-surface);
    --evidio-accent: var(--ui-color-action);
    --evidio-color-primary: var(--ui-color-action);
    --evidio-color-ink: var(--ui-color-ink);
    --evidio-color-muted: var(--ui-color-text-muted);
    --radius-sm: var(--ui-radius-sm);
    --radius-md: var(--ui-radius-md);
    --radius-lg: var(--ui-radius-lg);
    --shadow-sm: var(--ui-shadow-sm);
    --shadow-md: var(--ui-shadow-md);
    --shadow-lg: var(--ui-shadow-lg);
    font-family: var(--ui-font-sans);
    font-synthesis: none;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 20rem;
    min-height: 100%;
    background: var(--color-canvas);
    scroll-behavior: smooth;
}

body {
    min-width: 20rem;
    min-height: 100%;
    margin: 0;
    background: var(--color-canvas);
    color: var(--color-text);
    font-size: 0.9375rem;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--color-brand-deep);
}

a:hover {
    color: var(--ui-color-action-hover);
}

:focus-visible {
    outline: 3px solid var(--ui-focus-ring);
    outline-offset: 2px;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
h2,
h3 {
    color: var(--color-heading);
    line-height: 1.2;
}

button:disabled,
[aria-disabled="true"] {
    cursor: not-allowed;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    clip-path: inset(50%) !important;
    white-space: nowrap !important;
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.page-heading {
    max-width: 49rem;
}

.page-eyebrow {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.45rem;
    color: var(--color-brand-deep);
    font-size: 0.72rem;
    font-weight: 650;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.page-title {
    margin-bottom: 0.5rem;
    font-size: clamp(1.6rem, 2.5vw, 2rem);
    font-weight: 650;
    letter-spacing: -0.035em;
}

.page-title:focus,
h1[tabindex="-1"]:focus { outline: none; }

.page-description {
    max-width: 44rem;
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.page-header-actions {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.65rem;
}

.ui-button,
.button {
    display: inline-flex;
    min-height: var(--ui-control-height);
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: 1px solid transparent;
    border-radius: var(--ui-radius-sm);
    padding: 0.58rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    transition:
        background-color var(--ui-transition-fast),
        border-color var(--ui-transition-fast),
        color var(--ui-transition-fast),
        transform var(--ui-transition-fast);
}

.ui-button--primary,
.button-primary {
    border-color: var(--color-brand-deep);
    background: var(--color-brand-deep);
    color: var(--ui-color-on-action);
    box-shadow: var(--ui-shadow-sm);
}

.ui-button--primary:hover,
.button-primary:hover {
    background: var(--ui-color-action-hover);
    color: var(--ui-color-on-action);
}

.ui-button--secondary,
.button-secondary {
    border-color: var(--color-border);
    background: var(--color-surface);
    color: var(--color-heading);
}

.ui-button--secondary:hover,
.button-secondary:hover {
    border-color: var(--ui-color-border-strong);
    background: var(--color-surface-soft);
    color: var(--color-heading);
}

.ui-button--danger {
    border-color: var(--ui-color-danger);
    background: var(--ui-color-surface);
    color: var(--ui-color-danger);
}

.ui-button--danger:hover {
    background: var(--ui-color-danger-subtle);
    color: var(--ui-color-danger);
}

.ui-button--ghost {
    border-color: transparent;
    background: transparent;
    color: var(--ui-color-action);
}

.ui-button--ghost:hover {
    background: var(--ui-color-accent-subtle);
    color: var(--ui-color-action);
}

.ui-button:disabled,
.ui-button[aria-disabled="true"],
.button:disabled {
    border-color: var(--color-border);
    background: var(--ui-color-disabled);
    box-shadow: none;
    color: var(--color-text-subtle);
    opacity: 1;
}

.ui-button--compact {
    min-height: 2.25rem;
    padding: 0.42rem 0.7rem;
}

.surface-card {
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.section-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.section-heading h2 {
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
    font-weight: 650;
    letter-spacing: -0.018em;
}

.section-heading p {
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 0.74rem;
}

.placeholder-label {
    display: inline-flex;
    min-height: 1.55rem;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: 99rem;
    background: var(--color-surface-soft);
    color: var(--color-text-muted);
    padding: 0.2rem 0.52rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.status-chip {
    display: inline-flex;
    min-height: 1.55rem;
    align-items: center;
    gap: 0.35rem;
    border-radius: 99rem;
    padding: 0.2rem 0.55rem;
    font-size: 0.72rem;
    font-weight: 600;
    white-space: nowrap;
}

.status-chip::before {
    width: 0.38rem;
    height: 0.38rem;
    border-radius: 50%;
    background: currentColor;
    content: "";
}

.status-positive {
    background: var(--ui-color-positive-subtle);
    color: var(--ui-color-positive);
}

.status-warning {
    background: var(--ui-color-warning-subtle);
    color: var(--ui-color-warning);
}

.status-neutral {
    background: var(--ui-color-neutral-subtle);
    color: var(--ui-color-neutral);
}

.status-danger {
    background: var(--ui-color-danger-subtle);
    color: var(--ui-color-danger);
}

.status-info {
    background: var(--ui-color-info-subtle);
    color: var(--ui-color-info);
}

.valid.modified:not([type="checkbox"]) {
    outline: 2px solid var(--ui-color-positive);
}

.invalid {
    outline: 2px solid var(--ui-color-danger);
}

.validation-message {
    color: var(--ui-color-danger);
}

.session-notice {
    border: 1px solid var(--ui-color-warning-border);
    border-radius: var(--radius-sm);
    background: var(--ui-color-warning-subtle);
    color: var(--ui-color-warning);
    padding: 0.75rem 0.85rem;
    font-size: 0.8rem;
}

.blazor-error-boundary {
    border: 1px solid var(--ui-color-danger-border);
    border-radius: var(--radius-md);
    background: var(--ui-color-danger-subtle);
    color: var(--ui-color-danger);
    padding: 1rem;
}

.blazor-error-boundary::after {
    content: "Došlo k neočekávané chybě.";
}

@media (max-width: 600px) {
    .page-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 1.45rem;
    }

    .page-header-actions {
        width: 100%;
    }

    .page-header-actions :is(.button, .ui-button) {
        flex: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (forced-colors: active) {
    * {
        box-shadow: none !important;
    }
}