/*
 * Picnic-bk modern foundation (Wave 1).
 * This file intentionally contains only shared tokens, helpers and opt-in
 * primitives. Component migrations stay in their own page stylesheets.
 */
:root {
    /* Existing modern palette, exposed first as stable foundation aliases. */
    --ui-color-canvas: #121212;
    --ui-color-surface: #1e1e1e;
    --ui-color-surface-raised: #2a2a2a;
    --ui-color-accent: #ff9e44;
    --ui-color-accent-hover: #ffae5d;
    --ui-color-accent-soft: rgba(255, 158, 68, 0.15);
    --ui-color-text: #f5f5f5;
    --ui-color-muted: #aaaaaa;
    --ui-color-danger: #e0245e;
    --ui-color-surface-hover: #242424;
    --ui-color-placeholder: #888;
    --ui-color-border-subtle: rgba(255, 255, 255, 0.065);
    --ui-color-border: rgba(255, 255, 255, 0.12);
    --ui-color-border-accent-soft: rgba(255, 158, 68, 0.24);

    /* Compatibility aliases: no broad colour migration is made in Wave 1. */
    --bg-dark: var(--ui-color-canvas);
    --bg-elements: var(--ui-color-surface);
    --bg-elements-light: var(--ui-color-surface-raised);
    --primary: var(--ui-color-accent);
    --primary-glow: var(--ui-color-accent-soft);
    --text-primary: var(--ui-color-text);
    --text-secondary: var(--ui-color-muted);
    --error: var(--ui-color-danger);

    --ui-radius-control: 8px;
    --ui-radius-surface: 12px;
    --ui-radius-media: 8px;
    --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-control-height: 44px;
    --ui-shadow-shell: 0 4px 20px rgba(0, 0, 0, 0.25);
    --ui-shadow-normal: 0 5px 15px rgba(0, 0, 0, 0.2);
    --ui-shadow-elevated: 0 10px 30px rgba(0, 0, 0, 0.3);
    --ui-shadow-surface: 0 12px 36px rgba(0, 0, 0, 0.45);
    --ui-motion-fast: 180ms;
    --ui-motion-base: 260ms;
    --ui-motion-entrance: 560ms;
    --ui-ease-out: cubic-bezier(.22, 1, .36, 1);
    --transition: all var(--ui-motion-base) var(--ui-ease-out);
    --ui-focus-outline: 3px solid var(--ui-color-accent);
    --ui-focus-offset: 3px;
    --ui-z-sticky: 10;
    --ui-z-dropdown: 20;
    --ui-z-drawer: 40;
    --ui-z-modal: 50;
    --ui-z-consent: 60;
    --picnic-cookie-clearance: 0px;
}

/* Only pages explicitly marked modern receive this lightweight shell reset. */
body.modern-page,
body.modern-page *,
body.modern-page *::before,
body.modern-page *::after {
    box-sizing: border-box;
}

body.modern-page {
    margin: 0;
    padding-bottom: var(--picnic-cookie-clearance);
    color: var(--ui-color-text);
    background: var(--ui-color-canvas);
    font-family: Nunito, Arial, sans-serif;
}

/* The selector is deliberately scoped to known shell and primitive controls. */
:where(.site-header, .site-mobile-nav, .site-footer, #picnic-cookie-consent, .ui-button, .ui-control, .ui-icon-button, .ui-modal-surface) :focus-visible,
:where(.site-header__logo, .site-header__avatar-trigger, .site-header__notification, .site-header__burger, .site-mobile-nav__close) :focus-visible,
.ui-focusable:focus-visible {
    outline: var(--ui-focus-outline);
    outline-offset: var(--ui-focus-offset);
}

.ui-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.ui-icon-button {
    width: var(--ui-control-height);
    min-width: var(--ui-control-height);
    height: var(--ui-control-height);
    min-height: var(--ui-control-height);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    color: inherit;
    background: transparent;
    font: inherit;
    cursor: pointer;
}

.ui-button {
    min-height: var(--ui-control-height);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--ui-space-2);
    padding: 0.55rem 1rem;
    border: 1px solid transparent;
    border-radius: var(--ui-radius-control);
    font: 700 1rem/1.2 Nunito, Arial, sans-serif;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--ui-motion-fast) var(--ui-ease-out), color var(--ui-motion-fast) var(--ui-ease-out), border-color var(--ui-motion-fast) var(--ui-ease-out);
}

.ui-button--primary {
    color: var(--ui-color-canvas);
    background: var(--ui-color-accent);
}

.ui-button--secondary {
    color: var(--ui-color-accent);
    background: transparent;
    border-color: var(--ui-color-accent);
}

@media (hover: hover) and (pointer: fine) {
    .ui-button--primary:hover { background: var(--ui-color-accent-hover); }
    .ui-button--secondary:hover { background: rgba(255, 158, 68, 0.08); }
}

.ui-button:disabled,
.ui-button[aria-disabled="true"] {
    opacity: 0.55;
    cursor: not-allowed;
}

.ui-control {
    min-height: 42px;
    border: 1px solid var(--ui-color-border);
    border-radius: var(--ui-radius-control);
    color: var(--ui-color-text);
    background: var(--ui-color-surface);
}

.ui-control:focus-visible {
    outline: var(--ui-focus-outline);
    outline-offset: var(--ui-focus-offset);
    border-color: var(--ui-color-accent);
}

.ui-alert {
    border-left: 3px solid var(--ui-color-accent);
    border-radius: var(--ui-radius-control);
    color: var(--ui-color-text);
    background: var(--ui-color-surface);
}

.ui-alert--error { border-left-color: var(--ui-color-danger); }
.ui-alert--success { border-left-color: var(--ui-color-accent); }

.ui-modal-surface {
    border-radius: var(--ui-radius-surface);
    background: var(--ui-color-surface-raised);
    box-shadow: var(--ui-shadow-surface);
}

.ui-section-heading {
    margin: 0;
    color: var(--ui-color-text);
}

@media (prefers-reduced-motion: reduce) {
    .ui-button,
    .ui-icon-button,
    .site-header,
    .site-mobile-nav,
    .site-mobile-nav__overlay {
        transition-duration: 1ms !important;
        scroll-behavior: auto;
    }
}