/* Copyright (c) 2026 PPN Corporation. All rights reserved. Licensed under the Apache License, Version 2.0. */

/* Base reset, typography, page header, layout utilities and shared form controls (AtmosOS style).
   Load after tokens.css and fonts.css. Colours come from tokens only; hairlines use --line. */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, figure {
  margin: 0;
}

h1, h2, h3 {
  color: var(--text-primary);
  font-weight: 600;
}

ul, ol {
  padding: 0;
  list-style: none;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

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

input, select, textarea {
  background-color: var(--control-bg);
  color: var(--text-primary);
  border-color: var(--control-border);
}

::selection {
  background-color: hsl(var(--primary) / 0.28);
  color: var(--text-primary);
}

/* Screen-reader only: visually hidden, still announced. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus ring for interactive elements that have no component-specific one. */
:where(a, button, input, select, textarea, summary, [role="button"], [tabindex]:not([tabindex="-1"])):focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Thin, themed scrollbars (WebKit + Firefox). */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background-color: var(--border-strong);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 999px;
}
*::-webkit-scrollbar-thumb:hover { background-color: var(--control-border); }

/* Page header: title, hint line and trailing actions. Copied from AtmosOS admin.css. */

.ad-page__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: nowrap;
}

.ad-page__head > *:first-child { min-width: 0; }

.ad-page__title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.ad-page__title:focus,
.ad-page__title:focus-visible {
  outline: none;
}

.ad-page__hint {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.ad-page__hint--warn {
  color: var(--warning);
}

.ad-page__head-acts {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 0 0 auto;
}

/* Phones: the actions drop under the title. Literal 768px, as in AtmosOS (tablet step). */
@media (max-width: 768px) {
  .ad-page__head { flex-wrap: wrap; gap: 10px; }
}

/* Layout */

.ui-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(190px, 100%), 1fr));
  gap: var(--gap);
}

.ui-grid-wide {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
  gap: var(--gap);
}

.ui-stack {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;
}

.ui-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap);
  min-width: 0;
}

.ui-spacer {
  flex: 1;
}

/* Text */

.ui-muted {
  color: var(--text-muted);
}

.ui-mono {
  font-family: var(--mono);
  font-size: 0.95em;
}

.ui-tone-accent {
  color: var(--accent);
}

.ui-tone-ok {
  color: var(--success);
}

.ui-tone-warn {
  color: var(--warning);
}

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

/* Form controls (shared by UiTextInput, UiNumberInput and UiSelect). Same treatment as AtmosOS .ad-input. */

.ui-input,
.ui-select {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--control-border);
  border-radius: var(--radius-sm);
  background: var(--control-bg);
  color: var(--text-primary);
  box-shadow: inset 0 0 0 1px var(--border-subtle);
  transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.ui-input:hover:not(:disabled),
.ui-select:hover:not(:disabled) {
  background: var(--control-bg-hover);
  border-color: var(--control-border-hover);
}

.ui-input:focus,
.ui-select:focus {
  outline: none;
  background: var(--control-bg-hover);
  border-color: var(--accent);
  box-shadow: var(--focus-ring), inset 0 0 0 1px var(--accent);
}

.ui-input::placeholder {
  color: var(--text-muted);
}

.ui-input:disabled,
.ui-select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

@media (max-width: 360px) {
  body {
    font-size: 13px;
  }
}

/* Phones: two stats per row instead of one tall column. Literal 520px, n12d-specific. */
@media (max-width: 520px) {
  .ui-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
}