/* SamMcManus.net shared sticky header — Version 7 */

:root {
  --header-ink: #010302;
  --header-panel: #050a08;
  --header-line: #1a2924;
  --header-paper: #f3f4ec;
  --header-lime: #b8ff16;
  --header-cyan: #20e0d0;
}

/*
 * Light mode is the first-visit default. These selectors intentionally carry
 * more specificity than the page-level :root declarations used by the tools,
 * which lets one shared stylesheet theme the whole site without duplicating
 * theme code in every tool page.
 */
html:not([data-theme="dark"]) {
  color-scheme: light;
  --ink: #f7f8f3;
  --panel: #ffffff;
  --line: #d7ddd8;
  --muted: #5e6a65;
  --paper: #151b18;
  --lime: #4f7600;
  --cyan: #007f77;
  --surface: #ffffff;
  --surface-2: #eef2ed;
  --border: #d7ddd8;
  --text: #151b18;
  --text-muted: #5e6a65;
  --accent: #4f7600;
  --accent-hover: #3f6100;
  --accent-2: #007f77;
  --success: #4f7600;
  --project-ink: #f7f8f3;
  --project-panel: #ffffff;
  --project-line: #d7ddd8;
  --project-muted: #5e6a65;
  --project-paper: #151b18;
  --project-lime: #4f7600;
  --project-cyan: #007f77;
  --header-ink: #f7f8f3;
  --header-panel: #ffffff;
  --header-line: #d7ddd8;
  --header-paper: #151b18;
  --header-lime: #4f7600;
  --header-cyan: #007f77;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

[data-header-placeholder] {
  position: sticky;
  z-index: 1000;
  top: 0;
  width: 100%;
}

[data-header-placeholder] *,
[data-header-placeholder] *::before,
[data-header-placeholder] *::after {
  box-sizing: border-box;
}

[data-header-placeholder] a {
  color: inherit;
  text-decoration: none;
}

body.tools-drawer-open {
  overflow: hidden;
}

.site-header {
  position: relative;
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(24px, 4vw, 72px);
  border-bottom: 1px solid var(--header-line);
  background: rgba(1, 3, 2, 0.94);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

html:not([data-theme="dark"]) .site-header {
  background: rgba(247, 248, 243, 0.94);
  box-shadow: 0 8px 28px rgba(18, 35, 28, 0.09);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--header-paper);
  letter-spacing: 0.08em;
}

.site-brand b {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--header-cyan);
  color: var(--header-cyan);
  font-size: 11px;
}

.site-brand span {
  font-size: 14px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  height: 100%;
  color: var(--header-paper);
  font-size: 14px;
}

.site-nav a {
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--header-cyan);
}

.site-outline {
  padding: 12px 18px;
  border: 1px solid rgba(184, 255, 22, 0.42);
}

html:not([data-theme="dark"]) .site-outline {
  border-color: rgba(79, 118, 0, 0.42);
}

.site-outline:hover,
.site-outline:focus-visible {
  border-color: var(--header-lime);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid transparent;
  background: transparent;
  color: var(--header-paper);
  cursor: pointer;
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--header-cyan);
  background: rgba(32, 224, 208, 0.06);
  color: var(--header-cyan);
  outline: none;
}

.theme-toggle:active {
  transform: translateY(1px);
}

.theme-icon {
  display: grid;
  place-items: center;
  grid-area: 1 / 1;
}

.theme-icon svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-icon-sun {
  display: none;
}

html[data-theme="dark"] .theme-icon-moon {
  display: none;
}

html[data-theme="dark"] .theme-icon-sun {
  display: grid;
}

.tools-menu {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.tools-menu summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  height: 100%;
  padding: 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}

.tools-menu summary::-webkit-details-marker {
  display: none;
}

.tools-menu summary:hover,
.tools-menu summary:focus-visible,
.tools-menu[open] summary {
  color: var(--header-cyan);
}

.tools-backdrop,
.tools-drawer-head {
  display: none;
}

.tools-popover {
  position: absolute;
  top: calc(100% - 1px);
  left: -18px;
  width: 270px;
  padding: 8px;
  border: 1px solid #263a33;
  background: var(--header-panel);
  box-shadow: 0 22px 54px rgba(0, 0, 0, 0.72);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    visibility 0.18s ease;
}

html:not([data-theme="dark"]) .tools-popover {
  border-color: #c8d2cb;
  box-shadow: 0 18px 44px rgba(18, 35, 28, 0.13);
}

.tools-popover::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 25px;
  width: 52px;
  height: 2px;
  background: var(--header-lime);
}

.tools-menu[open] .tools-popover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

/* Hover-open is desktop-only so iOS does not require a second tap. */
@media (hover: hover) and (pointer: fine) {
  .tools-menu:hover summary,
  .tools-menu:focus-within summary {
    color: var(--header-cyan);
  }

  .tools-menu:hover .tools-popover,
  .tools-menu:focus-within .tools-popover {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
}

.tool-card {
  display: block;
  padding: 13px 14px;
  border-left: 2px solid transparent;
  color: var(--header-paper);
  font-size: 13px;
  line-height: 1.35;
  transition:
    color 0.18s ease,
    border-color 0.18s ease,
    background-color 0.18s ease;
}

.tool-card:hover,
.tool-card:focus-visible {
  border-left-color: var(--header-lime);
  background: rgba(32, 224, 208, 0.08);
  color: var(--header-cyan);
  outline: none;
}

.tool-card[aria-current="page"] {
  border-left-color: var(--header-lime);
  background: rgba(184, 255, 22, 0.05);
  color: var(--header-lime);
}

html:not([data-theme="dark"]) .tool-card[aria-current="page"] {
  background: rgba(79, 118, 0, 0.08);
}

.tool-copy {
  display: block;
  font-weight: 700;
}

/* Homepage and shared-content light-mode surfaces. */
html:not([data-theme="dark"]) body {
  background: var(--ink);
  color: var(--paper);
}

html:not([data-theme="dark"]) .systems {
  background:
    radial-gradient(circle at 51% 42%, rgba(0, 127, 119, 0.08), transparent 39%),
    linear-gradient(rgba(20, 45, 35, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 45, 35, 0.07) 1px, transparent 1px),
    #f1f5f0;
  background-size: auto, 36px 36px, 36px 36px, auto;
}

html:not([data-theme="dark"]) .systems::after {
  background: radial-gradient(circle at center, transparent 52%, rgba(231, 238, 232, 0.62) 100%);
}

html:not([data-theme="dark"]) .node-surface {
  fill: rgba(255, 255, 255, 0.98);
  stroke: #a9bbb2;
}

html:not([data-theme="dark"]) .map-node:hover .node-surface,
html:not([data-theme="dark"]) .about-map-node:hover .node-surface {
  fill: #f7faf7;
}

html:not([data-theme="dark"]) .node-index,
html:not([data-theme="dark"]) .node-label,
html:not([data-theme="dark"]) .about-map-heading {
  fill: #52635b;
}

html:not([data-theme="dark"]) .ticker {
  background: #eef2ed;
  color: #5e6a65;
}

html:not([data-theme="dark"]) .cards article {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(233, 239, 234, 0.38));
}

html:not([data-theme="dark"]) .cards article > span {
  color: #64736c;
}

html:not([data-theme="dark"]) .about {
  background: #f1f5f0;
}

html:not([data-theme="dark"]) .about-blueprint {
  border-color: var(--line);
  background:
    linear-gradient(rgba(20, 45, 35, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 45, 35, 0.08) 1px, transparent 1px),
    #f7f8f3;
  background-size: 28px 28px;
}

html:not([data-theme="dark"]) .about-blueprint::after {
  background: radial-gradient(circle at 50% 48%, transparent 48%, rgba(226, 234, 227, 0.64) 100%);
}

html:not([data-theme="dark"]) .social-link {
  border-color: #b4c0ba;
}

html:not([data-theme="dark"]) .contact {
  background: radial-gradient(circle at 50% 110%, rgba(79, 118, 0, 0.10), transparent 42%), #f7f8f3;
}

html:not([data-theme="dark"]) footer {
  background: #f7f8f3;
  color: #5e6a65;
}

html:not([data-theme="dark"]) .button,
html:not([data-theme="dark"]) .project-dialog .button {
  color: #ffffff;
}

html:not([data-theme="dark"]) .button:hover,
html:not([data-theme="dark"]) .project-dialog .button:hover {
  color: var(--lime);
}

/* Shared project form light mode. */
html:not([data-theme="dark"]) .project-dialog {
  border-color: #c3cec7;
  background: #ffffff;
  color: var(--project-paper);
  box-shadow: 0 28px 90px rgba(18, 35, 28, 0.18);
}

html:not([data-theme="dark"]) .project-dialog::backdrop {
  background: rgba(21, 27, 24, 0.38);
}

html:not([data-theme="dark"]) .project-dialog .dialog-close {
  border-color: #bdc9c1;
}

html:not([data-theme="dark"]) .project-dialog .form-grid label {
  color: #34423b;
}

html:not([data-theme="dark"]) .project-dialog .form-grid label span {
  color: #6b7771;
}

html:not([data-theme="dark"]) .project-dialog .form-grid input,
html:not([data-theme="dark"]) .project-dialog .form-grid textarea {
  border-color: #cbd4ce;
  background: #f4f7f3;
  color: var(--project-paper);
}

html:not([data-theme="dark"]) .form-toast {
  border-color: #b8c4bc;
  background: rgba(255, 255, 255, 0.98);
  color: var(--project-paper);
  box-shadow: 0 12px 34px rgba(18, 35, 28, 0.14);
}

@media (max-width: 700px) {
  .site-header {
    height: 70px;
    padding: 0 16px;
  }

  .site-brand span {
    font-size: 12px;
  }

  .site-header .site-nav {
    gap: 8px;
  }

  /* Keep shared-header links visible even when a page has legacy nav rules. */
  .site-header .site-nav > a {
    display: inline-flex;
    align-items: center;
  }

  .site-header .tools-menu {
    height: auto;
  }

  .site-header .tools-menu-label {
    display: none;
  }

  /* About, Tools, Start a Project, and theme toggle share one mobile control style. */
  .site-header .site-nav > a,
  .site-header .tools-menu summary,
  .site-header .theme-toggle {
    width: auto;
    min-height: 40px;
    height: 40px;
    padding: 0 11px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #2f4740;
    color: var(--header-paper);
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
  }

  .site-header .theme-toggle {
    width: 40px;
    padding: 0;
  }

  html:not([data-theme="dark"]) .site-header .site-nav > a,
  html:not([data-theme="dark"]) .site-header .tools-menu summary,
  html:not([data-theme="dark"]) .site-header .theme-toggle {
    border-color: #bdc9c1;
  }

  .site-header .site-outline {
    border-color: #2f4740;
  }

  html:not([data-theme="dark"]) .site-header .site-outline {
    border-color: #bdc9c1;
  }

  .site-header .tools-menu summary::before {
    content: "Tools";
    color: inherit;
    font-size: inherit;
    font-weight: inherit;
    letter-spacing: 0;
  }

  .site-header .site-nav > a:hover,
  .site-header .site-nav > a:focus-visible,
  .site-header .tools-menu summary:hover,
  .site-header .tools-menu summary:focus-visible,
  .site-header .tools-menu[open] summary,
  .site-header .theme-toggle:hover,
  .site-header .theme-toggle:focus-visible {
    border-color: var(--header-cyan);
    color: var(--header-cyan);
    background: rgba(32, 224, 208, 0.06);
  }

  /* Mobile tools drawer backdrop. */
  .site-header .tools-backdrop {
    display: block;
    position: fixed;
    z-index: 1001;
    top: 70px;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 0;
    border: 0;
    background: rgba(0, 0, 0, 0.62);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity 0.22s ease,
      visibility 0.22s ease;
    -webkit-tap-highlight-color: transparent;
  }

  html:not([data-theme="dark"]) .site-header .tools-backdrop {
    background: rgba(21, 27, 24, 0.34);
  }

  .site-header .tools-menu[open] .tools-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  /* Slide-in menu replaces the dropdown on mobile. */
  .site-header .tools-popover {
    position: fixed;
    z-index: 1002;
    top: 70px;
    right: 0;
    bottom: 0;
    left: auto;
    width: min(86vw, 360px);
    height: calc(100dvh - 70px);
    max-height: none;
    padding: 0 0 max(20px, env(safe-area-inset-bottom));
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 0;
    border-left: 1px solid #263a33;
    background: rgba(5, 10, 8, 0.99);
    box-shadow: -22px 0 54px rgba(0, 0, 0, 0.5);
    opacity: 1;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(100%);
    transition:
      transform 0.24s ease,
      visibility 0.24s ease;
  }

  html:not([data-theme="dark"]) .site-header .tools-popover {
    border-left-color: #c8d2cb;
    background: rgba(255, 255, 255, 0.99);
    box-shadow: -18px 0 44px rgba(18, 35, 28, 0.14);
  }

  .site-header .tools-popover::before {
    display: none;
  }

  .site-header .tools-menu[open] .tools-popover {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
  }

  .site-header .tools-drawer-head {
    position: sticky;
    z-index: 1;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    padding: 0 18px;
    border-bottom: 1px solid var(--header-line);
    background: rgba(5, 10, 8, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  html:not([data-theme="dark"]) .site-header .tools-drawer-head {
    background: rgba(255, 255, 255, 0.98);
  }

  .site-header .tools-drawer-title {
    color: var(--header-paper);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .site-header .tools-close {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid #2f4740;
    background: transparent;
    color: var(--header-paper);
    cursor: pointer;
    font: inherit;
    font-size: 24px;
    line-height: 1;
  }

  html:not([data-theme="dark"]) .site-header .tools-close {
    border-color: #bdc9c1;
  }

  .site-header .tools-close:hover,
  .site-header .tools-close:focus-visible {
    border-color: var(--header-cyan);
    color: var(--header-cyan);
    outline: none;
  }

  .site-header .tool-card {
    padding: 16px 18px;
    border-bottom: 1px solid rgba(38, 58, 51, 0.58);
    border-left-width: 3px;
    font-size: 14px;
  }

  html:not([data-theme="dark"]) .site-header .tool-card {
    border-bottom-color: rgba(99, 119, 108, 0.22);
  }
}

@media (max-width: 560px) {
  .site-header .site-nav > a:not(.site-outline) {
    display: none;
  }

  .site-header .site-nav {
    gap: 7px;
  }
}

@media (max-width: 430px) {
  .site-brand span {
    display: none;
  }

  .site-header .site-nav {
    gap: 6px;
  }

  .site-header .site-nav > a,
  .site-header .tools-menu summary {
    padding: 0 9px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tools-popover,
  .tools-backdrop,
  .theme-toggle {
    transition: none !important;
  }
}