/* ==========================================================================
   Hot Shot Command — shared styles
   Mobile-first, no external dependencies, CSS custom properties throughout
   ========================================================================== */

/* --------------------------------------------------------------------------
   Custom properties
   -------------------------------------------------------------------------- */
:root {
  --color-bg:           #ffffff;
  --color-surface:      #f5f7fa;
  --color-border:       #d1d9e0;
  --color-text:         #1a1f2e;
  --color-text-muted:   #4a5568;
  --color-accent:       #1a56db;
  --color-accent-hover: #1547c0;
  --color-accent-light: #e8f0fe;
  --color-error:        #c53030;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
               sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo,
               Consolas, monospace;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --max-width:      760px;
  --nav-height:     56px;
  --transition-std: 0.18s ease;
}

/* --------------------------------------------------------------------------
   Reset / base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-std);
}

a:hover, a:focus-visible {
  color: var(--color-accent-hover);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul, ol {
  padding-left: var(--space-6);
}

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

main {
  flex: 1;
}

/* --------------------------------------------------------------------------
   Skip link (accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  z-index: 9999;
  transition: top var(--transition-std);
}

.skip-link:focus {
  top: 0;
}

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

/* --------------------------------------------------------------------------
   Site header / nav
   -------------------------------------------------------------------------- */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  padding-block: var(--space-2);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.site-nav-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-nav-brand:hover,
.site-nav-brand:focus-visible {
  color: var(--color-accent);
}

.site-nav-links {
  list-style: none;
  padding: 0;
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}

.site-nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-std), border-color var(--transition-std);
}

.site-nav-links a:hover,
.site-nav-links a:focus-visible,
.site-nav-links a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Hero section
   -------------------------------------------------------------------------- */
.hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-16) var(--space-4);
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* --------------------------------------------------------------------------
   Button
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background var(--transition-std), box-shadow var(--transition-std);
  border: none;
  cursor: pointer;
}

.btn:hover, .btn:focus-visible {
  background: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--color-accent-light);
  color: var(--color-accent-hover);
  box-shadow: none;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* --------------------------------------------------------------------------
   Card
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

/* --------------------------------------------------------------------------
   Content / prose sections
   -------------------------------------------------------------------------- */
.section {
  padding: var(--space-12) var(--space-4);
}

.section + .section {
  padding-top: 0;
}

.section-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 600px) {
  .section-grid--2col {
    grid-template-columns: 1fr 1fr;
  }
}

.section-grid .card h2 {
  font-size: 1.05rem;
  margin-bottom: var(--space-2);
}

/* --------------------------------------------------------------------------
   Page heading (inner pages)
   -------------------------------------------------------------------------- */
.page-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-12) var(--space-4) var(--space-8);
}

.page-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: var(--space-2);
}

.page-header p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   Prose (long-form content like privacy policy)
   -------------------------------------------------------------------------- */
.prose {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4);
}

.prose h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: var(--space-8);
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.prose p,
.prose li {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-4);
}

.prose strong {
  color: var(--color-text);
  font-weight: 600;
}

.prose a {
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Notice / callout box
   -------------------------------------------------------------------------- */
.notice {
  background: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.notice strong {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Contact info block
   -------------------------------------------------------------------------- */
.contact-block {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.contact-block h2 {
  font-size: 1.4rem;
  margin-bottom: var(--space-2);
}

.contact-block p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   Site footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) var(--space-4);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-accent);
}

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

/* --------------------------------------------------------------------------
   404 page
   -------------------------------------------------------------------------- */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 60vh;
  padding: var(--space-8) var(--space-4);
  gap: var(--space-4);
}

.error-page .error-code {
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-border);
  letter-spacing: -0.04em;
}

.error-page h1 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  margin-bottom: var(--space-2);
}

.error-page p {
  color: var(--color-text-muted);
  max-width: 400px;
  margin-bottom: var(--space-6);
}