/* Design System Variables */
:root {
  --color-primary: #ffcae0;
  --color-secondary: #666666;
  --color-text: #1a1a1a;
  --color-bg: #ffffff;
  --color-border: #e0e0e0;
  --color-success: #28a745;
  --color-error: #dc3545;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  --transition: all 0.2s ease-in-out;

  /* === Responsive / Mobile improvements (added) === */
  --text-base: clamp(0.95rem, 1rem + 0.4vw, 1.125rem);
  --heading: clamp(1.25rem, 1.25rem + 1.2vw, 2rem);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(1.75rem, 2rem + 1.5vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 1.25rem + 1vw, 2rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-md);
}

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

a:hover {
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background-color: #f5f5f5;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

pre {
  background-color: #f5f5f5;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

img.banner {
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* Navigation */
.navbar {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  position: relative;
}

.navbar-list {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin: 0.25rem;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
  z-index: 30;
  box-shadow: var(--shadow-sm);
}

.navbar-list.open {
  display: flex;
}

.navbar-list a {
  font-weight: 500;
  transition: var(--transition);
  padding: var(--space-sm) var(--space-md);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
}

.navbar-list a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-list a.active {
  border: 2px solid var(--color-primary);
}

/* Menu button (visible on mobile) */
.menu-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  min-height: 44px; /* accessible touch target */
}

/* Responsive Layout */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg);
  text-align: center;
  flex: 1;
  width: 100%;
}

/* Lists */
main ul, main ol {
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

main li {
  margin-bottom: var(--space-sm);
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* SVG Curved Text */
.curved-text {
  width: 100%;
  max-width: 600px;
  margin: var(--space-xl) auto;
  display: block;
}

.curved-text-content {
  fill: var(--color-primary);
}

/* Forms */
form {
  max-width: 600px;
  margin: var(--space-xl) auto;
  text-align: left;
}

input, textarea, button {
  font-family: var(--font-sans);
  font-size: 1rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #fafafa;
  transition: var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

button {
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-md) var(--space-xl);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

button:hover {
  background-color: #0052a3;
  box-shadow: var(--shadow-md);
}

/* Footer */
footer {
  margin-top: auto;
  padding: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

footer a {
  font-weight: 500;
}

/* Home Footer */
.home-footer {
  margin-top: auto;
  padding: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

/* use fluid sizes */
html { font-size: 100%; }
body { font-size: var(--text-base); }

/* make heading sizes respond */
/* Nav: mobile-first collapsed menu */
.navbar {
  position: relative;
  padding: 0.5rem var(--space-md);
}

/* adjust existing nav list to be hidden by default on small screens */
.navbar-list {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin: 0.25rem;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
  z-index: 30;
  box-shadow: var(--shadow-sm);
}

.navbar-list.open {
  display: flex;
}

/* larger screens: show nav as before */
@media (min-width: 640px) {
  .menu-button { display: none; }
  .navbar { padding: var(--space-md) var(--space-lg); }

  /* Desktop nav: ensure it's centered and resets any mobile/open state */
  .navbar-list,
  .navbar-list.open {
    display: flex;
    position: static;
    flex-direction: row;
    gap: var(--space-lg);
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    margin: 0 auto;
    max-width: 1200px;
    justify-content: center;
    align-items: center;
  }
}

/* improve main spacing on small devices */
@media (max-width: 640px) {
  main {
    padding: var(--space-md);
    text-align: left;
  }

  .curved-text { max-width: 320px; margin: var(--space-lg) auto; }
}

/* medium / large breakpoints */
@media (min-width: 768px) {
  main { max-width: 900px; padding: var(--space-lg); }
}

@media (min-width: 1024px) {
  :root { --space-lg: 1.5rem; --space-xl: 2rem; }
  h1 { font-size: calc(var(--heading) + 0.25rem); }
}

/* small accessibility focus styles */
.menu-button:focus,
.navbar-list a:focus {
  outline: 3px solid rgba(0,0,0,0.08);
  outline-offset: 3px;
}