:root {
  color-scheme: light dark;
  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --color-bg: #f4f6fb;
  --color-bg-elevated: #ffffff;
  --color-bg-muted: #e8ecf4;
  --color-text: #12151c;
  --color-text-muted: #5c6575;
  --color-accent: #4f7bff;
  --color-accent-hover: #3b66e8;
  --color-accent-muted: #e8eeff;
  --color-border: #d5dbe6;
  --color-border-strong: #b8c0ce;
  --color-border-focus: #4f7bff;
  --color-success: #059669;
  --color-danger: #dc2626;
  --color-dot: rgb(18 21 28 / 8%);
  --max-width: 960px;
  --radius: 0.25rem;
  --transition: 0.15s ease-in-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #07080b;
    --color-bg-elevated: #0e1117;
    --color-bg-muted: #161a22;
    --color-text: #f4f6fb;
    --color-text-muted: #99a3b4;
    --color-accent: #4f7bff;
    --color-accent-hover: #6b90ff;
    --color-accent-muted: #16213d;
    --color-border: #20262f;
    --color-border-strong: #2e3742;
    --color-border-focus: #4f7bff;
    --color-success: #34d399;
    --color-danger: #f87171;
    --color-dot: rgb(255 255 255 / 3.5%);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  color-scheme: light dark;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  background-image: radial-gradient(
    circle,
    var(--color-dot) 1px,
    transparent 1px
  );
  background-size: 22px 22px;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

header {
  background: color-mix(in srgb, var(--color-bg-elevated) 80%, transparent);
  border-top: 2px solid var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

nav a {
  margin-left: 1.25rem;
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color var(--transition);
}

nav a:hover,
nav a.active {
  color: var(--color-accent);
}

main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.hero {
  text-align: center;
  padding: 2.5rem 0 3rem;
}

.hero h1,
h2,
.card h3 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition), box-shadow var(--transition);
  font-size: 1rem;
  touch-action: manipulation;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    background-color: var(--color-accent-hover);
    box-shadow:
      0 0 0 1px rgb(79 123 255 / 55%),
      0 10px 34px -12px rgb(79 123 255 / 40%);
  }
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

@media (hover: hover) and (pointer: fine) {
  .btn-secondary:hover {
    background-color: var(--color-accent-muted);
    color: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: none;
  }
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.card h3 {
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.card .price {
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 0.75rem;
  font-size: 16px;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 30%, transparent);
}

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

.alert {
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.alert-success {
  background-color: color-mix(in srgb, var(--color-success) 12%, transparent);
  color: var(--color-success);
  border: 1px solid color-mix(in srgb, var(--color-success) 35%, transparent);
}

.alert-error {
  background-color: color-mix(in srgb, var(--color-danger) 12%, transparent);
  color: var(--color-danger);
  border: 1px solid color-mix(in srgb, var(--color-danger) 35%, transparent);
}

footer {
  background: color-mix(in srgb, var(--color-bg-elevated) 80%, transparent);
  border-top: 1px solid var(--color-border-strong);
  padding: 2rem 1.5rem;
  margin-top: auto;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

footer p + p {
  margin-top: 0.5rem;
}

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

button,
a[href],
[role="button"] {
  touch-action: manipulation;
}