/* Sirloop.com — single stylesheet, mobile-first, no external fonts */

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

html,
body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd,
ul,
ol {
  margin: 0;
  padding: 0;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
}

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

body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  line-height: 1.6;
}

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

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

/* --- Custom properties --- */
:root {
  --color-bg: #0b0e14;
  --color-bg-elevated: #10141d;
  --color-surface: #151a26;
  --color-surface-hover: #1a2030;
  --color-border: #262d3d;
  --color-border-strong: #38415a;
  --color-text: #e8ecf4;
  --color-text-muted: #9da8c0;
  --color-accent: #6ee7b7;
  --color-accent-strong: #34d399;
  --color-accent-dim: rgba(110, 231, 183, 0.12);
  --color-link: #8fc0fb;

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

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4.5rem;

  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 68rem;
}

/* --- Base --- */
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
}

h1,
h2,
h3 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.125rem, 6vw, 3.375rem);
  max-width: 22ch;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.125rem);
}

h3 {
  font-size: 1.125rem;
}

p {
  color: var(--color-text-muted);
}

a {
  color: var(--color-link);
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-accent-dim);
  color: var(--color-accent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  font-family: var(--font-mono);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  font-size: 0.9375rem;
  line-height: 1.7;
}

pre code {
  background: none;
  color: var(--color-text);
  padding: 0;
  font-size: inherit;
}

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

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

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

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--color-border);
  background: rgba(11, 14, 20, 0.92);
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-3);
  flex-wrap: wrap;
}

.brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

.brand-accent {
  color: var(--color-accent);
}

.site-nav ul {
  display: flex;
  gap: var(--space-3) var(--space-4);
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 120ms ease;
}

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

/* --- Hero --- */
.hero {
  padding-block: var(--space-6);
  background:
    radial-gradient(60rem 30rem at 85% -20%, rgba(110, 231, 183, 0.09), transparent 60%),
    radial-gradient(50rem 26rem at 0% 110%, rgba(143, 192, 251, 0.07), transparent 60%);
  border-bottom: 1px solid var(--color-border);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid rgba(110, 231, 183, 0.25);
  border-radius: 999px;
  padding: 0.3em 0.9em;
  margin-bottom: var(--space-3);
}

.hero .lede {
  max-width: 44rem;
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  margin-top: var(--space-3);
}

.hero-note {
  margin-top: var(--space-4);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --- Buttons --- */
.actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.actions-center {
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 120ms ease, border-color 120ms ease,
    transform 120ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-accent);
  color: #05261b;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-accent-strong);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--color-text-muted);
  background: var(--color-surface);
}

/* --- Sections --- */
.section {
  padding-block: var(--space-6);
}

.section-alt {
  background: var(--color-bg-elevated);
  border-block: 1px solid var(--color-border);
}

.section-lede {
  max-width: 42rem;
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
  font-size: 1.0625rem;
}

/* --- Feature cards --- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: border-color 150ms ease, background 150ms ease,
    transform 150ms ease;
}

.card:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid rgba(110, 231, 183, 0.25);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.card h3 {
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.card p {
  font-size: 0.95rem;
}

/* --- How it works --- */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
  counter-reset: step;
}

.step {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.step-num {
  flex: none;
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid rgba(110, 231, 183, 0.25);
  border-radius: 999px;
}

.step h3 {
  margin-bottom: var(--space-1);
}

.step p {
  font-size: 0.95rem;
  max-width: 34rem;
}

/* --- CTA --- */
.cta {
  text-align: center;
}

.cta .section-lede {
  margin-inline: auto;
}

.cta pre {
  display: inline-block;
  text-align: left;
  margin-top: var(--space-3);
  max-width: 100%;
}

/* --- Not-found page --- */
.not-found {
  text-align: center;
  padding-block: var(--space-6);
}

.not-found h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  color: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.site-footer ul {
  display: flex;
  gap: var(--space-3) var(--space-4);
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 120ms ease;
}

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

/* --- Responsive --- */
@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps {
    gap: var(--space-5);
  }
}

@media (min-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .card p {
    font-size: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .card,
  .site-nav a,
  .site-footer a {
    transition: none;
  }

  .card:hover {
    transform: none;
  }
}