/* ============================================
   Cloud & Code — main.css
   Design system: black/white, square edges
   ============================================ */

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

[hidden] { display: none !important; }

:root {
  --black: #000;
  --white: #fff;
  --grey: #555;
  --light: #f5f5f5;
  --border: 1px solid #000;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --container-width: 1200px;
  --container-pad: clamp(1.25rem, 5vw, 3rem);
  --section-pad: clamp(4rem, 8vw, 7rem);
}

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

body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.container--narrow {
  max-width: 740px;
}

/* --- Typography scale --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: var(--border);
  border-radius: 0;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

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

.btn--outline {
  background: var(--white);
  color: var(--black);
}
.btn--outline:hover,
.btn--outline:focus-visible {
  background: var(--black);
  color: var(--white);
}

.btn--inverted {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}
.btn--inverted:hover,
.btn--inverted:focus-visible {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* --- Section title (eyebrow label) --- */
.section-title {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}

/* --- Focus ring --- */
:focus-visible {
  outline: 2px solid var(--black);
  outline-offset: 3px;
}

/* ============================================
   Nav
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 28px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--black);
  transition: opacity 0.15s;
}
.nav__link:hover { opacity: 0.5; }

.nav__cta { margin-left: 0.5rem; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--black);
}

/* Mobile nav drawer */
.nav__mobile {
  border-top: var(--border);
  padding: 0.5rem var(--container-pad) 1rem;
  display: flex;
  flex-direction: column;
}

.nav__mobile-link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--black);
  border-bottom: var(--border);
}
.nav__mobile-link:last-child { border-bottom: none; }

.nav__mobile-cta {
  font-weight: 700;
  margin-top: 0.5rem;
  border-bottom: none;
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: var(--section-pad) 0;
  border-bottom: var(--border);
}

.hero__headline {
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--grey);
  max-width: 55ch;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* ============================================
   Services
   ============================================ */
.services {
  padding: var(--section-pad) 0;
  border-bottom: var(--border);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  border-top: var(--border);
  border-left: var(--border);
}

.service-card {
  padding: 2rem;
  border-right: var(--border);
  border-bottom: var(--border);
}

.service-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.875rem;
  letter-spacing: -0.01em;
}

.service-card__body {
  font-size: 0.9375rem;
  color: var(--grey);
  line-height: 1.65;
}

.service-card--cta {
  display: flex;
  flex-direction: column;
}

.service-card__btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ============================================
   DX Philosophy
   ============================================ */
.dx-philosophy {
  padding: var(--section-pad) 0;
  border-bottom: var(--border);
}

.dx-philosophy__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.dx-philosophy__statement {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.dx-philosophy__right p {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--grey);
}

@media (max-width: 768px) {
  .dx-philosophy__inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ============================================
   Kubernetes (inverted)
   ============================================ */
.kubernetes {
  padding: var(--section-pad) 0;
  background: var(--black);
  color: var(--white);
}

.kubernetes__headline {
  font-size: clamp(1.75rem, 4vw, 3rem);
  letter-spacing: -0.025em;
  max-width: 22ch;
  margin-bottom: 1.25rem;
}

.kubernetes__body {
  font-size: 1.0625rem;
  max-width: 65ch;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 2.5rem;
}

.kubernetes__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--white);
  letter-spacing: 0.03em;
  border-radius: 0;
}

/* ============================================
   How it works
   ============================================ */
.how-it-works {
  padding: var(--section-pad) 0;
  border-bottom: var(--border);
}

.steps {
  list-style: none;
}

.step {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: var(--border);
  align-items: start;
}
.step:first-child { border-top: var(--border); }

.step__number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--grey);
  padding-top: 0.3rem;
}

.step__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.step__body {
  font-size: 0.9375rem;
  color: var(--grey);
  line-height: 1.65;
}

@media (max-width: 480px) {
  .step {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ============================================
   Blog preview
   ============================================ */
.blog-preview {
  padding: var(--section-pad) 0;
  border-bottom: var(--border);
}

.blog-preview__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.blog-preview__all {
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--black);
  transition: opacity 0.15s;
}
.blog-preview__all:hover { opacity: 0.5; }

.blog-preview__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  border-top: var(--border);
  border-left: var(--border);
  margin-top: 2rem;
}

.blog-preview__empty {
  color: var(--grey);
  font-size: 0.9375rem;
  padding-top: 2.5rem;
}

/* Post card (shared: blog preview + blog list) */
.post-card {
  border-right: var(--border);
  border-bottom: var(--border);
}

.post-card__link {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  text-decoration: none;
  color: var(--black);
  height: 100%;
  transition: background 0.15s;
}
.post-card__link:hover { background: var(--light); }

.post-card__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--grey);
  letter-spacing: 0.05em;
  margin-bottom: 0.875rem;
}

.post-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.875rem;
  letter-spacing: -0.01em;
  line-height: 1.3;
  flex-grow: 1;
}

.post-card__excerpt {
  font-size: 0.9375rem;
  color: var(--grey);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.post-card__read {
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: auto;
}

/* ============================================
   CTA (inverted)
   ============================================ */
.cta {
  padding: var(--section-pad) 0;
  background: var(--black);
  color: var(--white);
}

.cta__headline {
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.03em;
  max-width: 20ch;
  margin-bottom: 1rem;
}

.cta__sub {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 50ch;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: var(--border);
  padding: 2rem 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
}

.footer__logo { text-decoration: none; }

.footer__logo-img {
  height: 22px;
  width: auto;
}

.footer__links {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.footer__link {
  font-size: 0.875rem;
  color: var(--black);
  text-decoration: none;
  transition: opacity 0.15s;
}
.footer__link:hover { opacity: 0.5; }

.footer__copy {
  font-size: 0.8125rem;
  color: var(--grey);
}

@media (max-width: 600px) {
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }
}

/* ============================================
   Blog list page
   ============================================ */
.blog-list {
  padding: var(--section-pad) 0;
}

.blog-list__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.blog-list__desc {
  font-size: 1.0625rem;
  color: var(--grey);
  max-width: 60ch;
  line-height: 1.6;
  margin-bottom: 3rem;
}

.blog-list__posts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  border-top: var(--border);
  border-left: var(--border);
}

.blog-list__empty {
  color: var(--grey);
  grid-column: 1 / -1;
  padding: 2.5rem 0;
  border-right: var(--border);
}

/* ============================================
   Blog single post
   ============================================ */
.blog-post {
  padding: var(--section-pad) 0;
}

.blog-post__header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: var(--border);
}

.blog-post__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--grey);
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.blog-post__title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.blog-post__desc {
  font-size: 1.125rem;
  color: var(--grey);
  line-height: 1.65;
  max-width: 60ch;
}

.blog-post__content {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.blog-post__content h2 {
  font-size: 1.5rem;
  margin: 2.5rem 0 0.875rem;
  letter-spacing: -0.02em;
}

.blog-post__content h3 {
  font-size: 1.1875rem;
  margin: 2rem 0 0.75rem;
}

.blog-post__content p {
  margin-bottom: 1.25rem;
}

.blog-post__content ul,
.blog-post__content ol {
  margin: 0 0 1.25rem 1.5rem;
}
.blog-post__content ul { list-style: disc; }
.blog-post__content ol { list-style: decimal; }

.blog-post__content li {
  margin-bottom: 0.5rem;
}

.blog-post__content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--light);
  padding: 0.15em 0.4em;
}

.blog-post__content pre {
  background: #0a0a0a;
  color: #f8f8f2;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.blog-post__content pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
}

.blog-post__content blockquote {
  border-left: 3px solid var(--black);
  padding-left: 1.25rem;
  color: var(--grey);
  font-style: italic;
  margin: 1.5rem 0;
}

.blog-post__content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.blog-post__content hr {
  border: none;
  border-top: var(--border);
  margin: 2.5rem 0;
}

.blog-post__footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: var(--border);
}