/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
  --color-bg:     #fff;
  --color-text:   #000;
  --color-border: #000;
  --border:       1px solid var(--color-border);

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                Helvetica, Arial, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  --nav-height: 4rem;
  --max-width:  1100px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}

body {
  font-family: var(--font-stack);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: var(--color-text);
  text-decoration: underline;
}

a:hover {
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--color-border);
  outline-offset: 2px;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.section__footer {
  margin-top: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.nav__logo {
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav__logo:hover,
.nav__logo:focus-visible {
  text-decoration: underline;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  margin-right: calc(-1 * var(--space-xs));
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
}

.nav__menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: var(--border);
  padding: var(--space-md);
  gap: var(--space-sm);
}

.nav__menu.nav--open {
  display: flex;
}

.nav__link {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
}

.nav__link:hover {
  text-decoration: underline;
}

.nav__link[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }

  .nav__menu {
    display: flex;
    flex-direction: row;
    position: static;
    border: none;
    padding: 0;
    gap: var(--space-md);
  }
}

/* ==========================================================================
   Homepage Hero
   ========================================================================== */

.hero {
  padding-block: var(--space-xl);
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-md);
}

.hero__headline {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
  max-width: 18ch;
}

.hero__tagline {
  font-size: clamp(1rem, 2vw, 1.125rem);
  max-width: 55ch;
  line-height: 1.75;
  margin-bottom: var(--space-md);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

/* ==========================================================================
   Page Hero (inner pages)
   ========================================================================== */

.page-hero {
  padding-block: var(--space-lg);
  border-bottom: var(--border);
}

.page-hero__headline {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  max-width: 22ch;
}

.page-hero__lead {
  font-size: clamp(0.9375rem, 2vw, 1.0625rem);
  max-width: 60ch;
  line-height: 1.75;
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  padding-block: var(--space-lg);
  border-top: var(--border);
}

.section__title {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.section__lead {
  font-size: 0.9375rem;
  max-width: 60ch;
  line-height: 1.75;
  margin-bottom: var(--space-lg);
}

/* ==========================================================================
   Prose & Lists
   ========================================================================== */

.bullet-list {
  list-style: disc;
  padding-left: var(--space-md);
  font-size: 0.9375rem;
  line-height: 1.9;
}

.bullet-list li + li {
  margin-top: 0.2rem;
}

.dash-list {
  list-style: none;
  padding-left: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
}

.dash-list li {
  padding-left: 1.5em;
  position: relative;
}

.dash-list li::before {
  content: '—';
  position: absolute;
  left: 0;
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  border: var(--border);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  background: none;
  font-family: var(--font-stack);
  letter-spacing: 0.02em;
  transition: transform 160ms ease-out, box-shadow 160ms ease-out,
              background-color 160ms ease-out, color 160ms ease-out;
}

.btn:hover,
.btn:focus-visible {
  outline: none;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 3px 3px 0 0 #000;
}

.btn--filled {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--filled:hover,
.btn--filled:focus-visible {
  background-color: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: 3px 3px 0 0 #000;
}

/* ==========================================================================
   Cards (products)
   ========================================================================== */

.card {
  border: var(--border);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.card__name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card__description {
  font-size: 0.9375rem;
  line-height: 1.65;
  flex-grow: 1;
}

.card__link {
  align-self: flex-start;
  margin-top: auto;
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border: var(--border);
  padding: var(--space-xs) var(--space-sm);
  letter-spacing: 0.02em;
}

.card__link:hover,
.card__link:focus-visible {
  background-color: var(--color-text);
  color: var(--color-bg);
  outline: none;
}

/* ==========================================================================
   Product detail sections
   ========================================================================== */

.product-section {
  padding-block: var(--space-lg);
  border-top: var(--border);
}

.product-section__header {
  margin-bottom: var(--space-lg);
}

.product-section__name {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}

.product-section__url {
  font-size: 0.875rem;
}

.product-section__description {
  font-size: 0.9375rem;
  line-height: 1.75;
  max-width: 60ch;
  margin-bottom: var(--space-md);
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
  .product-detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.product-detail-block {
  border: var(--border);
  padding: var(--space-md);
}

.product-detail-block__label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-sm);
}

/* ==========================================================================
   Service package cards
   ========================================================================== */

.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 900px) {
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  border: var(--border);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.service-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.service-card__description {
  font-size: 0.9375rem;
  line-height: 1.65;
}

.service-card__block-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xs);
}

.service-card__list {
  list-style: disc;
  padding-left: var(--space-sm);
  font-size: 0.875rem;
  line-height: 1.8;
}

.service-card__pricing {
  border-top: var(--border);
  padding-top: var(--space-md);
  margin-top: auto;
}

.service-card__pricing-value {
  font-size: 1rem;
  font-weight: 700;
}

/* ==========================================================================
   Who we help
   ========================================================================== */

.who-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

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

@media (min-width: 1024px) {
  .who-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.who-item {
  border-top: 3px solid var(--color-border);
  padding-top: var(--space-sm);
}

.who-item__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.who-item__description {
  font-size: 0.875rem;
  line-height: 1.65;
}

/* ==========================================================================
   Process steps
   ========================================================================== */

.steps {
  display: grid;
  grid-template-columns: 1fr;
}

.step {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-sm);
  padding-block: var(--space-md);
  border-top: var(--border);
}

.step:last-child {
  border-bottom: var(--border);
}

.step__number {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-top: 0.2em;
}

.step__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.step__description {
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ==========================================================================
   What makes us different
   ========================================================================== */

.diff-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .diff-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.diff-item {
  padding: var(--space-md);
  border: var(--border);
}

.diff-item__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.diff-item__description {
  font-size: 0.875rem;
  line-height: 1.65;
}

/* ==========================================================================
   Engagement model
   ========================================================================== */

.engagement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .engagement-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.engagement-item {
  border: var(--border);
  padding: var(--space-md);
}

.engagement-item__phase {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xs);
}

.engagement-item__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.engagement-item__description {
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-list {
  border-top: var(--border);
}

.faq-item {
  border-bottom: var(--border);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9375rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding-block: var(--space-md);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 300;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  content: '\2212';
}

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

.faq-answer {
  font-size: 0.9375rem;
  line-height: 1.75;
  padding-bottom: var(--space-md);
  max-width: 65ch;
}

/* ==========================================================================
   Not offered list
   ========================================================================== */

.not-offered-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xs);
}

@media (min-width: 768px) {
  .not-offered-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   CTA block
   ========================================================================== */

.cta-block {
  padding-block: var(--space-lg);
  border-top: var(--border);
}

.cta-block__headline {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  max-width: 22ch;
}

.cta-block__body {
  font-size: 0.9375rem;
  line-height: 1.75;
  max-width: 55ch;
  margin-bottom: var(--space-md);
}

.cta-block__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

/* ==========================================================================
   Contact options
   ========================================================================== */

.contact-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .contact-options {
    grid-template-columns: repeat(2, 1fr);
  }
}

.contact-option {
  border: var(--border);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-option__label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.contact-option__title {
  font-size: 1.25rem;
  font-weight: 700;
}

.contact-option__description {
  font-size: 0.9375rem;
  line-height: 1.65;
  flex-grow: 1;
}

/* ==========================================================================
   About / Founder
   ========================================================================== */

.founder-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .founder-section {
    grid-template-columns: 200px 1fr;
  }
}

.founder-image-placeholder {
  width: 200px;
  height: 200px;
  border: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  padding: var(--space-sm);
}

.founder-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.founder-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.founder-title {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.founder-bio p {
  font-size: 0.9375rem;
  line-height: 1.75;
  max-width: 65ch;
}

.founder-bio p + p {
  margin-top: var(--space-sm);
}

.team-placeholder {
  border: 1px dashed var(--color-border);
  padding: var(--space-lg);
  text-align: center;
  font-size: 0.875rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: var(--border);
  padding-block: var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer__label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xs);
}

.footer__link {
  font-size: 0.875rem;
  display: block;
}

.footer__copy {
  font-size: 0.75rem;
  border-top: var(--border);
  padding-top: var(--space-md);
}

/* ==========================================================================
   Hero entrance animation
   ========================================================================== */

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__eyebrow,
.hero__headline,
.hero__tagline,
.hero__actions,
.page-hero__headline,
.page-hero__lead {
  animation: fade-up 600ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Homepage hero stagger */
.hero__eyebrow  { animation-delay:   0ms; }
.hero__headline { animation-delay:  80ms; }
.hero__tagline  { animation-delay: 160ms; }
.hero__actions  { animation-delay: 240ms; }

/* Inner page hero stagger */
.page-hero__headline { animation-delay:  0ms; }
.page-hero__lead     { animation-delay: 80ms; }

/* ==========================================================================
   Motion accessibility
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .hero__eyebrow,
  .hero__headline,
  .hero__tagline,
  .hero__actions,
  .page-hero__headline,
  .page-hero__lead {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .btn {
    transition: none;
  }
}