/* ==========================================================================
   Leandro De Paula — Independent Technology Consulting
   Minimalist, semantic, dependency-free stylesheet.
   ========================================================================== */

:root {
  --color-ink: #101828;
  --color-charcoal: #1d2939;
  --color-offwhite: #f7f7f4;
  --color-white: #ffffff;
  --color-gray: #667085;
  --color-gray-light: #d0d5dd;
  --color-accent: #6941c6;
  --color-accent-dark: #4a2e94;
  --color-teal: #0e9384;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max-width: 1180px;
  --content-measure: 68ch;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6.5rem;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);

  --transition-fast: 150ms ease;
  --transition-base: 240ms cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--color-offwhite);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

p {
  margin: 0;
}

ul, ol, dl {
  margin: 0;
  padding: 0;
  list-style: none;
}

dd {
  margin: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

/* --------------------------------------------------------------------------
   Accessibility helpers
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  z-index: 100;
  background: var(--color-ink);
  color: var(--color-white);
  padding: 0.75em 1.25em;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-2);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

main:focus {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */

.header-inner,
.hero-inner,
.credibility-list,
.section-intro,
.service-grid,
.problems-list,
.problems-closer,
.approach-steps,
.experience-body,
.contact-cta-inner,
.footer-inner {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-2);
}

@media (min-width: 640px) {
  .header-inner,
  .hero-inner,
  .credibility-list,
  .section-intro,
  .service-grid,
  .problems-list,
  .problems-closer,
  .approach-steps,
  .experience-body,
  .contact-cta-inner,
  .footer-inner {
    padding-inline: var(--space-4);
  }
}

.eyebrow {
  margin: 0 0 var(--space-1);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-intro {
  padding-top: var(--space-6);
  padding-bottom: var(--space-3);
}

.section-intro h2 {
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem);
  max-width: 32ch;
}

.section-lede {
  margin-top: var(--space-2);
  max-width: var(--content-measure);
  color: var(--color-gray);
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   Buttons & links
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 1.5em;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  min-height: 44px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-gray-light);
}

.btn-secondary:hover {
  border-color: var(--color-ink);
  background: rgba(16, 24, 40, 0.04);
}

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

.btn-compact {
  padding: 0.65em 1.15em;
  font-size: 0.85rem;
}

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

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 247, 244, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid rgba(16, 24, 40, 0.08);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: 0.85rem;
}

.wordmark {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  order: 3;
  width: 100%;
  padding-top: 0.25rem;
}

.site-nav a {
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-charcoal);
  padding: 0.6em 0.1em;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-nav a:hover {
  color: var(--color-accent);
  border-color: currentColor;
}

.header-cta {
  order: 2;
  white-space: nowrap;
}

@media (min-width: 780px) {
  .header-inner {
    flex-wrap: nowrap;
  }

  .site-nav {
    order: 2;
    width: auto;
    padding-top: 0;
  }

  .header-cta {
    order: 3;
  }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  position: relative;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-inline: auto;
}

.hero-copy h1 {
  font-size: clamp(2rem, 1.55rem + 2vw, 3.1rem);
  max-width: 18ch;
}

.hero-lede {
  margin-top: var(--space-3);
  max-width: var(--content-measure);
  font-size: 1.1rem;
  color: var(--color-charcoal);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.hero-availability {
  margin-top: var(--space-3);
  font-size: 0.9rem;
  color: var(--color-gray);
  max-width: 42ch;
}

/* --------------------------------------------------------------------------
   Credibility strip
   -------------------------------------------------------------------------- */

.credibility {
  border-top: 1px solid rgba(16, 24, 40, 0.08);
  border-bottom: 1px solid rgba(16, 24, 40, 0.08);
  background: var(--color-white);
}

.credibility-list {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

@media (min-width: 780px) {
  .credibility-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.credibility-item dt {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
}

.credibility-item dd {
  margin-top: 0.35em;
  color: var(--color-gray);
  font-size: 0.95rem;
  max-width: 34ch;
}

/* --------------------------------------------------------------------------
   Services
   -------------------------------------------------------------------------- */

.service-grid {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
}

@media (min-width: 780px) {
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background: var(--color-white);
  border: 1px solid rgba(16, 24, 40, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-number {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

.service-card h3 {
  font-size: 1.25rem;
}

.service-problem {
  font-weight: 600;
  color: var(--color-charcoal);
}

.service-description {
  color: var(--color-gray);
  font-size: 0.95rem;
}

.service-capabilities {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  margin-top: 0.25em;
}

.service-capabilities li {
  font-size: 0.9rem;
  padding-left: 1.2em;
  position: relative;
  color: var(--color-charcoal);
}

.service-capabilities li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
}

.service-best-for {
  font-size: 0.9rem;
  color: var(--color-gray);
  margin-top: 0.25em;
}

.service-best-for strong {
  color: var(--color-ink);
}

.service-link {
  margin-top: auto;
  padding-top: var(--space-2);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
  transition: border-color var(--transition-fast), gap var(--transition-fast);
}

.service-link:hover {
  border-color: currentColor;
}

/* --------------------------------------------------------------------------
   Problems
   -------------------------------------------------------------------------- */

.problems {
  background: var(--color-ink);
  color: var(--color-offwhite);
}

.problems .eyebrow {
  color: var(--color-teal);
}

.problems .section-intro h2 {
  color: var(--color-white);
}

.problems-list {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
}

@media (min-width: 780px) {
  .problems-list {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
}

.problems-list li {
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-left: 2px solid var(--color-accent);
  font-size: 1rem;
  color: rgba(247, 247, 244, 0.88);
  max-width: 46ch;
}

.problems-closer {
  padding-top: var(--space-2);
  padding-bottom: var(--space-6);
  font-size: 1.1rem;
  font-weight: 600;
  max-width: 50ch;
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Approach
   -------------------------------------------------------------------------- */

.approach-steps {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  counter-reset: step;
}

@media (min-width: 780px) {
  .approach-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.approach-step {
  border-top: 2px solid var(--color-accent);
  padding-top: var(--space-2);
}

.approach-step-number {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gray);
  margin-bottom: 0.5em;
}

.approach-step h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4em;
}

.approach-step p {
  color: var(--color-gray);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Experience
   -------------------------------------------------------------------------- */

.experience {
  background: var(--color-white);
  border-top: 1px solid rgba(16, 24, 40, 0.08);
}

.experience-body {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
}

@media (min-width: 900px) {
  .experience-body {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: var(--space-6);
  }
}

.experience-narrative p {
  max-width: var(--content-measure);
  color: var(--color-charcoal);
  font-size: 1.02rem;
}

.experience-narrative p + p {
  margin-top: var(--space-2);
}

.experience-narrative .experience-proof {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid var(--color-teal);
  background: var(--color-offwhite);
  font-weight: 600;
  color: var(--color-ink);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.experience-capabilities {
  display: grid;
  gap: 0.6em;
  align-content: start;
}

.experience-capabilities li {
  font-size: 0.92rem;
  padding: 0.6em 0.9em;
  background: var(--color-offwhite);
  border-radius: var(--radius-sm);
  color: var(--color-charcoal);
}

/* --------------------------------------------------------------------------
   Contact CTA
   -------------------------------------------------------------------------- */

.contact-cta {
  background: linear-gradient(155deg, var(--color-ink) 0%, var(--color-charcoal) 100%);
  color: var(--color-white);
}

.contact-cta-inner {
  padding-block: var(--space-7);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-cta h2 {
  color: var(--color-white);
  font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  max-width: 22ch;
}

.contact-cta p {
  margin-top: var(--space-3);
  max-width: var(--content-measure);
  color: rgba(247, 247, 244, 0.85);
  font-size: 1.05rem;
}

.contact-cta .contact-alt {
  margin-top: var(--space-3);
  font-size: 0.95rem;
  color: rgba(247, 247, 244, 0.85);
}

.contact-alt a {
  color: var(--color-white);
  font-weight: 600;
  border-bottom: 1px solid rgba(247, 247, 244, 0.5);
}

.contact-alt a:hover {
  border-color: var(--color-white);
}

.contact-cta .booking-card {
  width: 100%;
  max-width: 640px;
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  color: var(--color-ink);
  text-align: left;
}

.contact-cta .booking-card .booking-heading {
  color: var(--color-ink);
  font-size: 1.2rem;
}

.contact-cta .booking-card .booking-description {
  margin-top: 0.4em;
  color: var(--color-gray);
  font-size: 0.95rem;
  max-width: none;
}

.tymeslot-embed {
  margin-top: var(--space-3);
  width: 100%;
  min-height: 480px;
}

.contact-cta .booking-card .booking-fallback {
  margin-top: var(--space-3);
  color: var(--color-gray);
  font-size: 0.85rem;
  max-width: none;
}

.contact-cta .booking-card .booking-fallback a {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.contact-cta .booking-card .booking-fallback a:hover {
  border-color: currentColor;
}

@media (min-width: 640px) {
  .contact-cta .booking-card {
    padding: var(--space-5);
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--color-offwhite);
  border-top: 1px solid rgba(16, 24, 40, 0.08);
}

.footer-inner {
  padding-block: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.footer-copyright {
  font-size: 0.88rem;
  color: var(--color-gray);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9rem;
}

.footer-links li {
  display: flex;
  align-items: center;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  line-height: 1;
  color: var(--color-charcoal);
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.footer-email-link {
  padding-inline: 0.1em;
  border-bottom: 1px solid transparent;
}

.footer-email-link:hover {
  color: var(--color-accent);
  border-color: currentColor;
}

.icon-link {
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
}

.icon-link:hover {
  color: var(--color-accent);
  background: rgba(105, 65, 198, 0.08);
}