/* ============================================
   LUCA.DEV — Style Sheet
   Modern, Minimal, Startup-like
   ============================================ */

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

:root {
  --color-bg: #09090b;
  --color-bg-elevated: #131316;
  --color-bg-card: #18181b;
  --color-bg-card-hover: #1e1e22;
  --color-border: #27272a;
  --color-border-light: #3f3f46;
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-primary-glow: rgba(99, 102, 241, 0.15);
  --color-accent: #22d3ee;
  --color-gradient-start: #6366f1;
  --color-gradient-end: #22d3ee;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-card-hover: 0 10px 40px rgba(0,0,0,0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* --- CONTAINER --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- SECTION --- */
.section {
  padding: 120px 0;
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: 56px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 30px var(--color-primary-glow);
  transform: translateY(-1px);
}

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

.btn--outline:hover {
  border-color: var(--color-text-secondary);
  background: var(--color-bg-elevated);
}

.btn--lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn--full {
  width: 100%;
}

.btn--nav {
  background: var(--color-primary);
  color: #fff;
  padding: 8px 20px;
  font-size: 0.875rem;
}

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

/* --- LANG SWITCH --- */
.nav__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  display: flex;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  overflow: hidden;
}

.lang-switch--mobile {
  width: fit-content;
  margin-bottom: 16px;
}

.lang-switch__btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-switch__btn:hover {
  color: var(--color-text-secondary);
}

.lang-switch__btn.active {
  background: var(--color-primary);
  color: #fff;
}

.lang-flag {
  font-size: 0.85rem;
  line-height: 1;
  margin-right: 2px;
}

/* --- NAV --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav--scrolled {
  border-bottom-color: var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.nav__links a:hover {
  color: var(--color-text);
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav__mobile {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: 24px;
}

.nav__mobile.active {
  display: block;
}

.nav__mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nav__mobile a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* --- HERO --- */
.hero {
  padding-top: 160px;
  padding-bottom: 100px;
  text-align: center;
}

.hero__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.25);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero__title {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 900px;
  margin: 0 auto 24px;
}

.hero__sub {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.8;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
  max-width: 600px;
  margin: 0 auto;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__number {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat__label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* --- ABOUT --- */
.about__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: start;
}

.about__content h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.about__content p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about__content p strong {
  color: var(--color-text);
}

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

.about__values {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.value-chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: var(--color-bg-elevated);
}

.about__visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

.about__card:hover {
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
}

.about__card-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.about__card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.about__card p strong {
  color: var(--color-text);
}

/* --- WHY ME --- */
.whyme {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.whyme__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.whyme-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--color-border);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  overflow: hidden;
}

.whyme-card::before {
  content: '';
  position: absolute;
  top: var(--mouse-y, 50%);
  left: var(--mouse-x, 50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.45), transparent 70%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.whyme-card:hover::before {
  opacity: 1;
}

.whyme-card__inner {
  position: relative;
  z-index: 1;
  background: var(--color-bg-card);
  border-radius: calc(var(--radius-lg) - 1px);
  padding: 40px;
  height: 100%;
  transition: background var(--transition);
}

.whyme-card:hover .whyme-card__inner {
  background: var(--color-bg-card-hover);
}

.whyme-card:hover {
  box-shadow: 0 0 40px rgba(34, 211, 238, 0.12);
  transform: translateY(-4px);
}

.whyme-card__icon {
  color: var(--color-accent);
  margin-bottom: 20px;
}

.whyme-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.whyme-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- SERVICES --- */
.services {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--color-border);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: var(--mouse-y, 50%);
  left: var(--mouse-x, 50%);
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.5), transparent 70%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.service-card:hover::before {
  opacity: 1;
}

.service-card__inner {
  position: relative;
  z-index: 1;
  background: var(--color-bg-card);
  border-radius: calc(var(--radius-lg) - 1px);
  padding: 40px;
  height: 100%;
  transition: background var(--transition);
}

.service-card:hover .service-card__inner {
  background: var(--color-bg-card-hover);
}

.service-card:hover {
  box-shadow: 0 0 40px var(--color-primary-glow);
  transform: translateY(-4px);
}

.service-card__number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.service-card__icon {
  color: var(--color-primary);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- PROCESS --- */
.process__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  list-style: none;
  padding: 0;
}

.process-step {
  text-align: center;
  padding: 40px 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
}

.process-step:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 40px var(--color-primary-glow);
}

.process-step__number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- CONTACT --- */
.contact {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
}

.contact__wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact__content h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.contact__content > p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  line-height: 1.8;
}

.contact__methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.contact__method {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.contact__method:hover {
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
}

.contact__method-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__method strong {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 2px;
}

.contact__method span {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.contact__note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* --- FORM --- */
.contact__form-wrapper {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--color-bg-card);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* --- FOOTER --- */
.footer {
  padding: 64px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand {
  max-width: 320px;
}

.footer__brand p {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer__links {
  display: flex;
  gap: 64px;
}

.footer__col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.footer__col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer__col a:hover {
  color: var(--color-text);
}

.footer__bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- FAQ --- */
.faq {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.faq__list {
  max-width: 760px;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

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

.faq__item summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq__item[open] summary::after {
  content: '−';
  color: var(--color-primary);
}

.faq__item summary:hover {
  color: var(--color-primary);
}

.faq__answer {
  padding: 0 0 24px;
}

.faq__answer p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* --- FLOATING CTA --- */
.floating-cta {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.35);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease, background var(--transition), box-shadow var(--transition);
}

.floating-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.floating-cta:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 8px 40px rgba(99, 102, 241, 0.5);
  transform: translateY(-2px);
}

.floating-cta svg {
  flex-shrink: 0;
}

/* --- SKIP LINK (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 12px 24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
}

.skip-link:focus {
  top: 16px;
}

/* --- ANIMATIONS --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .whyme__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {

  .whyme__grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 80px 0;
  }

  .nav__links,
  .nav__right {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  .hero {
    padding-top: 120px;
    padding-bottom: 64px;
  }

  .hero__stats {
    gap: 32px;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .process__grid {
    grid-template-columns: 1fr;
  }

  .contact__wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer__inner {
    flex-direction: column;
  }

  .footer__links {
    gap: 40px;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero__stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .service-card__inner {
    padding: 28px;
  }

  .contact__form-wrapper {
    padding: 24px;
  }

  .floating-cta span {
    display: none;
  }

  .floating-cta {
    padding: 16px;
  }
}