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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

/* ─────────────────────────────────────
   DESIGN TOKENS
───────────────────────────────────── */
:root {
  --black:      #0a0a0a;
  --white:      #ffffff;
  --gray-50:    #fafafa;
  --gray-100:   #f4f4f4;
  --gray-200:   #e8e8e8;
  --gray-300:   #d0d0d0;
  --gray-400:   #a8a8a8;
  --gray-600:   #666666;
  --accent:     #e8c74c;
  --accent-dark:#c9a830;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;

  --max-width:  1140px;
  --padding-x:  clamp(1.5rem, 5vw, 4rem);

  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s var(--ease);
}

/* ─────────────────────────────────────
   LAYOUT
───────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-x);
}

/* ─────────────────────────────────────
   TYPOGRAPHY
───────────────────────────────────── */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1.25rem;
}

.section-header {
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
}

/* ─────────────────────────────────────
   BUTTONS
───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: var(--transition);
  cursor: pointer;
}

.btn--outline {
  border: 1px solid var(--gray-300);
  color: var(--black);
  background: transparent;
}

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

.btn--accent {
  background: var(--accent);
  color: var(--black);
  border: 1px solid var(--accent);
}

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

.btn--large {
  padding: 1.125rem 2.25rem;
  font-size: 1rem;
}

/* ─────────────────────────────────────
   SCROLL ANIMATIONS
───────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Stagger for siblings */
.fade-in:nth-child(2) { transition-delay: 0.08s; }
.fade-in:nth-child(3) { transition-delay: 0.16s; }
.fade-in:nth-child(4) { transition-delay: 0.24s; }
.fade-in:nth-child(5) { transition-delay: 0.32s; }

/* Project cards stagger */
.projects__grid .project-card:nth-child(1) { transition-delay: 0s; }
.projects__grid .project-card:nth-child(2) { transition-delay: 0.1s; }
.projects__grid .project-card:nth-child(3) { transition-delay: 0.2s; }
.projects__grid .project-card:nth-child(4) { transition-delay: 0.3s; }

/* Tools stagger */
.tools__grid .tool-item:nth-child(1) { transition-delay: 0s; }
.tools__grid .tool-item:nth-child(2) { transition-delay: 0.05s; }
.tools__grid .tool-item:nth-child(3) { transition-delay: 0.1s; }
.tools__grid .tool-item:nth-child(4) { transition-delay: 0.15s; }
.tools__grid .tool-item:nth-child(5) { transition-delay: 0.2s; }
.tools__grid .tool-item:nth-child(6) { transition-delay: 0.25s; }
.tools__grid .tool-item:nth-child(7) { transition-delay: 0.3s; }
.tools__grid .tool-item:nth-child(8) { transition-delay: 0.35s; }

/* ─────────────────────────────────────
   NAVIGATION
───────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem var(--padding-x);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-bottom var(--transition), box-shadow var(--transition);
}

.nav.is-scrolled {
  border-bottom: 1px solid var(--gray-200);
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  letter-spacing: 0.06em;
  color: var(--black);
}

.nav__cta {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--black);
  color: var(--black);
  transition: var(--transition);
}

.nav__cta:hover {
  background: var(--black);
  color: var(--white);
}

/* ─────────────────────────────────────
   HERO
───────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 9rem var(--padding-x) 6rem;
  position: relative;
}

.hero .container {
  padding: 0;
}

.hero__label {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(5.5rem, 13vw, 10rem);
  line-height: 0.88;
  letter-spacing: -0.03em;
  margin-bottom: 2.75rem;
  color: var(--black);
}

.hero__desc {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  font-weight: 300;
  color: var(--gray-600);
  max-width: 500px;
  line-height: 1.75;
  margin-bottom: 2.75rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: var(--padding-x);
}

.hero__scroll-indicator span {
  display: block;
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, transparent, var(--gray-300));
  animation: scrollLine 2.2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { opacity: 0; transform: translateY(-8px); }
  50%  { opacity: 1; }
  100% { opacity: 0; transform: translateY(8px); }
}

/* ─────────────────────────────────────
   ABOUT
───────────────────────────────────── */
.about {
  padding: 8rem 0;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}

.about__content .section-label {
  margin-bottom: 1.5rem;
}

.about__content h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 2rem;
  line-height: 1.15;
}

.about__content p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: 1rem;
}

.about__content p:last-child { margin-bottom: 0; }

.about__content strong {
  color: var(--black);
  font-weight: 500;
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--gray-200);
}

.stat {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.stat:nth-child(2) { border-right: none; }

.stat--full {
  grid-column: 1 / -1;
  border-right: none;
  border-bottom: none;
}

.stat__value {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--black);
}

.stat__label {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* ─────────────────────────────────────
   PROJECTS
───────────────────────────────────── */
.projects {
  padding: 8rem 0;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
}

.project-card {
  background: var(--white);
  padding: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  cursor: pointer;
  position: relative;
  transition: background var(--transition);
  overflow: hidden;
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--accent);
  transition: width 0.45s var(--ease);
}

.project-card:hover {
  background: var(--gray-50);
}

.project-card:hover::after {
  width: 100%;
}

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

.project-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.project-card__icon {
  font-size: 1.75rem;
  line-height: 1;
}

.project-card__number {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--gray-300);
}

.project-card__body {
  flex: 1;
}

.project-card__tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.project-card__body h3 {
  font-size: 1.45rem;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.project-card__body p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.project-card__footer {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.project-card__cta {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--black);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition);
}

.project-card:hover .project-card__cta {
  gap: 1rem;
}

.project-card:hover .project-card__cta span {
  color: var(--accent);
}

/* ─────────────────────────────────────
   TOOLS
───────────────────────────────────── */
.tools {
  padding: 8rem 0;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.tools__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
}

.tool-item {
  background: var(--white);
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition: background var(--transition);
}

.tool-item:hover {
  background: var(--gray-50);
}

.tool-item__name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--black);
  line-height: 1.2;
}

.tool-item__type {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* ─────────────────────────────────────
   TESTIMONIAL
───────────────────────────────────── */
.testimonial {
  padding: 10rem 0;
}

.testimonial__inner {
  max-width: 780px;
}

.testimonial__quote-mark {
  display: block;
  font-family: var(--font-serif);
  font-size: 7rem;
  line-height: 0.6;
  color: var(--accent);
  margin-bottom: 1.25rem;
  user-select: none;
}

.testimonial__text {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  color: var(--black);
  letter-spacing: -0.01em;
  quotes: none;
  margin-bottom: 2.5rem;
}

.testimonial__author {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.testimonial__author strong {
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-sans);
  font-style: normal;
}

.testimonial__author span {
  font-size: 0.78rem;
  color: var(--gray-400);
  letter-spacing: 0.04em;
}

/* ─────────────────────────────────────
   CONTACT
───────────────────────────────────── */
.contact {
  padding: 9rem 0;
  background: var(--black);
  color: var(--white);
}

.contact__inner .section-label {
  color: rgba(255, 255, 255, 0.3);
}

.contact__inner h2 {
  font-size: clamp(2.75rem, 6vw, 5rem);
  color: var(--white);
  margin-bottom: 1.5rem;
  line-height: 1;
}

.contact__inner p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 2.75rem;
  line-height: 1.75;
  max-width: 420px;
}

.contact__linkedin {
  display: inline-block;
  margin-top: 2rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transition: color var(--transition), border-color var(--transition);
}

.contact__linkedin:hover {
  color: rgba(255, 255, 255, 0.7);
  border-color: rgba(255, 255, 255, 0.3);
}

/* ─────────────────────────────────────
   FOOTER
───────────────────────────────────── */
.footer {
  padding: 1.75rem 0;
  background: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copy {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.2);
  letter-spacing: 0.05em;
}

.footer__nav a {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.2);
  letter-spacing: 0.05em;
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: rgba(255, 255, 255, 0.55);
}

/* ─────────────────────────────────────
   MODAL
───────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.modal[hidden] {
  display: none;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 10, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fadeIn 0.25s ease forwards;
  cursor: pointer;
}

.modal__panel {
  position: relative;
  background: var(--white);
  width: min(720px, 100%);
  max-height: min(90vh, 860px);
  overflow-y: auto;
  animation: slideUp 0.35s var(--ease) forwards;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-200) transparent;
}

.modal__panel::-webkit-scrollbar { width: 4px; }
.modal__panel::-webkit-scrollbar-track { background: transparent; }
.modal__panel::-webkit-scrollbar-thumb { background: var(--gray-200); }

.modal__close {
  position: sticky;
  top: 1.25rem;
  float: right;
  margin: 1.25rem 1.25rem -2.5rem 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--gray-100);
  color: var(--black);
  border-radius: 50%;
  transition: background var(--transition);
  z-index: 1;
}

.modal__close:hover {
  background: var(--gray-200);
}

.modal__body {
  padding: 2.5rem 3rem 3.5rem;
  clear: both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Modal Content ── */
.modal-project__header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--gray-200);
}

.modal-project__icon {
  font-size: 2.25rem;
  margin-bottom: 1.25rem;
  display: block;
  line-height: 1;
}

.modal-project__title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  margin-bottom: 0.875rem;
  line-height: 1.15;
}

.modal-project__desc {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

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

.modal-project__badge {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
}

.modal-project__gains {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
  margin: 2rem 0 2.5rem;
}

.gain-item {
  background: var(--white);
  padding: 1.5rem;
}

.gain-item__value {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.85rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.gain-item__label {
  font-size: 0.75rem;
  color: var(--gray-600);
  line-height: 1.45;
}

.modal-project__section {
  margin-bottom: 2rem;
}

.modal-project__section:last-child {
  margin-bottom: 0;
}

.modal-project__section-label {
  display: block;
  font-size: 0.63rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.modal-project__section p {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.8;
}

.modal-project__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.modal-project__tool {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  padding: 0.3rem 0.875rem;
  background: var(--gray-100);
  color: var(--black);
}

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

@media (max-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

  .modal__body {
    padding: 1.5rem 1.75rem 2.5rem;
  }

  .hero {
    padding-top: 8rem;
    padding-bottom: 5rem;
  }
}

@media (max-width: 480px) {
  .about__stats {
    grid-template-columns: 1fr;
  }

  .stat {
    border-right: none;
    border-bottom: 1px solid var(--gray-200);
  }

  .stat--full {
    border-bottom: none;
  }

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

  .hero__actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}