/* ========================================================
   Laura Fusetti — Portfolio | Minimal B&W Design System
   ======================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&display=swap');

/* --- Design Tokens --- */
:root {
  --black: #000;
  --white: #fff;
  --gray-100: #f7f7f7;
  --gray-200: #e8e8e8;
  --gray-400: #999;
  --gray-600: #666;
  --gray-800: #222;

  --font-body: 'Inter', sans-serif;
  --font-heading: 'Playfair Display', serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;

  --section-padding: clamp(4rem, 10vh, 8rem) clamp(1.5rem, 5vw, 6rem);

  --transition-base: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--black);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

/* --- Typography --- */
h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(3rem, 7vw, 6rem);
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.5rem);
}

p {
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  color: var(--gray-600);
  max-width: 600px;
}

.label {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.section-number {
  font-family: var(--font-heading);
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  font-weight: 400;
  font-style: italic;
  color: var(--gray-400);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  mix-blend-mode: difference;
  transition: var(--transition-base);
}

.nav__name {
  display: flex;
  align-items: center;
}

.nav__logo {
  height: 44px;
  width: auto;
  transition: opacity 0.3s;
}

.nav__name:hover .nav__logo {
  opacity: 0.7;
}

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  position: relative;
  transition: opacity 0.3s;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--white);
  transition: width 0.3s ease;
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__links a:hover {
  opacity: 0.7;
}

/* Hamburger (mobile) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.nav__hamburger span {
  width: 24px;
  height: 1.5px;
  background: var(--white);
  transition: var(--transition-base);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--white);
  transition: opacity 0.3s;
}

.mobile-menu a:hover {
  opacity: 0.6;
}

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

  .nav__hamburger {
    display: flex;
  }
}

/* --- Sections (shared) --- */
section {
  padding: var(--section-padding);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

/* --- HERO (01) --- */
.hero {
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 0;
  padding-bottom: 0;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.hero__logo {
  max-width: clamp(280px, 45vw, 520px);
  width: 100%;
  height: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero__tagline {
  font-size: clamp(0.85rem, 1.2vw, 1.05rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  text-transform: uppercase;
}

.hero__accent {
  color: var(--white);
  font-style: italic;
}

.hero__scroll {
  position: absolute;
  bottom: 6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: float 2.5s ease-in-out infinite;
}

.hero__scroll span {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gray-400), transparent);
}

@keyframes float {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(8px);
  }
}

@media (max-width: 768px) {
  .hero__scroll {
    bottom: 5rem;
  }
}

/* --- ABOUT (02) --- */
.about {
  background: var(--white);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about__heading {
  position: sticky;
  top: 20vh;
}

.about__heading h2 em {
  font-style: italic;
  font-weight: 400;
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about__text {
  font-size: clamp(0.9rem, 1.1vw, 1rem);
  line-height: 1.9;
  color: var(--gray-600);
}

.tech-stack-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.tech-stack-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.tech-stack-group__label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-style: italic;
  color: var(--gray-400);
  letter-spacing: 0.02em;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-sm);
}

.tech-stack__tag {
  padding: 0.4rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-800);
  transition: var(--transition-base);
}

.tech-stack__tag:hover {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about__heading {
    position: static;
  }
}

/* --- Image Frame (shared component) --- */
.img-frame {
  position: relative;
  border: 1px solid var(--gray-200);
  padding: 0.75rem;
  background: var(--white);
  transition: var(--transition-base);
  overflow: hidden;
}

.img-frame img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(100%);
  transition: filter var(--transition-slow), transform var(--transition-slow);
}

.img-frame:hover img {
  filter: grayscale(0%);
  transform: scale(1.01);
}

.img-frame:hover {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
}

/* Dark variant (for black background sections) */
.img-frame--dark {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
}

.img-frame--dark:hover {
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

/* --- BIG DATA (03) --- */
.bigdata {
  background: var(--gray-100);
}

.bigdata__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: stretch;
}

.bigdata__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.bigdata__left .img-frame {
  flex: 1;
  overflow: hidden;
}

.bigdata__left .img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.bigdata__right {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 380px;
  justify-self: center;
  justify-content: space-between;
}

.bigdata__right .card {
  flex: 1;
}

.bigdata__intro {
  max-width: 700px;
}

.bigdata__intro p {
  margin-top: var(--space-sm);
}

@media (max-width: 900px) {
  .bigdata__layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* Static frame — stays B&W, no hover color */
.img-frame--static img {
  filter: grayscale(100%);
}

.img-frame--static:hover img {
  filter: grayscale(100%);
  transform: none;
}

.card {
  background: var(--white);
  padding: var(--space-md);
  border: 1px solid var(--gray-200);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
}

.card h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.1rem;
}

.card p {
  font-size: 0.85rem;
  line-height: 1.8;
}

.card ul {
  list-style: none;
  margin-top: var(--space-sm);
}

.card ul li {
  font-size: 0.85rem;
  color: var(--gray-600);
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--gray-100);
  line-height: 1.6;
}

.card ul li:last-child {
  border-bottom: none;
}

@media (max-width: 900px) {
  .bigdata__cards {
    grid-template-columns: 1fr;
  }
}

/* --- AI CONTENT (04) --- */
.ai-content {
  background: var(--black);
  color: var(--white);
  text-align: center;
}

.ai-content__intro {
  max-width: 700px;
  margin: 0 auto var(--space-xl);
}

.ai-content__intro p {
  color: var(--gray-400);
  margin-top: var(--space-sm);
}

.ai-content__flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.flow-box {
  flex: 1;
  min-width: 250px;
  max-width: 480px;
  padding: var(--space-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  transition: var(--transition-base);
}

.flow-box .img-frame img {
  height: 350px;
  object-fit: contain;
  object-position: top;
}

.flow-box:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.03);
}

.flow-box h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.3rem;
}

.flow-box p {
  color: var(--gray-400);
  margin: 0 auto;
}

.flow-arrow {
  font-size: 2rem;
  color: var(--gray-400);
  flex-shrink: 0;
  align-self: center;
}

@media (max-width: 900px) {
  .ai-content__flow {
    flex-direction: column;
    align-items: center;
  }

  .flow-box {
    max-width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .flow-box .img-frame {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 350px;
  }

  .flow-box .img-frame img {
    height: 100%;
    object-fit: contain;
    object-position: center;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }
}

/* --- DRAPELAB (05) --- */
.drapelab {
  background: var(--white);
}

.drapelab__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr;
  gap: var(--space-xl);
}

.drapelab__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.drapelab__heading {
  margin-bottom: 0;
}

.drapelab__visual {
  position: relative;
}

.drapelab__visual .img-frame {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.drapelab__visual .img-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: top;
  display: block;
}

.drapelab__heading p {
  margin-top: var(--space-sm);
}

.approach-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.approach-list li {
  padding-left: var(--space-md);
  border-left: 2px solid var(--gray-200);
  transition: border-color var(--transition-base);
}

.approach-list li:hover {
  border-left-color: var(--black);
}

.approach-list li strong {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 0.3rem;
}

.approach-list li p {
  font-size: 0.85rem;
  line-height: 1.8;
}

.drapelab__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.drapelab__badge {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  border: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-lg);
  transition: var(--transition-slow);
}

.drapelab__badge:hover {
  border-color: var(--black);
}

.drapelab__badge h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: var(--space-sm);
}

.drapelab__badge p {
  font-size: 0.85rem;
  color: var(--gray-400);
}

@media (max-width: 900px) {
  .drapelab__layout {
    grid-template-columns: 1fr;
  }

  .drapelab__visual .img-frame {
    position: relative;
    top: auto;
    left: auto;
    height: auto;
  }
}

/* --- STORYTELLING (06) --- */
.storytelling {
  background: var(--gray-100);
}

.storytelling__layout {
  display: grid;
  grid-template-columns: 3fr 5fr;
  gap: var(--space-xl);
  align-items: start;
}

.storytelling__left {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.storytelling__right {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.storytelling__right .img-frame {
  max-width: 80%;
}

.storytelling__heading {
  max-width: 800px;
}

.storytelling__heading p {
  margin-top: var(--space-sm);
}

.pillar {
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--gray-200);
  border-bottom: none;
  transition: background var(--transition-base);
  position: relative;
}

.pillar:last-of-type {
  border-bottom: 1px solid var(--gray-200);
}

.pillar:hover {
  background: var(--white);
}

.pillar__number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--gray-200);
  margin-bottom: var(--space-sm);
  line-height: 1;
}

.pillar h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.pillar p {
  font-size: 0.82rem;
  line-height: 1.85;
}

.storytelling__footnote {
  margin-top: 0;
  padding-top: var(--space-md);
  border-top: 1px solid var(--gray-200);
  font-size: 0.82rem;
  color: var(--gray-600);
  max-width: 800px;
  font-style: italic;
}

@media (max-width: 900px) {
  .storytelling__layout {
    grid-template-columns: 1fr;
  }

  .storytelling__right {
    order: -1;
  }
}

/* --- CONTACT (07) --- */
.contact {
  background: var(--black);
  color: var(--white);
  text-align: center;
}

.contact__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.contact h2 {
  font-size: clamp(2.5rem, 6vw, 5rem);
}

.contact__photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--gray-400);
  margin-bottom: calc(var(--space-lg) * -0.5);
}

.contact__links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.contact__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.3s;
}

.contact__link:hover {
  opacity: 0.6;
}

.contact__link .label {
  color: var(--gray-400);
}

.contact__link span:last-child {
  font-size: 0.9rem;
  font-weight: 400;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 2px;
}

.contact__cta {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1px solid var(--white);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white);
  background: transparent;
  cursor: pointer;
  transition: var(--transition-base);
  margin-top: var(--space-md);
}

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

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger children */
.stagger-children>* {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-children.visible>*:nth-child(1) {
  transition-delay: 0s;
}

.stagger-children.visible>*:nth-child(2) {
  transition-delay: 0.12s;
}

.stagger-children.visible>*:nth-child(3) {
  transition-delay: 0.24s;
}

.stagger-children.visible>*:nth-child(4) {
  transition-delay: 0.36s;
}

.stagger-children.visible>*:nth-child(5) {
  transition-delay: 0.48s;
}

.stagger-children.visible>* {
  opacity: 1;
  transform: translateY(0);
}

/* --- Footer --- */
.footer {
  padding: var(--space-md) clamp(1.5rem, 5vw, 4rem);
  background: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}

.footer p {
  font-size: 0.7rem;
  color: var(--gray-400);
  margin: 0 auto;
}

/* --- Custom Cursor Dot (desktop enhancement) --- */
@media (hover: hover) {
  .cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--black);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
    transition: transform 0.15s ease;
  }
}

/* --- Selection --- */
::selection {
  background: var(--black);
  color: var(--white);
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--white);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: 3px;
}