/* ============================================
   Andy Liszewski - Product Design Portfolio
   ============================================ */

/* --- Design Tokens --- */
:root {
  --color-dark: #0a0a0a;
  --color-dark-surface: #141414;
  --color-dark-border: #252525;
  --color-light: #fafafa;
  --color-white: #ffffff;
  --color-accent: #4dd9e8;
  --color-accent-hover: #3bc4d4;
  --color-accent-dim: rgba(77, 217, 232, 0.12);
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-text-muted: #888;
  --color-text-on-dark: #e0e0e0;
  --color-border: #e8e8e8;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --container-max: 1100px;
  --container-padding: 2.5rem;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s ease;
}

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

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

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

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

/* --- Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 7rem 0;
}

.section__title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.section__intro {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin-bottom: 3.5rem;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--hero {
  background: transparent;
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.nav--hero .nav__logo { color: var(--color-white); }
.nav--scrolled .nav__logo { color: var(--color-text); }

.nav__menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
  align-items: center;
}

.nav__link {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  opacity: 0.8;
}

.nav__link:hover { opacity: 1; }

.nav--hero .nav__link { color: var(--color-white); }
.nav--scrolled .nav__link { color: var(--color-text); }

.nav__link--cta {
  padding: 0.5rem 1.25rem;
  border: 1.5px solid;
  border-radius: 4px;
  opacity: 1;
}

.nav--hero .nav__link--cta {
  border-color: rgba(255, 255, 255, 0.4);
}
.nav--hero .nav__link--cta:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav--scrolled .nav__link--cta {
  border-color: var(--color-text);
}
.nav--scrolled .nav__link--cta:hover {
  background: var(--color-text);
  color: var(--color-white);
}

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

.nav__toggle span {
  width: 24px;
  height: 2px;
  transition: all var(--transition-fast);
}

.nav--hero .nav__toggle span { background: var(--color-white); }
.nav--scrolled .nav__toggle span { background: var(--color-text); }

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease-out;
}

body.loaded .hero__bg {
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 10, 0.55) 0%,
    rgba(10, 10, 10, 0.40) 50%,
    rgba(10, 10, 10, 0.65) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 0 2rem;
}

.hero__label {
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.3s ease forwards;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.5s ease forwards;
}

.hero__tagline {
  font-size: 1.1rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 2.5rem;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.7s ease forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.9rem 2.25rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0;
  animation: fadeUp 0.8s 0.9s ease forwards;
}

.btn--primary {
  background: linear-gradient(
    135deg,
    rgba(77, 217, 232, 0.6) 0%,
    rgba(77, 217, 232, 0.35) 50%,
    rgba(120, 230, 240, 0.5) 100%
  );
  color: var(--color-white);
  border: 1px solid rgba(77, 217, 232, 0.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow:
    0 1px 1px rgba(255, 255, 255, 0.15) inset,
    0 4px 20px rgba(77, 217, 232, 0.15),
    0 1px 3px rgba(0, 0, 0, 0.1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn--primary:hover {
  background: linear-gradient(
    135deg,
    rgba(77, 217, 232, 0.75) 0%,
    rgba(77, 217, 232, 0.5) 50%,
    rgba(140, 240, 250, 0.65) 100%
  );
  border-color: rgba(77, 217, 232, 0.6);
  transform: translateY(-2px);
  box-shadow:
    0 1px 1px rgba(255, 255, 255, 0.2) inset,
    0 8px 30px rgba(77, 217, 232, 0.3),
    0 2px 6px rgba(0, 0, 0, 0.1);
}

.btn--full {
  width: 100%;
  text-align: center;
  animation: none;
  opacity: 1;
}

/* --- Credentials Bar --- */
.credentials {
  background: var(--color-dark);
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--color-dark-border);
}

.credentials__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.credentials__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.credentials__degree {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.credentials__detail {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 300;
}

.credentials__divider {
  width: 1px;
  height: 24px;
  background: var(--color-dark-border);
}

/* --- Services --- */
.services {
  background: var(--color-light);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--color-white);
  padding: 2.25rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  border-color: var(--color-accent);
}

.service-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.service-card__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* --- AI Section --- */
.ai-section {
  background: var(--color-dark);
  padding: 5rem 0;
}

.ai-section__content {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.ai-section__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1.5rem;
  color: var(--color-accent);
}

.ai-section__icon svg {
  width: 100%;
  height: 100%;
}

.ai-section__title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.ai-section__text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-muted);
}

/* --- About --- */
.about {
  background: var(--color-white);
}

.about__content {
  max-width: 720px;
}

.about__content p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
  margin-bottom: 1.75rem;
}

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

/* --- Portfolio --- */
.portfolio {
  background: var(--color-light);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.portfolio__item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: var(--color-dark);
  cursor: pointer;
  aspect-ratio: 16 / 11;
}

.portfolio__item--wide {
  grid-column: span 2;
}

.portfolio__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow), opacity var(--transition-base);
}

.portfolio__item:hover img {
  transform: scale(1.05);
  opacity: 0.6;
}

.portfolio__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.75rem;
  background: linear-gradient(transparent 40%, rgba(10, 10, 10, 0.85));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio__item:hover .portfolio__overlay {
  opacity: 1;
}

.portfolio__overlay h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.35rem;
}

.portfolio__overlay p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* Portfolio video */
.portfolio__item--video {
  aspect-ratio: 16 / 9;
}

.portfolio__item--video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}

.portfolio__overlay--video {
  pointer-events: none;
  background: linear-gradient(transparent 60%, rgba(10, 10, 10, 0.8));
}

/* --- Clients / Testimonials --- */
.clients {
  background: var(--color-white);
}

.clients__grid {
  display: grid;
  gap: 3rem;
  max-width: 720px;
}

.testimonial {
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
}

.testimonial:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.testimonial__text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
}

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

.testimonial__author strong {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.testimonial__author span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- Contact --- */
.contact {
  background: var(--color-light);
}

.contact__content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  max-width: 800px;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-top: 0.5rem;
}

.contact__detail h3 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.contact__detail a,
.contact__detail p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.contact__detail a:hover {
  color: var(--color-accent);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

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

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  padding: 2rem 0;
}

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

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* --- Responsive --- */
@media (max-width: 900px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .portfolio__item--wide {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1.5rem;
  }

  .section {
    padding: 5rem 0;
  }

  /* Mobile nav */
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: var(--color-white);
    padding: 6rem 2.5rem 2.5rem;
    gap: 0;
    transition: right var(--transition-base);
    box-shadow: -4px 0 30px rgba(0, 0, 0, 0.1);
  }

  .nav__menu.active {
    right: 0;
  }

  .nav__menu li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav__menu .nav__link {
    color: var(--color-text) !important;
    font-size: 0.9rem;
    opacity: 1;
  }

  .nav__link--cta {
    border: none !important;
    padding: 0.75rem 0 !important;
  }

  /* Hero */
  .hero__title {
    letter-spacing: 0.06em;
  }

  /* Credentials */
  .credentials__inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .credentials__divider {
    display: none;
  }

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

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

  /* Portfolio */
  .portfolio__grid {
    grid-template-columns: 1fr;
  }

  .portfolio__item--wide {
    grid-column: span 1;
  }

  .portfolio__overlay {
    opacity: 1;
  }

  /* Contact */
  .contact__content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* Section alignment */
  .section__title {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero__label {
    font-size: 0.85rem;
  }

  .section__title {
    font-size: 1.4rem;
    letter-spacing: 0.1em;
  }
}