/* ============================================
   German Heller - Premium Portfolio
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-black: #0a0a0a;
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  --spacing-4xl: 8rem;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 700ms cubic-bezier(0.4, 0, 0.2, 1);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.6;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

ul, ol {
  list-style: none;
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section--dark {
  background: var(--color-gray-900);
  color: var(--color-white);
}

.section--light {
  background: var(--color-gray-50);
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
}

.header.is-scrolled {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.header__logo {
  font-size: var(--font-size-base);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.header__logo:hover {
  opacity: 1;
}

.nav {
  display: flex;
  gap: var(--spacing-xl);
}

.nav a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-black);
  transition: width var(--transition-base) var(--ease-out-expo);
}

.nav a:hover {
  opacity: 1;
  color: var(--color-black);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-black);
  transition: all var(--transition-base);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
}

.hero__content {
  max-width: 800px;
  padding: var(--spacing-4xl) 0;
}

.hero__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-md);
}

.hero__title {
  font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
}

.hero__tagline {
  font-size: var(--font-size-xl);
  line-height: 1.6;
  color: var(--color-gray-600);
  max-width: 640px;
  margin-bottom: var(--spacing-xl);
}

.hero__tagline strong {
  color: var(--color-black);
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
}

.hero__scroll {
  position: absolute;
  bottom: var(--spacing-xl);
  left: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.hero__scroll span {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-gray-400);
  writing-mode: vertical-rl;
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-gray-300), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.5; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: 2px;
  transition: all var(--transition-base);
  cursor: pointer;
}

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

.btn--primary:hover {
  opacity: 1;
  background: transparent;
  color: var(--color-black);
}

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

.btn--secondary:hover {
  opacity: 1;
  border-color: var(--color-black);
}

/* --- Section Headers --- */
.section__header {
  margin-bottom: var(--spacing-3xl);
}

.section__header--center {
  text-align: center;
}

.section__label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-sm);
}

.section--dark .section__label {
  color: var(--color-gray-500);
}

.section__title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section__subtitle {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- About --- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.about__portrait-frame {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}

.about__portrait-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.about__lead {
  font-size: var(--font-size-xl);
  line-height: 1.6;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-lg);
}

.about__text p {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-600);
  line-height: 1.8;
}

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

.about__stats {
  display: flex;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--color-gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat__number {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat__label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
}

/* --- Projects --- */
.projects {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
}

.project {
  background: var(--color-gray-800);
  border-radius: 4px;
  overflow: hidden;
  transition: transform var(--transition-slow) var(--ease-out-expo);
}

.project:hover {
  transform: translateY(-8px);
}

.project__image {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.project__image-placeholder {
  width: 100%;
  height: 100%;
  background: var(--color-gray-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: transform var(--transition-slow) var(--ease-out-expo);
}

.project:hover .project__image-placeholder {
  transform: scale(1.05);
}

.project__overlay {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
}

.project__award-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-white);
  color: var(--color-black);
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 2px;
}

.project__content {
  padding: var(--spacing-lg);
}

.project__meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.project__year,
.project__role {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project__title {
  font-size: var(--font-size-xl);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-white);
}

.project__desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.project__tags span {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  padding: 4px 10px;
  border: 1px solid var(--color-gray-700);
  border-radius: 2px;
}

/* --- Logos --- */
.logos {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.logo-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.logo-placeholder {
  width: 100%;
  height: 60px;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  border-radius: 4px;
}

.logo-item > span {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* --- Awards --- */
.awards {
  max-width: 800px;
  margin: 0 auto;
}

.award {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.award:last-child {
  border-bottom: none;
}

.award__year {
  flex-shrink: 0;
  width: 60px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-400);
}

.award__info {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-md);
}

.award__name {
  font-size: var(--font-size-base);
  font-weight: 400;
}

.award__project {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  flex-shrink: 0;
}

/* --- Press --- */
.press-logos {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
  flex-wrap: wrap;
}

.press-logo {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-white);
  border-radius: 4px;
}

.press-quotes {
  max-width: 700px;
  margin: 0 auto var(--spacing-3xl);
}

.quote {
  text-align: center;
}

.quote p {
  font-size: var(--font-size-xl);
  font-style: italic;
  line-height: 1.7;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-md);
}

.quote cite {
  font-size: var(--font-size-sm);
  font-style: normal;
  color: var(--color-gray-500);
}

.press-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
}

.press-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  transition: all var(--transition-base);
}

.press-link:hover {
  opacity: 1;
  border-color: var(--color-black);
  transform: translateY(-2px);
}

.press-link__site {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Contact --- */
#contact {
  text-align: center;
  padding: var(--spacing-4xl) 0;
}

.contact__content {
  max-width: 600px;
  margin: 0 auto;
}

.contact__title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.contact__text {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-lg);
}

.contact__email {
  display: inline-block;
  font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-2xl));
  font-weight: 400;
  color: var(--color-white);
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.contact__email::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-gray-600);
  transition: background var(--transition-base);
}

.contact__email:hover {
  opacity: 1;
}

.contact__email:hover::after {
  background: var(--color-white);
}

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

.contact__links a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.contact__links a:hover {
  color: var(--color-white);
  opacity: 1;
}

/* --- Footer --- */
.footer {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-gray-100);
}

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

.footer p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* --- Animations --- */
.anim-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s var(--ease-out-expo),
    transform 0.8s var(--ease-out-expo);
}

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

.anim-delay-1 { transition-delay: 0.1s; }
.anim-delay-2 { transition-delay: 0.2s; }
.anim-delay-3 { transition-delay: 0.3s; }
.anim-delay-4 { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .about__portrait-frame {
    max-width: 300px;
  }

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

  .logos {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 5rem;
    --spacing-3xl: 4rem;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    font-size: var(--font-size-xl);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.is-active span:first-child {
    transform: translateY(3.75px) rotate(45deg);
  }

  .nav-toggle.is-active span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
  }

  .hero__content {
    padding: var(--spacing-2xl) 0;
  }

  .hero__scroll {
    display: none;
  }

  .hero__cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .about__stats {
    flex-wrap: wrap;
    gap: var(--spacing-lg);
  }

  .stat {
    min-width: 100px;
  }

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

  .award__info {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }

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

  .footer__inner {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .header__inner {
    height: 60px;
  }

  .nav {
    top: 60px;
  }
}

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

/* --- Focus States --- */
:focus-visible {
  outline: 2px solid var(--color-black);
  outline-offset: 4px;
}

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

  html {
    scroll-behavior: auto;
  }

  .anim-fade-up {
    opacity: 1;
    transform: none;
  }
}