/* ===== Custom Properties ===== */
:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-accent: #4a90a4;
  --color-accent-light: #e8f4f8;
  --color-border: #e5e7eb;
  --color-badge-live: #059669;
  --color-badge-live-bg: #ecfdf5;
  --color-badge-progress: #d97706;
  --color-badge-progress-bg: #fffbeb;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --font-size-4xl: 4.5rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 6rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);

  --nav-height: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.nav--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--color-text);
}

.nav__logo-paren {
  color: var(--color-accent);
}

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

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

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

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

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--spacing-xl)) 0 var(--spacing-xl);
}

.hero .container {
  display: flex;
  justify-content: center;
}

.hero__content {
  max-width: 640px;
  margin: 0 auto;
}

.hero__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.accent {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  font-weight: 300;
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-family);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid transparent;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-surface);
  border-color: var(--color-text);
}

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

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

.btn--outline:hover {
  border-color: var(--color-text);
}

/* ===== Sections ===== */
.section {
  padding: var(--spacing-2xl) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xs);
}

.section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* ===== App Cards ===== */
.apps__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

.app-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.app-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}

.app-card__image {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-accent-light), #f3f4f6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-card__image--logo {
  background: #1a253b;
}

.app-card__image--logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-md);
}

.app-card__placeholder {
  color: var(--color-accent);
  opacity: 0.6;
}

.app-card__body {
  padding: var(--spacing-md);
}

.app-card__meta {
  margin-bottom: var(--spacing-xs);
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge--live {
  color: var(--color-badge-live);
  background: var(--color-badge-live-bg);
}

.badge--progress {
  color: var(--color-badge-progress);
  background: var(--color-badge-progress-bg);
}

.badge--soon {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.app-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.app-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.app-card__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  transition: color var(--transition);
}

.app-card__link:hover {
  color: var(--color-text);
}

/* ===== Masonry Artwork Grid ===== */
.artwork {
  background: var(--color-surface);
}

.masonry {
  columns: 3;
  column-gap: var(--spacing-sm);
}

.masonry__item {
  break-inside: avoid;
  margin-bottom: var(--spacing-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}

.masonry__item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.masonry__item img {
  width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

.masonry__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

.masonry__placeholder--tall {
  height: 380px;
}

.masonry__placeholder--medium {
  height: 280px;
}

.masonry__placeholder--short {
  height: 200px;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.lightbox--open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: white;
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.lightbox__close:hover {
  opacity: 1;
}

.lightbox__content {
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox__content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  text-align: center;
}

.footer__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.footer__text {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.footer__socials {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.footer__social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.footer__social:hover {
  color: var(--color-text);
  border-color: var(--color-text);
  transform: translateY(-2px);
}

.footer__bottom {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===== Fade-in Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 3rem;
    --font-size-3xl: 2.25rem;
    --font-size-2xl: 1.5rem;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(250, 250, 250, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) 0;
    gap: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }

  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    box-shadow: var(--shadow-md);
  }

  .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);
  }

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

  .masonry {
    columns: 2;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 2.25rem;
  }

  .masonry {
    columns: 1;
  }

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