/**
 * Design System — Personal Website
 * Sync with Figma: Variables → export or token plugin.
 */

/* ==========================================================================
   TOKENS
   ========================================================================== */

:root {
  /* ── Colors ─────────────────────────────────────────────────────────── */
  --primary-background-color: #ffffff;
  --primary-text-color: #000000;
  --footer-text-color: #C0C0C5;
  --logo-color-blue: #6de6fe;
  --border-thin: 1px solid var(--primary-text-color);

  /* ── Typography ─────────────────────────────────────────────────────── */
  --font-sans: "Josefin Sans", sans-serif;
  --font-size-h2: 1.5rem;     /* 24px — titles, skills */
  --font-size-body: 1rem;      /* 16px */
  --font-regular: 400;
  --font-medium: 500;
  --font-bold: 700;
  --line-height-heading: 1.2;
  --line-height-body: 1.5;
  --tracking-wide: 0.025em;

  /* ── Spacing ────────────────────────────────────────────────────────── */
  --space-2: 0.5rem;   /* 8px */
  --space-4: 1rem;     /* 16px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-12: 3rem;    /* 48px */
  --spacing-sm: var(--space-2);
  --spacing-md: var(--space-4);
  --spacing-lg: var(--space-8);
  --spacing-xl: var(--space-12);

  /* ── Layout ──────────────────────────────────────────────────────────── */
  --page-margin-top: 8px;
  --page-margin-bottom: 0px;
  --page-margin-inline: 80px;
  --grid-gutter: 60px;
  --z-sticky: 200;
}

/* ==========================================================================
   PAGE LAYOUT
   ========================================================================== */

html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: var(--page-margin-top) var(--page-margin-inline) var(--page-margin-bottom);
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--primary-text-color);
  background-color: var(--primary-background-color);
  -webkit-font-smoothing: antialiased;
}

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

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

.ds-container {
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
  padding-inline: 0;
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--primary-background-color);
}

.site-header .ds-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
}

.logo-link {
  display: flex;
  align-items: center;
  line-height: 0;
}

.logo-img {
  display: block;
  width: 44px;
  height: 44px;
  object-fit: contain;
  vertical-align: middle;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.site-nav a {
  text-decoration: none;
  color: inherit;
}

.nav-item {
  position: relative;
  height: 1.6em;
  overflow: hidden;
  cursor: pointer;
  display: inline-block;
}

.nav-item-text {
  position: relative;
  display: block;
  transition: transform 0.4s cubic-bezier(0.76, 0, 0.24, 1);
}

.nav-item-text span {
  display: block;
  padding: 0.25em 0; 
  font-family: var(--font-sans);
  font-size: 16px; /* was 18px */
  font-weight: var(--font-bold);
  align-items: center;
  color: var(--primary-text-color);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-item-text span:first-child {
  color: var(--primary-text-color);
}

.nav-item-text span:last-child {
  color: var(--logo-color-blue);
}

.nav-item:hover .nav-item-text,
.nav-item:focus-visible .nav-item-text {
  transform: translateY(-50%);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  width: 100%;
  padding-block: var(--spacing-lg) var(--spacing-sm);
  color: var(--footer-text-color);
}

.site-footer .ds-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  width: 100%;
}

@media (max-width: 767px) {
  .site-footer .ds-container {
    justify-content: center;
  }
}

.site-footer a {
  font-size: var(--font-size-body);
  font-weight: var(--font-regular);
  color: var(--footer-text-color);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--primary-text-color);
}

/* ==========================================================================
   PROJECTS (font only)
   ========================================================================== */

.project-card-title {
  font-family: var(--font-sans);
  font-size: var(--font-size-h2);
  font-weight: var(--font-medium);
  line-height: var(--line-height-heading);
  color: var(--primary-text-color);
}

.project-card-desc {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  font-weight: var(--font-regular);
  line-height: var(--line-height-body);
  color: #C0C0C5;
}

/* ==========================================================================
   PROJECT DETAIL PAGES (shared styles)
   ========================================================================== */

/* Project detail page container */
.project-detail-main .ds-container {
  max-width: none;
  padding-inline: 200px;
}

/* Full-bleed header on project detail pages */
.project-detail-page .site-header {
  margin-inline: calc(-1 * var(--page-margin-inline));
  padding-inline: var(--page-margin-inline);
}

/* Top hero section */
.project-detail-hero {
  margin-top: 0;
  margin-inline: calc(-1 * var(--page-margin-inline));
}

.project-detail-hero-image,
.project-detail-hero video {
  width: 100%;
  height: 100vh;
  display: block;
  object-fit: cover;
}

/* Breadcrumb */
.project-detail-breadcrumb {
  grid-column: 1 / span 4;
  margin: var(--spacing-lg) 0 var(--spacing-md);
  font-family: 'Fira Mono', monospace;
  font-size: 1rem; /* 12px */
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--logo-color-blue);
}

/* 4-column text grid (gutter 40) */
.project-detail-content {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.project-detail-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 40px;
  row-gap: var(--spacing-md);
  align-items: flex-start;
}

/* Title and subtitle */
.project-detail-title {
  grid-column: 1 / span 4;
  font-family: var(--font-sans);
  font-size: 3.5rem; /* 56px */
  font-weight: var(--font-medium);
  line-height: var(--line-height-heading);
  margin: 0 0 var(--space-2);
}

.project-detail-subtitle {
  grid-column: 1 / span 4;
  font-family: var(--font-sans);
  font-size: var(--font-size-h2); /* same as project titles on Home */
  font-weight: var(--font-regular);
  line-height: var(--line-height-heading);
  color: var(--primary-text-color);
  margin-top: var(--spacing-lg);
  margin-bottom: 0.25rem;
  text-align: right;
}

/* Meta labels and values */
.project-detail-meta-label {
  font-family: 'Fira Mono', monospace;
  font-size: 1rem;
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--logo-color-blue);
  margin: 0 0 0.25rem;
}

.project-detail-meta-value {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  font-weight: var(--font-medium);
  margin: 0;
}

/* Meta row: timeline / role / tools / team */
.project-detail-meta-block {
  grid-column: 1 / span 4;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 40px;
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  border-top: 1.6px solid #E1E2E7;
}

.project-detail-meta-col {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

/* Body section */
.project-detail-body {
  grid-column: 1 / span 4;
  margin-top: var(--spacing-xl);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 40px;
  align-items: center;
}

.project-detail-body-row {
  display: contents;
}

.project-detail-body-divider {
  grid-column: 1 / span 4;
  margin: var(--spacing-md) 0;
  border-top: 1.6px solid #E1E2E7;
}

.project-detail-body-label {
  font-family: 'Fira Mono', monospace;
  font-size: 1.125rem; /* 18px */
  text-transform: lowercase;
  letter-spacing: var(--tracking-wide);
  color: var(--logo-color-blue);
  align-self: center;
}

.project-detail-body-text {
  font-family: var(--font-sans);
  font-size: 1.125rem; /* 18px */
  font-weight: var(--font-regular);
  line-height: var(--line-height-body);
  align-self: center;
}

.project-detail-body-row--primary .project-detail-body-label {
  grid-column: 1 / span 1;
}

.project-detail-body-row--primary .project-detail-body-text {
  grid-column: 2 / span 3;
}

.project-detail-body-row--secondary .project-detail-body-text {
  grid-column: 1 / span 3;
}

.project-detail-body-row--secondary .project-detail-body-label {
  grid-column: 4 / span 1;
  text-align: right;
}

.project-detail-body-text p {
  margin: 0 0 var(--spacing-md);
}

.project-detail-body-text p:last-child {
  margin-bottom: 0;
}

/* Gallery section */
.project-detail-gallery {
  margin-top: 5rem;
  margin-bottom: var(--spacing-xl);
}

/* Responsive: project detail pages */
@media (max-width: 1199px) {
  .project-detail-main .ds-container {
    padding-inline: var(--page-margin-inline);
  }

  .project-detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-detail-title,
  .project-detail-subtitle,
  .project-detail-body {
    grid-column: 1 / -1;
  }

  .project-detail-meta-block,
  .project-detail-credits-block {
    grid-column: 1 / -1;
  }

  .project-detail-body {
    grid-template-columns: 1fr;
  }

  .project-detail-body-label,
  .project-detail-body-text {
    grid-column: 1 / -1;
    text-align: left;
  }
}

@media (max-width: 767px) {
  .project-detail-main .ds-container {
    padding-inline: var(--spacing-md);
  }
}

/* ==========================================================================
   PROJECT DETAIL ANIMATIONS (shared)
   ========================================================================== */

/* Fade + slide up on scroll reveal */
.anim-fade-up {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Slide in from left */
/* .anim-slide-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

.anim-slide-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide in from right */
.anim-slide-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

.anim-slide-right.is-visible {
  opacity: 1;
  transform: translateX(0);
} */

/* Stagger delay utilities */
.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; }
.anim-delay-5 { transition-delay: 0.5s; }
.anim-delay-6 { transition-delay: 0.6s; }

/* Hero title entrance */
.project-detail-title {
  animation: heroTitleIn 1s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.project-detail-subtitle {
  animation: heroTitleIn 1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

.project-detail-breadcrumb {
  animation: heroTitleIn 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.05s both;
}

.project-detail-meta-block {
  animation: heroTitleIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both;
}

@keyframes heroTitleIn {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Section header: label slides in, divider drops down like a curtain */
.retro-section-divider {
  overflow: hidden;
  position: relative;
  background-color: transparent;
}

.retro-section-divider::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #E1E2E7;
  transform: translateY(-100%);
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.15s;
}

.retro-section-header.is-visible .retro-section-divider::after {
  transform: translateY(0%);
}

.retro-section-label {
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 0.5s ease 0.1s, transform 0.5s ease 0.1s;
}

.retro-section-header.is-visible .retro-section-label {
  opacity: 1;
  transform: translateX(0);
}

/* Solution feature number pop on hover */
.retro-solution-index {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.3s;
}

.retro-solution-feature:hover .retro-solution-index {
  transform: scale(1.25) translateY(-2px);
}

/* Intro icon float (used on Retrosphere intro) */
.retro-intro-icon {
  animation: floatIcon 3.5s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* Background card note hover */
.retro-background-note {
  transition: letter-spacing 0.3s ease;
}

.retro-background-card:hover .retro-background-note {
  letter-spacing: 0.04em;
}

/* Storyboard list items stagger */
.retro-dev-body--storyboard ul li {
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.retro-dev-body--storyboard.is-visible ul li:nth-child(1) {
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}
.retro-dev-body--storyboard.is-visible ul li:nth-child(2) {
  opacity: 1;
  transform: none;
  transition-delay: 0.1s;
}
.retro-dev-body--storyboard.is-visible ul li:nth-child(3) {
  opacity: 1;
  transform: none;
  transition-delay: 0.2s;
}

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