/* ==========================================================================
   Design Tokens & Variables
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #FFFFFF;
  --color-text: #1C1C1C;
  --color-accent: #fc9712;
  /* orange */
  --color-muted: #8E8E8E;
  --color-border: #EAEAEA;

  /* Typography */
  --font-primary: 'Outfit', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.5rem;
  --text-display: 5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;
  --space-24: 12rem;

  /* Layout */
  --container-max: 1440px;
  --container-padding: var(--space-4);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-8);
    --text-display: 8rem;
  }
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.02em;
}

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

/* ==========================================================================
   Header Component
   ========================================================================== */
.site-header {
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.site-header.scrolled {
  border-color: var(--color-border);
}

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

.logo {
  font-size: calc(var(--text-lg) + 5pt);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.main-nav ul {
  display: flex;
  gap: var(--space-4);
}

.main-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.site-footer {
  padding: var(--space-12) 0 var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-16);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

.footer-text {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

/* ==========================================================================
   Typography Classes
   ========================================================================== */
.text-display {
  font-size: var(--text-display);
  font-weight: 500;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
}

.text-lead {
  font-size: var(--text-xl);
  color: var(--color-muted);
  max-width: 600px;
  margin-bottom: var(--space-8);
  font-weight: 300;
}

/* ==========================================================================
   Project Grid (Index)
   ========================================================================== */
.hero {
  padding: var(--space-16) 0 var(--space-8);
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-16);
}

@media (min-width: 768px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12) var(--space-6);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  group: true;
  /* Tailwind-like concept, implemented via descendant selectors */
  cursor: pointer;
}

.project-image-wrapper {
  overflow: hidden;
  border-radius: 4px;
  margin-bottom: var(--space-4);
  aspect-ratio: 4/3;
  background-color: var(--color-border);
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.project-card:hover .project-image {
  transform: scale(1.03);
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  color: var(--color-accent);
}

.project-subtitle {
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Project Detail (Case Study)
   ========================================================================== */
.project-header {
  padding: var(--space-16) 0 var(--space-8);
  /* max-width removed to allow grid expansion */
}

.project-title-large {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.project-header-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.project-meta-info {
  text-align: right;
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-top: 0.5rem;
}

.project-main-text {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-text);
}

.project-main-text p {
  margin-bottom: var(--space-4);
}

.project-interspersed-text {
  width: 66.66%;
  margin: 0 auto;
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-text);
}

.project-interspersed-text p {
  margin-bottom: var(--space-4);
}

@media (max-width: 768px) {
  .project-header-grid {
    grid-template-columns: 1fr;
  }

  .project-meta-info {
    text-align: left;
    border-top: none;
    border-bottom: 1px solid var(--color-border);
    padding-top: 0;
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-4);
  }

  .project-interspersed-text {
    width: 100%;
  }
}

.project-content-flow {
  display: flex;
  flex-direction: column;
  gap: 80px;
  /* 80px spacing between image and text */
  margin-bottom: var(--space-16);
}

.project-content-flow .gallery-image {
  margin-bottom: 0;
  width: 100%;
  border-radius: 4px;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: 4px;
  width: 100%;
}

.video-container iframe {
  position: absolute !important;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

/* Loading State */
.loading {
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.loaded {
  opacity: 1;
}

.loader {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 50vh;
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}