/* ============================================================
   LINEA — Architecture Studio Portfolio
   Monochrome, typographic, grid-based
   ============================================================ */

:root {
  --black: #111111;
  --white: #ffffff;
  --gray-400: #777777;
  --gray-300: #aaaaaa;
  --gray-200: #dddddd;
  --gray-100: #f4f4f4;
  --hairline: 1px solid var(--gray-200);

  --font-display: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --text-xs: clamp(0.6875rem, 0.66rem + 0.12vw, 0.75rem);
  --text-sm: clamp(0.8125rem, 0.79rem + 0.1vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.91rem + 0.12vw, 1rem);
  --text-md: clamp(1.0625rem, 1.02rem + 0.2vw, 1.1875rem);
  --text-lg: clamp(1.25rem, 1.16rem + 0.4vw, 1.5rem);
  --text-xl: clamp(1.625rem, 1.46rem + 0.75vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.72rem + 1.3vw, 2.875rem);
  --text-3xl: clamp(2.5rem, 2.05rem + 2.1vw, 3.875rem);

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  --container-max: 1200px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --radius-sm: 2px;
  --radius-md: 4px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);

  --transition-fast: 0.2s ease;
  --transition-med: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-display);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover { color: var(--gray-400); }

ul, ol { list-style: none; }

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--black);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { margin-bottom: var(--space-md); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
  margin-bottom: var(--space-sm);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

main {
  flex: 1;
}

section {
  padding: var(--space-3xl) 0;
}

/* ---------- Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: var(--hairline);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
  color: var(--black);
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
}

.logo .logo-dot {
  width: 6px;
  height: 6px;
  background: var(--black);
  border-radius: 50%;
  display: inline-block;
  align-self: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-list a {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  position: relative;
  padding: var(--space-2xs) 0;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--black);
  transition: width var(--transition-med);
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--black);
}

.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--black);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  border-bottom: var(--hairline);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.hero h1 {
  font-weight: 400;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.hero-statement {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--gray-400);
  max-width: 52ch;
  margin-top: var(--space-md);
}

.hero-meta {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

/* ---------- Projects Grid (Index) ---------- */
.projects-index {
  padding: var(--space-2xl) 0 var(--space-4xl);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl) var(--space-xl);
  margin-top: var(--space-xl);
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
}

.project-card .card-drawing {
  border: var(--hairline);
  background: var(--white);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast);
}

.project-card:hover .card-drawing {
  border-color: var(--gray-400);
}

.project-card .card-drawing svg {
  width: 100%;
  height: 100%;
  padding: var(--space-lg);
}

.project-card .card-info {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
}

.project-card .card-name {
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.project-card .card-type {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
}

.project-card .card-year {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--gray-400);
}

/* ---------- Project Page ---------- */
.project-hero {
  padding: var(--space-4xl) 0 var(--space-2xl);
  border-bottom: var(--hairline);
}

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

.project-hero h1 {
  font-weight: 400;
  letter-spacing: -0.02em;
}

.project-facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: var(--space-xs);
}

.project-facts .fact {
  border-top: var(--hairline);
  padding-top: var(--space-xs);
}

.project-facts .fact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  display: block;
}

.project-facts .fact-value {
  font-size: var(--text-base);
  font-weight: 500;
}

.project-description {
  max-width: 60ch;
  font-size: var(--text-md);
  line-height: 1.7;
  color: var(--gray-400);
  margin-top: var(--space-xl);
}

.drawing-section {
  padding: var(--space-2xl) 0;
}

.drawing-block {
  margin-bottom: var(--space-3xl);
}

.drawing-block:last-child {
  margin-bottom: 0;
}

.drawing-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  border-bottom: var(--hairline);
  padding-bottom: var(--space-xs);
}

.drawing-label .drawing-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gray-400);
}

.drawing-label .drawing-scale {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--gray-300);
}

.drawing-canvas {
  border: var(--hairline);
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  padding: var(--space-lg);
}

.drawing-canvas svg {
  width: 100%;
  height: auto;
  max-height: 600px;
}

/* ---------- Studio Page ---------- */
.studio-statement {
  max-width: 60ch;
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--gray-400);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl) var(--space-xl);
  margin-top: var(--space-xl);
}

.team-member {
  border-top: var(--hairline);
  padding-top: var(--space-md);
}

.team-member .member-name {
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.team-member .member-role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-top: var(--space-2xs);
}

.team-member .member-bio {
  font-size: var(--text-sm);
  color: var(--gray-400);
  margin-top: var(--space-sm);
  max-width: 40ch;
}

/* ---------- Contact Page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-invite {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--gray-400);
  max-width: 48ch;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.contact-channel {
  border-top: var(--hairline);
  padding-top: var(--space-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.contact-channel .channel-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

.contact-channel .channel-value {
  font-size: var(--text-base);
  font-weight: 500;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-display);
  font-size: var(--text-base);
  padding: var(--space-sm) 0;
  border: none;
  border-bottom: var(--hairline);
  background: transparent;
  color: var(--black);
  transition: border-color var(--transition-fast);
  resize: vertical;
  border-radius: 0;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-bottom-color: var(--black);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-300);
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: var(--space-sm) var(--space-xl);
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
  transition: background var(--transition-fast), color var(--transition-fast);
  align-self: flex-start;
}

.btn:hover {
  background: var(--white);
  color: var(--black);
}

.btn-secondary {
  background: transparent;
  color: var(--black);
}

.btn-secondary:hover {
  background: var(--black);
  color: var(--white);
}

.form-confirmation {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--gray-400);
  border-top: var(--hairline);
  padding-top: var(--space-md);
  display: none;
}

.form-confirmation.visible {
  display: block;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: var(--hairline);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: 0.02em;
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  display: flex;
  gap: var(--space-lg);
}

.footer-meta a {
  color: var(--gray-400);
}

.footer-meta a:hover {
  color: var(--black);
}

/* ---------- Reveal on Scroll ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html.js .draw-line {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.2s ease;
}

html.js .draw-line.visible {
  stroke-dashoffset: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-md) var(--gutter);
    border-bottom: var(--hairline);
    display: none;
  }

  .nav-list.open {
    display: flex;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: var(--space-sm) 0;
    border-bottom: var(--hairline);
    width: 100%;
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .project-hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .site-footer .container {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  section {
    padding: var(--space-2xl) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }

  html.js .draw-line {
    stroke-dashoffset: 0;
  }
}