/* ═══════════════════════════════════════════
   ELVA — Premium Digital Venture Studio
   Dark, Minimal, Editorial, Luxury
   ═══════════════════════════════════════════ */

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

:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1a1a1a;
  --border: #222222;
  --border-light: #2a2a2a;
  --text-primary: #f0f0f0;
  --text-secondary: #999999;
  --text-muted: #666666;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.1);
  --white: #ffffff;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

.label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

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

.navbar-logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.navbar-logo span {
  color: var(--accent);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.navbar-links a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.navbar-links a:hover {
  color: var(--text-primary);
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: var(--transition);
}

.navbar-links a:hover::after {
  width: 100%;
}

.btn-login {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.btn-login:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

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

.menu-toggle span {
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--white);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 0;
  letter-spacing: 0.1em;
}

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

.btn-ghost .arrow {
  transition: var(--transition);
}

.btn-ghost:hover .arrow {
  transform: translateX(4px);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 6rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(200, 255, 0, 0.03) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
}

.hero-label {
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── Section Headers ── */
.section-header {
  margin-bottom: 4rem;
}

.section-header .label {
  margin-bottom: 1rem;
  display: block;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 520px;
  margin-top: 1rem;
  font-size: 1.05rem;
}

/* ── Systems Grid (What We Build) ── */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.system-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.system-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.system-card:hover::before {
  opacity: 1;
}

.system-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.system-card h3 {
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.system-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ── Featured Case Study ── */
.featured-case {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}

.featured-case:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.featured-case-image {
  width: 100%;
  height: 100%;
  min-height: 400px;
  overflow: hidden;
  position: relative;
}

.featured-case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.featured-case:hover .featured-case-image img {
  transform: scale(1.04);
}

.featured-case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, rgba(0,0,0,0.3));
}

.featured-case-body {
  padding: 3.5rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-case-body .case-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.featured-case-body h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 1rem;
  font-weight: 500;
}

.featured-case-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

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

  .featured-case-image {
    min-height: 240px;
  }

  .featured-case-body {
    padding: 2rem;
  }
}

/* ── HDWM Links ── */
.hdwm-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.hdwm-links a {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: var(--transition);
}

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

/* ── Featured Case Placeholder ── */
.featured-case-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  text-align: center;
}

/* ── Workspace Preview ── */
.workspace-section {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.workspace-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.workspace-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #00d4ff, var(--accent));
}

.workspace-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.workspace-dots {
  display: flex;
  gap: 6px;
}

.workspace-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-light);
}

.workspace-dots span:first-child { background: #ff5f57; }
.workspace-dots span:nth-child(2) { background: #ffbd2e; }
.workspace-dots span:nth-child(3) { background: #28c840; }

.workspace-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.workspace-tile {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: var(--transition);
}

.workspace-tile:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.workspace-tile-icon {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.workspace-tile h4 {
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.workspace-tile p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Products / Labs ── */
.labs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.lab-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition);
  position: relative;
}

.lab-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.lab-card-status {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 1.25rem;
}

.lab-card-status.live {
  background: rgba(40, 200, 64, 0.15);
  color: #28c840;
}

.lab-card-status.dev {
  background: rgba(255, 189, 46, 0.15);
  color: #ffbd2e;
}

.lab-card-status.soon {
  background: rgba(200, 255, 0, 0.1);
  color: var(--accent);
}

.lab-card h3 {
  margin-bottom: 0.5rem;
}

.lab-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ── How We Work ── */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--border);
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}

.process-step:hover .process-number {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.process-step h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.process-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ── Partnership CTA ── */
.cta-section {
  text-align: center;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(200, 255, 0, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  font-size: 1.05rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-socials {
  display: flex;
  gap: 1.5rem;
}

.footer-socials a {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  transition: var(--transition);
}

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

/* ── About Page ── */
.about-hero {
  padding-top: 10rem;
  padding-bottom: 4rem;
}

.about-hero h1 {
  margin-bottom: 1.5rem;
}

.about-hero h1 em {
  color: var(--accent);
  font-style: italic;
}

.about-hero p {
  color: var(--text-secondary);
  max-width: 640px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-values {
  border-top: 1px solid var(--border);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.value-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-card);
}

.value-card h3 {
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* Team */
.team-section {
  border-top: 1px solid var(--border);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 560px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.team-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.team-card-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.team-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  filter: grayscale(100%);
  transition: var(--transition);
}

.team-card:hover .team-card-image img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.team-card-info {
  padding: 1.25rem 1.5rem 1.5rem;
}

.team-card-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
}

.team-card-info .role {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.team-card-info p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* About mission */
.about-mission {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.mission-content {
  max-width: 720px;
}

.mission-content h2 {
  margin-bottom: 1.5rem;
}

.mission-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3rem;
  max-width: 440px;
  width: 90%;
  text-align: center;
  transform: translateY(20px) scale(0.97);
  transition: var(--transition);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.5rem;
}

.modal h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.modal p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

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

/* ── Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ── Responsive ── */
@media (max-width: 1024px) {
  .systems-grid,
  .labs-grid,
  .workspace-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  section {
    padding: 5rem 0;
  }

  .navbar-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
  }

  .navbar-links.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
    z-index: 1001;
  }

  .systems-grid,
  .labs-grid,
  .workspace-grid,
  .cases-grid,
  .process-grid,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .process-grid::before {
    display: none;
  }

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

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

  .hero-buttons {
    flex-direction: column;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}