/* iova — Product development from idea to market */

:root {
  /* Molten Brilliance palette */
  --color-bg: #050200;
  --color-bg-elevated: #0a0402;
  --color-surface: rgba(20, 10, 5, 0.6);
  --color-border: rgba(255, 85, 0, 0.2);
  --color-text: #ffffff;
  --color-text-muted: #c0b0a0;
  --color-text-subtle: #8f8072;
  --color-accent: #ff5500;
  --color-accent-alt: #ffaa00;
  --color-accent-muted: rgba(255, 85, 0, 0.2);
  /* Typography */
  --font-heading: "Syne", system-ui, sans-serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --font-cjk: "Noto Sans SC", system-ui, sans-serif;
  --text-base: 1rem;
  --text-sm: 0.875rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;
  --text-6xl: clamp(2.75rem, 6vw, 4.5rem);
  --text-7xl: clamp(3.25rem, 7vw, 5.5rem);
  --line-tight: 1.15;
  --line-normal: 1.5;
  --line-relaxed: 1.65;
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;
  /* Layout */
  --container: min(90vw, 72rem);
  --header-height: 4rem;
  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--line-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
button { font: inherit; cursor: pointer; }
ul, ol { list-style: none; margin: 0; padding: 0; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 600;
  border-radius: 4px;
  transition: top var(--duration-normal) var(--ease-out);
}
.skip-link:focus { top: var(--space-md); }

/* Container */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--space-lg); }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(10, 4, 2, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-normal) var(--ease-out), border-color var(--duration-normal) var(--ease-out);
}
.site-header.is-scrolled { background: rgba(10, 4, 2, 0.9); }
.header-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  text-transform: lowercase;
}
.logo-mark {
  font-size: 0.76em;
  color: var(--color-accent);
  margin-left: 0.12rem;
  font-family: var(--font-cjk);
}
.logo:hover { color: var(--color-accent); }
.nav ul { display: flex; align-items: center; gap: var(--space-xl); }
.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}
.nav a:hover { color: var(--color-accent); text-shadow: 0 0 12px rgba(255, 85, 0, 0.8); }
.nav-cta {
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  border-radius: 6px;
  border: 1px solid var(--color-border);
}
.nav-cta:hover { color: var(--color-accent); box-shadow: 0 0 18px rgba(255, 85, 0, 0.6); }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: none;
  color: var(--color-text);
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out);
}
.nav-mobile { display: none; }

@media (max-width: 768px) {
  .nav { display: none; }
  .menu-toggle { display: flex; }
  .nav-mobile {
    display: block;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(3, 3, 5, 0.9);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    backdrop-filter: blur(12px);
  }
  .nav-mobile[hidden] { display: none; }
  .nav-mobile ul { flex-direction: column; gap: var(--space-md); }
  .nav-mobile a { font-size: var(--text-lg); }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  padding-bottom: var(--space-4xl);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to bottom, rgba(5, 2, 0, 0.3), rgba(5, 2, 0, 1)),
    url("/assets/hero-bg.png");
  background-size: cover;
  background-position: center;
  pointer-events: none;
  animation: mesh-flow 22s ease-in-out infinite alternate;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(255, 85, 0, 0.08), transparent 50%),
    linear-gradient(250deg, rgba(255, 170, 0, 0.08), transparent 45%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0 1px, transparent 1px 9px);
  mix-blend-mode: screen;
  animation: mesh-flow 26s ease-in-out infinite alternate-reverse;
}
.hero-inner {
  position: relative;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-lg);
  display: grid;
  gap: var(--space-3xl);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  animation: hero-fade 0.8s var(--ease-out) both;
}
@keyframes hero-fade {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
}
.hero-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-7xl);
  line-height: var(--line-tight);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 var(--space-lg);
  max-width: 16ch;
}
.motion-glow {
  color: var(--color-text);
  text-shadow: 0 0 10px rgba(255, 85, 0, 0.45);
  animation: heat-pulse 3s ease-in-out infinite;
}
.hero-lead {
  font-size: var(--text-lg);
  line-height: var(--line-relaxed);
  color: var(--color-text-muted);
  max-width: 42ch;
  margin: 0 0 var(--space-2xl);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.hero-scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-subtle);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-border), transparent);
  animation: scroll-pulse 2s var(--ease-in-out) infinite;
}
@keyframes scroll-pulse {
  0%, 100% { opacity: 0.5; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: 8px;
  border: none;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn-neon {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-alt) 100%);
  color: var(--color-text);
  border: 1px solid rgba(255, 170, 0, 0.4);
  box-shadow: 0 0 10px var(--color-accent), 0 0 30px var(--color-accent-alt);
}
.btn-neon:hover {
  box-shadow: 0 0 40px var(--color-accent), 0 0 60px var(--color-accent-alt);
  transform: translateY(-1px) scale(1.02);
}

/* Sections */
.section {
  padding-block: var(--space-4xl);
}
.section-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
}
.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-4xl);
  line-height: var(--line-tight);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 var(--space-md);
}
.section-intro {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin: 0 0 var(--space-2xl);
  line-height: var(--line-relaxed);
}

/* Services */
.section-services { background: var(--color-bg-elevated); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}
.service-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: border-color var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
  backdrop-filter: blur(12px);
}
.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-5px);
  box-shadow: 0 0 10px var(--color-accent), 0 0 24px var(--color-accent-alt);
}
.service-icon {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-accent);
  opacity: 0.9;
  margin-bottom: var(--space-md);
}
.service-card h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-xl);
  margin: 0 0 var(--space-sm);
}
.service-card p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--line-relaxed);
  margin: 0;
}

/* Process */
.section-process { background: var(--color-bg); }
.process-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  counter-reset: process;
}
.process-list > li {
  position: relative;
  padding-left: var(--space-2xl);
  counter-increment: process;
}
.process-list > li::before {
  content: counter(process);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-accent);
  opacity: 0.9;
}
.process-step {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-lg);
  display: block;
  margin-bottom: var(--space-sm);
}
.process-list p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--line-relaxed);
  margin: 0;
}

/* About */
.section-about { background: var(--color-bg-elevated); }

/* Impact */
.section-impact { background: var(--color-bg); }
.impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}
.impact-card {
  position: relative;
  padding: var(--space-xl);
  background: linear-gradient(180deg, rgba(255, 85, 0, 0) 0%, rgba(255, 170, 0, 0.05) 100%), var(--color-surface);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}
.impact-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent), 0 0 30px var(--color-accent-alt);
  transition: box-shadow var(--duration-normal) var(--ease-out), width var(--duration-normal) var(--ease-out);
}
.impact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 12px var(--color-accent), 0 0 30px var(--color-accent-alt);
}
.impact-card:hover::before {
  width: 3px;
  box-shadow: 0 0 18px var(--color-accent), 0 0 36px var(--color-accent-alt);
}
.impact-client {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}
.impact-hook {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}
.impact-solution {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
  line-height: var(--line-relaxed);
}
.impact-result {
  margin: 0;
  font-weight: 600;
  color: var(--color-text);
}
.impact-result span {
  color: var(--color-accent-alt);
}
.about-content { max-width: 60ch; margin-top: var(--space-xl); }
.about-lead {
  font-size: var(--text-lg);
  line-height: var(--line-relaxed);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg);
}
.about-content p:last-of-type {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--line-relaxed);
  margin: 0;
}

/* Work */
.section-work { background: var(--color-bg); }
.work-cta { margin-top: var(--space-xl); }

/* Contact */
.section-contact { background: var(--color-bg-elevated); }
.contact-status {
  display: none;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border-radius: 8px;
  font-size: var(--text-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.contact-status.is-success {
  border-color: rgba(16, 185, 129, 0.35);
  color: #10b981;
}
.contact-status.is-error {
  border-color: rgba(239, 68, 68, 0.4);
  color: #ef4444;
}
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.contact-form {
  max-width: 32rem;
  margin-top: var(--space-2xl);
}
.form-row {
  margin-bottom: var(--space-lg);
}
.form-row label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}
.form-row .optional { font-weight: 400; color: var(--color-text-subtle); }
.form-row input,
.form-row textarea {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: border-color var(--duration-fast) var(--ease-out);
}
.form-row input::placeholder,
.form-row textarea::placeholder { color: var(--color-text-subtle); }
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.form-row textarea { resize: vertical; min-height: 120px; }
.btn-submit { margin-top: var(--space-md); }

/* Footer */
.site-footer {
  padding-block: var(--space-3xl);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}
.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}
.footer-nav ul { display: flex; gap: var(--space-xl); }
.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.footer-nav a:hover { color: var(--color-accent); }
.footer-copy {
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  margin: 0;
}
.footer-social {
  display: flex;
  gap: var(--space-md);
}
.footer-social a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}
.footer-social a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent), 0 0 30px var(--color-accent-alt);
}
.footer-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

@media (max-width: 640px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .hero-title { font-size: var(--text-5xl); }
  .section-title { font-size: var(--text-3xl); }
}

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

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

@keyframes mesh-flow {
  0% { filter: saturate(1) brightness(1); }
  100% { filter: saturate(1.15) brightness(1.08); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes heat-pulse {
  0%, 100% { text-shadow: 0 0 10px rgba(255, 85, 0, 0.45); }
  50% { text-shadow: 0 0 18px rgba(255, 85, 0, 0.8), 0 0 30px rgba(255, 170, 0, 0.6); }
}