/* =====================================================
   Colluzions — Interactive Art & Creative Technology
   Shared stylesheet
   ===================================================== */

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

:root {
  --bg:           #08090d;
  --surface:      #0f1018;
  --surface-2:    #161820;
  --border:       rgba(255,255,255,0.08);
  --text:         #e8eaf0;
  --text-muted:   #7a7f96;
  --accent:       #6c63ff;
  --accent-2:     #00d4ff;
  --accent-3:     #ff3cac;
  --glow-purple:  rgba(108,99,255,0.35);
  --glow-cyan:    rgba(0,212,255,0.25);
  --glow-pink:    rgba(255,60,172,0.2);
  --font-head:    'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-body:    'Inter', 'Helvetica Neue', Arial, sans-serif;
  --max:          1140px;
  --radius:       6px;
  --transition:   0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: var(--accent-2); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }
ul { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
}

h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.1rem; }

p { color: var(--text); max-width: 68ch; }

.label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-2);
}

/* ── Layout helpers ── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 6rem 0; }
.section--sm { padding: 4rem 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Gradient text ── */
.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.1rem 0;
  background: rgba(8,9,13,0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: #fff;
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  transform: scaleX(0.78);
  transform-origin: left center;
}

.logo-col  { color: var(--accent); }
.logo-luz  { color: var(--accent-2); }
.logo-ions { color: #fff; }
.logo-dot  { color: var(--accent-2); font-weight: 400; font-size: 0.9em; padding: 0 0.05em; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav__links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: #fff;
  background: rgba(255,255,255,0.07);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 860px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(8,9,13,0.97);
    gap: 0.5rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
  }
  .nav__links.open { transform: translateX(0); }
  .nav__links a { font-size: 1.4rem; padding: 0.7rem 1.5rem; }
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Animated gradient orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  animation: drift 14s ease-in-out infinite;
}

.orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: -100px; left: -150px;
  animation-delay: 0s;
}

.orb--2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
  top: 20%; right: -100px;
  animation-delay: -4s;
}

.orb--3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--accent-3) 0%, transparent 70%);
  bottom: 0; left: 30%;
  animation-delay: -8s;
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(40px, -30px) scale(1.05); }
  66%       { transform: translate(-20px, 40px) scale(0.97); }
}

/* Scanline texture */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.12) 2px,
    rgba(0,0,0,0.12) 4px
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: 2rem 0 4rem;
}

.hero__eyebrow {
  margin-bottom: 1.2rem;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1;
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: baseline;
  transform: scaleX(0.78);
  transform-origin: left center;
}

.hero__dot {
  color: var(--accent-2);
  font-weight: 300;
  font-size: 0.7em;
  padding: 0 0.05em;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  max-width: none;
}

.hero__tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.55rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2.5rem;
  max-width: none;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero__scroll {
  margin-top: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__scroll::before {
  content: '';
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--accent-2));
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 1; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 0 30px rgba(108,99,255,0.4);
}

.btn--primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(108,99,255,0.6);
}

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

.btn--outline:hover {
  color: #fff;
  border-color: var(--accent-2);
  box-shadow: 0 0 20px var(--glow-cyan);
  transform: translateY(-2px);
}

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(108,99,255,0.4);
  box-shadow: 0 8px 40px rgba(108,99,255,0.12);
  transform: translateY(-3px);
}

.card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.6rem;
}

.card__body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Section header ── */
.section-header {
  margin-bottom: 3.5rem;
}

.section-header p {
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ── Divider ── */
.divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  margin: 1.2rem 0;
}

/* ── Tag pills ── */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0;
}

.tag {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition);
}

.tag:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* ── Page hero (inner pages) ── */
.page-hero {
  padding: 9rem 0 5rem;
  position: relative;
  overflow: hidden;
  text-align: left;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-hero__bg .orb { opacity: 0.3; }

.page-hero__content {
  position: relative;
  z-index: 1;
}

.page-hero__content h1 {
  margin-top: 0.8rem;
  margin-bottom: 1.2rem;
}

.page-hero__content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 60ch;
}

/* ── Feature list ── */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.feature {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.feature__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.feature__text h4 { margin-bottom: 0.35rem; }
.feature__text p { color: var(--text-muted); font-size: 0.93rem; }

/* ── Quote / pull text ── */
.pull-quote {
  border-left: 3px solid var(--accent);
  padding: 1.5rem 2rem;
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  margin: 2.5rem 0;
}

.pull-quote p {
  font-size: 1.2rem;
  font-style: italic;
  color: var(--text);
  max-width: none;
}

/* ── Showcase video grid ── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.video-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.video-card:hover {
  box-shadow: 0 8px 40px rgba(0,212,255,0.12);
  transform: translateY(-3px);
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}

.video-card__meta {
  padding: 1.2rem 1.4rem;
}

.video-card__number {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.3rem;
}

.video-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

/* ── Links row (homepage) ── */
.links-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.link-card {
  display: block;
  padding: 2rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  color: var(--text);
}

.link-card:hover {
  border-color: var(--accent-2);
  box-shadow: 0 0 30px var(--glow-cyan);
  transform: translateY(-4px);
  color: #fff;
}

.link-card__icon { font-size: 2.2rem; margin-bottom: 0.8rem; }
.link-card__name { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 0.4rem; }
.link-card__desc { font-size: 0.83rem; color: var(--text-muted); }

@media (max-width: 860px) { .links-row { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .links-row { grid-template-columns: 1fr; } }

/* ── About word-mark ── */
.wordmark-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2.5rem 0;
}

.wm-part {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem 1.8rem;
  text-align: center;
  min-width: 130px;
}

.wm-letters {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.wm-def {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* ── Contact ── */
.contact-box {
  max-width: 600px;
  text-align: center;
  margin: 0 auto;
}

.contact-email {
  display: inline-block;
  margin: 2rem 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.contact-email:hover { color: #fff; }

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer__logo {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: #fff;
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  transform: scaleX(0.78);
  transform-origin: left center;
}

.footer__links {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.footer__links a {
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius);
  transition: color var(--transition);
}

.footer__links a:hover { color: #fff; }

.footer__copy {
  font-size: 0.78rem;
  color: var(--text-muted);
  width: 100%;
}

/* ── Particle canvas ── */
#particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Utility ── */
.text-center { text-align: center; }
.text-center p { margin: 0 auto; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* ── Glow line ── */
.glow-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  margin: 4rem 0;
  opacity: 0.5;
}

/* ── Fade-in on scroll ── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Highlight band ── */
.band {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}