/* ============================================================
   Vivo VST — Landing Page (standalone identity)
   Teal / Cyan · White · Black — inspired by the plugin UI
   Fonts: Exo 2 (titles) · Inter (body) · JetBrains Mono (labels)
   ============================================================ */

:root {
  --bg:          #060e0d;
  --bg-2:        #081514;
  --panel:       #0d2120;
  --panel-2:     #102927;
  --panel-hi:    #14322f;

  --cyan:        #2fd9d9;
  --cyan-bright: #6df0f0;
  --cyan-deep:   #15a3a3;

  --white:       #eafafa;
  --text:        #cfe9e8;
  --muted:       #7ca6a4;

  --border:      rgba(76, 224, 224, 0.14);
  --border-hover:rgba(76, 224, 224, 0.42);

  --font-title:  'Exo 2', sans-serif;
  --font-body:   'Inter', sans-serif;
  --font-mono:   'JetBrains Mono', monospace;

  --nav-h:       66px;
  --max-w:       1120px;
  --radius:      14px;
  --t:           0.28s ease;

  --glow:        0 0 22px rgba(47, 217, 217, 0.35);
}

/* ==============================
   RESET & BASE
   ============================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a   { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

::-webkit-scrollbar       { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--cyan-deep); border-radius: 3px; }

/* Ambient background glow + faint dot grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(ellipse 60% 45% at 50% 0%, rgba(47,217,217,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 85% 90%, rgba(21,163,163,0.06) 0%, transparent 70%),
    radial-gradient(rgba(76,224,224,0.05) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 32px 32px;
}

/* ==============================
   NAVBAR
   ============================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 200;
  transition: background var(--t), border-color var(--t), backdrop-filter var(--t);
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(8, 21, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo img {
  height: 26px;
  width: auto;
  filter: drop-shadow(0 0 10px rgba(47,217,217,0.45));
  transition: filter var(--t);
}
.nav-logo:hover img { filter: drop-shadow(0 0 16px rgba(47,217,217,0.75)); }

.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--t), text-shadow var(--t);
}
.nav-links a:hover { color: var(--cyan-bright); text-shadow: 0 0 10px rgba(47,217,217,0.6); }

.nav-right { display: flex; align-items: center; gap: 0.85rem; }

.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  transition: border-color var(--t);
}
.lang-toggle:hover { border-color: var(--border-hover); }
.lang-option { color: var(--muted); cursor: pointer; padding: 1px 2px; transition: color var(--t), text-shadow var(--t); }
.lang-option.active { color: var(--cyan-bright); text-shadow: 0 0 8px rgba(47,217,217,0.6); }
.lang-sep { color: rgba(255,255,255,0.14); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--muted); border-radius: 2px;
  transition: background var(--t);
}
.hamburger:hover span { background: var(--cyan); }

.mobile-menu {
  display: none;
  flex-direction: column;
  background: rgba(8,21,20,0.97);
  border-top: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  transition: color var(--t), background var(--t);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--cyan-bright); background: rgba(47,217,217,0.05); }

/* ==============================
   BUTTONS
   ============================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 2.2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #04201f;
  background: linear-gradient(135deg, var(--cyan-bright), var(--cyan));
  border: 1px solid var(--cyan-bright);
  border-radius: 9px;
  box-shadow: 0 0 18px rgba(47,217,217,0.28);
  transition: transform var(--t), box-shadow var(--t), filter var(--t);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 28px rgba(47,217,217,0.55), 0 0 60px rgba(47,217,217,0.22);
  filter: brightness(1.06);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 2.2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border-hover);
  border-radius: 9px;
  transition: background var(--t), border-color var(--t), color var(--t), box-shadow var(--t);
}
.btn-outline:hover {
  color: var(--cyan-bright);
  border-color: var(--cyan);
  background: rgba(47,217,217,0.07);
  box-shadow: 0 0 16px rgba(47,217,217,0.2);
}

/* ==============================
   HERO
   ============================== */
#vivo-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 3rem) 1.5rem 4rem;
  overflow: hidden;
}
.vivo-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(180deg, rgba(6,14,13,0.55), rgba(6,14,13,0.92)),
    url('../audio/img/vivo-promo-wide.png');
  background-size: cover;
  background-position: center 28%;
  filter: saturate(1.05);
}
.vivo-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 50% at 30% 45%, rgba(47,217,217,0.12), transparent 70%);
}

.vivo-hero-grid {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.vivo-hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
}

.vivo-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(47,217,217,0.4);
}

.vivo-hero-logo {
  height: 96px;
  width: auto;
  filter: drop-shadow(0 0 30px rgba(47,217,217,0.5));
  animation: vvPulse 4.5s ease-in-out infinite;
}
@keyframes vvPulse {
  0%,100% { filter: drop-shadow(0 0 22px rgba(47,217,217,0.4)); }
  50%     { filter: drop-shadow(0 0 40px rgba(110,240,240,0.7)); }
}

.vivo-hero-tagline {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1.18;
  color: var(--white);
  max-width: 18ch;
}
.vivo-hero-tagline .accent {
  background: linear-gradient(135deg, var(--cyan-bright), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.vivo-hero-sub {
  font-size: 0.97rem;
  color: var(--text);
  max-width: 46ch;
  line-height: 1.7;
}

.vivo-hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}

.vivo-hero-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 50px rgba(47,217,217,0.15);
}
.vivo-hero-visual img { width: 100%; display: block; }

/* ==============================
   SECTIONS — SHARED
   ============================== */
section { padding: 5.5rem 1.5rem; position: relative; }

.section-container { max-width: var(--max-w); margin: 0 auto; }

.section-title {
  font-family: var(--font-title);
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  font-weight: 700;
  color: var(--white);
  display: inline-block;
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  height: 2px;
  margin-top: 8px;
  width: 100%;
  background: linear-gradient(to right, var(--cyan-bright), transparent);
  border-radius: 1px;
  box-shadow: 0 0 8px rgba(47,217,217,0.5);
}

.section-subtitle {
  color: var(--muted);
  font-size: 0.94rem;
  margin-top: 1rem;
  margin-bottom: 2.6rem;
  max-width: 60ch;
}

.divider-glow {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-hover), transparent);
}

.fade-in {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Prose blocks */
.vv-prose { max-width: 760px; }
.vv-prose p {
  font-size: 0.96rem;
  color: var(--text);
  line-height: 1.85;
  margin-bottom: 1.1rem;
}
.vv-prose p:last-child { margin-bottom: 0; }
.vv-prose strong { color: var(--cyan-bright); font-weight: 600; }

/* ==============================
   OVERVIEW
   ============================== */
#overview { padding-top: 4rem; padding-bottom: 4rem; }

/* ==============================
   DEMOS — SoundCloud
   ============================== */
.soundcloud-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-2);
  box-shadow: 0 0 30px rgba(47,217,217,0.08);
}
.soundcloud-wrap iframe { display: block; }
.soundcloud-credit {
  padding: 0.7rem 1rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--muted);
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.soundcloud-credit a {
  color: var(--cyan);
  transition: text-shadow var(--t);
}
.soundcloud-credit a:hover { text-shadow: 0 0 8px rgba(47,217,217,0.6); }

/* ==============================
   USE-CASE CARDS
   ============================== */
.vv-uses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.2rem;
}

.feature-card {
  background: linear-gradient(160deg, var(--panel) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem 1.5rem;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.feature-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 24px rgba(47,217,217,0.1);
  transform: translateY(-3px);
}
.feature-icon {
  font-size: 1.6rem;
  color: var(--cyan);
  margin-bottom: 0.85rem;
  line-height: 1;
  text-shadow: 0 0 14px rgba(47,217,217,0.5);
}
.feature-card h3 {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.6rem;
}
.feature-card p {
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.68;
}

/* ==============================
   TWO ENGINES — plugin-panel look
   ============================== */
.engine-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.engine-card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(76,224,224,0.04), transparent 22%),
    linear-gradient(160deg, var(--panel-2) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  transition: border-color var(--t), box-shadow var(--t);
}
.engine-card::before {
  content: '';
  position: absolute;
  top: 0; left: 1.8rem; right: 1.8rem;
  height: 2px;
  background: linear-gradient(to right, var(--cyan), transparent);
  box-shadow: 0 0 10px rgba(47,217,217,0.5);
}
.engine-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 26px rgba(47,217,217,0.09);
}
.engine-card h3 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan-bright);
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}
.engine-card p {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.78;
  margin-bottom: 0.95rem;
}
.engine-card .greatfor {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 1.3rem 0 0.75rem;
}

/* Interface showcase */
.vv-interface-wrap {
  margin-top: 2.6rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 50px rgba(0,0,0,0.45), 0 0 44px rgba(47,217,217,0.12);
}
.vv-interface-wrap img { width: 100%; display: block; }

/* ==============================
   PILL TAG LISTS
   ============================== */
.vv-pills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.vv-pills li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  padding: 0.36rem 0.85rem;
  border: 1px solid var(--border-hover);
  border-radius: 20px;
  background: rgba(47,217,217,0.05);
  transition: background var(--t), box-shadow var(--t);
}
.vv-pills li:hover { background: rgba(47,217,217,0.12); box-shadow: 0 0 12px rgba(47,217,217,0.2); }

/* ==============================
   CHECKLIST
   ============================== */
.vv-checklist {
  list-style: none;
  columns: 2;
  column-gap: 2.5rem;
  margin-top: 1rem;
}
.vv-checklist li {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
  padding: 0.42rem 0 0.42rem 1.7rem;
  position: relative;
  break-inside: avoid;
}
.vv-checklist li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(47,217,217,0.7);
}

.vv-block + .vv-block { margin-top: 3rem; }

/* ==============================
   SPEC / FORMAT CARDS
   ============================== */
.req-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.req-card {
  background: linear-gradient(160deg, var(--panel) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  transition: border-color var(--t), box-shadow var(--t);
}
.req-card:hover { border-color: var(--border-hover); box-shadow: 0 0 20px rgba(47,217,217,0.08); }
.req-card h3 {
  font-family: var(--font-title);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--cyan-bright);
  margin-bottom: 0.95rem;
}
.req-card ul { list-style: none; display: flex; flex-direction: column; gap: 0.45rem; }
.req-card li {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--muted);
  padding-left: 1rem;
  position: relative;
}
.req-card li::before { content: '·'; position: absolute; left: 0; color: var(--cyan); }

/* ==============================
   DOWNLOAD CARDS
   ============================== */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-bottom: 2rem;
}
.dl-card {
  background: linear-gradient(160deg, var(--panel-2) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.dl-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 24px rgba(47,217,217,0.1);
  transform: translateY(-3px);
}
.dl-os-icon { width: 30px; height: 30px; color: var(--cyan); filter: drop-shadow(0 0 8px rgba(47,217,217,0.4)); }
.dl-os-icon svg { width: 100%; height: 100%; }
.dl-card h3 {
  font-family: var(--font-title);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--white);
}
.dl-specs { list-style: none; display: flex; flex-direction: column; gap: 0.32rem; flex: 1; }
.dl-specs li {
  font-size: 0.77rem;
  font-family: var(--font-mono);
  color: var(--muted);
  padding-left: 1rem;
  position: relative;
}
.dl-specs li::before { content: '—'; position: absolute; left: 0; color: var(--cyan); opacity: 0.6; }

.btn-download {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.72rem 1rem;
  background: rgba(47,217,217,0.07);
  border: 1px solid var(--border-hover);
  border-radius: 9px;
  color: var(--cyan);
  text-align: center;
  font-family: var(--font-mono);
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}
.btn-download:hover {
  background: rgba(47,217,217,0.14);
  border-color: var(--cyan);
  box-shadow: 0 0 16px rgba(47,217,217,0.28);
}
.btn-download span:first-child {
  font-size: 0.73rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--cyan-bright);
}
.dl-filename { font-size: 0.62rem; color: var(--muted); opacity: 0.75; }

/* Manuals */
.manuals-row { display: flex; align-items: center; gap: 0.85rem; flex-wrap: wrap; }
.manuals-label {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.btn-manual {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.44rem 1rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  transition: border-color var(--t), color var(--t), box-shadow var(--t);
}
.btn-manual svg { width: 13px; height: 13px; flex-shrink: 0; }
.btn-manual:hover { border-color: var(--border-hover); color: var(--cyan-bright); box-shadow: 0 0 12px rgba(47,217,217,0.15); }

.dl-note {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
  border-left: 2px solid var(--cyan-deep);
  padding-left: 1rem;
}
.dl-note strong { color: var(--cyan-bright); font-weight: 600; }

/* ==============================
   SUMMARY — highlighted band
   ============================== */
#summary .section-container {
  background: linear-gradient(160deg, var(--panel) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.6rem 2.4rem;
  box-shadow: 0 0 40px rgba(47,217,217,0.06);
}

/* ==============================
   FOOTER
   ============================== */
.vivo-footer {
  border-top: 1px solid var(--border);
  padding: 3.5rem 1.5rem;
  background: linear-gradient(180deg, transparent, rgba(47,217,217,0.03));
}
.footer-container {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.3rem;
  text-align: center;
}
.vivo-footer-logo {
  height: 52px;
  opacity: 0.95;
  filter: drop-shadow(0 0 16px rgba(47,217,217,0.45));
}
.vivo-footer-buy { display: flex; flex-direction: column; align-items: center; gap: 0.85rem; }
.vivo-footer-buy p {
  font-family: var(--font-title);
  font-size: 1.05rem;
  color: var(--white);
}
.footer-back {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  transition: color var(--t);
}
.footer-back:hover { color: var(--cyan-bright); }
.footer-copy {
  font-size: 0.73rem;
  font-family: var(--font-mono);
  color: var(--muted);
}
.footer-copy a { color: var(--cyan); transition: text-shadow var(--t); }
.footer-copy a:hover { text-shadow: 0 0 8px rgba(47,217,217,0.55); }

/* ==============================
   RESPONSIVE
   ============================== */
@media (max-width: 920px) {
  .vivo-hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .vivo-hero-visual { order: -1; max-width: 460px; }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .dl-grid  { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  #vivo-hero { padding-top: calc(var(--nav-h) + 2rem); text-align: left; }
  .vivo-hero-logo { height: 70px; }
  .engine-grid { grid-template-columns: 1fr; }
  .vv-checklist { columns: 1; }
  .req-grid { grid-template-columns: 1fr; }
  .dl-grid  { grid-template-columns: 1fr; }
  .vivo-hero-ctas { width: 100%; }
  .vivo-hero-ctas a { flex: 1; text-align: center; }
}
@media (max-width: 420px) {
  .section-title { font-size: 1.25rem; }
}