/* ============================================================
   Light Stick Concert — GFLAI
   Static CSS Design System (Performance Optimized)
   ============================================================ */

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

body {
  font-family: 'Inter', sans-serif;
  background: #000;
  color: #fff;
  scroll-behavior: smooth;
  overflow-x: hidden;
  line-height: 1.9;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
}

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

a {
  color: inherit;
}

/* ---------- Design Tokens ---------- */
:root {
  --bg: #000;
  --bg2: #0a0a0a;
  --bg3: #111;
  --bg4: #141414;
  --t1: #fff;
  --t2: #a0a0a0;
  --t3: #666;
  --id: #6366f1;
  --cy: #06b6d4;
  --am: #f59e0b;
  --b1: #1e1e1e;
  --b2: #2a2a2a;
  --rs: 6px;
  --rm: 10px;
  --rl: 16px;
}

/* ---------- Navigation ---------- */
.n-bg {
  background: rgba(10,10,10,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 60px;
  padding: 0.6rem 2rem;
}

nav {
  position: fixed;
  top: 6px;
  left: 6px;
  right: 6px;
  z-index: 100;
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
}

.n-in {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.n-l {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.n-l img {
  height: 32px;
  width: auto;
}

.n-l span {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: rgba(255,255,255,0.7);
}

.n-l span strong {
  color: rgba(255,255,255,0.9);
}

.n-lk {
  display: flex;
  gap: 28px;
  list-style: none;
}

.n-lk a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-weight: 500;
  transition: color 0.2s ease;
}

.n-lk a:hover {
  color: var(--am);
}

.mt {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
}

.mt span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: #fff;
  border-radius: 2px;
}

/* ---------- Hero ---------- */
.hr {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 140px 24px 80px;
  overflow: hidden;
}

.hr-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hr-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hr-ov {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.92) 30%, rgba(0,0,0,0.6) 60%, rgba(0,0,0,0.85) 100%);
  z-index: 1;
}

.hr-gl {
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.hr-gl.a { top: 15%; right: 10%; }
.hr-gl.b { bottom: 5%; left: 5%; }

.hr-c {
  position: relative;
  z-index: 2;
  max-width: 860px;
  text-align: center;
}

.hr-b {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.2);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  color: var(--am);
  margin-bottom: 28px;
  letter-spacing: 0.3px;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
}

.hr h1 {
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hr h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--am), var(--cy));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hr-p {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--t2);
  line-height: 1.9;
  max-width: 680px;
  margin: 0 auto 36px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: var(--rs);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: 'Space Grotesk', sans-serif;
  border: none;
  cursor: pointer;
}

.bp {
  background: var(--id);
  color: #fff;
}

.bp:hover {
  background: #4f46e5;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(99,102,241,0.25);
}

.bs {
  background: transparent;
  color: var(--t1);
  border: 1px solid var(--b2);
}

.bs:hover {
  border-color: var(--am);
  color: var(--am);
}

.hr-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Breadcrumb ---------- */
.bc-w {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px;
}

.bc {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--t3);
  list-style: none;
  flex-wrap: wrap;
}

.bc li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bc a {
  color: var(--t3);
  text-decoration: none;
  transition: color 0.2s ease;
}

.bc a:hover {
  color: var(--cy);
}

.bc .sp {
  color: var(--b1);
}

.bc .cu {
  color: var(--t2);
}

/* ---------- Section ---------- */
.sec {
  padding: 100px 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.sh {
  max-width: 720px;
  margin-bottom: 60px;
}

.st {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--am);
  margin-bottom: 16px;
  font-family: 'Space Grotesk', sans-serif;
}

.sec h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}

.sec h2 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--am), var(--cy));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sl {
  font-size: 18px;
  color: var(--t2);
  line-height: 1.9;
}

/* ---------- Key Numbers Strip ---------- */
.kn {
  background: var(--bg2);
  border-top: 1px solid var(--b1);
  border-bottom: 1px solid var(--b1);
  padding: 48px 24px;
}

.kn-in {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.kn-n {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 32px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--am), var(--cy));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.kn-l {
  font-size: 11px;
  color: var(--t3);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ---------- Feature Row (3-wide) ---------- */
.fw {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.fc {
  background: var(--bg4);
  border: 1px solid var(--b1);
  border-radius: var(--rm);
  padding: 28px;
  transition: all 0.3s ease;
}

.fc:hover {
  border-color: rgba(245,158,11,0.2);
  transform: translateY(-2px);
}

.fc .n {
  font-size: 13px;
  color: var(--am);
  font-weight: 600;
  margin-bottom: 10px;
  font-family: 'Space Grotesk', sans-serif;
}

.fc h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}

.fc p {
  font-size: 14px;
  color: var(--t2);
  line-height: 1.8;
  text-transform: none;
}

/* ---------- 2x2 Product Grid ---------- */
.pg {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.pc {
  background: var(--bg4);
  border: 1px solid var(--b1);
  border-radius: var(--rm);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.pc:hover {
  border-color: rgba(245,158,11,0.2);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(245,158,11,0.06);
}

.pc img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.pi {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.pi h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}

.pi p {
  font-size: 14px;
  color: var(--t3);
  line-height: 1.7;
  margin-bottom: 14px;
  text-transform: none;
  flex: 1;
}

.pi .pl {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--cy);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: 'Space Grotesk', sans-serif;
}

.pi .pl:hover {
  color: var(--cy);
}

.pi .pn {
  display: block;
  font-size: 11px;
  color: var(--t3);
  margin-top: 4px;
}

/* ---------- Two-Column Tech Section ---------- */
.tc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-top: 48px;
}

.tc-img {
  border-radius: var(--rm);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg3);
}

.tc-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tc-txt h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.tc-txt p {
  font-size: 16px;
  color: var(--t2);
  line-height: 1.9;
  margin-bottom: 14px;
  text-transform: none;
}

.tc-txt .ca {
  display: block;
  padding: 12px 16px;
  background: rgba(99,102,241,0.05);
  border-left: 2px solid var(--id);
  border-radius: 0 var(--rs) var(--rs) 0;
  font-size: 14px;
  color: var(--t3);
  margin-top: 14px;
}

/* ---------- Process Steps ---------- */
.ps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.pt {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg4);
  border: 1px solid var(--b1);
  border-radius: var(--rm);
}

.pt .pn {
  font-size: 28px;
  margin-bottom: 10px;
}

.pt h3 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}

.pt p {
  font-size: 13px;
  color: var(--t3);
  line-height: 1.7;
}

/* ---------- Gallery ---------- */
.gl {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.gi {
  position: relative;
  border-radius: var(--rm);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg3);
}

.gi img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.gc {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px 20px 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}

.gc p {
  font-size: 14px;
  font-weight: 500;
  color: var(--t1);
  text-transform: none;
  font-family: 'Inter', sans-serif;
}

.gc span {
  display: block;
  font-size: 13px;
  color: var(--t3);
  margin-top: 2px;
}

/* ---------- FAQ ---------- */
.fq {
  max-width: 800px;
}

.fi {
  border-bottom: 1px solid var(--b1);
  padding: 20px 0;
}

.fq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  color: var(--t1);
  font-size: 17px;
  font-weight: 500;
  cursor: pointer;
  padding: 4px 0;
  text-align: left;
  gap: 16px;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: none;
}

.fq-q::after {
  content: "+";
  font-size: 20px;
  color: var(--t3);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.fi.open .fq-q::after {
  transform: rotate(45deg);
}

.fa {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 32px 0 0;
}

.fi.open .fa {
  max-height: 600px;
  padding-top: 16px;
}

.fa p {
  font-size: 16px;
  color: var(--t2);
  line-height: 1.9;
}

/* ---------- Form ---------- */
.sc {
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.04);
}

.bg {
  border: 1px solid rgba(99,102,241,0.15);
  transition: border-color 0.4s ease;
}

.bg:hover {
  border-color: rgba(99,102,241,0.4);
}

.tg {
  background: linear-gradient(135deg, #a5b4fc, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hs .hs-f {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.hs label {
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hs input,
.hs textarea,
.hs select {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 0.9rem 1.2rem;
  color: #f1f5f9;
  font-size: 0.95rem;
  width: 100% !important;
  outline: none;
  transition: border 0.25s ease;
}

.hs input:focus,
.hs textarea:focus,
.hs select:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.hs .hs-button {
  background: #6366f1;
  border: none;
  border-radius: 40px;
  padding: 1rem 2.4rem;
  font-weight: 600;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  width: auto;
  align-self: flex-start;
}

.hs .hs-button:hover {
  background: #4f46e5;
  box-shadow: 0 0 40px rgba(99,102,241,0.25);
  transform: scale(1.02);
}

.fs {
  padding: 100px 24px;
  position: relative;
}

.fs::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(99,102,241,0.06), transparent);
  pointer-events: none;
}

.fw2 {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.fh {
  text-align: center;
  margin-bottom: 48px;
}

.fh h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  margin-bottom: 16px;
}

.fh p {
  color: var(--t2);
  font-size: 17px;
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- HubSpot Form Override ---------- */
#hubspot-form-container .hs-form input,
#hubspot-form-container .hs-form textarea,
#hubspot-form-container .hs-form select {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 0.9rem 1.2rem;
  color: #f1f5f9;
  font-size: 0.95rem;
  width: 100% !important;
  outline: none;
  transition: border 0.25s ease;
}

#hubspot-form-container .hs-form input:focus,
#hubspot-form-container .hs-form textarea:focus,
#hubspot-form-container .hs-form select:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

#hubspot-form-container .hs-form .hs-button {
  background: #6366f1;
  border: none;
  border-radius: 40px;
  padding: 1rem 2.4rem;
  font-weight: 600;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  width: auto;
  align-self: flex-start;
}

#hubspot-form-container .hs-form .hs-button:hover {
  background: #4f46e5;
  box-shadow: 0 0 40px rgba(99,102,241,0.25);
  transform: scale(1.02);
}

#hubspot-form-container .hs-form label {
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

#hubspot-form-container .hs-form .hs-error-msgs {
  color: #f87171;
  font-size: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 0.25rem 0 0 0;
}

#hubspot-form-container .hs-form .legal-consent-container {
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.5;
}

/* ---------- Footer ---------- */
.ft {
  border-top: 1px solid rgba(255,255,255,0.05);
  background: #000;
}

.ft-in {
  max-width: 1280px;
  margin: 0 auto;
  padding: 96px 24px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  text-align: left;
}

.ft h5 {
  color: #fff;
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-size: 11px;
}

.ft p {
  text-transform: none;
  font-family: 'Inter', sans-serif;
}

.fa p {
  color: var(--t3);
  font-size: 15px;
  line-height: 1.8;
  font-weight: 300;
}

.fc2 {
  text-align: left;
}

.fc2 p {
  color: var(--t2);
  font-size: 15px;
  margin-bottom: 16px;
}

.fc2 a {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: color 0.2s ease;
}

.fc2 a:hover {
  color: var(--id);
}

.fc2 .l {
  color: var(--t3);
  font-weight: 400;
  margin-right: 8px;
}

.fb {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 48px 24px;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8em;
  color: rgba(255,255,255,0.04);
}

/* ---------- WhatsApp Float ---------- */
.wa {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.3);
  transition: all 0.3s ease;
  text-decoration: none;
}

.wa:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(37,211,102,0.4);
}

.wa svg {
  width: 28px;
  height: 28px;
  fill: #fff;
}

/* ---------- Responsive (Tablet max 1024px) ---------- */
@media (max-width: 1024px) {
  .fw { grid-template-columns: repeat(2, 1fr); }
  .kn-in { grid-template-columns: repeat(2, 1fr); }
  .ps { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Responsive (Mobile max 768px) ---------- */
@media (max-width: 768px) {
  .n-lk { display: none; }
  .mt { display: flex; }
  .n-lk.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    align-items: center;
    border-radius: 20px;
    border: 1px solid var(--b1);
  }
  .n-bg { border-radius: 40px; padding: 0.5rem 1.2rem; }
  .hr { min-height: 90vh; padding: 120px 20px 60px; }
  .fw { grid-template-columns: 1fr; }
  .tc { grid-template-columns: 1fr; gap: 24px; }
  .pg { grid-template-columns: 1fr; }
  .ps { grid-template-columns: 1fr 1fr; gap: 12px; }
  .gl { grid-template-columns: 1fr; }
  .sec { padding: 60px 20px; }
  .fs { padding: 60px 20px; }
  .ft-in { grid-template-columns: 1fr; gap: 40px; }
  .fb { margin-top: 48px; padding: 32px 20px; }
}

/* ---------- Responsive (Small Mobile max 480px) ---------- */
@media (max-width: 480px) {
  .pg { grid-template-columns: 1fr; }
  .ps { grid-template-columns: 1fr; }
  .hr h1 { font-size: 26px; }
  .hr-cta { flex-direction: column; }
  .hr-cta .btn { width: 100%; justify-content: center; }
}