* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #040505;
  color: #f7f1e8;
  font-family: Arial, Helvetica, sans-serif;
  overflow-x: hidden;
}

/* LANGUAGE SWITCH CENTER */
.language-switch {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  gap: 8px;
  padding: 7px;
  border-radius: 999px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(18px);
}

.language-switch button {
  border: 0;
  border-radius: 999px;
  padding: 12px 22px;
  background: transparent;
  color: #aaa;
  font-weight: 900;
  cursor: pointer;
}

.language-switch button.active {
  background: #75ff00;
  color: #050505;
  box-shadow: 0 0 30px rgba(117,255,0,0.55);
}

/* HERO */
.hero {
  min-height: 92vh;
  padding: 150px 6vw 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(0, 255, 255, 0.24), transparent 34%),
    radial-gradient(circle at bottom right, rgba(255, 122, 0, 0.22), transparent 36%);
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  pointer-events: none;
}

.glow-a {
  width: 420px;
  height: 420px;
  top: -160px;
  left: -120px;
  background: rgba(0, 234, 255, 0.2);
}

.glow-b {
  width: 360px;
  height: 360px;
  right: -100px;
  bottom: -120px;
  background: rgba(117, 255, 0, 0.14);
}

.tag {
  display: inline-block;
  color: #00eaff;
  letter-spacing: 5px;
  font-size: 12px;
  font-weight: 900;
  margin-bottom: 22px;
}

.hero h1,
.download-section h2 {
  max-width: 980px;
  margin: 0 auto;
  font-size: clamp(54px, 8vw, 118px);
  line-height: 0.95;
  letter-spacing: -5px;
}

.hero-text {
  max-width: 850px;
  margin: 32px auto 0;
  color: #b8b0a6;
  font-size: 21px;
  line-height: 1.6;
  font-weight: 700;
}

.download-btn {
  display: inline-block;
  margin-top: 36px;
  padding: 18px 42px;
  border-radius: 999px;
  background: #75ff00;
  color: #050505;
  text-decoration: none;
  font-weight: 900;
  box-shadow: 0 0 35px rgba(117,255,0,0.35);
}

/* SECTIONS */
.section {
  padding: 90px 6vw;
}

.section-title {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 34px;
}

.section-title span {
  color: #ff7a00;
  font-size: 14px;
  font-weight: 900;
  padding-top: 9px;
}

.section-title h2,
.requirements h2,
.showcase-text h2 {
  font-size: clamp(34px, 5vw, 66px);
  line-height: 1;
  letter-spacing: -2.5px;
  max-width: 850px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.grid.four {
  grid-template-columns: repeat(4, 1fr);
}

/* FUTURISTIC CARDS */
.card,
.mini-card,
.benefits article,
.requirements li {
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  padding: 32px;
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow:
    inset 0 0 40px rgba(255,255,255,0.025),
    0 24px 70px rgba(0,0,0,0.36);
}


.card.green,
.benefits article:nth-child(1),
.mini-card:nth-child(1),
.requirements li:nth-child(1) {
  background: linear-gradient(135deg, rgba(117,255,0,0.16), rgba(255,255,255,0.035));
  border-color: rgba(117,255,0,0.34);
}

.card::before,
.mini-card::before,
.benefits article::before,
.requirements li::before {
  display: none !important;
}

.card.blue,
.benefits article:nth-child(2),
.mini-card:nth-child(2),
.requirements li:nth-child(2) {
  background: linear-gradient(135deg, rgba(0,234,255,0.16), rgba(255,255,255,0.035));
  border-color: rgba(0,234,255,0.34);
}

.card.blue::before,
.benefits article:nth-child(2)::before,
.mini-card:nth-child(2)::before,
.requirements li:nth-child(2)::before {
  background: #00eaff;
}

.card.orange,
.benefits article:nth-child(3),
.mini-card:nth-child(3),
.requirements li:nth-child(3) {
  background: linear-gradient(135deg, rgba(255,136,0,0.18), rgba(255,255,255,0.035));
  border-color: rgba(255,136,0,0.4);
}

.card.orange::before,
.benefits article:nth-child(3)::before,
.mini-card:nth-child(3)::before,
.requirements li:nth-child(3)::before {
  background: #ff8800;
}

.benefits article:nth-child(4),
.mini-card:nth-child(4),
.requirements li:nth-child(4) {
  background: linear-gradient(135deg, rgba(180,80,255,0.16), rgba(255,255,255,0.035));
  border-color: rgba(180,80,255,0.36);
}

.benefits article:nth-child(4)::before,
.mini-card:nth-child(4)::before,
.requirements li:nth-child(4)::before {
  background: #b450ff;
}

.benefits article:nth-child(5),
.requirements li:nth-child(5) {
  background: linear-gradient(135deg, rgba(255,60,60,0.14), rgba(255,255,255,0.035));
  border-color: rgba(255,60,60,0.34);
}

.benefits article:nth-child(5)::before,
.requirements li:nth-child(5)::before {
  background: #ff3c3c;
}

.benefits article:nth-child(6) {
  background: linear-gradient(135deg, rgba(255,210,70,0.16), rgba(255,255,255,0.035));
  border-color: rgba(255,210,70,0.34);
}

.benefits article:nth-child(6)::before {
  background: #ffd246;
}

.line {
  width: 54px;
  height: 4px;
  border-radius: 99px;
  margin-bottom: 24px;
}

.green .line { background: #75ff00; }
.blue .line { background: #20b9ff; }
.orange .line { background: #ff8800; }

.card h3 {
  font-size: 72px;
  letter-spacing: -4px;
  margin-bottom: 8px;
}

.green h3 { color: #75ff00; }
.blue h3 { color: #20b9ff; }
.orange h3 { color: #ff8800; }

.card h4,
.benefits strong,
.mini-card h3 {
  font-size: 23px;
  margin-bottom: 16px;
  color: #f7f1e8;
}

.mini-card h3 {
  color: #75ff00;
}

.card p,
.mini-card p,
.benefits p,
.requirements li,
.showcase-text p {
  color: #aaa299;
  line-height: 1.65;
  font-weight: 700;
}

/* CHART */
.showcase {
  min-height: 105vh;
  padding: 90px 6vw;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
  background:
    radial-gradient(circle at right, rgba(255,122,0,0.14), transparent 35%);
}

.chart-card {
  height: 560px;
  border-radius: 38px;
  background: linear-gradient(135deg, #0b1412, #111);
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow: 0 35px 100px rgba(0,0,0,0.65);
  overflow: hidden;
  position: relative;
}

.chart-top {
  height: 58px;
  background: rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 24px;
}

.chart-top span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
}

.chart-area {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 12%;
  height: 68%;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.09) 1px, transparent 1px);
  background-size: 70px 62px;
}

.line-chart {
  position: absolute;
  left: 4%;
  right: 4%;
  height: 6px;
  border-radius: 999px;
  transform-origin: left;
}

.bt-line {
  bottom: 42%;
  background: #75ff00;
  transform: rotate(-7deg);
  box-shadow: 0 0 18px rgba(117,255,0,0.5);
}

.et-line {
  bottom: 62%;
  background: #20b9ff;
  transform: rotate(-4deg);
  box-shadow: 0 0 18px rgba(32,185,255,0.45);
}

.ror-line {
  bottom: 30%;
  background: #ff8800;
  transform: rotate(13deg);
  box-shadow: 0 0 18px rgba(255,136,0,0.45);
}

.legend {
  position: absolute;
  left: 0;
  bottom: -52px;
  display: flex;
  gap: 18px;
  color: #d7d0c8;
  font-weight: 800;
}

.legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 7px;
}

.bt-dot { background: #75ff00; }
.et-dot { background: #20b9ff; }
.ror-dot { background: #ff8800; }

/* BENEFITS */
.dark-panel {
  background:
    radial-gradient(circle at top left, rgba(117,255,0,0.08), transparent 40%),
    rgba(255,255,255,0.02);
}

.benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.benefits article {
  min-height: 190px;
}

.benefits strong {
  display: block;
  font-weight: 900;
}

/* REQUIREMENTS */
.requirements {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
  background:
    radial-gradient(circle at right, rgba(255,122,0,0.13), transparent 35%);
}

.requirements ul {
  list-style: none;
  display: grid;
  gap: 14px;
}

/* DOWNLOAD */
.download-section {
  padding: 110px 6vw 120px;
  text-align: center;
}

footer {
  padding: 55px 20px;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-author {
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
}

.footer-copy {
  color: #777;
  font-size: 14px;
}

@media (max-width: 950px) {
  .language-switch {
    top: 14px;
  }

  .hero {
    padding-top: 120px;
  }

  .hero h1,
  .download-section h2 {
    letter-spacing: -2px;
  }

  .grid.three,
  .grid.four,
  .benefits,
  .requirements,
  .showcase {
    grid-template-columns: 1fr;
  }

  .chart-card {
    height: 430px;
  }

  .section-title {
    flex-direction: column;
    gap: 8px;
  }
}