:root {
  --green: #2a6b2a;
  --green-bright: #3a8c3a;
  --green-label: #4caf50;
  --white: #ffffff;
  --gray: rgba(255,255,255,0.55);
  --dark: #0a0a0a;
  --card-bg: rgba(255,255,255,0.03);
  --card-border: rgba(255,255,255,0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Barlow', sans-serif;
  background: var(--dark);
  color: var(--white);
  overflow-x: hidden;
  line-height: 1.5;
}

/* ─────────── NAV ─────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  height: 60px;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-logo svg {
  width: 14px; height: 14px;
  fill: var(--white);
}

.lang-selector {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  color: var(--white);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  font-family: 'Barlow', sans-serif;
  transition: background 0.2s;
}

.lang-selector:hover {
  background: rgba(255,255,255,0.1);
}

.lang-selector option {
  background: var(--dark);
  color: var(--white);
}

/* ─────────── LAYOUT & HERO ─────────── */
.header-hero {
  padding-top: 130px;
  padding-bottom: 50px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.header-hero h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 1.05;
  margin-bottom: 12px;
}

.header-hero p {
  font-size: 15px;
  color: var(--gray);
  font-weight: 400;
}

/* ─────────── CONTAINER ─────────── */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 40px 100px;
}

/* ─────────── GLASS CARD ─────────── */
.premium-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 40px;
  backdrop-filter: blur(16px);
  margin-bottom: 50px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

.card-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--green-label);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.card-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 8px;
  line-height: 1.1;
}

.card-subtitle {
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 16px;
}

.card-desc {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 30px;
}

/* ─────────── VIDEO PLAYER ─────────── */
.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 36px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ─────────── STEPS GRID ─────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.step-card {
  background: rgba(255,255,255,0.015);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}

.step-card:hover {
  transform: translateY(-2px);
  border-color: rgba(76,175,80,0.25);
  background: rgba(255,255,255,0.025);
}

.step-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green-label);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.step-text {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.6;
}

/* ─────────── DOWNLOAD GRID ─────────── */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.download-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.download-card:hover {
  transform: translateY(-3px);
  border-color: rgba(76,175,80,0.35);
  background: rgba(76,175,80,0.02);
}

.download-card-left {
  display: flex;
  align-items: center;
  gap: 16px;
  overflow: hidden;
}

.download-icon {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.04);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  color: var(--green-label);
}

.download-meta {
  overflow: hidden;
}

.download-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  margin-bottom: 2px;
}

.download-size {
  font-size: 11px;
  color: var(--gray);
}

.download-btn {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--green);
  color: var(--white);
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}

.download-btn:hover {
  background: var(--green-bright);
}

.download-btn:active {
  transform: scale(0.95);
}

/* ─────────── FOOTER ─────────── */
footer {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 40px 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

/* ─────────── RESPONSIVE ─────────── */
@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .header-hero { padding-top: 100px; padding-left: 20px; padding-right: 20px; }
  .container { padding: 0 20px 60px; }
  .premium-card { padding: 24px; }
  .steps-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  footer { padding: 30px 20px; }
}