/* ═══════════════════════════════════════════════════════════════════════════
   PropulsoIQ — Welcome / Landing Page
   Dark theme matching app: #0f1117 bg, #22c1a6 teal, #7c83fd purple accent
   ═══════════════════════════════════════════════════════════════════════════ */

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

:root {
  --w-bg:       #0b1628;
  --w-surface:  #111e33;
  --w-border:   rgba(0,196,178,0.15);
  --w-text:     #ffffff;
  --w-text-dim: #94a3b8;
  --w-teal:     #00c4b2;
  --w-purple:   #00c4b2;
  --w-blue:     #38bdf8;
  --w-amber:    #f59e0b;
  --w-font:     'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body.welcome-body {
  min-height: 100vh;
  background: var(--w-bg);
  color: var(--w-text);
  font-family: var(--w-font);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Ambient Background ──────────────────────────────────────────────────── */
.welcome-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
.welcome-bg__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(124,131,253,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,131,253,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.welcome-bg__glow {
  position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.15;
}
.welcome-bg__glow--1 {
  width: 600px; height: 600px; top: -150px; right: -100px;
  background: var(--w-teal);
}
.welcome-bg__glow--2 {
  width: 500px; height: 500px; bottom: 10%; left: -100px;
  background: var(--w-purple);
}

/* ── Navigation ──────────────────────────────────────────────────────────── */
.welcome-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--w-border);
}
.welcome-nav__brand {
  display: flex; align-items: center; gap: 0.5rem;
}
.welcome-nav__logo {
  height: 38px; width: auto;
}
.welcome-nav__links {
  display: flex; align-items: center; gap: 1.2rem;
}
.welcome-nav__link {
  color: var(--w-text-dim); text-decoration: none; font-size: 0.88rem;
  font-weight: 500; transition: color 0.2s;
}
.welcome-nav__link:hover { color: var(--w-text); }

.welcome-nav__btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1.2rem; border-radius: 8px;
  font-size: 0.88rem; font-weight: 600;
  text-decoration: none; transition: all 0.2s;
}
.welcome-nav__btn--ghost {
  color: var(--w-text-dim); border: 1px solid rgba(136,144,176,0.25);
  background: transparent;
}
.welcome-nav__btn--ghost:hover {
  color: var(--w-text); border-color: rgba(136,144,176,0.5);
}
.welcome-nav__btn--primary {
  color: #fff; background: linear-gradient(135deg, var(--w-teal), #128b74);
  border: none;
}
.welcome-nav__btn--primary:hover { filter: brightness(1.1); }

/* ── Hero Section ────────────────────────────────────────────────────────── */
.hero {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 100vh; padding: 7rem 2rem 4rem; text-align: center;
}
.hero__content { max-width: 720px; }

.hero__badge {
  display: inline-block;
  padding: 0.35rem 1rem; margin-bottom: 1.5rem;
  border-radius: 20px;
  background: rgba(34,193,166,0.1);
  border: 1px solid rgba(34,193,166,0.25);
  color: var(--w-teal); font-size: 0.82rem; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800; line-height: 1.12;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}
.hero__accent {
  background: linear-gradient(135deg, var(--w-teal), var(--w-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--w-text-dim); max-width: 560px; margin: 0 auto 2.2rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
}

.btn-hero {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.8rem; border-radius: 10px;
  font-size: 0.95rem; font-weight: 700;
  text-decoration: none; transition: all 0.25s;
  cursor: pointer;
}
.btn-hero--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--w-teal), #128b74);
  box-shadow: 0 4px 20px rgba(34,193,166,0.3);
}
.btn-hero--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(34,193,166,0.4);
}
.btn-hero--outline {
  color: var(--w-text);
  border: 1.5px solid rgba(224,230,255,0.2);
  background: rgba(255,255,255,0.03);
}
.btn-hero--outline:hover {
  border-color: rgba(224,230,255,0.4);
  background: rgba(255,255,255,0.06);
}

/* Hero stats strip */
.hero__stats {
  display: flex; align-items: center; gap: 2rem;
  margin-top: 4rem; padding: 1.2rem 2.5rem;
  border-radius: 14px;
  background: rgba(22,26,36,0.7);
  border: 1px solid var(--w-border);
  backdrop-filter: blur(8px);
}
.hero__stat { text-align: center; }
.hero__stat-value {
  display: block; font-size: 1.5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--w-teal), var(--w-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__stat-label {
  display: block; font-size: 0.75rem; color: var(--w-text-dim);
  margin-top: 0.2rem; text-transform: uppercase; letter-spacing: 0.06em;
}
.hero__stat-sep {
  width: 1px; height: 32px;
  background: rgba(136,144,176,0.2);
}

/* ── Features Section ────────────────────────────────────────────────────── */
.features {
  position: relative; z-index: 1;
  padding: 5rem 2rem;
  max-width: 1100px; margin: 0 auto;
}
.features__header { text-align: center; margin-bottom: 3rem; }
.features__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800;
  margin-bottom: 0.6rem;
}
.features__subtitle {
  color: var(--w-text-dim); font-size: 1.05rem;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 1.8rem 1.6rem;
  border-radius: 14px;
  background: var(--w-surface);
  border: 1px solid var(--w-border);
  transition: border-color 0.3s, transform 0.3s;
}
.feature-card:hover {
  border-color: rgba(34,193,166,0.3);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px; margin-bottom: 1.2rem;
}
.feature-card__icon--teal   { background: rgba(34,193,166,0.12); color: var(--w-teal); }
.feature-card__icon--purple { background: rgba(124,131,253,0.12); color: var(--w-purple); }
.feature-card__icon--blue   { background: rgba(91,156,245,0.12); color: var(--w-blue); }
.feature-card__icon--amber  { background: rgba(245,166,35,0.12); color: var(--w-amber); }

.feature-card__title {
  font-size: 1.05rem; font-weight: 700; margin-bottom: 0.6rem;
}
.feature-card__desc {
  font-size: 0.88rem; color: var(--w-text-dim); line-height: 1.65;
  margin-bottom: 1rem;
}
.feature-card__tag {
  display: inline-block;
  padding: 0.2rem 0.7rem; border-radius: 6px;
  font-size: 0.72rem; font-weight: 600;
  background: rgba(34,193,166,0.08);
  color: var(--w-teal); text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── How It Works ────────────────────────────────────────────────────────── */
.how-it-works {
  position: relative; z-index: 1;
  padding: 4rem 2rem 5rem;
  max-width: 900px; margin: 0 auto;
}

.steps {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 1.5rem; margin-top: 3rem;
}
.step {
  flex: 1; text-align: center; max-width: 240px;
}
.step__number {
  width: 44px; height: 44px; margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px; font-size: 1.1rem; font-weight: 800;
  background: linear-gradient(135deg, var(--w-teal), #128b74);
  color: #fff;
}
.step__title {
  font-size: 0.95rem; font-weight: 700; margin-bottom: 0.5rem;
}
.step__desc {
  font-size: 0.84rem; color: var(--w-text-dim); line-height: 1.6;
}
.step__arrow {
  display: flex; align-items: center;
  padding-top: 0.8rem; color: var(--w-text-dim); opacity: 0.4;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.welcome-footer {
  position: relative; z-index: 1;
  padding: 2rem;
  border-top: 1px solid var(--w-border);
  text-align: center;
}
.welcome-footer__tagline {
  font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.16em; color: var(--w-text-dim);
  margin-bottom: 0.4rem;
}
.welcome-footer__copy {
  font-size: 0.75rem; color: rgba(136,144,176,0.5);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .welcome-nav { padding: 0.8rem 1.2rem; }
  .welcome-nav__link { display: none; }
  .hero { padding: 6rem 1.2rem 3rem; min-height: auto; }
  .hero__stats { flex-wrap: wrap; gap: 1rem; padding: 1rem; }
  .hero__stat-sep { display: none; }
  .features { padding: 3rem 1.2rem; }
  .steps { flex-direction: column; align-items: center; }
  .step__arrow { transform: rotate(90deg); padding: 0; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 1.8rem; }
  .hero__actions { flex-direction: column; }
  .btn-hero { width: 100%; justify-content: center; }
}