/* ════════════════════════════════════════════════════════════
   SENTINEL AI — Landing Page
   ════════════════════════════════════════════════════════════ */

:root {
  --accent:      #6366f1;
  --accent-rgb:  99, 102, 241;
  --accent-l:    #818cf8;
  --glow:        rgba(99, 102, 241, 0.45);
  --bg:          #07071a;
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: #f1f5f9;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── Hidden SVG filter container ───────────────────────── */
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ══════════════════════════════════════════════════════════
   BACKGROUND CANVAS
   ══════════════════════════════════════════════════════════ */
.bg-canvas {
  position: fixed; inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Ambient light blobs */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0;
  animation: blobAppear 2s ease 0.5s forwards,
             blobFloat  12s ease-in-out 2.5s infinite;
}
.blob-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(99,102,241,0.35), transparent 70%);
  top: -280px; left: -180px;
  animation-delay: 0.4s, 2.5s;
}
.blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(67,56,202,0.25), transparent 70%);
  bottom: -160px; right: -100px;
  animation-delay: 0.8s, 2.5s;
}
.blob-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(124,58,237,0.2), transparent 70%);
  top: 45%; left: 55%;
  transform: translate(-50%, -50%);
  animation-delay: 1.2s, 2.5s;
}
@keyframes blobAppear {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes blobFloat {
  0%,100% { transform: translate(0,   0)   scale(1);    }
  33%      { transform: translate(35px,-25px) scale(1.06); }
  66%      { transform: translate(-25px,18px) scale(0.96); }
}

/* Subtle scanline overlay */
.scanline {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.04) 2px,
    rgba(0,0,0,0.04) 4px
  );
  pointer-events: none;
}

/* ══════════════════════════════════════════════════════════
   STAGE
   ══════════════════════════════════════════════════════════ */
.stage {
  position: relative; z-index: 1;
  width: 100%; height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 40px 24px;
  overflow-y: auto;
}

/* ══════════════════════════════════════════════════════════
   HERO — SENTINEL AI
   ══════════════════════════════════════════════════════════ */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1),
              margin-bottom 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.hero.moved-up {
  transform: translateY(-60px);
  margin-bottom: 0;
}

/* Wrapper gives the backlight a positioning context */
.sentinel-wrap {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

/* ── Backlit panel ───────────────────────────────────────── */
.backlight {
  position: absolute;
  width: 115%;
  height: 180%;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse 80% 60% at 50% 50%,
    rgba(var(--accent-rgb), 0.55) 0%,
    rgba(var(--accent-rgb), 0.15) 45%,
    transparent 75%
  );
  filter: blur(28px);
  z-index: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1.4s ease;
}
.backlight.lit { opacity: 1; }

/* ── SENTINEL AI text ────────────────────────────────────── */
.sentinel-text {
  position: relative;
  z-index: 1;
  font-size: clamp(44px, 7.5vw, 92px);
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #ffffff;
  line-height: 1;
  opacity: 0;
  display: flex;
  align-items: baseline;
  gap: 0.22em;
  will-change: filter, opacity, letter-spacing;
}

/* ── Enter animation (fluid → crisp) ───────────────────── */
.sentinel-text.entering {
  animation: sentinelEnter 2.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes sentinelEnter {
  0%   {
    opacity: 0;
    letter-spacing: 0.55em;
    filter: url(#fluid) blur(3px);
  }
  25%  { opacity: 0.55; }
  70%  {
    opacity: 0.95;
    letter-spacing: 0.22em;
    filter: blur(0.6px);
  }
  100% {
    opacity: 1;
    letter-spacing: 0.18em;
    filter: none;
  }
}

/* ── Sellvio logo image ──────────────────────────────────── */
img.sellvio-logo-img {
  width: clamp(200px, 32vw, 420px);
  height: auto;
  display: block;
  font-size: unset;
  letter-spacing: unset;
  text-transform: unset;
  filter: drop-shadow(0 0 32px rgba(var(--accent-rgb), 0.45));
}
img.sellvio-logo-img.lit {
  filter: drop-shadow(0 0 12px rgba(255,255,255,0.5))
          drop-shadow(0 0 40px rgba(var(--accent-rgb), 0.5));
}
img.sellvio-logo-img.entering {
  animation: logoEnter 1.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes logoEnter {
  0%   { opacity: 0; transform: scale(0.92) translateY(6px); }
  40%  { opacity: 0.65; }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* ── Ground reflection ───────────────────────────────────── */
.ground-glow {
  width: 80%;
  height: 28px;
  margin-top: 4px;
  background: radial-gradient(ellipse 70% 100% at 50% 0%,
    rgba(var(--accent-rgb), 0.35),
    transparent 80%
  );
  filter: blur(12px);
  opacity: 0;
  transition: opacity 1s ease;
  pointer-events: none;
}
.ground-glow.lit { opacity: 1; }

/* ── Tagline ─────────────────────────────────────────────── */
.tagline {
  font-size: clamp(11px, 1.4vw, 14px);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.75);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.tagline.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════════════════════
   NAVIGATION CARDS  —  3-column grid
   ══════════════════════════════════════════════════════════ */
.nav-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(190px, 260px));
  gap: 14px;
  justify-content: center;
  margin-top: 36px;
  padding-top: 14px; /* room for the Coming Soon badge overflow */
}
@media (max-width: 780px) {
  .nav-cards { grid-template-columns: repeat(2, minmax(190px, 260px)); }
}
@media (max-width: 480px) {
  .nav-cards { grid-template-columns: minmax(240px, 320px); }
}

/* ── Base card ───────────────────────────────────────────── */
.nav-card {
  /* per-card accent (overridden by variant classes) */
  --card-accent:     #6366f1;
  --card-accent-rgb: 99, 102, 241;

  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px 18px 18px;
  background: rgba(14, 14, 36, 0.65);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid rgba(var(--card-accent-rgb), 0.22);
  border-radius: 16px;
  cursor: pointer;
  text-align: left;
  color: #f1f5f9;
  overflow: visible; /* allow Coming Soon badge to overflow top */
  box-shadow: 0 8px 36px rgba(0,0,0,0.4),
              inset 0 1px 0 rgba(255,255,255,0.07);
  /* Hidden until JS adds class */
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s cubic-bezier(0.22,1,0.36,1),
              transform 0.55s cubic-bezier(0.22,1,0.36,1),
              border-color 0.2s,
              box-shadow 0.2s;
}
.nav-card.card-visible {
  opacity: 1;
  transform: translateY(0);
}
.nav-card:not(.nav-card--locked):hover {
  border-color: rgba(var(--card-accent-rgb), 0.6);
  box-shadow: 0 0 40px rgba(var(--card-accent-rgb), 0.18),
              0 14px 44px rgba(0,0,0,0.45),
              inset 0 1px 0 rgba(255,255,255,0.12);
  transform: translateY(-4px);
}
.nav-card:not(.nav-card--locked):active { transform: translateY(-1px); }

/* Hover glow layer */
.nav-card-glow {
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(ellipse 80% 80% at 20% 50%,
    rgba(var(--card-accent-rgb), 0.08),
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.nav-card:not(.nav-card--locked):hover .nav-card-glow { opacity: 1; }

/* ── Card colour variants ────────────────────────────────── */
.nav-card--primary {
  --card-accent:     #818cf8;
  --card-accent-rgb: 129, 140, 248;
}
.nav-card--violet {
  --card-accent:     #a78bfa;
  --card-accent-rgb: 167, 139, 250;
}
.nav-card--emerald {
  --card-accent:     #34d399;
  --card-accent-rgb: 52, 211, 153;
}
.nav-card--cyan {
  --card-accent:     #22d3ee;
  --card-accent-rgb: 34, 211, 238;
}
.nav-card--rose {
  --card-accent:     #fb7185;
  --card-accent-rgb: 251, 113, 133;
}

/* ── Locked (coming soon) cards ──────────────────────────── */
.nav-card--locked {
  cursor: default;
  opacity: 0.68;
}
.nav-card--locked .nav-card-glow { display: none; }
.nav-card--locked .nav-card-arrow { display: none; }

/* ── Card inner elements ─────────────────────────────────── */
.nav-card-icon {
  width: 46px; height: 46px;
  border-radius: 11px;
  background: rgba(var(--card-accent-rgb), 0.12);
  border: 1px solid rgba(var(--card-accent-rgb), 0.25);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--card-accent);
  transition: background 0.2s, box-shadow 0.2s;
}
.nav-card:not(.nav-card--locked):hover .nav-card-icon {
  background: rgba(var(--card-accent-rgb), 0.2);
  box-shadow: 0 0 16px rgba(var(--card-accent-rgb), 0.3);
}

.nav-card-body { flex: 1; display: flex; flex-direction: column; gap: 3px; }
.nav-card-title {
  font-size: 14px; font-weight: 700; color: #f1f5f9; letter-spacing: 0.01em;
}
.nav-card-sub {
  font-size: 11px; color: rgba(148,163,184,0.7); letter-spacing: 0.02em;
}

.nav-card-arrow {
  color: rgba(148,163,184,0.4);
  transition: color 0.2s, transform 0.2s;
  flex-shrink: 0;
}
.nav-card:not(.nav-card--locked):hover .nav-card-arrow {
  color: var(--card-accent);
  transform: translateX(3px);
}

/* ── Coming Soon badge ───────────────────────────────────── */
.coming-soon-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg,
    rgba(var(--card-accent-rgb), 0.92),
    rgba(var(--card-accent-rgb), 0.72)
  );
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 11px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.25);
  white-space: nowrap;
  box-shadow: 0 2px 10px rgba(var(--card-accent-rgb), 0.45);
  pointer-events: none;
  z-index: 2;
}

/* ══════════════════════════════════════════════════════════
   SLIDE-OUT TRANSITION OVERLAY
   ══════════════════════════════════════════════════════════ */
.slide-overlay {
  position: fixed; inset: 0;
  z-index: 9999;
  background: #07071a;
  transform: translateX(100%);
  transition: transform 0.55s cubic-bezier(0.86, 0, 0.07, 1);
  pointer-events: none;
}
.slide-overlay.active {
  transform: translateX(0);
  pointer-events: all;
}