/* ==========================================================================
   Dronaid — landing page styles
   Theme: explicit light/dark toggle (persisted), dark is the default.
   ========================================================================== */

:root {
  /* ---- Palette (dark, default) ---- */
  --bg: #0a0e1a;
  --bg-soft: #0d1220;
  --surface: #121826;
  --surface-2: #1a2333;
  --surface-3: #212c40;
  --border: #242e44;
  --border-strong: #34405c;
  --ink: #f1f4fa;
  --ink-dim: #96a1b8;
  --ink-faint: #5b6785;
  --accent: #ef4444;
  --accent-bright: #ff6b6b;
  --accent-dim: rgba(239, 68, 68, 0.14);
  --accent-line: rgba(239, 68, 68, 0.35);
  --signal: #38bdf8;
  --signal-dim: rgba(56, 189, 248, 0.14);
  --signal-line: rgba(56, 189, 248, 0.35);
  --ok: #22c55e;
  --ok-dim: rgba(34, 197, 94, 0.14);
  --shadow: rgba(0, 0, 0, 0.45);

  --font-display: "Sora", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Manrope", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;
}

:root[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-soft: #eaeef7;
  --surface: #ffffff;
  --surface-2: #f1f4fa;
  --surface-3: #e6eaf3;
  --border: #dde3ef;
  --border-strong: #c7d0e2;
  --ink: #10182a;
  --ink-dim: #4b5670;
  --ink-faint: #8792a8;
  --accent: #dc2626;
  --accent-bright: #ef4444;
  --accent-dim: rgba(220, 38, 38, 0.1);
  --accent-line: rgba(220, 38, 38, 0.32);
  --signal: #0284c7;
  --signal-dim: rgba(2, 132, 199, 0.1);
  --signal-line: rgba(2, 132, 199, 0.32);
  --ok: #16a34a;
  --ok-dim: rgba(22, 163, 74, 0.1);
  --shadow: rgba(16, 24, 42, 0.08);
}

* { box-sizing: border-box; }
/* Le defilement fluide lui-meme est gere par Lenis (assets/script.js), qui
   anime aussi bien la molette/trackpad que les sauts d'ancre et respecte de
   lui-meme prefers-reduced-motion. scroll-margin-top (plus bas) reste en
   filet de secours pour une navigation directe vers une ancre (URL avec
   #hash, avant que Lenis ne soit initialise). */

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 0%, color-mix(in srgb, var(--signal) 6%, transparent) 0%, transparent 45%),
    radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--accent) 5%, transparent) 0%, transparent 40%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  transition: background-color 0.2s ease, color 0.2s ease;
}

h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; margin: 0; }
p { margin: 0; }
a { color: inherit; }
img, svg { max-width: 100%; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

section { scroll-margin-top: 84px; }

/* ---------- Nav ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex: none; }
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent-bright), #b91c1c);
  display: grid;
  place-items: center;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset, 0 6px 16px -6px rgba(239, 68, 68, 0.5);
  flex: none;
}
.brand-mark svg { width: 16px; height: 16px; }
.brand-word { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; letter-spacing: 0.01em; white-space: nowrap; }

.nav-right { display: flex; align-items: center; gap: 20px; }
nav.links { display: flex; gap: 26px; font-size: 0.875rem; font-weight: 600; color: var(--ink-dim); }
nav.links a { text-decoration: none; transition: color 0.15s ease; }
nav.links a:hover, nav.links a:focus-visible { color: var(--ink); }
nav.links a:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; border-radius: 4px; }
@media (max-width: 720px) { nav.links { display: none; } }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-dim);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--border-strong); }
.theme-toggle:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .i-moon { display: none; }
:root[data-theme="light"] .theme-toggle .i-sun { display: none; }
:root[data-theme="light"] .theme-toggle .i-moon { display: block; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(52px, 8vw, 100px) clamp(36px, 6vw, 64px);
  overflow: hidden;
  background-image: url("images/family-sunset.jpg");
  background-size: cover;
  background-position: center 55%;
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    color-mix(in srgb, var(--bg) 93%, transparent) 0%,
    color-mix(in srgb, var(--bg) 78%, transparent) 32%,
    color-mix(in srgb, var(--bg) 45%, transparent) 68%,
    color-mix(in srgb, var(--bg) 30%, transparent) 100%
  );
}
@media (max-width: 900px) {
  .hero::before {
    background: linear-gradient(
      180deg,
      color-mix(in srgb, var(--bg) 88%, transparent) 0%,
      color-mix(in srgb, var(--bg) 60%, transparent) 55%,
      color-mix(in srgb, var(--bg) 88%, transparent) 100%
    );
  }
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.hero h1 {
  font-size: clamp(2.2rem, 4vw + 0.7rem, 3.7rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin-block: 16px 20px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent-bright), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead { font-size: 1.08rem; color: var(--ink-dim); max-width: 46ch; font-weight: 500; }

.stat-row { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--border); }
.stat-row .stat b { display: block; font-family: var(--font-mono); font-size: 1.35rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat-row .stat span { font-size: 0.78rem; color: var(--ink-faint); max-width: 16ch; display: block; }

/* ---------- Radar visual ---------- */
.radar-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg-soft) 100%);
  padding: 20px;
  overflow: hidden;
  box-shadow: 0 20px 40px -24px var(--shadow);
}
.radar-stage {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 14px;
  background-image: radial-gradient(circle, var(--border-strong) 1px, transparent 1px);
  background-size: 22px 22px;
  background-position: center;
  overflow: hidden;
}
.radar-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 62%, transparent 0%, var(--bg-soft) 78%);
}
.ping-ring {
  position: absolute;
  top: 63%; left: 50%;
  width: 30%;
  aspect-ratio: 1/1;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.6);
}
@media (prefers-reduced-motion: no-preference) {
  .ping-ring { animation: ping 3.2s cubic-bezier(0.2, 0.6, 0.35, 1) infinite; }
  .ping-ring.d2 { animation-delay: 1.07s; }
  .ping-ring.d3 { animation-delay: 2.14s; }
}
@media (prefers-reduced-motion: reduce) { .ping-ring { opacity: 0.16; transform: translate(-50%, -50%) scale(2); } }
@keyframes ping {
  0% { opacity: 0.55; transform: translate(-50%, -50%) scale(0.6); }
  75% { opacity: 0; transform: translate(-50%, -50%) scale(2.6); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(2.6); }
}
.ping-dot {
  position: absolute; top: 63%; left: 50%; transform: translate(-50%, -50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 0 4px var(--accent-dim), 0 0 22px 4px rgba(239, 68, 68, 0.45);
  z-index: 2;
}
.drone-wrap {
  position: absolute; top: 10%; left: 50%; width: 52%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--ink-dim);
}
@media (prefers-reduced-motion: no-preference) { .drone-wrap { animation: hover 4.4s ease-in-out infinite; } }
@keyframes hover { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, -7px); } }
.drone-wrap svg { width: 100%; height: auto; display: block; }
.drone-label { text-align: center; font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--ink-faint); margin-top: 2px; }

.radar-tag { position: absolute; top: 14px; left: 14px; display: flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; color: var(--accent); z-index: 3; }
.radar-tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-bright); box-shadow: 0 0 8px 1px rgba(239, 68, 68, 0.7); }
@media (prefers-reduced-motion: no-preference) { .radar-tag i { animation: blink 1.6s steps(1) infinite; } }
@keyframes blink { 50% { opacity: 0.25; } }
.radar-coord { position: absolute; bottom: 14px; right: 14px; font-family: var(--font-mono); font-size: 0.68rem; color: var(--ink-faint); z-index: 3; }

.log-panel { margin-top: 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-soft); padding: 14px 16px; font-family: var(--font-mono); font-size: 0.72rem; line-height: 1.9; color: var(--ink-faint); }
.log-panel .ev { color: var(--signal); }
.log-panel .ok { color: var(--ok); }
.log-panel .warn { color: var(--accent); }
.log-panel .cursor { display: inline-block; width: 6px; height: 12px; background: var(--signal); vertical-align: -2px; margin-left: 2px; }
@media (prefers-reduced-motion: no-preference) { .log-panel .cursor { animation: blink 1s steps(1) infinite; } }

/* ---------- Context band ---------- */
.context { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-soft); padding-block: clamp(44px, 6vw, 64px); }
.context .wrap { display: grid; grid-template-columns: 0.55fr 1fr auto; gap: clamp(24px, 4vw, 40px); align-items: center; }
@media (max-width: 900px) { .context .wrap { grid-template-columns: 1fr; } }
.context h2 { font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 700; line-height: 1.15; }
.context p { color: var(--ink-dim); font-size: 1.02rem; max-width: 62ch; }
.context p + p { margin-top: 14px; }
.clock-mark { color: var(--accent); flex: none; justify-self: center; }
.clock-mark svg { width: 84px; height: 84px; }
@media (max-width: 900px) { .clock-mark { display: none; } }

/* ---------- Safety section ---------- */
.safety-section { padding-block: clamp(56px, 8vw, 92px); }
.safety-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
@media (max-width: 900px) { .safety-grid { grid-template-columns: 1fr; } }
@media (max-width: 900px) { .safety-grid { direction: ltr; } }
.family-card {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(165deg, var(--ok-dim), var(--surface) 55%);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: 0 20px 40px -26px var(--shadow);
}
.family-card svg { width: 100%; height: auto; display: block; color: var(--ink-dim); }
.safety-copy h2 { font-size: clamp(1.7rem, 2.8vw, 2.3rem); font-weight: 700; }
.safety-copy .lead { font-size: 1.05rem; color: var(--ink-dim); margin-top: 14px; max-width: 54ch; }
.safety-points { margin-top: 26px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 24px; }
@media (max-width: 640px) { .safety-points { grid-template-columns: 1fr; } }
.safety-point { display: flex; gap: 12px; align-items: flex-start; }
.safety-point .dot { width: 22px; height: 22px; border-radius: 50%; background: var(--ok-dim); color: var(--ok); display: grid; place-items: center; flex: none; margin-top: 1px; }
.safety-point .dot svg { width: 12px; height: 12px; }
.safety-point p { font-size: 0.94rem; color: var(--ink-dim); }
.safety-point strong { color: var(--ink); font-weight: 700; }

.hero .credit {
  position: absolute;
  bottom: 10px; right: clamp(20px, 4vw, 48px);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--ink-faint);
  opacity: 0.85;
}

/* ---------- Sequence ---------- */
.sequence-section { padding-block: clamp(56px, 8vw, 88px); }
.section-head { max-width: 62ch; margin-bottom: clamp(32px, 5vw, 48px); }
.section-head h2 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); font-weight: 700; margin-top: 10px; }
.section-head p { color: var(--ink-dim); margin-top: 10px; font-size: 1rem; }

.sequence {
  position: relative;
  max-width: 640px;
  margin-inline: auto;
}
.sequence::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 19px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-line), var(--border) 15%, var(--border) 85%, var(--signal-line));
}
.step {
  position: relative;
  display: flex;
  flex-direction: row;
  gap: 18px;
  padding-block: 22px;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.step.is-visible { opacity: 1; transform: translateY(0); }
.step-num { width: 40px; height: 40px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border-strong); display: grid; place-items: center; font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; color: var(--ink); z-index: 1; flex: none; transition: border-color 0.4s ease, color 0.4s ease; }
.step.is-visible .step-num { border-color: var(--accent-line); color: var(--accent); }
.step:last-child.is-visible .step-num { border-color: var(--signal-line); color: var(--signal); }
.step h3 { font-size: 1rem; font-weight: 700; margin-top: 4px; }
.step p { font-size: 0.88rem; color: var(--ink-dim); margin-top: 4px; }

@media (prefers-reduced-motion: reduce) {
  .step { opacity: 1; transform: none; transition: none; }
}

/* ---------- Features ---------- */
.features-section { padding-block: clamp(56px, 8vw, 88px); border-top: 1px solid var(--border); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 18px; overflow: hidden; }
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }
.feature { background: var(--surface); padding: 26px 24px; display: flex; flex-direction: column; gap: 14px; transition: background 0.15s ease; }
.feature:hover { background: var(--surface-2); }
.feature.emph { grid-column: span 2; background: linear-gradient(160deg, var(--surface-2), var(--surface)); }
@media (max-width: 560px) { .feature.emph { grid-column: span 1; } }
.feature .ico { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: var(--accent-dim); color: var(--accent); flex: none; }
.feature.signal .ico { background: var(--signal-dim); color: var(--signal); }
.feature.ok .ico { background: var(--ok-dim); color: var(--ok); }
.feature .ico svg { width: 18px; height: 18px; }
.feature h3 { font-size: 1rem; font-weight: 700; }
.feature.emph h3 { font-size: 1.15rem; }
.feature p { font-size: 0.88rem; color: var(--ink-dim); }

/* ---------- Pillars ---------- */
.pillars-section { padding-block: clamp(56px, 8vw, 88px); border-top: 1px solid var(--border); }
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 860px) { .pillars { grid-template-columns: 1fr; } }
.pillar { border: 1px solid var(--border); border-radius: 16px; padding: 24px 24px 22px; background: var(--surface); display: flex; flex-direction: column; gap: 12px; box-shadow: 0 16px 32px -28px var(--shadow); }
.pillar .glyph { width: 38px; height: 38px; border-radius: 10px; background: var(--surface-2); color: var(--ink-dim); display: grid; place-items: center; }
.pillar .glyph svg { width: 20px; height: 20px; }
.pillar .tag { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; color: var(--ink-faint); text-transform: uppercase; }
.pillar h3 { font-size: 1.1rem; font-weight: 700; }
.pillar p { font-size: 0.9rem; color: var(--ink-dim); }
.pillar .who { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border); font-size: 0.82rem; color: var(--ink-faint); }

/* ---------- Footer ---------- */
footer.close { position: relative; padding-block: clamp(48px, 7vw, 80px) 40px; overflow: hidden; }
.close-watermark { position: absolute; top: 50%; right: -2%; width: min(360px, 40%); transform: translateY(-50%); color: var(--ink); opacity: 0.05; pointer-events: none; }
.close-watermark svg { width: 100%; height: auto; display: block; }
.close-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: clamp(28px, 5vw, 56px); align-items: end; }
@media (max-width: 780px) { .close-grid { grid-template-columns: 1fr; } }
.close h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 700; }
.close p { color: var(--ink-dim); margin-top: 12px; max-width: 52ch; }
.foot-meta { text-align: right; font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint); line-height: 1.8; }
@media (max-width: 780px) { .foot-meta { text-align: left; } }
.foot-rule { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.78rem; color: var(--ink-faint); }