/* ==========================================================================
   Dreidrone: dark, bold startup theme
   ========================================================================== */

:root {
  --bg: #0b0d10;
  --bg-raised: #12151a;
  --bg-card: #14181e;
  --border: #232830;
  --text: #eef1f4;
  --text-muted: #9aa3ad;
  --accent: #c6f135;
  --accent-dim: rgba(198, 241, 53, 0.12);
  --accent-contrast: #10130a;
  --accent-hover: #d6fb55;
  --accent-border: rgba(198, 241, 53, 0.25);
  --accent-border-strong: rgba(198, 241, 53, 0.4);
  --header-bg: rgba(11, 13, 16, 0.82);
  --hero-glow: rgba(198, 241, 53, 0.1);
  --placeholder: #5c6570;
  --btn-radius: 999px;

  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;

  --container: 1120px;
  --radius: 16px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- Typography ---------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(3rem, 9vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3.25rem); margin-bottom: 24px; }
h3 { font-size: 1.35rem; margin-bottom: 12px; }

.accent { color: var(--accent); }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 20px;
}

.lede {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 56ch;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  padding: 14px 28px;
  border-radius: var(--btn-radius);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover { border-color: var(--text-muted); }

.btn-small { padding: 9px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* ---------- Header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  text-decoration: none;
}

.brand-mark { width: 32px; height: 32px; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-menu > a:not(.btn) {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-menu > a:not(.btn):hover { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 96px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 60% 50% at 70% 20%, var(--hero-glow), transparent 70%),
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
  mask-image: linear-gradient(to bottom, black 40%, transparent);
  opacity: 0.6;
}

.hero-inner { position: relative; }

.hero h1 { margin-bottom: 24px; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

/* ---------- Hero drone ---------- */

.hero-drone {
  position: absolute;
  top: 24px;
  right: 24px;
  width: min(250px, 22vw);
  pointer-events: none;
}

.hero-drone svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

#drone-glow stop { stop-color: var(--accent); }

.hero-drone .frame {
  stroke: var(--text);
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-drone .drone-body,
.hero-drone .motor { fill: var(--bg-raised); }

.rotor-disc {
  stroke: var(--accent);
  stroke-width: 1.25;
  stroke-dasharray: 5 7;
  opacity: 0.45;
}

.rotor-blades line {
  stroke: var(--accent);
  stroke-width: 2.25;
  stroke-linecap: round;
  opacity: 0.85;
}

.rotor-blades {
  transform-box: view-box;
  animation: rotor-spin 0.4s linear infinite;
}

.rotor-blades.ccw { animation-direction: reverse; }

.rotor-hub { fill: var(--accent); }

.hero-drone .detail {
  stroke: var(--text);
  stroke-width: 1.25;
  opacity: 0.5;
}

.hero-drone .antenna {
  fill: var(--text);
  opacity: 0.7;
}

.drone-float {
  transform-box: fill-box;
  transform-origin: center;
  animation: drone-hover 4.5s ease-in-out infinite;
}

.drone-sway {
  transform-box: fill-box;
  transform-origin: center;
  animation: drone-sway 7s ease-in-out infinite;
}

.drone-shadow {
  transform-box: fill-box;
  transform-origin: center;
  animation: shadow-pulse 4.5s ease-in-out infinite;
}

.status-light {
  fill: var(--accent);
  animation: status-blink 2.4s ease-in-out infinite;
}

@keyframes drone-hover {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-7px) scale(1.04); }
}

@keyframes drone-sway {
  0%, 100% { transform: rotate(-1.4deg); }
  50% { transform: rotate(1.4deg); }
}

@keyframes rotor-spin {
  to { transform: rotate(360deg); }
}

@keyframes shadow-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.88); opacity: 0.55; }
}

@keyframes status-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.hero-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-badges li {
  display: flex;
  align-items: center;
  gap: 14px;
}

.badge-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 12px;
  color: var(--accent);
}

.badge-icon svg { width: 22px; height: 22px; }

.badge-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.badge-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
}

/* ---------- Sections ---------- */

.section { padding: 112px 0; }

.section-alt {
  background: var(--bg-raised);
  border-block: 1px solid var(--border);
}

/* ---------- Service cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-border-strong);
}

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  background: var(--accent-dim);
  border-radius: 12px;
  color: var(--accent);
  margin-bottom: 20px;
}

.card-icon svg { width: 26px; height: 26px; }

.card p { color: var(--text-muted); margin-bottom: 16px; }

.card ul { list-style: none; }

.card li {
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 2px;
  background: var(--accent);
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-points {
  list-style: none;
  display: grid;
  gap: 16px;
}

.about-points li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  color: var(--text-muted);
}

.about-points strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 4px;
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-details { margin-top: 32px; display: grid; gap: 12px; }

.contact-details p { color: var(--text); }

.contact-details span {
  display: inline-block;
  min-width: 90px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-details a {
  color: var(--accent);
  text-decoration: none;
}

.contact-details a:hover { text-decoration: underline; }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  gap: 18px;
}

.field { display: grid; gap: 6px; }

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field input,
.field select,
.field textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s ease;
}

.field textarea { resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
}

.field input::placeholder,
.field textarea::placeholder { color: var(--placeholder); }

.form-status {
  min-height: 1.4em;
  font-size: 0.95rem;
  color: var(--accent);
  text-align: center;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover { color: var(--text); }

.footer-note {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---------- Theme switcher (temporary, for design review) ---------- */

.theme-switcher {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 8px 6px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.theme-switcher span { margin-right: 6px; }

.theme-switcher button {
  font: inherit;
  background: none;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text-muted);
  padding: 4px 10px;
  cursor: pointer;
}

.theme-switcher button:hover { color: var(--text); }

.theme-switcher button.is-active {
  background: var(--accent-dim);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
  .rotor-blades, .drone-float, .drone-sway, .drone-shadow, .status-light { animation: none; }
}

@media (max-width: 1000px) {
  .hero-drone { display: none; }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .section { padding: 80px 0; }
}

@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 8px;
    padding: 16px 24px 24px;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--border);
    display: none;
  }

  .nav-menu.is-open { display: flex; }

  .nav-menu > a:not(.btn) { padding: 10px 0; }

  .hero { padding: 80px 0 64px; }
}