/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2.25rem;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.5s var(--ease-dramatic);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius-sm);
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
}

.btn:hover::before {
  transform: translateX(120%);
}

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

.btn-primary:hover {
  background: #fff;
  color: var(--color-bg);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0, 212, 170, 0.3), 0 0 0 1px rgba(0, 212, 170, 0.2);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-3px);
  background: rgba(0, 212, 170, 0.05);
  box-shadow: 0 16px 48px rgba(0, 212, 170, 0.1);
}

.btn svg {
  transition: transform 0.4s var(--ease-spring);
}

.btn:hover svg {
  transform: translateX(5px);
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  transition: all 0.6s var(--ease-dramatic);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background:
    radial-gradient(circle at 50% 0%, rgba(0, 212, 170, 0.08), transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(124, 92, 252, 0.05), transparent 50%);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}

.card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

.card:hover::after {
  opacity: 1;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: all 0.5s var(--ease);
}

.navbar--scrolled {
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--glass-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 1001;
}

.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 14px rgba(0, 212, 170, 0.4)) brightness(1.6);
  transition: filter 0.4s var(--ease), transform 0.4s var(--ease);
}

.navbar__logo:hover .logo-img {
  filter: drop-shadow(0 0 28px rgba(0, 212, 170, 0.7)) brightness(1.8);
  transform: scale(1.05);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.navbar__nav a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  position: relative;
  transition: color 0.4s var(--ease);
}

.navbar__nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width 0.5s var(--ease-dramatic);
}

.navbar__nav a:hover,
.navbar__nav a.active {
  color: var(--color-text-bright);
}

.navbar__nav a:hover::after,
.navbar__nav a.active::after {
  width: 100%;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1200;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
}

.slide-dots {
  position: fixed;
  right: clamp(1rem, 2vw, 2rem);
  top: 50%;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transform: translateY(-50%);
}

.slide-dot {
  display: grid;
  grid-template-columns: 2.2rem 0fr;
  align-items: center;
  min-height: 2.2rem;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(5, 5, 8, 0.65);
  color: var(--color-text-muted);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-sm);
  transition: grid-template-columns 0.4s var(--ease-dramatic), border-color 0.4s var(--ease), color 0.4s var(--ease), background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.slide-dot span {
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.slide-dot strong {
  min-width: 0;
  padding-right: 0;
  opacity: 0;
  white-space: nowrap;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  transition: opacity 0.3s var(--ease), padding 0.4s var(--ease);
}

.slide-dot:hover,
.slide-dot.active {
  grid-template-columns: 2.2rem 5.8rem;
  color: var(--color-text-bright);
  border-color: rgba(0, 212, 170, 0.35);
  background: rgba(0, 212, 170, 0.08);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.1);
}

.slide-dot:hover strong,
.slide-dot.active strong {
  opacity: 1;
  padding-right: 0.9rem;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 0;
}

.navbar__toggle span {
  display: block;
  width: 28px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.4s var(--ease);
  transform-origin: center;
}

.navbar__toggle--active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.navbar__toggle--active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.navbar__toggle--active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

@media (max-width: 767px) {
  .navbar__toggle { display: flex; }

  .navbar__nav {
    position: fixed;
    inset: 0;
    background: rgba(5, 5, 8, 0.97);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s var(--ease);
  }

  .navbar__nav--open {
    opacity: 1;
    pointer-events: all;
  }

  .navbar__nav a {
    font-size: 1.5rem;
    font-family: 'Syne', var(--font);
    font-weight: 700;
    letter-spacing: 0.08em;
  }

  .slide-dots {
    right: 50%;
    top: auto;
    bottom: 1rem;
    flex-direction: row;
    transform: translateX(50%);
    gap: 0.35rem;
  }

  .slide-dot {
    grid-template-columns: 1.9rem 0fr;
    min-height: 1.9rem;
    border-radius: 999px;
  }

  .slide-dot strong {
    display: none;
  }

  .slide-dot:hover,
  .slide-dot.active {
    grid-template-columns: 2.8rem 0fr;
  }
}

/* ── Form ── */
.form-group { margin-bottom: var(--space-sm); }

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1.1rem 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: var(--color-text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 2px 16px rgba(0, 212, 170, 0.1);
}

.form-group textarea {
  resize: none;
  min-height: 100px;
}

/* ── Badge ── */
.badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.75rem;
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-radius: 999px;
}