/* ── Gradient utilities ──────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, #ffcc67 0%, #ff67cb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-bg {
  background: linear-gradient(135deg, #ffcc67 0%, #ff67cb 100%);
}

/* ── Hero mesh bg ────────────────────────────────── */
.hero-bg {
  background:
    radial-gradient(
      ellipse at 15% 85%,
      rgba(255, 204, 103, 0.18) 0%,
      transparent 55%
    ),
    radial-gradient(
      ellipse at 85% 15%,
      rgba(255, 103, 203, 0.15) 0%,
      transparent 55%
    ),
    #f8fafc;
}

/* ── Scroll-reveal ───────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition:
    opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-right {
  opacity: 0;
  transform: translateX(28px);
  transition:
    opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: none;
}

.delay-1 {
  transition-delay: 0.1s;
}
.delay-2 {
  transition-delay: 0.2s;
}
.delay-3 {
  transition-delay: 0.3s;
}
.delay-4 {
  transition-delay: 0.4s;
}
.delay-5 {
  transition-delay: 0.5s;
}
.delay-6 {
  transition-delay: 0.6s;
}

/* ── Sticky nav bg on scroll ─────────────────────── */
#navbar {
  transition:
    background 0.3s,
    box-shadow 0.3s;
}
#navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 24px rgba(0, 0, 0, 0.07);
}

/* ── Tech card float ─────────────────────────────── */
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}
.float-anim {
  animation: float 3.2s ease-in-out infinite;
}

/* ── Form focus ring ─────────────────────────────── */
.form-input:focus {
  outline: none;
  border-color: #ffcc67;
  box-shadow: 0 0 0 3px rgba(255, 204, 103, 0.22);
}

/* ── Scroll-up button ────────────────────────────── */
#scrollup {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
#scrollup.visible {
  opacity: 1;
  pointer-events: all;
}

/* ── 3D Tech Cube ────────────────────────────────── */
.cube-wrap {
  perspective: 600px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
}

.cube {
  width: 128px;
  height: 128px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.75s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cube-wrap:hover .cube {
  transform: rotateX(-90deg);
}

.cube-face {
  position: absolute;
  width: 128px;
  height: 128px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  overflow: hidden;
  backface-visibility: hidden;
}

.cube-face--front {
  background: #fff;
  border: 1px solid #f1f5f9;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
  transform: translateZ(64px);
}

.cube-face--top {
  background: linear-gradient(135deg, #ffcc67 0%, #ff67cb 100%);
  transform: rotateX(90deg) translateZ(64px);
  padding: 12px;
  text-align: center;
}

.cube-face--top span {
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
}