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

/* ---------- Variables ---------- */
:root {
  --overlay-dark: rgba(0, 0, 0, 0.68);
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Page ---------- */
body {
  min-height: 100svh;
  overflow: hidden;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-image) center / cover no-repeat;
  position: relative;
  opacity: 0;
  animation: pageFade 0.8s var(--ease-soft) forwards;
  transition: background 0.6s var(--ease-soft);
}

/* ---------- Ambient layers ---------- */
body::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 30% 30%,
    rgba(255, 255, 255, 0.06),
    transparent 60%
  );
  animation: drift 40s ease-in-out infinite alternate;
  pointer-events: none;
}

body::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("grain.png") repeat;
  opacity: 0.06;
  pointer-events: none;
}

/* ---------- Themes ---------- */
html[data-theme="dark"] body {
  --bg-image:
    linear-gradient(var(--overlay-dark), var(--overlay-dark)),
    url("bg-dark.jpg");
}

html[data-theme="light"] body {
  --bg-image:
    radial-gradient(
      circle at 50% 45%,
      rgba(0, 0, 0, 0.12),
      rgba(255, 255, 255, 0.55)
    ),
    url("bg-light.jpg");
}

/* ---------- Hero ---------- */
.hero {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  position: relative;
}

/* ---------- Logo ---------- */
.logo {
  width: clamp(240px, 50vw, 420px);
  max-width: 85%;
  opacity: 0;
  animation: logoFade 1.2s var(--ease-soft) forwards;
  animation-delay: 0.15s;
  transform: translateY(-2%);
}

html[data-theme="light"] .logo {
  transform: translateY(-2%) scale(1.05);
}

/* ---------- Controls ---------- */
.controls-right {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
  transition:
    opacity 0.6s var(--ease-soft),
    transform 0.6s var(--ease-soft);
}

.controls-right.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
}

/* ---------- Buttons ---------- */
.mode-toggle,
.contact-toggle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  transition:
    background 0.3s var(--ease-soft),
    box-shadow 0.3s var(--ease-soft);
}

/* ---------- Entrance animation ---------- */
.mode-toggle,
.contact-toggle {
  opacity: 0;
  animation: controlFadeUp 0.6s var(--ease-soft) forwards;
}

.mode-toggle { animation-delay: 0.6s; }
.contact-toggle { animation-delay: 0.75s; }

/* ---------- Hover glow ---------- */
.mode-toggle:hover,
.contact-toggle:hover {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.03);
}

html[data-theme="light"] .mode-toggle:hover,
html[data-theme="light"] .contact-toggle:hover {
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.03);
}

/* ---------- Contact ---------- */
.contact-toggle {
  font-size: 17px;
  font-weight: 500;
  color: white;
  text-decoration: none;
  opacity: 0.9;
}

html[data-theme="light"] .contact-toggle {
  color: rgba(0, 0, 0, 0.75);
}

/* ---------- Mode icons ---------- */
.mode-toggle {
  border: none;
  cursor: pointer;
}

.mode-toggle .icon {
  position: absolute;
  font-size: 16px;
  transition: opacity 0.3s var(--ease-soft), transform 0.3s var(--ease-soft);
}

/* Night */
html[data-theme="dark"] .sun {
  opacity: 0;
  transform: scale(0.6);
}

html[data-theme="dark"] .moon {
  opacity: 1;
  transform: scale(1);
  color: white;
}

/* Day */
html[data-theme="light"] .sun {
  opacity: 0.85;
  transform: scale(1);
}

html[data-theme="light"] .moon {
  opacity: 0;
  transform: scale(0.6);
}

/* ---------- Animations ---------- */
@keyframes pageFade {
  to { opacity: 1; }
}

@keyframes logoFade {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(-2%); }
}

@keyframes drift {
  from { transform: translate(-5%, -5%); }
  to   { transform: translate(5%, 5%); }
}

@keyframes controlFadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .controls-right {
    gap: 8px;
    flex-direction: column-reverse;
  }
}