/* ============================================
   hellodarren.com
   Zero-dependency landing page
   ============================================ */

:root {
  --bg: #0a0a0a;
  --fg: #f0ede8;
  --fg-muted: rgba(240, 237, 232, 0.4);
  --accent: #f0ede8;
  --font: 'Google Sans Flex', system-ui, -apple-system, sans-serif;

  /* Animation timing */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --stagger: 0.12s;
}

/* ---- Reset ---- */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
  height: 100dvh;
  width: 100vw;
  cursor: crosshair;
}

/* ---- Canvas ---- */

#canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ---- Switcher ---- */

.switcher,
.palette-switcher {
  position: fixed;
  bottom: clamp(1.2rem, 3vw, 2rem);
  z-index: 10;
  display: flex;
  gap: 0.4rem;
}

.switcher {
  right: clamp(1.2rem, 3vw, 2rem);
}

.palette-switcher {
  left: clamp(1.2rem, 3vw, 2rem);
}

.switcher button,
.palette-switcher button {
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(240, 237, 232, 0.15);
  border-radius: 50%;
  background: rgba(10, 10, 10, 0.5);
  color: var(--fg-muted);
  font-family: var(--font);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.switcher button:hover,
.palette-switcher button:hover {
  border-color: rgba(240, 237, 232, 0.4);
  color: var(--fg);
}

.switcher button.active,
.palette-switcher button.active {
  border-color: var(--fg);
  color: var(--fg);
  background: rgba(240, 237, 232, 0.1);
}

/* Auto-rotate button */

.auto-btn {
  color: var(--fg-muted);
}

.auto-btn svg {
  display: block;
}

/* Fullscreen button */
.fs-btn {
  position: fixed;
  top: clamp(1.2rem, 3vw, 2rem);
  right: clamp(1.2rem, 3vw, 2rem);
  z-index: 10;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid rgba(240, 237, 232, 0.35);
  border-radius: 50%;
  background: rgba(10, 10, 10, 0.5);
  color: var(--fg);
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

.fs-btn.visible {
  opacity: 1;
}

.fs-btn:hover {
  border-color: rgba(240, 237, 232, 0.4);
  color: var(--fg);
}

.fs-btn.active {
  border-color: var(--fg);
  color: var(--fg);
  background: rgba(240, 237, 232, 0.1);
}

.auto-btn.active {
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240, 237, 232, 0); }
  50% { box-shadow: 0 0 8px 2px rgba(240, 237, 232, 0.25); }
}

/* Colour swatches */

.swatch {
  display: block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
}

.swatch-mono {
  background: #f0ede8;
}

.swatch-fire {
  background: linear-gradient(135deg, #ff4400, #ffaa00);
}

.swatch-neon {
  background: linear-gradient(135deg, #00ffcc, #ff00ff);
}

.swatch-rainbow {
  background: conic-gradient(#ff0000, #ffaa00, #00ff00, #00aaff, #aa00ff, #ff0000);
}

/* ---- Overlay ---- */

.overlay {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100dvh;
  padding: clamp(2rem, 8vw, 8rem);
  pointer-events: none;
  text-align: center;
  transition: opacity 1s ease;
  opacity: 0;
}

.overlay.visible {
  opacity: 1;
}

.overlay.hidden {
  opacity: 0;
}

/* Small top-left logo state — no transitions, instant reposition */
.overlay.docked {
  align-items: flex-start;
  justify-content: flex-start;
  height: auto;
  position: fixed;
  top: 0;
  left: 0;
  padding: clamp(1.2rem, 3vw, 2rem);
  transition: none;
}

.content {
  max-width: 56rem;
}

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

h1 {
  font-size: clamp(2.8rem, 8vw, 7.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 0.3em;
}

.overlay.docked h1 {
  font-size: 1.4rem;
  margin-bottom: 0;
}

/* Docked logo fades in cleanly */
.overlay.docked .word {
  animation: none !important;
  opacity: 0;
}

.overlay.docked.show .word {
  opacity: 1;
  transition: opacity 0.8s ease;
}

h1 em {
  font-style: normal;
  background: linear-gradient(135deg, #fff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: clamp(1rem, 2.2vw, 1.6rem);
  font-weight: 300;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

/* ---- Hint Messages ---- */

/* ---- Hint Messages ---- */

.hint {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background: var(--bg);
  transition: opacity 1s ease;
}

.hint.fade-out {
  opacity: 0;
}

.hint-line {
  position: absolute;
  font-family: var(--font);
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg-muted);
  opacity: 0;
  transition: opacity 0.7s ease;
}

.hint-line.show {
  opacity: 1;
}

/* ---- Intro Sequence ---- */

/* Canvas hidden until background starts */
#canvas {
  opacity: 0;
  transition: opacity 1.5s ease;
}

#canvas.visible {
  opacity: 1;
}

/* Controls hidden until background starts */
.switcher,
.palette-switcher {
  opacity: 0;
  transition: opacity 1s ease;
}

.switcher.hidden,
.palette-switcher.hidden {
  opacity: 0;
}

.switcher.visible,
.palette-switcher.visible {
  opacity: 1;
}

/* ---- Reveal Animations (5 random on load) ---- */

.line {
  display: block;
}

.word {
  display: inline-block;
}

/* 1. Slide Up */
.anim-slide-up .word {
  opacity: 0;
  transform: translateY(60px);
  animation: a-slide-up 1.2s var(--ease-out-expo) 1s forwards;
}
@keyframes a-slide-up {
  to { opacity: 1; transform: translateY(0); }
}

/* 2. Scale Fade */
.anim-scale-fade .word {
  opacity: 0;
  transform: scale(1.8);
  animation: a-scale-fade 1.4s var(--ease-out-expo) 1s forwards;
}
@keyframes a-scale-fade {
  to { opacity: 1; transform: scale(1); }
}

/* 3. Blur In */
.anim-blur-in .word {
  opacity: 0;
  filter: blur(20px);
  animation: a-blur-in 1.5s ease-out 1s forwards;
}
@keyframes a-blur-in {
  to { opacity: 1; filter: blur(0); }
}

/* 4. Flicker */
.anim-flicker .word {
  opacity: 0;
  animation: a-flicker 1.5s ease 1s forwards;
}
@keyframes a-flicker {
  0%   { opacity: 0; }
  5%   { opacity: 0.8; }
  10%  { opacity: 0.1; }
  15%  { opacity: 0.9; }
  20%  { opacity: 0; }
  30%  { opacity: 0.7; }
  35%  { opacity: 0.2; }
  40%  { opacity: 1; }
  45%  { opacity: 0.3; }
  50%  { opacity: 0.9; }
  55%  { opacity: 0.1; }
  65%  { opacity: 0.95; }
  70%  { opacity: 0.4; }
  80%  { opacity: 1; }
  90%  { opacity: 0.8; }
  100% { opacity: 1; }
}

/* 5. Drop Down */
.anim-drop .word {
  opacity: 0;
  transform: translateY(-60px);
  animation: a-drop 1s var(--ease-out-expo) 1s forwards;
}
@keyframes a-drop {
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Outro Animations (reverse of intros) ---- */

/* 1. Slide Down (reverse of Slide Up) */
.overlay.docked .outro-slide-down .word {
  animation: o-slide-down 0.8s var(--ease-out-expo) forwards !important;
}
@keyframes o-slide-down {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(60px); }
}

/* 2. Scale Fade Out (reverse of Scale Fade) */
.overlay.docked .outro-scale-fade .word {
  animation: o-scale-fade 0.8s var(--ease-out-expo) forwards !important;
}
@keyframes o-scale-fade {
  from { opacity: 1; transform: scale(1); }
  to { opacity: 0; transform: scale(1.8); }
}

/* 3. Blur Out (reverse of Blur In) */
.overlay.docked .outro-blur-out .word {
  animation: o-blur-out 0.8s ease-out forwards !important;
}
@keyframes o-blur-out {
  from { opacity: 1; filter: blur(0); }
  to { opacity: 0; filter: blur(20px); }
}

/* 4. Flicker Out (reverse of Flicker) */
.overlay.docked .outro-flicker .word {
  animation: o-flicker 1s ease forwards !important;
}
@keyframes o-flicker {
  0%   { opacity: 1; }
  10%  { opacity: 0.8; }
  20%  { opacity: 0.1; }
  30%  { opacity: 0.9; }
  40%  { opacity: 0; }
  50%  { opacity: 0.7; }
  60%  { opacity: 0.2; }
  70%  { opacity: 0.9; }
  80%  { opacity: 0.1; }
  90%  { opacity: 0.4; }
  100% { opacity: 0; }
}

/* 5. Float Up (reverse of Drop Down) */
.overlay.docked .outro-float-up .word {
  animation: o-float-up 0.8s var(--ease-out-expo) forwards !important;
}
@keyframes o-float-up {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-60px); }
}

/* ---- Reduced Motion ---- */

@media (prefers-reduced-motion: reduce) {
  .word {
    animation: none;
    transform: none;
  }

  .tagline {
    animation: none;
    opacity: 1;
    transform: none;
  }

  #flow-field {
    opacity: 0.3;
  }
}

/* ---- Selection ---- */

::selection {
  background: rgba(240, 237, 232, 0.15);
  color: var(--fg);
}