/* ============================================================
   rainsday.com — V2 edition 03 · cobalt mono
   Bold modernist single cover · Behance-style layout
   ============================================================ */

:root {
  color-scheme: light;
  --paper: #FAFAF7;
  --paper-warm: #F2F3F1;
  --ink: #0A0A0C;
  --ink-soft: #1F2229;
  --muted: #6E727A;
  --rule: rgba(10, 10, 12, 0.12);
  --rule-soft: rgba(10, 10, 12, 0.06);
  --cobalt: #0042D4;
  --cobalt-deep: #002A8A;
  --cobalt-glow: #4A7BFF;
  --cobalt-soft: #DCE6FF;

  --sans: "Inter", "Helvetica Neue", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --gutter: clamp(24px, 4vw, 64px);
  --frame: clamp(12px, 1.4vw, 22px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.005em;
  cursor: none;
  overflow-x: hidden;
}

::selection { background: var(--cobalt); color: #fff; }

a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }
em { font-style: italic; }
sup { font-size: 0.46em; vertical-align: super; font-weight: 600; }

button {
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  cursor: none;
  padding: 0;
}

/* ============================================================
   Custom cursor — small electric dot + ring
   ============================================================ */
.cursor {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
}
.cursor-dot, .cursor-ring {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  will-change: transform;
}
.cursor-dot {
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 999px;
  background: var(--cobalt);
}
.cursor-ring {
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  border: 1px solid var(--cobalt);
  border-radius: 999px;
  transition: width 220ms ease, height 220ms ease, margin 220ms ease,
    background 220ms ease, transform 80ms linear;
}
.cursor.is-pointer .cursor-ring {
  width: 50px;
  height: 50px;
  margin: -25px 0 0 -25px;
  background: rgba(0, 66, 212, 0.08);
}
.cursor.is-pointer .cursor-dot { background: #fff; mix-blend-mode: difference; }
@media (hover: none), (pointer: coarse) {
  body { cursor: auto; }
  .cursor { display: none; }
}

/* ============================================================
   Frame — floating browser-window backdrop
   ============================================================ */
.frame {
  position: relative;
  width: 100%;
  min-height: 100svh;
  padding: var(--frame);
  background:
    radial-gradient(ellipse at 70% 30%, rgba(74, 123, 255, 0.10), transparent 60%),
    linear-gradient(135deg, #0A0E1A 0%, #050608 100%);
}

/* ============================================================
   Top nav strip — Behance signature minimal
   ============================================================ */
.nav {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 16px clamp(20px, 3vw, 32px);
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--paper);
  margin-bottom: var(--frame);
}

.nav-left, .nav-right {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}
.nav-right { justify-self: end; }

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-weight: 800;
  font-size: 0.96rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.logo-dot {
  display: block;
  width: 10px;
  height: 10px;
  background: var(--cobalt);
  border-radius: 999px;
}
.logo-text { line-height: 1; }

.nav-menu {
  display: grid;
  gap: 4px;
  padding: 10px;
  border-radius: 4px;
  transition: background 200ms ease;
}
.nav-menu span {
  display: block;
  width: 16px;
  height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
}
.nav-menu span:nth-child(2) { width: 10px; }
.nav-menu span:nth-child(3) { width: 14px; }
.nav-menu:hover { background: var(--paper-warm); }

.nav-center {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.nav-crumb.num { color: var(--cobalt); font-weight: 600; }

.nav-version {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color 200ms ease, border-color 200ms ease;
}
.nav-version:hover { color: var(--ink); border-color: var(--ink); }
.arrow { font-size: 0.85em; }

.nav-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  color: var(--ink);
  transition: background 200ms ease;
}
.nav-icon:hover { background: var(--paper-warm); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: -0.005em;
  transition: background 240ms ease;
}
.nav-cta:hover { background: var(--cobalt); }

/* ============================================================
   Side rail — vertical version index
   ============================================================ */
.side-rail {
  position: absolute;
  top: calc(80px + var(--frame));
  right: calc(var(--frame) + 14px);
  z-index: 5;
  display: grid;
  gap: 14px;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  pointer-events: none;
}
.side-rail .rail-dot {
  width: 6px;
  height: 6px;
  background: var(--cobalt);
  border-radius: 999px;
  margin-bottom: 6px;
}
.side-rail .active {
  color: var(--paper);
  font-weight: 700;
  padding: 4px 6px;
  background: var(--cobalt);
  border-radius: 4px;
}
.side-rail .rail-line {
  width: 1px;
  height: 70px;
  background: var(--rule);
  margin-top: 8px;
  justify-self: center;
}

/* ============================================================
   Cover (main hero)
   ============================================================ */
.cover {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: clamp(28px, 4vw, 64px);
  min-height: calc(100svh - var(--frame) * 2 - 80px);
  padding: clamp(40px, 6vh, 96px) clamp(28px, 5vw, 80px) clamp(80px, 10vh, 120px);
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  overflow: hidden;
}

.cover::before {
  /* large cobalt blob behind subject */
  content: "";
  position: absolute;
  z-index: 0;
  right: -10%;
  top: 40%;
  width: 80%;
  height: 120%;
  background: radial-gradient(circle at 50% 50%, var(--cobalt-soft), transparent 60%);
  filter: blur(20px);
  pointer-events: none;
}
.cover::after {
  /* hairline grid */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 10, 12, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 10, 12, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   Left — copy
   ============================================================ */
.cover-copy {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 28px;
  align-content: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding: 6px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--paper);
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  background: var(--cobalt);
  border-radius: 999px;
  animation: dot-pulse 1.8s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.4); }
}

.cover-title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(4.4rem, 11vw, 11.5rem);
  line-height: 0.86;
  letter-spacing: -0.06em;
  color: var(--ink);
}
.cover-title sup {
  font-family: var(--mono);
  font-size: 0.22em;
  font-weight: 500;
  color: var(--cobalt);
  vertical-align: super;
  margin-left: 0.1em;
  letter-spacing: 0.05em;
}

.cover-lede {
  margin: 0;
  max-width: 38ch;
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(1.02rem, 1.3vw, 1.18rem);
  line-height: 1.5;
  color: var(--ink-soft);
}
.cover-lede em {
  font-style: italic;
  color: var(--cobalt);
  font-weight: 500;
}

.cover-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* ============================================================
   Buttons
   ============================================================ */
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.005em;
  transition: transform 360ms cubic-bezier(0.16, 1, 0.3, 1),
    background 240ms ease, color 240ms ease, border-color 240ms ease;
  will-change: transform;
}
.button.primary {
  background: var(--cobalt);
  color: #fff;
  border: 1px solid var(--cobalt);
}
.button.primary:hover {
  background: var(--cobalt-deep);
  border-color: var(--cobalt-deep);
}
.button.ghost {
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
}
.button.ghost:hover {
  border-color: var(--ink);
}
.btn-arrow {
  display: inline-block;
  transition: transform 320ms cubic-bezier(0.16, 1, 0.3, 1);
}
.button:hover .btn-arrow { transform: translateX(5px); }

/* ============================================================
   Right — subject (animated Remotion blob)
   ============================================================ */
.subject {
  position: relative;
  z-index: 1;
  aspect-ratio: 1 / 1.05;
  width: 100%;
  max-width: min(640px, 50vw);
  justify-self: end;
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  transition: transform 380ms cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
}

.subject-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.subject-rings {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}
.subject-rings span {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  mix-blend-mode: overlay;
}
.subject-rings span:nth-child(1) { width: 40%; height: 40%; }
.subject-rings span:nth-child(2) { width: 60%; height: 60%; border-style: dashed; }
.subject-rings span:nth-child(3) { width: 88%; height: 88%; }

.subject-frame {
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  pointer-events: none;
}

.subject-tag {
  position: absolute;
  left: 18px;
  bottom: 18px;
  right: 18px;
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}
.tag-row {
  display: grid;
  grid-template-columns: 64px 12px 1fr;
  gap: 8px;
  align-items: baseline;
}
.tag-row em {
  font-family: var(--mono);
  font-style: normal;
  color: var(--cobalt-glow);
  text-transform: uppercase;
  font-size: 0.66rem;
}
.tag-row span { color: rgba(255, 255, 255, 0.3); }
.tag-row strong {
  font-weight: 600;
  text-transform: uppercase;
  color: var(--paper);
}

/* ============================================================
   Floating tags (Behance scatter)
   ============================================================ */
.float-tag {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.float-tag .tag-num { color: var(--cobalt); font-weight: 600; }
.float-tag .tag-val { font-weight: 500; }
.tag-top-right { top: 48px; right: clamp(80px, 10vw, 140px); }
.tag-mid-left { bottom: 220px; left: clamp(28px, 5vw, 80px); }

/* ============================================================
   Bottom meta strip
   ============================================================ */
.meta-strip {
  position: absolute;
  z-index: 2;
  left: clamp(28px, 5vw, 80px);
  right: clamp(28px, 5vw, 80px);
  bottom: clamp(20px, 4vh, 40px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 32px);
  padding-top: 22px;
  border-top: 1px solid var(--rule);
}
.meta-item {
  display: grid;
  gap: 4px;
}
.meta-key {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.meta-val {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--ink);
}
.meta-val.link {
  color: var(--cobalt);
  border-bottom: 1px solid currentColor;
  width: fit-content;
}

/* ============================================================
   Scroll hint
   ============================================================ */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 8px;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  z-index: 4;
  animation: scroll-bob 2.4s ease-in-out infinite;
}
.scroll-rule {
  width: 32px;
  height: 1px;
  background: var(--ink);
}
@keyframes scroll-bob {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.7; }
  50% { transform: translate(-50%, 5px); opacity: 1; }
}

/* ============================================================
   Below-the-fold ribbon (about)
   ============================================================ */
.ribbon {
  position: relative;
  margin-top: var(--frame);
  padding: clamp(48px, 9vh, 96px) clamp(28px, 5vw, 80px);
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
}

.ribbon-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: clamp(20px, 4vw, 56px);
  align-items: start;
  padding-bottom: clamp(36px, 6vh, 64px);
  border-bottom: 1px solid var(--rule);
  margin-bottom: clamp(24px, 4vh, 48px);
}
.ribbon-num {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 8px;
}

.ribbon h2 {
  margin: 0 0 22px;
  display: grid;
  gap: 18px;
}
.ribbon-num-large {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(3.4rem, 7vw, 6rem);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--ink);
}
.ribbon-num-large span { color: var(--cobalt); }
.ribbon-headline {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(1.4rem, 2.4vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 30ch;
}
.ribbon-headline em {
  font-style: italic;
  color: var(--muted);
  font-weight: 400;
}

.ribbon p {
  margin: 0;
  max-width: 60ch;
  font-family: var(--sans);
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--ink-soft);
}
.ribbon p a {
  color: var(--cobalt);
  border-bottom: 1px solid currentColor;
  font-weight: 500;
}

.ribbon-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.ribbon-foot a {
  color: var(--ink);
  border-bottom: 1px solid currentColor;
}
.ribbon-foot a:hover { color: var(--cobalt); }
.ribbon-foot .rule {
  flex: 0 0 24px;
  height: 1px;
  background: var(--rule);
}

/* ============================================================
   Reveal animations
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 800ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].is-revealed { opacity: 1; transform: translateY(0); }

.reveal-line {
  display: block;
  overflow: hidden;
  line-height: 1;
}
.reveal-line > span {
  display: inline-block;
  transform: translateY(105%);
  transition: transform 1000ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}
[data-reveal-stagger].is-revealed .reveal-line:nth-child(1) > span { transition-delay: 0ms; transform: translateY(0); }
[data-reveal-stagger].is-revealed .reveal-line:nth-child(2) > span { transition-delay: 160ms; transform: translateY(0); }
[data-reveal-stagger].is-revealed .reveal-line:nth-child(3) > span { transition-delay: 320ms; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1000px) {
  .nav-center { display: none; }
  .cover { grid-template-columns: 1fr; gap: 36px; padding-top: 40px; padding-bottom: 200px; }
  .subject {
    max-width: min(420px, 80vw);
    justify-self: center;
    order: 2;
  }
  .float-tag.tag-top-right { display: none; }
  .float-tag.tag-mid-left { bottom: 280px; }
  .side-rail { display: none; }
  .meta-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 20px;
  }
}

@media (max-width: 620px) {
  .nav { padding: 12px 14px; }
  .nav-version, .nav-icon { display: none; }
  .nav-cta { padding: 8px 12px; font-size: 0.78rem; }
  .cover-title { font-size: clamp(3.4rem, 18vw, 5.4rem); }
  .float-tag { font-size: 0.62rem; padding: 6px 10px; }
  .meta-strip { grid-template-columns: 1fr 1fr; bottom: 16px; padding-top: 14px; }
  .meta-val { font-size: 0.86rem; }
  .ribbon-grid { grid-template-columns: 1fr; gap: 18px; }
  .ribbon-num-large { font-size: clamp(3rem, 16vw, 4.2rem); }
  .ribbon-headline { font-size: 1.2rem; }
  .scroll-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  body { cursor: auto; }
  .cursor { display: none; }
  [data-reveal], .reveal-line > span {
    opacity: 1 !important;
    transform: none !important;
  }
}