/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.95rem 1.6rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.btn__arrow {
  width: 16px;
  height: 1px;
  background: currentColor;
  position: relative;
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn__arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ===== Cards ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
  transition: border-color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.card:hover {
  border-color: var(--color-border-strong);
  background: rgba(20, 32, 56, 0.65);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    400px circle at var(--mx, 50%) var(--my, 50%),
    rgba(125, 224, 255, 0.10),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
}

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

.card__index {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-dim);
  text-transform: uppercase;
}

.card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-regular);
  letter-spacing: var(--tracking-snug);
  color: var(--color-text);
}

.card__body {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

.card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
}

.card__list li {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-4);
  position: relative;
}

.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1px;
  background: var(--color-accent);
}

/* Bento variants */
.bento .card--feature {
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.18), rgba(125, 224, 255, 0.05));
  border-color: var(--color-border-strong);
}

.bento .card--accent {
  background: var(--color-bg-elev);
}

.card--mono {
  font-family: var(--font-mono);
}

/* ===== Pillar item ===== */
.pillar__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-dim);
  text-transform: uppercase;
}

.pillar__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  letter-spacing: var(--tracking-snug);
}

.pillar__body {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ===== 3D Hero scene (parallax layers) ===== */
.hero__scene {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  perspective: 1200px;
  transform-style: preserve-3d;
}

.scene-layer {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transition: transform var(--dur-slow) var(--ease-out);
  will-change: transform;
  pointer-events: none;
}

.scene-ring {
  position: absolute;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  aspect-ratio: 1;
}

.scene-ring--lg { width: 95%; opacity: 0.35; }
.scene-ring--md { width: 70%; opacity: 0.55; border-color: rgba(125, 224, 255, 0.25); }
.scene-ring--sm { width: 45%; opacity: 0.75; border-color: rgba(125, 224, 255, 0.4); }

.scene-core {
  position: absolute;
  width: 38%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #C8E5FF, #4F8CFF 35%, #1A2D5C 70%, #0B1530);
  box-shadow:
    0 0 80px rgba(79, 140, 255, 0.45),
    inset -20px -25px 60px rgba(0, 0, 0, 0.6),
    inset 20px 18px 60px rgba(255, 255, 255, 0.08);
}

.scene-core::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(120deg, transparent 40%, rgba(255, 255, 255, 0.10) 50%, transparent 60%);
  mix-blend-mode: overlay;
}

.scene-orbit {
  position: absolute;
  inset: 0;
}

.scene-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 16px rgba(125, 224, 255, 0.8);
}

.scene-dot--1 { top: 8%;  left: 50%; transform: translateX(-50%); }
.scene-dot--2 { top: 50%; right: 4%; transform: translateY(-50%); width: 6px; height: 6px; }
.scene-dot--3 { bottom: 12%; left: 18%; width: 5px; height: 5px; opacity: 0.7; }
.scene-dot--4 { top: 22%; left: 12%; width: 4px; height: 4px; opacity: 0.6; }

.scene-grid-floor {
  position: absolute;
  bottom: -8%;
  left: 50%;
  transform: translateX(-50%) rotateX(70deg);
  transform-origin: center top;
  width: 140%;
  height: 60%;
  background-image:
    linear-gradient(to right, rgba(125, 224, 255, 0.18) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(125, 224, 255, 0.18) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 0%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 0%, black, transparent 80%);
  opacity: 0.55;
}

.scene-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-dim);
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: rgba(11, 18, 34, 0.7);
  backdrop-filter: blur(6px);
}

.scene-tag--1 { top: 6%; left: -2%; }
.scene-tag--2 { bottom: 18%; right: -4%; color: var(--color-accent); border-color: rgba(125, 224, 255, 0.35); }

/* ===== Cursor ===== */
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 140, 255, 0.18), rgba(125, 224, 255, 0.06) 40%, transparent 70%);
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}

.cursor-glow.is-active { opacity: 1; }

/* ===== Stats strip ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.stats__item {
  padding: var(--space-7) var(--space-5);
  border-right: 1px solid var(--color-border);
}

.stats__item:last-child { border-right: 0; }

.stats__value {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-light);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-3);
}

.stats__value sup {
  font-size: 0.45em;
  color: var(--color-accent);
  margin-left: 4px;
  vertical-align: top;
  top: 0.3em;
  position: relative;
}

.stats__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* ===== Process timeline ===== */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  position: relative;
}

.process::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-strong) 10%, var(--color-border-strong) 90%, transparent);
}

.process__step {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-7);
  position: relative;
}

.process__step::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1px solid var(--color-accent);
}

.process__step::after {
  content: "";
  position: absolute;
  top: 22px;
  left: 4px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent);
}

.process__index {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-dim);
}

.process__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-text);
}

.process__body {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ===== Tag list ===== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
}

.tag--accent {
  color: var(--color-accent);
  border-color: var(--color-border-strong);
  background: var(--color-accent-soft);
}

/* ===== Definition rows ===== */
.def-rows {
  display: flex;
  flex-direction: column;
}

.def-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-6);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.def-row:last-child { border-bottom: 0; }

.def-row__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-dim);
  padding-top: 0.3em;
}

.def-row__value {
  font-size: var(--fs-md);
  color: var(--color-text);
  line-height: var(--lh-snug);
}

.def-row__value a { color: var(--color-text); }
.def-row__value a:hover { color: var(--color-accent); }

/* ===== Form ===== */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.form__input,
.form__textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--fs-md);
  transition: border-color var(--dur-fast) var(--ease-out);
}

.form__input:focus,
.form__textarea:focus {
  outline: 0;
  border-bottom-color: var(--color-accent);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== CTA banner ===== */
.cta {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-7), 6vw, var(--space-9));
  background:
    radial-gradient(60% 100% at 0% 100%, rgba(79, 140, 255, 0.18), transparent 60%),
    radial-gradient(60% 100% at 100% 0%, rgba(125, 224, 255, 0.10), transparent 60%),
    var(--color-bg-elev);
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-7);
  align-items: center;
}

.cta__title {
  font-size: clamp(var(--fs-xl), 4vw, var(--fs-2xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
}

.cta__body {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  max-width: 50ch;
}

.cta__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: flex-end;
  flex-wrap: wrap;
}