/* ═══════════════════════════════════════════════════════════
   Hydra — Smart Water Bottle · product launch deck
   Aqua theme · Fraunces + Work Sans + IBM Plex Mono
   ═══════════════════════════════════════════════════════════ */

:root {
  --aqua: #2E9E96;
  --aqua-bright: #5FD4C8;
  --aqua-deep: #1B6E68;
  --navy: #0B2233;
  --navy-2: #0F2C42;
  --ink: #12232B;
  --ink-soft: #45606B;
  --muted: #7C97A0;
  --line: #CBE0E0;
  --paper: #F4FAFB;
  --paper-2: #E8F3F3;
  --white: #FBFFFE;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Work Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --pad: clamp(1.6rem, 5vw, 4.5rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
::selection { background: var(--aqua); color: #fff; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--aqua-deep); outline-offset: 3px; border-radius: 4px; }
img { display: block; max-width: 100%; }

/* ═══════════ deck & slides ═══════════ */
.deck { position: fixed; inset: 0; }
.slide {
  position: absolute; inset: 0;
  opacity: 0; visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease), visibility 0s linear 0.55s;
  overflow: hidden;
  display: flex; align-items: center;
  background: var(--paper);
}
.slide.active {
  opacity: 1; visibility: visible;
  transform: translateY(0);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease), visibility 0s;
}
.slide-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(4.2rem, 9vh, 6.5rem) var(--pad) clamp(3.4rem, 7vh, 5rem);
  position: relative;
  z-index: 2;
}

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.slide.active [data-reveal] { opacity: 1; transform: translateY(0); }
.slide.active [data-reveal="1"] { transition-delay: 0.10s; }
.slide.active [data-reveal="2"] { transition-delay: 0.18s; }
.slide.active [data-reveal="3"] { transition-delay: 0.26s; }
.slide.active [data-reveal="4"] { transition-delay: 0.34s; }
.slide.active [data-reveal="5"] { transition-delay: 0.42s; }
.slide.active [data-reveal="6"] { transition-delay: 0.50s; }
.slide.active [data-reveal="7"] { transition-delay: 0.58s; }

/* typography */
.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--aqua-deep);
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.7rem;
}
.kicker::before { content: ''; width: 30px; height: 1px; background: var(--aqua); }
.kicker-light { color: var(--aqua-bright); }
.kicker-light::before { background: var(--aqua-bright); }
.s-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-bottom: 1.6rem;
}
.s-head h2 em { font-style: italic; color: var(--aqua-deep); font-weight: 400; }
.s-note { margin-top: 1.6rem; font-size: 0.95rem; color: var(--ink-soft); max-width: 66ch; }
.s-note strong { color: var(--ink); }
.s-note-light { color: rgba(251, 255, 254, 0.75); }

/* ═══════════ COVER ═══════════ */
.cover { background: var(--navy); }
.cover-media { position: absolute; inset: 0; }
.cover-media img { width: 100%; height: 100%; object-fit: cover; object-position: 72% center; }
.cover-scrim {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(8, 26, 40, 0.94) 0%, rgba(8, 26, 40, 0.82) 34%, rgba(8, 26, 40, 0.4) 62%, rgba(8, 26, 40, 0.06) 100%);
}
.cover-inner { display: flex; flex-direction: column; justify-content: space-between; min-height: 100%; color: var(--white); }
.cover-top { display: flex; align-items: center; gap: 1rem; padding-bottom: 1rem; }
.brand-word { font-family: var(--font-display); font-size: 1.2rem; font-weight: 500; letter-spacing: 0.02em; }
.mark { width: 46px; height: 46px; flex: none; }
.cover-body { max-width: 660px; }
.cover-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.9rem, 7.5vw, 5.8rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 1.4rem;
}
.cover-title em { font-style: italic; color: var(--aqua-bright); font-weight: 400; }
.cover-sub { font-size: clamp(1.05rem, 1.6vw, 1.3rem); line-height: 1.6; color: rgba(251, 255, 254, 0.85); max-width: 54ch; margin-bottom: 2.2rem; }
.cover-cta { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-body); font-weight: 600;
  font-size: 1rem; text-decoration: none;
  border-radius: 999px; padding: 0.95rem 1.7rem;
  cursor: pointer; border: 1px solid transparent;
  transition: transform 0.3s var(--ease), background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}
.btn svg { width: 18px; height: 18px; }
.btn:hover { transform: translateY(-2px); }
.btn-aqua { background: var(--aqua); color: var(--white); box-shadow: 0 18px 40px -20px rgba(46, 158, 150, 0.8); }
.btn-aqua:hover { background: var(--aqua-bright); color: var(--navy); }
.cover-meta { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(251, 255, 254, 0.6); }
.cover-foot {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: rgba(251, 255, 254, 0.55);
  padding-top: 1.2rem; border-top: 1px solid rgba(251, 255, 254, 0.16);
}
.slide.active .cover-title { animation: coverUp 0.9s var(--ease) 0.15s both; }
.slide.active .cover-sub { animation: coverUp 0.9s var(--ease) 0.3s both; }
.slide.active .cover-cta { animation: coverUp 0.9s var(--ease) 0.45s both; }
@keyframes coverUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }

/* ═══════════ big numbers ═══════════ */
.big-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
.big-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--aqua);
  border-radius: 14px;
  padding: 1.5rem 1.4rem 1.3rem;
  display: flex; flex-direction: column; gap: 0.8rem;
  transition: transform 0.35s var(--ease), box-shadow 0.35s ease;
}
.big-card:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(18, 35, 43, 0.45); }
.big-num {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--aqua-deep);
  line-height: 1;
  display: flex; align-items: baseline; gap: 0.35rem;
}
.big-num .unit { font-size: 0.5em; font-weight: 500; color: var(--aqua); font-family: var(--font-body); letter-spacing: 0; }
.big-label { font-size: 0.92rem; color: var(--ink-soft); line-height: 1.5; }
.big-card-dark {
  background: rgba(251, 255, 254, 0.07);
  border: 1px solid rgba(251, 255, 254, 0.18);
  border-top: 3px solid var(--aqua-bright);
}
.big-card-dark .big-num { color: var(--aqua-bright); }
.big-card-dark .big-num .unit { color: rgba(251, 255, 254, 0.8); }
.big-card-dark .big-label { color: rgba(251, 255, 254, 0.8); }

.big-inline {
  font-family: var(--font-display); font-weight: 600; font-size: 2.6rem;
  color: var(--aqua-deep); line-height: 1; display: flex; align-items: baseline; gap: 0.1rem;
}

/* ═══════════ objectives grid (shared) ═══════════ */
.obj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.obj-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem 1.4rem;
  display: flex; flex-direction: column; gap: 0.7rem;
  transition: transform 0.35s var(--ease), box-shadow 0.35s ease;
}
.obj-card:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(18, 35, 43, 0.45); }
.obj-card-wide { grid-column: span 2; display: grid; grid-template-columns: auto 1fr; gap: 1.2rem; align-items: center; }
.obj-card-wide > div { display: flex; flex-direction: column; gap: 0.4rem; }
.ic { width: 26px; height: 26px; color: var(--aqua-deep); flex: none; }
.obj-card h3 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; }
.obj-card p { font-size: 0.94rem; color: var(--ink-soft); flex: 1; }
.obj-tag { font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--aqua-deep); }

/* ═══════════ split ═══════════ */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split-copy { min-width: 0; }
.split-copy-r { display: flex; flex-direction: column; gap: 1.2rem; }

/* navy slides */
.slide-navy { background: var(--navy); color: var(--white); }
.slide-navy .s-head h2 { color: var(--white); }
.slide-navy .s-head h2 em { color: var(--aqua-bright); }
.slide-green { background: var(--aqua-deep); color: var(--white); }
.slide-green .s-head h2 { color: var(--white); }

/* ═══════════ features ═══════════ */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.feat-card {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.5rem 1.4rem; display: flex; flex-direction: column; gap: 0.7rem;
  transition: transform 0.35s var(--ease), box-shadow 0.35s ease;
}
.feat-card:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(18, 35, 43, 0.45); }
.feat-card-wide { grid-column: span 3; flex-direction: row; align-items: center; }
.feat-card-wide .ic { width: 32px; height: 32px; }
.feat-card h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; }
.feat-card p { font-size: 0.92rem; color: var(--ink-soft); flex: 1; }
.feat-card-wide p { flex: 1; max-width: 60ch; }

/* ═══════════ why list ═══════════ */
.why-list { list-style: none; display: flex; flex-direction: column; gap: 1rem; margin-top: 0.6rem; }
.why-list li { display: flex; gap: 1.1rem; align-items: flex-start; }
.why-y {
  font-family: var(--font-display); font-weight: 600; font-size: 1.5rem;
  color: var(--aqua-deep); flex: none; width: 6ch;
}
.why-list p { font-size: 0.95rem; color: var(--ink-soft); }
.why-list strong { color: var(--ink); display: block; }

/* ═══════════ phone mock ═══════════ */
.phone {
  position: relative; width: 250px; margin: 0 auto;
  background: #0E2838; border-radius: 36px;
  border: 6px solid #0A1F2E; box-shadow: 0 30px 60px -30px rgba(8, 26, 40, 0.7);
  padding: 2.4rem 1.1rem 1.3rem;
}
.phone-notch {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%);
  width: 84px; height: 20px; background: #0A1F2E; border-radius: 999px;
}
.phone-time {
  position: absolute; top: 14px; left: 0; right: 0; text-align: center;
  font-family: var(--font-mono); font-size: 0.6rem; color: rgba(251, 255, 254, 0.6);
  letter-spacing: 0.06em;
}
.phone-body { display: flex; flex-direction: column; align-items: center; gap: 0.8rem; }
.phone-ring-wrap { position: relative; width: 140px; height: 140px; }
.phone-ring { width: 100%; height: 100%; }
.ring-fill {
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
}
.slide.active .ring-fill { animation: ringFill 1.6s var(--ease) 0.7s forwards; }
@keyframes ringFill { to { stroke-dashoffset: 196; } }
.phone-ring-center {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; color: var(--white);
}
.phone-ring-center .pct { font-family: var(--font-display); font-size: 1.9rem; font-weight: 600; line-height: 1; }
.phone-ring-center .pct-u { font-family: var(--font-mono); font-size: 0.56rem; color: rgba(251, 255, 254, 0.7); letter-spacing: 0.08em; margin-top: 0.2rem; }
.phone-label { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--aqua-bright); }
.phone-notif {
  width: 100%; display: flex; gap: 0.5rem; align-items: flex-start;
  background: rgba(251, 255, 254, 0.08); border: 1px solid rgba(251, 255, 254, 0.16);
  border-radius: 12px; padding: 0.55rem 0.7rem;
}
.ic-xs { width: 15px; height: 15px; color: var(--aqua-bright); margin-top: 0.15rem; }
.phone-notif span { font-size: 0.66rem; line-height: 1.4; color: rgba(251, 255, 254, 0.85); }
.phone-notif strong { color: var(--white); font-weight: 600; }
.phone-streak {
  width: 100%; display: flex; align-items: center; gap: 0.8rem;
  background: rgba(46, 158, 150, 0.18); border-radius: 12px; padding: 0.55rem 0.7rem;
}
.streak-n { font-family: var(--font-display); font-size: 1.6rem; font-weight: 600; color: var(--aqua-bright); line-height: 1; }
.streak-l { font-family: var(--font-mono); font-size: 0.55rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(251, 255, 254, 0.75); line-height: 1.4; }

/* ═══════════ charts ═══════════ */
.split-fig { min-width: 0; }
.fig-caption {
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.6rem;
}
.chart { width: 100%; height: auto; display: block; }
.chart .ax { font-family: var(--font-mono); font-size: 11px; fill: var(--muted); }
.split-fig-img img {
  border-radius: 16px;
  box-shadow: 0 30px 60px -34px rgba(8, 26, 40, 0.55);
  aspect-ratio: 4 / 3; object-fit: cover; width: 100%;
}
.split-fig-img .fig-caption { margin-top: 0.6rem; margin-bottom: 0; }

/* ═══════════ specs ═══════════ */
.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.spec {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.1rem 1.2rem; display: flex; flex-direction: column; gap: 0.3rem;
}
.spec-n { font-family: var(--font-display); font-weight: 600; font-size: 1.5rem; color: var(--aqua-deep); line-height: 1.1; }
.spec-n small { font-size: 0.5em; color: var(--aqua); font-weight: 500; }
.spec-l { font-size: 0.84rem; color: var(--ink-soft); }
.spec-light {
  background: rgba(251, 255, 254, 0.07);
  border: 1px solid rgba(251, 255, 254, 0.18);
}
.spec-light .spec-n { color: var(--aqua-bright); }
.spec-light .spec-n small { color: rgba(251, 255, 254, 0.7); }
.spec-light .spec-l { color: rgba(251, 255, 254, 0.8); }

/* ═══════════ day list ═══════════ */
.day-list { display: flex; flex-direction: column; gap: 0.9rem; margin-top: 0.4rem; }
.day-row {
  display: flex; gap: 1.2rem; align-items: baseline;
  border-bottom: 1px dashed var(--line); padding-bottom: 0.8rem;
}
.day-t {
  font-family: var(--font-mono); font-weight: 500; font-size: 0.95rem;
  color: var(--aqua-deep); flex: none; width: 4.6ch;
}
.day-row p { font-size: 0.95rem; color: var(--ink-soft); }
.day-row strong { color: var(--ink); }

/* ═══════════ environmental ═══════════ */
.env-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
.env-card {
  background: rgba(251, 255, 254, 0.07);
  border: 1px solid rgba(251, 255, 254, 0.18);
  border-top: 3px solid var(--aqua-bright);
  border-radius: 14px; padding: 1.4rem 1.3rem;
  display: flex; flex-direction: column; gap: 0.7rem;
}
.env-n {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  color: var(--aqua-bright); line-height: 1; display: flex; align-items: baseline; gap: 0.4rem;
}
.env-n .unit { font-size: 0.5em; color: rgba(251, 255, 254, 0.85); font-family: var(--font-body); font-weight: 400; }
.env-l { font-size: 0.88rem; color: rgba(251, 255, 254, 0.8); line-height: 1.55; }
.env-note {
  margin-top: 1.5rem; display: flex; gap: 1rem; align-items: flex-start;
  background: rgba(251, 255, 254, 0.08); border-radius: 12px; padding: 1.1rem 1.3rem;
}
.env-note .ic { color: var(--aqua-bright); margin-top: 0.2rem; }
.env-note p { font-size: 0.95rem; color: rgba(251, 255, 254, 0.85); max-width: 78ch; }

/* ═══════════ risk table ═══════════ */
.risk-table {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
}
.risk-row {
  display: grid; grid-template-columns: 1fr 1.6fr; gap: 1.4rem;
  padding: 1.05rem 1.4rem; border-bottom: 1px solid var(--line); align-items: center;
}
.risk-row:last-child { border-bottom: none; }
.risk-head {
  background: var(--navy); color: var(--white);
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.18em; text-transform: uppercase;
  padding: 0.7rem 1.4rem;
}
.risk-row > span:first-child { display: flex; align-items: center; gap: 0.7rem; font-weight: 600; font-size: 0.98rem; }
.risk-row .ic { width: 22px; height: 22px; color: var(--aqua-deep); }
.risk-row > span:last-child { font-size: 0.92rem; color: var(--ink-soft); }

/* ═══════════ pricing ═══════════ */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; align-items: stretch; }
.price-card {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 16px;
  padding: 1.6rem 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; position: relative;
  transition: transform 0.35s var(--ease), box-shadow 0.35s ease;
}
.price-card:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(18, 35, 43, 0.5); }
.price-featured {
  background: var(--navy); color: var(--white);
  border-color: var(--navy);
  transform: scale(1.03);
}
.price-tag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--aqua); color: #fff; font-family: var(--font-mono);
  font-size: 0.58rem; letter-spacing: 0.14em; text-transform: uppercase;
  border-radius: 999px; padding: 0.3rem 0.9rem; white-space: nowrap;
}
.price-name { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; }
.price-val { font-family: var(--font-display); font-size: 2.6rem; font-weight: 600; line-height: 1; color: var(--aqua-deep); }
.price-featured .price-val { color: var(--aqua-bright); }
.price-what { font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.price-featured .price-what { color: rgba(251, 255, 254, 0.7); }
.price-card ul { list-style: none; margin-top: 0.6rem; display: flex; flex-direction: column; gap: 0.4rem; }
.price-card li {
  font-size: 0.86rem; color: var(--ink-soft); padding-left: 1.2rem; position: relative;
}
.price-card li::before { content: '✓'; position: absolute; left: 0; color: var(--aqua); font-weight: 600; }
.price-featured li { color: rgba(251, 255, 254, 0.82); }
.price-featured li::before { color: var(--aqua-bright); }
.price-note {
  margin-top: 1.4rem; text-align: center; font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.08em; color: var(--muted);
}

/* ═══════════ close ═══════════ */
.slide-close { background: var(--navy); color: var(--white); }
.close-inner { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 1.1rem; max-width: 860px; }
.mark-lg { width: 74px; height: 74px; }
.close-title {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(2.4rem, 5.6vw, 4rem); line-height: 1.05; letter-spacing: -0.02em;
}
.close-title em { font-style: italic; color: var(--aqua-bright); font-weight: 400; }
.close-sub { font-size: 1.08rem; color: rgba(251, 255, 254, 0.82); max-width: 58ch; line-height: 1.65; }
.close-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.9rem; margin-top: 0.8rem; width: 100%; }
.cstep {
  background: rgba(251, 255, 254, 0.07); border: 1px solid rgba(251, 255, 254, 0.16);
  border-radius: 12px; padding: 1rem 1.1rem; text-align: left;
}
.cstep-n { font-family: var(--font-mono); font-size: 0.66rem; color: var(--aqua-bright); letter-spacing: 0.14em; }
.cstep p { font-size: 0.88rem; color: rgba(251, 255, 254, 0.85); margin-top: 0.3rem; }
.cstep strong { color: var(--white); }
.close-contact {
  margin-top: 1.4rem; font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.08em; color: rgba(251, 255, 254, 0.55);
}
.close-contact a { color: var(--aqua-bright); }

/* ═══════════ deck ui ═══════════ */
.deck-ui {
  position: fixed; left: 0; right: 0; bottom: 1.2rem; z-index: 100;
  display: flex; align-items: center; justify-content: center; gap: 1.1rem;
  padding: 0 1rem; pointer-events: none;
}
.deck-ui > * { pointer-events: auto; }
.nav-btn {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(244, 250, 251, 0.9);
  color: var(--ink); cursor: pointer;
  display: grid; place-items: center;
  transition: background 0.25s ease, color 0.25s ease, transform 0.2s var(--ease);
}
.nav-btn svg { width: 20px; height: 20px; }
.nav-btn:hover { background: var(--aqua); color: #fff; border-color: var(--aqua); transform: translateY(-2px); }
.nav-btn-ghost { background: transparent; border-color: var(--line); }
.dots { display: flex; gap: 0.42rem; align-items: center; }
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--line); border: none; cursor: pointer; padding: 0;
  transition: background 0.25s ease, transform 0.25s var(--ease);
}
.dot:hover { background: var(--aqua); }
.dot.on { background: var(--aqua-deep); transform: scale(1.35); }
.counter {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em;
  color: var(--ink-soft); min-width: 6ch; text-align: center;
}
.key-hint {
  position: fixed; right: 1.1rem; bottom: 1.4rem; z-index: 99;
  font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted);
}
.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%; z-index: 200;
  background: linear-gradient(90deg, var(--aqua-deep), var(--aqua-bright));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease);
}

/* ═══════════ responsive ═══════════ */
@media (max-width: 1020px) {
  .big-grid { grid-template-columns: repeat(2, 1fr); }
  .obj-grid { grid-template-columns: repeat(2, 1fr); }
  .obj-card-wide { grid-column: span 2; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .feat-card-wide { grid-column: span 2; }
  .env-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: 1fr 1fr; }
  .price-card:last-child { grid-column: span 2; }
  .split { grid-template-columns: 1fr; gap: 1.6rem; overflow-y: auto; }
  .close-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  .big-grid { grid-template-columns: 1fr 1fr; }
  .big-num { font-size: 1.9rem; }
  .obj-grid { grid-template-columns: 1fr; }
  .obj-card-wide { grid-column: span 1; grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr; }
  .feat-card-wide { grid-column: span 1; flex-direction: column; }
  .spec-grid { grid-template-columns: 1fr; }
  .env-grid { grid-template-columns: 1fr 1fr; }
  .env-n { font-size: 1.7rem; }
  .price-grid { grid-template-columns: 1fr; }
  .price-card:last-child { grid-column: span 1; }
  .risk-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .close-steps { grid-template-columns: 1fr; }
  .cover-scrim { background: linear-gradient(180deg, rgba(8,26,40,0.92) 0%, rgba(8,26,40,0.85) 55%, rgba(8,26,40,0.5) 100%); }
  .deck-ui { bottom: 0.8rem; gap: 0.8rem; }
  .key-hint { display: none; }
  .cover-foot span:first-child { display: none; }
}

@media (max-width: 480px) {
  .big-grid { grid-template-columns: 1fr; }
  .env-grid { grid-template-columns: 1fr; }
  .close-steps { grid-template-columns: 1fr; }
}

/* ═══════════ reduced motion ═══════════ */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .slide { transition: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .ring-fill { stroke-dashoffset: 196; }
}