/* ==========================================================================
   Valkyrie web flasher - styles
   Dark + cyan theme tuned to match the watch sprites / screenshots.
   ========================================================================== */

:root {
  /* Palette (carried over from the watch UI aesthetic) */
  --cyan: #00d9ff;
  --purple: #a855f7;
  --gold: #ffa500;
  --blue: #3b82f6;
  --green: #00ff66;
  --red: #ff4d5e;

  /* Surfaces */
  --bg: #03070d;
  --bg-2: #050d16;
  --panel: rgba(6, 15, 24, 0.82);
  --panel-solid: #08131f;
  --panel-border: rgba(0, 217, 255, 0.18);
  --panel-border-strong: rgba(0, 217, 255, 0.42);

  /* Text */
  --text: #e6f1f8;
  --text-dim: #9fb3c4;
  --text-faint: #607282;

  /* Type */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;

  /* Layout */
  --maxw: 1100px;
  --radius: 14px;
  --radius-sm: 9px;

  /* Effects */
  --glow-cyan: 0 0 24px rgba(0, 217, 255, 0.35);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.55);

  /* ESP Web Tools button theming */
  --esp-tools-button-color: var(--cyan);
  --esp-tools-button-text-color: #03121a;
  --esp-tools-button-border-radius: 999px;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(168, 85, 247, 0.14), transparent 60%),
    radial-gradient(1100px 600px at 10% 0%, rgba(0, 217, 255, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 40%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* faint scanline / grid overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 217, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 217, 255, 0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
}

a {
  color: var(--cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3 {
  line-height: 1.15;
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
  position: relative;
  z-index: 1;
}

.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.6rem;
}

.section__title {
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
}

.section__lead {
  color: var(--text-dim);
  max-width: 60ch;
  margin: 0;
}

.pixel {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* --------------------------------------------------------------------------
   Top nav
   -------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(3, 7, 13, 0.92), rgba(3, 7, 13, 0.55));
  border-bottom: 1px solid var(--panel-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.brand__sprite {
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 0 6px rgba(0, 217, 255, 0.55));
}

.brand__name {
  font-size: 1.05rem;
}

.brand__name b {
  color: var(--cyan);
}

.nav__spacer {
  flex: 1;
}

.nav__version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  border: 1px solid var(--panel-border-strong);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  white-space: nowrap;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.nav__link:hover {
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(2rem, 6vw, 3.5rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 6vw, 3.5rem);
  align-items: center;
}

.hero__title {
  font-size: clamp(2.4rem, 9vw, 4.2rem);
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #ffffff 10%, var(--cyan) 55%, var(--purple) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.4rem;
}

.hero__tag {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2.6vw, 1.05rem);
  color: var(--cyan);
  letter-spacing: 0.02em;
  margin-bottom: 1.1rem;
}

.hero__desc {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 52ch;
  margin: 0 0 1.6rem;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.4rem;
}

.btn-primary {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #03121a;
  background: linear-gradient(120deg, var(--cyan), #5ee7ff);
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.7rem;
  box-shadow: 0 8px 26px rgba(0, 217, 255, 0.32);
  transition: transform 150ms ease, box-shadow 150ms ease, filter 150ms ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 12px 34px rgba(0, 217, 255, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary svg {
  flex: 0 0 auto;
}

.btn-secondary {
  appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  color: var(--text);
  background: rgba(8, 19, 31, 0.85);
  border: 1px solid var(--panel-border-strong);
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.btn-secondary:hover {
  text-decoration: none;
  border-color: var(--cyan);
  background: rgba(0, 217, 255, 0.08);
}

.hero__note {
  margin-top: 1.3rem;
  font-size: 0.82rem;
  color: var(--text-faint);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  max-width: 46ch;
}

.hero__note svg {
  flex: 0 0 auto;
  margin-top: 0.15rem;
  color: var(--cyan);
}

/* Avoid a flash of all slotted messages before the web component upgrades */
esp-web-install-button:not(:defined) [slot="unsupported"],
esp-web-install-button:not(:defined) [slot="not-allowed"] {
  display: none;
}

/* Author display rules must not override the hidden attribute (see MDN). */
[hidden] {
  display: none !important;
}

/* ESP Web Tools messages (slotted) */
.ewt-msg {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gold);
  border: 1px solid rgba(255, 165, 0, 0.4);
  background: rgba(255, 165, 0, 0.07);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  max-width: 42ch;
}

/* --------------------------------------------------------------------------
   Watch demo (the centerpiece)
   -------------------------------------------------------------------------- */

.watch-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

.watch {
  --screen: min(248px, 72vw);
  position: relative;
  width: calc(var(--screen) + 44px);
  padding: 22px;
  border-radius: 30px;
  background:
    linear-gradient(160deg, #1a2330, #0a0f17 60%);
  border: 1px solid rgba(120, 150, 175, 0.28);
  box-shadow:
    var(--shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 0 40px rgba(0, 217, 255, 0.12);
}

/* watch side button */
.watch::after {
  content: "";
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 46px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(90deg, #2a3340, #11161e);
}

.watch__screen {
  position: relative;
  width: var(--screen);
  height: var(--screen);
  border-radius: 12px;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(0, 217, 255, 0.05), transparent 60%),
    #02060b;
  border: 1px solid rgba(0, 217, 255, 0.16);
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
}

/* status bar like the real watch */
.watch__statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0.6rem;
  font-size: 0.66rem;
  color: #cfe9f4;
  background: linear-gradient(90deg, rgba(0, 217, 255, 0.22), rgba(59, 130, 246, 0.16));
  border-bottom: 1px solid rgba(0, 217, 255, 0.18);
}

.watch__statusbar .batt {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.watch__title {
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
}

.watch__body {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.7rem 0.9rem;
  text-align: center;
}

.watch__sprite {
  width: 112px;
  height: 112px;
  object-fit: contain;
  filter: drop-shadow(0 4px 14px rgba(0, 217, 255, 0.35));
}

.watch__status-line {
  font-size: 0.78rem;
  color: #d7e7f1;
}

.watch__status-line .accent {
  color: var(--cyan);
}

.watch__hint {
  font-size: 0.64rem;
  color: var(--text-faint);
  letter-spacing: 0.03em;
}

/* state selector chips */
.state-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  max-width: 320px;
}

.chip {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-dim);
  background: rgba(8, 19, 31, 0.8);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease;
}

.chip:hover {
  color: var(--text);
  border-color: var(--panel-border-strong);
}

.chip[aria-pressed="true"] {
  color: #03121a;
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.watch-demo__caption {
  max-width: 340px;
  text-align: center;
  min-height: 3.2em;
}

.watch-demo__caption h3 {
  font-size: 1rem;
  color: var(--cyan);
  margin-bottom: 0.2rem;
}

.watch-demo__caption p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* --------------------------------------------------------------------------
   How to flash - steps
   -------------------------------------------------------------------------- */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 1.3rem 1.3rem 1.3rem 3.6rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1.1rem;
  top: 1.2rem;
  width: 1.9rem;
  height: 1.9rem;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: #03121a;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: var(--glow-cyan);
}

.step h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.step p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

/* --------------------------------------------------------------------------
   Feature cards
   -------------------------------------------------------------------------- */

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.feature {
  position: relative;
  overflow: hidden;
  padding: 1.4rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  transition: transform 180ms ease, border-color 180ms ease;
}

.feature:hover {
  transform: translateY(-3px);
  border-color: var(--panel-border-strong);
}

.feature__icon {
  width: 64px;
  height: 64px;
  margin-bottom: 0.9rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: rgba(0, 217, 255, 0.06);
  border: 1px solid var(--panel-border);
}

.feature__icon img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(0, 217, 255, 0.4));
}

.feature h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.feature p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.feature__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.8rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
}

/* --------------------------------------------------------------------------
   Wardrive log downloader
   -------------------------------------------------------------------------- */

.wardrive {
  margin-top: 2rem;
}

.wardrive__panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 1.3rem;
}

.wardrive__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.wardrive__status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-left: auto;
  text-align: right;
}

.wardrive__files {
  margin-top: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.wd-file {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem 0.8rem;
  background: rgba(8, 19, 31, 0.7);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
}

.wd-file__meta {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
  flex: 1;
}

.wd-file__name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wd-file__size {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

.wd-file__btn {
  flex: 0 0 auto;
  padding: 0.45rem 0.9rem;
  font-size: 0.78rem;
}

.wd-empty {
  margin: 0;
  color: var(--text-faint);
  font-size: 0.9rem;
}

.wardrive__console {
  margin-top: 1.2rem;
  border-top: 1px solid var(--panel-border);
  padding-top: 0.9rem;
}

.wardrive__console summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.wardrive__console summary:hover {
  color: var(--text);
}

.wardrive__log {
  margin: 0.8rem 0 0;
  max-height: 220px;
  overflow: auto;
  background: #02060b;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.55;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
}

button[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Gallery
   -------------------------------------------------------------------------- */

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin-top: 2rem;
}

.shot {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.shot__frame {
  background: #02060b;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.shot__frame img {
  width: 100%;
  max-width: 320px;
  border-radius: 10px;
  border: 1px solid rgba(0, 217, 255, 0.12);
}

.shot__cap {
  padding: 1rem 1.2rem 1.2rem;
}

.shot__cap h3 {
  font-size: 1rem;
  color: var(--cyan);
  margin-bottom: 0.25rem;
}

.shot__cap p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--panel-border);
  background: linear-gradient(180deg, transparent, rgba(0, 217, 255, 0.03));
  padding-block: clamp(2.5rem, 6vw, 3.5rem);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
}

.footer__about {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin: 0 0 0.9rem;
}

.footer h4 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.7rem;
}

.footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer li {
  color: var(--text-dim);
  font-size: 0.9rem;
  padding-block: 0.18rem;
}

.footer li::before {
  content: "› ";
  color: var(--text-faint);
}

.footer__bottom {
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--panel-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-faint);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

.sweep {
  position: relative;
  overflow: hidden;
}

.sweep::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.7;
  animation: sweep 5s linear infinite;
}

@keyframes sweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.pulse-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 12px rgba(0, 255, 102, 0.85);
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.45; transform: scale(0.82); }
  50% { opacity: 1; transform: scale(1); }
}

/* gentle float for hero / feature sprites */
.float {
  animation: float 4.5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* Only hide pre-reveal when JS is present, so no-JS users still see content */
.js .fade-in {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.js .fade-in.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .features {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .sweep::before,
  .pulse-dot,
  .float {
    animation: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}