/* --- Design System & CSS Variables --- */
:root {
  /* Color Palette - Dark Premium Theme */
  --bg-primary: hsl(224, 71%, 4%);
  --bg-secondary: hsla(224, 71%, 8%, 0.55);
  --border-glass: hsla(217, 30%, 60%, 0.15);
  --border-glass-hover: hsla(38, 92%, 50%, 0.3);
  
  /* Status/Accent Colors */
  --color-warning: hsl(38, 92%, 50%);
  --color-warning-glow: hsla(38, 92%, 50%, 0.15);
  --color-accent: hsl(263, 70%, 55%);
  --color-accent-glow: hsla(263, 70%, 55%, 0.25);
  
  /* Typography Colors */
  --text-primary: hsl(0, 0%, 98%);
  --text-muted: hsl(215, 20%, 65%);
  --text-link-hover: hsl(38, 92%, 50%);

  /* Font Families */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html, body {
  inline-size: 100%;
  block-size: 100%;
  overflow: clip; /* Avoid scrollbars on viewport boundaries */
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: grid;
  place-content: center;
  min-block-size: 100dvh;
  position: relative;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Dynamic Background Gradients --- */
body::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 30%, var(--color-accent-glow) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, var(--color-warning-glow) 0%, transparent 45%);
  z-index: 1;
  pointer-events: none;
}

body::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(hsla(0, 0%, 100%, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  z-index: 2;
  pointer-events: none;
}

/* --- Container & Layout --- */
.container {
  position: relative;
  z-index: 10;
  padding: 1.5rem;
  display: grid;
  place-items: center;
  inline-size: min(100% - 2rem, 540px);
  animation: cardEntrance 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* --- Glassmorphic Card --- */
.card {
  background: var(--bg-secondary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 24px;
  padding: 3rem 2.5rem;
  text-align: center;
  box-shadow: 
    0 4px 30px rgba(0, 0, 0, 0.4),
    0 1px 0 rgba(255, 255, 255, 0.05) inset;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  animation: float 8s ease-in-out infinite;
}

.card:hover {
  border-color: var(--border-glass-hover);
  box-shadow: 
    0 10px 40px rgba(0, 0, 0, 0.5),
    0 0 30px hsla(38, 92%, 50%, 0.05),
    0 1px 0 rgba(255, 255, 255, 0.08) inset;
}

/* --- Animated Meter Graphic (SVG) --- */
.meter-icon {
  position: relative;
  inline-size: 100px;
  block-size: 100px;
  display: grid;
  place-items: center;
}

.beacon {
  position: absolute;
  inline-size: 80px;
  block-size: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-warning-glow) 0%, transparent 70%);
  animation: beaconPulse 2.5s infinite ease-in-out;
  pointer-events: none;
}

.meter-svg {
  inline-size: 100%;
  block-size: 100%;
  transform: rotate(-90deg);
}

.meter-bg {
  fill: none;
  stroke: hsla(215, 20%, 65%, 0.1);
  stroke-width: 6;
}

.meter-fill {
  fill: none;
  stroke: var(--color-warning);
  stroke-width: 6;
  stroke-dasharray: 251.2; /* 2 * PI * r (r=40) */
  stroke-dashoffset: 251.2;
  stroke-linecap: round;
  animation: fillMeter 1.8s cubic-bezier(0.65, 0, 0.35, 1) 0.5s forwards;
}

.warning-indicator {
  position: absolute;
  color: var(--color-warning);
  font-size: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: warningWiggle 1s ease-in-out infinite alternate;
}

/* --- Typography --- */
.title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5cqi, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.25;
}

.title span.highlight {
  background: linear-gradient(135deg, hsl(38, 92%, 50%) 0%, hsl(15, 90%, 55%) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-warning);
}

.inline-link {
  color: var(--color-warning);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  font-weight: 700;
}

.inline-link:hover, .inline-link:focus-visible {
  color: var(--text-primary);
  text-shadow: 0 0 10px hsla(38, 92%, 50%, 0.4);
  outline: none;
}

.inline-link:focus-visible {
  outline: 2px solid var(--color-warning);
  outline-offset: 2px;
  border-radius: 4px;
}

.description {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-muted);
  font-weight: 400;
  max-inline-size: 90%;
  margin-block-start: -0.5rem;
}

/* --- Premium Link / CTA Button --- */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  color: var(--text-primary);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  cursor: pointer;
}

.cta-button:hover, .cta-button:focus-visible {
  border-color: var(--color-warning);
  color: var(--text-link-hover);
  background: hsla(38, 92%, 50%, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px hsla(38, 92%, 50%, 0.15);
  outline: none;
}

.cta-button:focus-visible {
  outline: 2px solid var(--color-warning);
  outline-offset: 4px;
}

.cta-button svg {
  inline-size: 16px;
  block-size: 16px;
  fill: currentColor;
  transition: transform 0.3s ease;
}

.cta-button:hover svg {
  transform: translateX(4px);
}

/* --- Footer Info --- */
.footer-text {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: hsla(215, 20%, 65%, 0.4);
  margin-block-start: 1rem;
}

/* --- Animations --- */
@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes beaconPulse {
  0% {
    transform: scale(0.9);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.35);
    opacity: 0;
  }
  100% {
    transform: scale(0.9);
    opacity: 0.8;
  }
}

@keyframes fillMeter {
  to {
    stroke-dashoffset: 75.36; /* 70% filled (251.2 * 0.3) */
  }
}

@keyframes warningWiggle {
  from {
    transform: rotate(-3deg);
  }
  to {
    transform: rotate(3deg);
  }
}

/* --- Responsive Adjustments --- */
@media (max-width: 480px) {
  .card {
    padding: 2.5rem 1.5rem;
    gap: 1.5rem;
  }
  
  .title {
    font-size: 1.65rem;
  }
}