/* Instituto do Ouvido — Design System */

:root {
  /* Brand */
  --brand-h: 222;
  --brand-c: 0.18;
  --brand: oklch(0.32 var(--brand-c) var(--brand-h));
  --brand-deep: oklch(0.22 var(--brand-c) var(--brand-h));
  --brand-soft: oklch(0.96 0.02 var(--brand-h));
  --brand-mid: oklch(0.55 0.12 var(--brand-h));

  /* Accent (default white-on-brand approach; configurable) */
  --accent: oklch(0.92 0.06 165);
  --accent-strong: oklch(0.72 0.14 165);

  /* Neutrals — paper warmth tunable */
  --paper-h: 80;
  --paper: oklch(0.99 0.005 var(--paper-h));
  --paper-2: oklch(0.97 0.008 var(--paper-h));
  --paper-3: oklch(0.94 0.01 var(--paper-h));
  --ink: oklch(0.18 0.02 var(--brand-h));
  --ink-2: oklch(0.42 0.02 var(--brand-h));
  --ink-3: oklch(0.62 0.015 var(--brand-h));
  --line: oklch(0.9 0.01 var(--brand-h));
  --line-2: oklch(0.86 0.012 var(--brand-h));

  /* Density */
  --space-1: 6px;
  --space-2: 10px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 36px;
  --space-6: 56px;
  --space-7: 88px;
  --space-8: 128px;

  /* Type */
  --font-sans: "Manrope", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: "Manrope", -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  /* Radii */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-2xl: 44px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(8, 18, 40, 0.04), 0 2px 6px rgba(8, 18, 40, 0.04);
  --shadow-md: 0 4px 16px rgba(8, 18, 40, 0.06), 0 12px 36px rgba(8, 18, 40, 0.06);
  --shadow-lg: 0 12px 32px rgba(8, 18, 40, 0.08), 0 32px 80px rgba(8, 18, 40, 0.1);
  --shadow-glow: 0 0 0 1px oklch(0.85 0.04 var(--brand-h)), 0 20px 60px -10px oklch(0.4 0.15 var(--brand-h) / 0.25);

  /* Card style toggle */
  --card-bg: var(--paper);
  --card-border: 1px solid var(--line);
  --card-shadow: var(--shadow-sm);
  --card-hover-shadow: var(--shadow-md);
  --card-blur: 0;

  /* Anim intensity multiplier */
  --anim: 1;
}

[data-density="compact"] {
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 18px;
  --space-5: 28px;
  --space-6: 44px;
  --space-7: 68px;
  --space-8: 96px;
}

[data-card="elevated"] {
  --card-bg: var(--paper);
  --card-border: 1px solid transparent;
  --card-shadow: var(--shadow-md);
  --card-hover-shadow: var(--shadow-lg);
}

[data-card="glass"] {
  --card-bg: oklch(1 0 0 / 0.6);
  --card-border: 1px solid oklch(1 0 0 / 0.7);
  --card-shadow: var(--shadow-md);
  --card-hover-shadow: var(--shadow-lg);
  --card-blur: 18px;
}

[data-mode="dark"] {
  --paper: oklch(0.16 0.02 var(--brand-h));
  --paper-2: oklch(0.2 0.025 var(--brand-h));
  --paper-3: oklch(0.24 0.03 var(--brand-h));
  --ink: oklch(0.97 0.01 var(--brand-h));
  --ink-2: oklch(0.78 0.02 var(--brand-h));
  --ink-3: oklch(0.6 0.02 var(--brand-h));
  --line: oklch(0.32 0.03 var(--brand-h));
  --line-2: oklch(0.38 0.04 var(--brand-h));
  --brand-soft: oklch(0.28 0.06 var(--brand-h));
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 12px 36px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5), 0 32px 80px rgba(0, 0, 0, 0.4);
}

/* Logo image */
.logo-img { height: 36px; width: auto; display: block; max-width: none; }
.logo-img-sm { height: 30px; }
.logo-img-footer { height: 56px; }
[data-mode="dark"] .logo-img { filter: brightness(0) invert(1); }

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background: var(--brand);
  color: white;
}

/* Typography */
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--brand);
  opacity: 0.5;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}

h1 {
  font-size: clamp(40px, 6vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 500;
}

h2 {
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 500;
}

h3 {
  font-size: clamp(20px, 1.6vw, 26px);
  line-height: 1.2;
  font-weight: 600;
}

p {
  margin: 0;
  line-height: 1.6;
  color: var(--ink-2);
  text-wrap: pretty;
}

.lead {
  font-size: clamp(17px, 1.3vw, 20px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 60ch;
}

/* Layout */
.container {
  width: min(1280px, 100% - 48px);
  margin-inline: auto;
}

.container-wide {
  width: min(1440px, 100% - 32px);
  margin-inline: auto;
}

section {
  padding-block: var(--space-8);
  position: relative;
}

@media (max-width: 720px) {
  section {
    padding-block: var(--space-7);
  }
  .container, .container-wide {
    width: calc(100% - 32px);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  transition: all calc(0.25s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--brand);
  color: white;
  box-shadow: 0 1px 0 0 oklch(1 0 0 / 0.2) inset, 0 8px 24px -8px oklch(0.4 0.15 var(--brand-h) / 0.5);
}

.btn-primary:hover {
  transform: translateY(calc(-2px * var(--anim)));
  box-shadow: 0 1px 0 0 oklch(1 0 0 / 0.2) inset, 0 16px 32px -8px oklch(0.4 0.15 var(--brand-h) / 0.6);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-2);
}

.btn-ghost:hover {
  background: var(--paper-2);
  border-color: var(--ink-3);
}

.btn-glass {
  background: oklch(1 0 0 / 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid oklch(1 0 0 / 0.2);
  color: white;
}

.btn-glass:hover {
  background: oklch(1 0 0 / 0.2);
}

.btn .arrow {
  transition: transform calc(0.25s * var(--anim));
}

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

/* Cards */
.card {
  background: var(--card-bg);
  border: var(--card-border);
  box-shadow: var(--card-shadow);
  border-radius: var(--r-lg);
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
  transition: all calc(0.3s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card:hover {
  box-shadow: var(--card-hover-shadow);
  transform: translateY(calc(-4px * var(--anim)));
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(calc(28px * var(--anim)));
  transition: opacity calc(0.8s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1),
              transform calc(0.8s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(calc(20px * var(--anim)));
  transition: opacity calc(0.7s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1),
              transform calc(0.7s * var(--anim)) cubic-bezier(0.2, 0.8, 0.2, 1);
}

.stagger.in > * {
  opacity: 1;
  transform: translateY(0);
}

.stagger.in > *:nth-child(1) { transition-delay: 0ms; }
.stagger.in > *:nth-child(2) { transition-delay: 80ms; }
.stagger.in > *:nth-child(3) { transition-delay: 160ms; }
.stagger.in > *:nth-child(4) { transition-delay: 240ms; }
.stagger.in > *:nth-child(5) { transition-delay: 320ms; }
.stagger.in > *:nth-child(6) { transition-delay: 400ms; }
.stagger.in > *:nth-child(7) { transition-delay: 480ms; }
.stagger.in > *:nth-child(8) { transition-delay: 560ms; }

/* Sound-wave gradient placeholder */
.sound-grad {
  position: relative;
  background: linear-gradient(135deg,
    oklch(0.4 var(--brand-c) var(--brand-h)) 0%,
    oklch(0.32 var(--brand-c) calc(var(--brand-h) - 10)) 50%,
    oklch(0.22 var(--brand-c) calc(var(--brand-h) + 10)) 100%);
  overflow: hidden;
}

.sound-grad::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse at 20% 30%, oklch(0.85 0.08 var(--brand-h) / 0.4), transparent 50%),
    radial-gradient(ellipse at 80% 70%, oklch(0.95 0.04 var(--brand-h) / 0.3), transparent 60%);
  filter: blur(40px);
}

/* Mono labels */
.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 20%, var(--line) 80%, transparent);
  margin-block: var(--space-5);
}

/* Pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-2);
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.pill-dot.live {
  background: oklch(0.7 0.18 145);
  box-shadow: 0 0 0 0 oklch(0.7 0.18 145 / 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 oklch(0.7 0.18 145 / 0.6); }
  70% { box-shadow: 0 0 0 8px oklch(0.7 0.18 145 / 0); }
  100% { box-shadow: 0 0 0 0 oklch(0.7 0.18 145 / 0); }
}

/* Audio-wave abstract motif */
.wave-bars {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 24px;
}

.wave-bars span {
  display: block;
  width: 3px;
  background: currentColor;
  border-radius: 2px;
  animation: wave 1.6s ease-in-out infinite;
}

.wave-bars span:nth-child(1) { height: 30%; animation-delay: 0s; }
.wave-bars span:nth-child(2) { height: 60%; animation-delay: 0.1s; }
.wave-bars span:nth-child(3) { height: 90%; animation-delay: 0.2s; }
.wave-bars span:nth-child(4) { height: 70%; animation-delay: 0.3s; }
.wave-bars span:nth-child(5) { height: 100%; animation-delay: 0.4s; }
.wave-bars span:nth-child(6) { height: 50%; animation-delay: 0.5s; }
.wave-bars span:nth-child(7) { height: 80%; animation-delay: 0.6s; }
.wave-bars span:nth-child(8) { height: 40%; animation-delay: 0.7s; }

@keyframes wave {
  0%, 100% { transform: scaleY(0.4); }
  50% { transform: scaleY(1); }
}

/* Concentric circles motif */
.concentric {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}

.concentric circle {
  fill: none;
  stroke: currentColor;
  stroke-width: 1;
  opacity: 0.15;
}

/* WhatsApp floating */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25d366;
  color: white;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
  z-index: 80;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.whatsapp-float::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid #25d366;
  animation: ring-pulse 2s ease-out infinite;
}

@keyframes ring-pulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

.whatsapp-float:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 32px rgba(37, 211, 102, 0.55);
}

/* Decorative grid background */
.grid-bg {
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  opacity: 0.4;
}

/* Section header */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.section-header .title-block {
  max-width: 720px;
}

.section-header .title-block .eyebrow {
  margin-bottom: var(--space-3);
}

.section-header .title-block h2 {
  margin-bottom: var(--space-3);
}

/* Utility */
.text-mute { color: var(--ink-2); }
.text-faint { color: var(--ink-3); }
.text-brand { color: var(--brand); }

/* Page transition fade-in */
.page-fade {
  opacity: 0;
  animation: pageFade 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) 0.05s forwards;
}

@keyframes pageFade {
  to { opacity: 1; }
}