:root {
  /* Cores - modo claro */
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-surface-raised: #FFFFFF;
  --color-border: #E7E5DF;
  --color-text-primary: #1C2624;
  --color-text-secondary: #5B6866;
  --color-text-muted: #8A948F;

  --color-accent: #2D5F5A;       /* teal profundo — cor de assinatura */
  --color-accent-hover: #234A46;
  --color-accent-soft: #E4EDEC;

  --color-danger: #9B4A3F;
  --color-danger-hover: #7E3B32;
  --color-danger-soft: #F3E7E4;

  --color-focus: #2D5F5A;

  /* Tipografia */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Espaçamento */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Raio e sombra */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(28, 38, 36, 0.06);
  --shadow-md: 0 4px 16px rgba(28, 38, 36, 0.08);
  --shadow-lg: 0 12px 40px rgba(28, 38, 36, 0.12);

  /* Transições */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 600ms;
}

/* Modo escuro automático, conforme preferência do sistema */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14181A;
    --color-surface: #1B2020;
    --color-surface-raised: #202524;
    --color-border: #2C3230;
    --color-text-primary: #EDEFEC;
    --color-text-secondary: #A9B2AE;
    --color-text-muted: #7A827E;

    --color-accent: #6FB3A8;
    --color-accent-hover: #8AC4BB;
    --color-accent-soft: #1E2D2B;

    --color-danger: #D98A7C;
    --color-danger-hover: #E4A296;
    --color-danger-soft: #2C201E;

    --color-focus: #6FB3A8;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--duration-base) var(--ease-standard);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  color: var(--color-text-primary);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent);
}

button {
  font-family: inherit;
}

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

/* Foco visível para acessibilidade via teclado */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Respeita preferência de movimento reduzido */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}


.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5) var(--space-5) var(--space-4);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}

.site-header__mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 var(--space-4) var(--space-8);
  width: 100%;
}


.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 50;
}

.reading-progress__fill {
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width var(--duration-fast) linear;
}

.document-card {
  width: 100%;
  max-width: 760px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: background-color var(--duration-base) var(--ease-standard);
}

.document-card__header {
  padding: var(--space-6) var(--space-6) var(--space-4);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.document-card__eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.document-card__title {
  font-size: 26px;
  margin-bottom: var(--space-1);
}

.document-card__subtitle {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
}

.viewer-wrap {
  position: relative;
  background: var(--color-bg);
}

.viewer-scroll {
  max-height: 70vh;
  overflow-y: auto;
  overflow-x: auto;
  padding: var(--space-5);
  scroll-behavior: smooth;
}

.viewer-scroll canvas {
  display: block;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  background: #fff;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.zoom-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.zoom-btn:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.zoom-level {
  font-size: 13px;
  color: var(--color-text-muted);
  min-width: 46px;
  text-align: center;
}

.viewer-status {
  text-align: center;
  padding: var(--space-3) var(--space-5);
  font-size: 13px;
  color: var(--color-text-muted);
}

.decision-area {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

.decision-area.is-visible {
  animation: fadeInUp var(--duration-slow) var(--ease-standard) forwards;
  pointer-events: auto;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.decision-area__prompt {
  font-size: 15px;
  margin-bottom: var(--space-5);
  color: var(--color-text-secondary);
}

.decision-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  transition: transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn:not(:disabled):hover {
  transform: translateY(-1px);
}

.btn:not(:disabled):active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.btn-primary:not(:disabled):hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.btn-secondary:not(:disabled):hover {
  background: var(--color-danger);
  color: #FFFFFF;
}

.btn-neutral {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-neutral:not(:disabled):hover {
  border-color: var(--color-accent);
}

.decision-note {
  margin-top: var(--space-5);
  font-size: 13px;
  color: var(--color-text-muted);
}

.state-card {
  width: 100%;
  max-width: 460px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-7) var(--space-6);
  text-align: center;
  margin-top: var(--space-6);
  animation: fadeInUp var(--duration-slow) var(--ease-standard);
}

.state-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
}

.state-card__title {
  font-size: 22px;
  margin-bottom: var(--space-3);
}

.state-card__text {
  font-size: 15px;
  margin-bottom: var(--space-2);
}

.state-card__meta {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}


.schedule-form {
  padding: var(--space-6);
}

.field-group {
  margin-bottom: var(--space-5);
  text-align: left;
}

.field-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.field-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  font-size: 15px;
  font-family: var(--font-body);
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.field-group input:focus {
  border-color: var(--color-accent);
}

.form-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--space-6);
}

.form-status {
  min-height: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--color-danger);
  margin-top: var(--space-3);
}

.site-footer {
  text-align: center;
  padding: var(--space-5);
  font-size: 12px;
  color: var(--color-text-muted);
}


@media (max-width: 600px) {
  .document-card__title {
    font-size: 21px;
  }

  .viewer-scroll {
    max-height: 60vh;
    padding: var(--space-3);
  }

  .decision-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .state-card {
    padding: var(--space-6) var(--space-4);
  }
}