@font-face {
  font-family: "Mitr";
  src: url("resources/fonts/Mitr/Mitr-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Mitr";
  src: url("resources/fonts/Mitr/Mitr-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Mitr";
  src: url("resources/fonts/Mitr/Mitr-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Supermercado One";
  src: url("resources/fonts/Supermercado_One/SupermercadoOne-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: oklch(0.985 0.012 87);
  --paper-deep: oklch(0.94 0.024 82);
  --wash-blue: oklch(0.925 0.035 220);
  --wash-blue-deep: oklch(0.82 0.055 213);
  --teal: oklch(0.62 0.105 183);
  --teal-deep: oklch(0.39 0.075 188);
  --ink: oklch(0.24 0.07 272);
  --muted: oklch(0.48 0.035 223);
  --rose: oklch(0.78 0.08 18);
  --shadow: 0 26px 70px oklch(0.31 0.05 222 / 0.2);
  --soft-shadow: 0 12px 28px oklch(0.31 0.05 222 / 0.14);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  color: var(--ink);
  font-family: "Mitr", ui-sans-serif, system-ui, sans-serif;
  background:
    radial-gradient(circle at 18% 12%, oklch(0.98 0.03 218 / 0.82), transparent 22rem),
    radial-gradient(circle at 86% 18%, oklch(0.88 0.05 16 / 0.45), transparent 18rem),
    linear-gradient(180deg, var(--wash-blue) 0%, var(--paper) 42%, var(--paper-deep) 100%);
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(90deg, oklch(0.94 0.02 230 / 0.16) 1px, transparent 1px),
    linear-gradient(180deg, oklch(0.72 0.025 72 / 0.08) 1px, transparent 1px);
  background-size: 22px 22px, 19px 19px;
  mix-blend-mode: multiply;
  opacity: 0.42;
}

button,
a {
  font: inherit;
}

[hidden] {
  display: none !important;
}

.reader-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  width: 100vw;
  height: 100dvh;
  min-height: 100vh;
  padding: clamp(0.55rem, 1.6vw, 1.15rem);
  isolation: isolate;
}

.reader-topbar,
.reader-controls {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.reader-topbar {
  top: max(0.55rem, env(safe-area-inset-top));
  right: clamp(0.7rem, 2.2vw, 1.6rem);
  left: clamp(0.7rem, 2.2vw, 1.6rem);
  pointer-events: none;
}

.brand-mark {
  color: #0a0670;
  font-family: "Supermercado One", "Mitr", ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(1.55rem, 3vw, 2.85rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
}

.pdf-link {
  color: var(--teal-deep);
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
  pointer-events: auto;
}

.reader-stage {
  position: relative;
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: clamp(3.1rem, 7svh, 4.6rem) 0 clamp(3.35rem, 7svh, 4.6rem);
  place-items: center;
}

.paper-stack {
  position: absolute;
  inset: 9% 13%;
  max-width: 66rem;
  margin: auto;
  pointer-events: none;
}

.paper-stack span {
  position: absolute;
  inset: 0;
  background: oklch(0.97 0.014 86 / 0.72);
  border: 1px solid oklch(0.78 0.04 84 / 0.45);
  border-radius: 1.35rem;
  box-shadow: var(--soft-shadow);
}

.paper-stack span:first-child {
  transform: rotate(-2.2deg) translate(-0.8rem, 0.35rem);
}

.paper-stack span:last-child {
  transform: rotate(1.6deg) translate(0.75rem, 0.2rem);
}

.page-frame {
  position: relative;
  width: min(100%, 70rem);
  height: min(100%, 40rem);
  max-width: calc(100vw - clamp(1rem, 4vw, 4rem));
  max-height: calc(100svh - clamp(1rem, 3svh, 2rem));
  overflow: visible;
  outline: none;
  touch-action: pan-y pinch-zoom;
}

.page-frame::before {
  position: absolute;
  inset: -0.9rem;
  z-index: 0;
  content: "";
  background: linear-gradient(135deg, oklch(0.99 0.01 88), oklch(0.93 0.02 82));
  border: 1px solid oklch(0.75 0.035 88 / 0.34);
  border-radius: 1.4rem;
  box-shadow: var(--shadow);
}

.pdf-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  max-width: 100%;
  max-height: 100%;
  margin: auto;
  background: var(--paper);
  border-radius: 0.85rem;
  box-shadow: 0 16px 42px oklch(0.28 0.045 230 / 0.18);
  opacity: 0;
  transform: translate3d(0, 0.65rem, 0) scale(0.985);
  transition:
    opacity 520ms var(--ease-out-quart),
    transform 520ms var(--ease-out-quart),
    box-shadow 520ms var(--ease-out-quart);
}

.pdf-canvas.is-current {
  z-index: 2;
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

.pdf-canvas.is-incoming {
  z-index: 3;
  opacity: 0;
}

.page-frame.turn-next .pdf-canvas.is-incoming {
  transform: translate3d(5.5%, 1.2rem, 0) rotate(1.6deg) scale(0.985);
}

.page-frame.turn-prev .pdf-canvas.is-incoming {
  transform: translate3d(-5.5%, 1.2rem, 0) rotate(-1.6deg) scale(0.985);
}

.page-frame.is-animating .pdf-canvas.is-incoming {
  opacity: 1;
  transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
  box-shadow: 0 18px 48px oklch(0.28 0.045 230 / 0.2);
}

.page-frame.is-animating.turn-next .pdf-canvas.is-current {
  opacity: 0;
  transform: translate3d(-4.5%, -0.5rem, 0) rotate(-1.35deg) scale(0.985);
}

.page-frame.is-animating.turn-prev .pdf-canvas.is-current {
  opacity: 0;
  transform: translate3d(4.5%, -0.5rem, 0) rotate(1.35deg) scale(0.985);
}

.reader-message {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  color: var(--muted);
  text-align: center;
}

.reader-message p {
  max-width: 28ch;
  margin: 0;
  padding: 0.95rem 1.1rem;
  background: oklch(0.985 0.012 87 / 0.88);
  border: 1px solid oklch(0.77 0.035 84 / 0.42);
  border-radius: 1rem;
  box-shadow: var(--soft-shadow);
}

.reader-error {
  color: var(--ink);
}

.reader-error a {
  color: var(--teal-deep);
}

.reader-controls {
  bottom: max(0.65rem, env(safe-area-inset-bottom));
  left: 50%;
  width: min(18rem, 100%);
  gap: 0.45rem;
  padding: 0.34rem;
  background: oklch(0.985 0.012 87 / 0.82);
  border: 1px solid oklch(0.76 0.035 84 / 0.4);
  border-radius: 999px;
  box-shadow: var(--soft-shadow);
  transform: translateX(-50%);
}

.reader-button-icon {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  padding: 0;
  color: var(--paper);
  cursor: pointer;
  background: var(--teal-deep);
  border: 0;
  border-radius: 999px;
  line-height: 1;
  place-items: center;
  transition: transform 180ms var(--ease-out-quart), background 180ms var(--ease-out-quart), opacity 180ms var(--ease-out-quart);
}

.reader-button-icon span {
  display: block;
  margin-top: -0.08em;
  font-size: 1.9rem;
  font-weight: 400;
}

.reader-button-icon:hover:not(:disabled) {
  background: var(--ink);
  transform: translateY(-1px);
}

.reader-button-icon:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.reader-button-icon:focus-visible,
.pdf-link:focus-visible,
.page-frame:focus-visible {
  outline: 3px solid oklch(0.72 0.11 184 / 0.4);
  outline-offset: 4px;
}

.page-count {
  min-width: 4.7rem;
  margin: 0;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

.page-separator {
  padding: 0 0.25rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .reader-shell {
    padding-inline: 0.5rem;
  }

  .reader-topbar {
    gap: 0.75rem;
    right: 0.65rem;
    left: 0.65rem;
  }

  .brand-mark {
    font-size: clamp(1.18rem, 5.8vw, 1.55rem);
  }

  .pdf-link {
    font-size: 0.78rem;
  }

  .reader-stage {
    padding: clamp(2.5rem, 7svh, 3.35rem) 0 clamp(3rem, 7svh, 3.8rem);
  }

  .page-frame::before {
    inset: -0.42rem;
    border-radius: 1rem;
  }

  .pdf-canvas {
    border-radius: 0.55rem;
  }

  .reader-controls {
    padding: 0.28rem;
  }

  .reader-button-icon {
    width: 2.18rem;
    height: 2.18rem;
  }

  .page-count {
    min-width: 4.35rem;
    font-size: 0.84rem;
  }
}

@media (max-height: 540px) and (orientation: landscape) {
  .reader-shell {
    padding: 0.35rem;
  }

  .reader-topbar {
    top: max(0.35rem, env(safe-area-inset-top));
    right: max(0.55rem, env(safe-area-inset-right));
    left: max(0.55rem, env(safe-area-inset-left));
  }

  .brand-mark {
    font-size: 1.15rem;
  }

  .pdf-link {
    font-size: 0.82rem;
  }

  .reader-stage {
    padding: 0.28rem 0;
  }

  .paper-stack {
    opacity: 0.48;
  }

  .page-frame::before {
    inset: -0.38rem;
  }

  .reader-button-icon {
    width: 2.05rem;
    height: 2.05rem;
  }

  .reader-controls {
    top: 50%;
    right: max(0.42rem, env(safe-area-inset-right));
    bottom: auto;
    left: auto;
    flex-direction: column;
    width: auto;
    padding: 0.24rem;
    background: oklch(0.985 0.012 87 / 0.74);
    transform: translateY(-50%);
  }

  .page-count {
    min-width: 3.7rem;
  }
}

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