:root {
  --green-900: #1e4f19;
  --green-800: #2b6a22;
  --green-700: #3c8429;
  --green-300: #d7f0c6;
  --surface: rgba(13, 34, 9, 0.74);
  --surface-strong: rgba(10, 28, 8, 0.88);
  --border: rgba(255, 255, 255, 0.26);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  font-family: "Inter", "Segoe UI", Arial, Helvetica, sans-serif;
  color: #f5fbef;
  background:
    linear-gradient(160deg, rgba(14, 47, 10, 0.72), rgba(25, 68, 16, 0.78)),
    url("/static/background.jpg");
  background-size: cover, 360px 360px;
  background-repeat: no-repeat, repeat;
  background-attachment: fixed;
}

.app-shell {
  max-width: 1050px;
  height: 100vh;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(170deg, rgba(14, 38, 10, 0.82), rgba(8, 24, 7, 0.86));
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  background: linear-gradient(90deg, var(--green-900), var(--green-700));
  border-bottom: 1px solid var(--border);
}

.logo {
  width: 70px;
  height: 70px;
  border-radius: 16px;
  background: radial-gradient(circle at 30% 15%, #fff, #cde8bc);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.35);
  padding: 4px;
}

h1 { margin: 0; font-size: clamp(1.35rem, 4vw, 2.15rem); letter-spacing: 0.02em; }

.button-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.7rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.16);
}

.day-btn {
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.85rem 0.55rem;
  border-radius: 12px;
  cursor: pointer;
  color: #102111;
  white-space: nowrap;
  transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
}
.day-btn:hover { transform: translateY(-1px); filter: brightness(1.03); }
.day-btn:active { transform: translateY(0); }
.day-btn:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }

.monday { background: #7ee968; }
.tuesday { background: #86ecff; }
.wednesday { background: #fff980; }
.thursday { background: #ffd66a; }
.friday { background: #ff7662; color: #fff; }
.clear-btn {
  background: linear-gradient(145deg, #ff9f8f, #ff6f62);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

.hint {
  text-align: center;
  margin: 0;
  padding: 0.72rem;
  font-size: 1.04rem;
  font-weight: 600;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}


.viewer-shell {
  padding: 1rem;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.status {
  margin-bottom: 0.75rem;
  font-weight: 600;
  text-align: center;
  color: #e8f8da;
}
.pdf-viewer {
  width: 100%;
  flex: 1;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #f3f3f3;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.07), 0 10px 24px rgba(0, 0, 0, 0.3);
  padding: 0.8rem;
  display: grid;
  gap: 0.85rem;
  overflow: auto;
  touch-action: pan-x pan-y;
  overscroll-behavior: contain;
}

.pdf-viewer[hidden] {
  display: none;
}

.empty-state {
  flex: 1;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0) 62%),
    linear-gradient(160deg, rgba(7, 20, 7, 0.22), rgba(7, 20, 7, 0.45));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06), 0 10px 24px rgba(0, 0, 0, 0.24);
}

.empty-state[hidden] {
  display: none;
}

.empty-state-logo {
  width: min(280px, 50vw);
  max-width: 100%;
  opacity: 0.23;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.22));
}


.mobile-zoom-enabled .pdf-viewer {
  touch-action: pan-x pan-y;
}

.mobile-zoom-enabled .pdf-page {
  width: auto;
  max-width: none;
}


.pdf-content {
  width: fit-content;
  min-width: 100%;
  transform-origin: top left;
  will-change: transform;
  display: grid;
  gap: 0.85rem;
}

.pdf-page-wrapper {
  background: #fff;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 0.5rem;
}

.pdf-page-label {
  margin: 0 0 0.4rem 0;
  color: #173112;
  font-weight: 700;
  text-align: center;
}

.pdf-page {
  width: 100%;
  height: auto;
  display: block;
}
.app-footer {
  position: sticky;
  bottom: 0;
  background: var(--surface-strong);
  border-top: 1px solid var(--border);
  padding: 0.95rem;
  text-align: center;
  font-weight: 600;
  color: var(--green-300);
}

@media (max-width: 860px) {
  .app-shell { margin: 0; height: 100vh; border-radius: 0; }
  .button-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 580px) {
  .app-header { padding: 0.8rem; }
  .logo { width: 58px; height: 58px; border-radius: 12px; }
  .button-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}