* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Roboto Mono", ui-monospace, monospace;
}

:root {
  --color-bg:            #f3f4f6;
  --color-bg-elevated:   #ffffff;
  --color-border-soft:   #e5e7eb;
  --color-border-strong: #d1d5db;
  --color-accent:        #2563eb;
  --color-accent-soft:   rgba(37, 99, 235, 0.08);
  --color-text:          #111827;
  --color-text-muted:    #6b7280;
}

html, body {
  height: 100vh;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
}

/* ── Header ─────────────────────────────────── */

.app-header {
  height: 52px;
  padding: 0 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border-soft);
}

.app-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
}

.app-title i {
  color: var(--color-accent);
  font-size: 15px;
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
}

/* Star button — standalone, not primary */
.star-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1.5px solid #f0c040;
  background: linear-gradient(60deg, #fff 20%, #ffd700 60%, #fff 80%);
  background-size: 200% 100%;
  animation: shimmer 10s linear infinite;
  color: #000;
  font-weight: 600;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
}

.star-btn i {
  color: #000;
  font-size: 13px;
}

/* .star-btn:hover {
  animation-duration: 2.5s;
  border-color: #d4a000;
} */

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Vertical divider in header actions */
.header-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border-strong);
  display: inline-block;
}

/* "Made with ♥ by" */
.header-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-muted);
  font-size: 12px;
}

.heart-icon {
  color: #e5383b;
  font-size: 13px;
  filter: drop-shadow(0 0 4px rgba(229, 56, 59, 0.55));
  /* animation: heartbeat 5s ease-in-out infinite; */
}

/* @keyframes heartbeat {
  0%, 100% { transform: scale(1);    filter: drop-shadow(0 0 4px rgba(229, 56, 59, 0.5));  }
  30%       { transform: scale(2); filter: drop-shadow(0 0 8px rgba(229, 56, 59, 0.85)); }
  50%       { transform: scale(1.05); filter: drop-shadow(0 0 5px rgba(229, 56, 59, 0.6));  }
} */

.meta-link {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.meta-link:hover {
  color: var(--color-text);
}

/* ── Main layout ─────────────────────────────── */

.app-main {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

/* ── Page pane ───────────────────────────────── */

.page-pane {
  flex: 7;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  overflow: hidden;
  min-width: 0;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border-soft);
}

.page-frame-wrap {
  position: relative;
  flex-shrink: 0;
}

#page-frame {
  width: 794px;
  height: 1123px;
  border: 1px solid var(--color-border-strong);
  background: #ffffff;
  display: block;
  transform-origin: top left;
  visibility: hidden;
}

/* ── Control pane ────────────────────────────── */

.control-pane {
  flex: 3;
  min-width: 260px;
  max-width: 320px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border-left: 1px solid var(--color-border-soft);
}

.control-section {
  border-radius: 8px;
  border: 1px solid var(--color-border-soft);
  padding: 10px 10px 12px;
  background: #f9fafb;
}

.control-section--footer {
  margin-top: auto;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.section-title i {
  color: var(--color-accent);
  font-size: 13px;
}

/* ── Forms ───────────────────────────────────── */

label {
  display: block;
  font-size: 11px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  margin-top: 2px;
  padding: 5px 8px;
  font-size: 12px;
  border-radius: 4px;
  border: 1px solid var(--color-border-strong);
  background: #ffffff;
  color: var(--color-text);
}

input::placeholder { color: var(--color-text-muted); }

input:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-soft);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* ── Buttons ─────────────────────────────────── */

button {
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
}

.btn-primary {
  width: 100%;
  padding: 8px 10px;
  justify-content: center;
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
}

.btn-primary:hover { background: #1d4ed8; }

.btn-secondary {
  padding: 4px 8px;
  background: transparent;
  color: var(--color-accent);
  border: 1px dashed var(--color-border-strong);
  margin-top: 6px;
}

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

.btn-secondary.active {
  background: var(--color-accent-soft);
  border-style: solid;
}

/* ── Font size rows ──────────────────────────── */

.font-size-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.fs-label {
  font-size: 11px;
  color: var(--color-text-muted);
  width: 52px;
  flex-shrink: 0;
}

.fs-value {
  font-size: 12px;
  font-weight: 600;
  min-width: 28px;
  text-align: center;
}

.fs-unit {
  font-size: 11px;
  color: var(--color-text-muted);
}

.btn-fs {
  padding: 2px 4px;
  background: transparent;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
}

.btn-fs:hover { color: #1d4ed8; }

/* ── Dynamic field lists ─────────────────────── */

#title-list > div,
#details-list > div {
  margin-bottom: 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border-soft);
  padding: 6px;
  background: #ffffff;
}

/* ── Arrow reorder buttons ───────────────────── */

.btn-arrow {
  padding: 2px 5px;
  background: transparent;
  border: 1px solid var(--color-border-soft);
  border-radius: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  font-family: inherit;
}

.btn-arrow:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ── PDF name row ────────────────────────────── */

.pdf-name-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
}

.pdf-name-row input { flex: 1; }

/* ── Star popup ──────────────────────────────── */

.star-popup {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 999;
  justify-content: center;
  align-items: center;
}

.star-popup.visible { display: flex; }

.star-popup-card {
  background: #ffffff;
  border-radius: 12px;
  padding: 28px 32px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  max-width: 360px;
  width: 100%;
}

.star-popup-card > .bi-star-fill {
  font-size: 36px;
  color: #f0c040;
  display: block;
  margin-bottom: 14px;
  filter: drop-shadow(0 0 8px rgba(240, 192, 64, 0.6));
}

.star-popup-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.star-popup-card p {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.star-popup-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: center;
}

/* Star action button inside popup — separate style, not .btn-primary */
.btn-star-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1.5px solid #f0c040;
  background: linear-gradient(60deg, #fff 20%, #ffd700 60%, #fff 80%);
  background-size: 200% 100%;
  animation: shimmer 6s linear infinite;
  color: #000;
  font-weight: 600;
  font-size: 12px;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
}

/* .btn-star-action:hover {
  animation-duration: 2s;
  border-color: #d4a000;
} */

/* "Maybe later" ghost button — compelling but subtle */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  font-size: 12px;
  font-family: inherit;
  font-weight: 500;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color 0.15s, border-color 0.15s;
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}