:root {
  --bg-deep: #0f1a2f;
  --bg-mid: #12253f;
  --bg-soft: #274764;
  --panel: rgba(248, 244, 236, 0.93);
  --panel-ink: #1f1d1b;
  --accent: #ef8354;
  --accent-strong: #d4612f;
  --line: rgba(31, 29, 27, 0.16);
  --shadow: 0 24px 70px rgba(9, 17, 28, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: #f7f4ed;
  background:
    radial-gradient(90rem 50rem at -10% -20%, #2f5678 0%, transparent 45%),
    radial-gradient(80rem 45rem at 120% 10%, #5d4360 0%, transparent 45%),
    linear-gradient(145deg, var(--bg-deep), var(--bg-mid) 50%, var(--bg-soft));
  padding: 24px;
}

.background-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(24rem 24rem at 15% 70%, rgba(239, 131, 84, 0.2), transparent 65%),
    radial-gradient(22rem 22rem at 80% 25%, rgba(245, 228, 192, 0.14), transparent 65%);
  animation: breathe 9s ease-in-out infinite;
}

.drop-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(8, 14, 24, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 160ms ease, visibility 160ms ease;
  z-index: 100;
}

.drop-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.drop-overlay-card {
  width: min(680px, 100%);
  border-radius: 24px;
  padding: 30px 26px;
  border: 2px dashed rgba(245, 228, 192, 0.75);
  background: linear-gradient(145deg, rgba(23, 37, 57, 0.92), rgba(44, 68, 94, 0.88));
  box-shadow: 0 24px 65px rgba(7, 12, 19, 0.45);
  text-align: center;
  color: #f7f4ed;
}

.drop-overlay-kicker {
  margin: 0 0 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.77rem;
  opacity: 0.85;
}

.drop-overlay-card h2 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(1.4rem, 2.4vw, 2.1rem);
}

.drop-overlay-card p {
  margin: 12px 0 0;
}

.app {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  backdrop-filter: blur(6px);
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 16px;
  animation: rise 460ms ease-out both;
}

.kicker {
  margin: 0;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.74rem;
  opacity: 0.78;
}

h1 {
  margin: 4px 0 0;
  font-family: "Fraunces", serif;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.05;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #1f150f;
  font-weight: 700;
  padding: 10px 18px;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
}

.button.secondary {
  background: #f5e4c0;
  color: #3d2d1f;
}

.button.ghost {
  background: rgba(245, 228, 192, 0.18);
  color: #f5e4c0;
  border: 1px solid rgba(245, 228, 192, 0.35);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.meta span {
  background: rgba(245, 228, 192, 0.12);
  border: 1px solid rgba(245, 228, 192, 0.24);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.88rem;
}

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.panel {
  background: var(--panel);
  color: var(--panel-ink);
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.45);
  overflow: hidden;
  animation: rise 620ms ease-out both;
}

.panel h2 {
  margin: 0;
  padding: 14px 18px;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}

#markdownInput {
  display: block;
  width: 100%;
  min-height: 62vh;
  border: 0;
  resize: vertical;
  padding: 18px;
  font: 500 1rem/1.6 "Space Grotesk", sans-serif;
  color: #2f2722;
  background: transparent;
  outline: none;
}

.preview {
  min-height: 62vh;
  max-height: 72vh;
  overflow: auto;
  padding: 20px 22px;
  line-height: 1.65;
}

.preview h1,
.preview h2,
.preview h3 {
  font-family: "Fraunces", serif;
  line-height: 1.2;
  margin-top: 1.5em;
}

.preview h1:first-child,
.preview h2:first-child,
.preview h3:first-child {
  margin-top: 0;
}

.preview p,
.preview li {
  color: #312a24;
}

.preview pre {
  background: #1a2233;
  color: #edf2f7;
  border-radius: 12px;
  padding: 14px;
  overflow: auto;
}

.preview code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
}

.preview blockquote {
  border-left: 4px solid var(--accent);
  margin: 1rem 0;
  padding: 0.2rem 1rem;
  background: rgba(239, 131, 84, 0.08);
}

.preview table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}

.preview th,
.preview td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

.preview img {
  max-width: 100%;
  border-radius: 12px;
}

@keyframes breathe {
  0%,
  100% {
    opacity: 0.72;
  }
  50% {
    opacity: 1;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  body {
    padding: 16px;
  }

  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .panes {
    grid-template-columns: 1fr;
  }

  #markdownInput,
  .preview {
    min-height: 44vh;
    max-height: none;
  }
}