:root {
  --bg-start: #2f4a6d;
  --bg-mid: #162435;
  --bg-end: #0c111a;

  --panel-bg: rgba(7, 14, 24, 0.74);
  --panel-line: rgba(96, 127, 166, 0.35);
  --panel-soft: rgba(13, 23, 37, 0.7);

  --text: #e8eef8;
  --muted: #a8bfdc;

  --accent: #69ceff;
  --accent-strong: #53c9ff;
  --ok: #53e8b0;
  --warn: #ffd27a;
  --danger: #ff8b8b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% 8%, var(--bg-start), var(--bg-mid) 45%, var(--bg-end));
}

.container {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.card {
  background: var(--panel-bg);
  border: 1px solid var(--panel-line);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(10px);
}

.hero h1 {
  margin: 0 0 8px;
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.upload-card h2,
.result-card h2 {
  margin-top: 0;
}

.drop-zone {
  position: relative;
  border: 2px dashed rgba(105, 206, 255, 0.45);
  border-radius: 12px;
  padding: 18px;
  background: rgba(10, 20, 33, 0.72);
  text-align: center;
  margin-bottom: 12px;
}

.drop-zone.dragover {
  border-color: rgba(105, 206, 255, 0.92);
  background: rgba(18, 34, 53, 0.86);
}

.drop-zone input[type="file"] {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  color: var(--text);
}

.drop-zone p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 14px;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 14px;
  gap: 6px;
}

input[type="number"] {
  border: 1px solid rgba(119, 157, 201, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  background: rgba(11, 20, 33, 0.84);
  color: #f2f7ff;
}

input[type="number"]:focus {
  outline: none;
  border-color: rgba(105, 206, 255, 0.82);
  box-shadow: 0 0 0 3px rgba(105, 206, 255, 0.16);
}

.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

button {
  appearance: none;
  border: 1px solid rgba(105, 206, 255, 0.5);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: #f2f7ff;
  background: linear-gradient(140deg, rgba(47, 110, 165, 0.95), rgba(25, 63, 98, 0.95));
  transition: border-color 0.18s ease, transform 0.18s ease, filter 0.18s ease;
}

button:hover {
  border-color: rgba(105, 206, 255, 0.86);
  transform: translateY(-1px);
  filter: brightness(1.05);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.hint {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 0;
}

.link-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 0;
  overflow-wrap: anywhere;
}

.link-row a {
  flex: 1;
  color: var(--accent);
  font-size: 14px;
}

.meta-grid {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 8px 12px;
  margin: 14px 0 0;
}

.meta-grid dt {
  color: var(--muted);
}

.meta-grid dd {
  margin: 0;
}

.status-card {
  border-left: 4px solid var(--ok);
}

.status-card.error {
  border-left-color: var(--danger);
}

.status-card p {
  margin: 0;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .meta-grid {
    grid-template-columns: 1fr;
  }

  .link-row {
    flex-direction: column;
    align-items: stretch;
  }
}