:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --panel: #ffffff;
  --line: #d8dde3;
  --text: #18212b;
  --muted: #596575;
  --primary: #0e7490;
  --primary-strong: #0a5f75;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(12, 24, 34, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, #e6eff5 0%, transparent 30%),
    radial-gradient(circle at 90% 20%, #e1f4f2 0%, transparent 35%),
    var(--bg);
}

.app {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 16px 40px;
  display: grid;
  gap: 14px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.hero p {
  margin: 6px 0 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
  transition: background 0.15s ease;
}

button:hover:not(:disabled) {
  background: var(--primary-strong);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.neutral {
  background: #f1f4f7;
  border-color: var(--line);
  color: var(--text);
}

.neutral:hover:not(:disabled) {
  background: #e6ebf0;
}

.status {
  margin: 12px 0 0;
  color: var(--muted);
  min-height: 1.5em;
}

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

.viewer {
  display: grid;
  place-items: center;
  min-height: 220px;
}

video {
  width: 100%;
  max-height: min(60vh, 520px);
  border-radius: 10px;
  background: #0f1722;
  object-fit: cover;
}

.result h2 {
  margin: 0 0 10px;
  font-size: 1rem;
}

textarea {
  width: 100%;
  min-height: 92px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.url-modal {
  width: min(560px, calc(100vw - 24px));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0;
}

.url-modal[data-open-fallback="true"] {
  position: fixed;
  left: 12px;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  margin: 0 auto;
  z-index: 9999;
  background: #fff;
}

.url-modal::backdrop {
  background: rgba(10, 19, 28, 0.38);
}

.url-modal-body {
  padding: 16px;
}

.url-modal-body h2 {
  margin: 0;
  font-size: 1.05rem;
}

.url-modal-body p {
  margin: 10px 0 14px;
  color: var(--text);
  word-break: break-all;
}

.url-warning-box {
  margin: 14px 0;
  padding: 12px;
  background: #dbf0fa;
  border: 1px solid #87d6fa;
  border-radius: 8px;
}

.url-warning-text {
  margin: 0 !important;
  font-size: 0.9rem;
  color: #000000 !important;
  font-weight: 600;
}

.url-domain {
  margin: 6px 0 0 !important;
  font-size: 1.2rem;
  font-weight: 700;
  color: #2d3748 !important;
  letter-spacing: -0.01em;
}

.url-full-path {
  font-size: 0.85rem;
  color: var(--muted) !important;
  background: #f8fafc;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--line);
}

@media (max-width: 640px) {
  .app {
    padding-top: 18px;
  }

  .panel {
    border-radius: 12px;
    padding: 12px;
  }

  button {
    width: 100%;
  }
}