@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@500;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg: #edf3fb;
  --bg-deep: #dbe9f9;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --stroke: rgba(32, 78, 147, 0.15);
  --text: #10233f;
  --muted: #4f6689;
  --primary: #2a67f6;
  --primary-strong: #1f54d2;
  --accent: #10a37f;
  --accent-strong: #0a8768;
  --danger: #d63b52;
  --shadow: 0 18px 40px rgba(28, 66, 122, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 500px at -5% -20%, rgba(57, 125, 247, 0.25), transparent 65%),
    radial-gradient(900px 420px at 105% 110%, rgba(40, 185, 153, 0.2), transparent 58%),
    linear-gradient(180deg, #f7fbff, var(--bg));
}

.app-shell {
  width: min(860px, 100%);
  margin: 0 auto;
  padding: clamp(16px, 2.8vw, 28px);
}

.hero {
  margin-bottom: 18px;
}

h1 {
  margin: 0;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-size: clamp(30px, 5.2vw, 48px);
  max-width: 16ch;
}

.subtitle {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: clamp(14px, 2.5vw, 20px);
  max-width: 58ch;
}

.panel {
  border: 1px solid var(--stroke);
  background: var(--surface);
  border-radius: 22px;
  padding: clamp(14px, 2.3vw, 22px);
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.panel h2 {
  margin: 0 0 12px;
  font-family: 'Outfit', sans-serif;
  font-size: clamp(20px, 3.2vw, 30px);
  letter-spacing: -0.02em;
}

.panel p {
  margin: 0;
  font-size: clamp(14px, 2.2vw, 17px);
  color: var(--muted);
  line-height: 1.45;
}

label {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}

input {
  width: 100%;
  margin: 0 0 12px;
  padding: 15px 16px;
  border-radius: 14px;
  border: 1px solid var(--stroke);
  font-size: 16px;
  font-family: inherit;
  color: var(--text);
  background: var(--surface-strong);
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

input:focus {
  border-color: rgba(42, 103, 246, 0.45);
  box-shadow: 0 0 0 4px rgba(42, 103, 246, 0.12);
}

.btn {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  cursor: pointer;
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: transform 0.16s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.66;
  cursor: not-allowed;
  transform: none;
}

.btn.primary {
  background: linear-gradient(130deg, var(--primary), var(--primary-strong));
  box-shadow: 0 10px 24px rgba(42, 103, 246, 0.25);
}

.btn.accent {
  background: linear-gradient(130deg, var(--accent), var(--accent-strong));
  box-shadow: 0 10px 24px rgba(16, 163, 127, 0.24);
}

.preview-card {
  display: grid;
  gap: 14px;
}

.preview-cover {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #eff4fb;
}

.preview-meta {
  display: grid;
  gap: 8px;
  color: #2f4468;
  font-size: 16px;
}

.preview-meta strong {
  font-weight: 700;
  color: var(--text);
}

.option-list {
  display: grid;
  gap: 10px;
}

.option-btn {
  text-align: left;
  font-size: 16px;
  background: #f4f8ff;
  color: var(--text);
  border: 1px solid var(--stroke);
  box-shadow: none;
}

.option-btn:hover {
  background: #edf4ff;
}

.hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.status {
  position: sticky;
  bottom: 10px;
  margin: 12px 0 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(16, 35, 63, 0.06);
  border: 1px solid rgba(16, 35, 63, 0.08);
  color: #28456d;
  font-size: 14px;
}

.hidden {
  display: none;
}

.error {
  color: var(--danger);
  border-color: rgba(214, 59, 82, 0.25);
  background: rgba(214, 59, 82, 0.08);
}

@media (max-width: 760px) {
  .app-shell {
    padding: 14px;
  }

  .panel {
    border-radius: 18px;
    padding: 14px;
  }

  .btn {
    font-size: 18px;
    padding: 13px 14px;
  }

  .preview-meta {
    font-size: 15px;
  }
}