:root {
  --pink: #ffb7c5;
  --pink-dark: #e08da0;
  --pink-light: #ffe4ec;
  --pink-mid: #f5a0b5;
  --cream: #fff9fa;
  --cream-dark: #fef0f3;
  --ink: #1f2a1b;
  --ink-muted: #6b5b62;
  --border: #f7cfd8;
  --shadow: 0 4px 20px rgba(224, 141, 160, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Poppins', sans-serif;
  background: var(--cream);
  color: var(--ink);
  min-height: 100vh;
  padding-bottom: 60px;
}

header {
  background: linear-gradient(135deg, #e08da0 0%, #ffb7c5 60%, #ffd6e0 100%);
  color: white;
  padding: 36px 24px 32px;
  text-align: center;
}

.header-icon {
  font-size: 2.4rem;
  margin-bottom: 8px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}

header h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

header p {
  opacity: 0.92;
  margin-top: 6px;
  font-size: 1rem;
  font-weight: 400;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 18px;
}

.api-bar {
  background: white;
  border-bottom: 1.5px solid var(--border);
  padding: 12px 18px;
}

.api-bar-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.api-bar label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-muted);
  white-space: nowrap;
}

.api-bar input {
  flex: 1;
  min-width: 180px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.86rem;
  font-family: 'Poppins', sans-serif;
  background: var(--cream);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.api-bar input:focus { border-color: var(--pink-dark); }

.btn-save {
  background: var(--pink-dark);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-save:hover { background: var(--pink-mid); }

.api-status {
  font-size: 0.78rem;
  color: var(--pink-dark);
  font-weight: 600;
}

.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1.5px solid var(--border);
}

.form-card {
  padding: 28px;
  margin-top: 28px;
}

.form-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 22px;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 13px;
  font-size: 0.93rem;
  font-family: 'Poppins', sans-serif;
  background: var(--cream);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23e08da0' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 36px;
}

.form-group input { background-image: none; padding-right: 13px; }

.form-group input:focus,
.form-group select:focus { border-color: var(--pink-dark); }

.btn-generate {
  width: 100%;
  background: linear-gradient(135deg, #e08da0, #ffb7c5);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 15px;
  font-size: 1.05rem;
  font-weight: 700;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: opacity 0.2s, transform 0.15s;
  letter-spacing: 0.2px;
}

.btn-generate:hover { opacity: 0.92; transform: translateY(-1px); }
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.btn-spinner.active { display: block; }

@keyframes spin { to { transform: rotate(360deg); } }

.loading-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 60px 20px;
  color: var(--ink-muted);
}

.big-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--pink-light);
  border-top-color: var(--pink-dark);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  font-size: 1rem;
  font-weight: 500;
}

.topics-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 16px;
}

.topics-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.badge {
  background: var(--pink-light);
  color: var(--pink-dark);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.topics-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
}

.topic-card {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(224, 141, 160, 0.08);
  transition: box-shadow 0.2s;
}

.topic-card:hover { box-shadow: var(--shadow); }

.topic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  gap: 12px;
  user-select: none;
}

.topic-num {
  width: 30px;
  height: 30px;
  min-width: 30px;
  background: linear-gradient(135deg, #e08da0, #ffb7c5);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
}

.topic-title {
  flex: 1;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.topic-toggle {
  color: var(--pink-dark);
  font-size: 1rem;
  transition: transform 0.25s;
}

.topic-toggle.open { transform: rotate(180deg); }

.topic-body {
  display: none;
  padding: 0 20px 20px;
  border-top: 1px solid var(--border);
}

.topic-body.open { display: block; }

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--pink-dark);
  margin: 16px 0 6px;
}

.thesis-text {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--pink-light);
  border-left: 4px solid var(--pink-dark);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 14px;
  font-style: italic;
}

.args-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.args-list li {
  display: flex;
  gap: 10px;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink);
}

.arg-dot {
  width: 7px;
  height: 7px;
  min-width: 7px;
  background: var(--pink-dark);
  border-radius: 50%;
  margin-top: 7px;
}

.outline-box {
  background: var(--cream-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.outline-row {
  display: flex;
  gap: 10px;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--ink);
}

.outline-part {
  font-weight: 700;
  color: var(--pink-dark);
  min-width: 70px;
  font-size: 0.82rem;
}

.card-footer {
  padding-top: 16px;
  display: flex;
  justify-content: flex-end;
}

.btn-copy {
  background: none;
  border: 1.5px solid var(--pink-dark);
  color: var(--pink-dark);
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: 0.84rem;
  font-weight: 600;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all 0.18s;
}

.btn-copy:hover {
  background: var(--pink-dark);
  color: white;
}

.btn-copy.copied {
  background: #4caf50;
  border-color: #4caf50;
  color: white;
}

.error-msg {
  background: #fde8ed;
  border: 1.5px solid var(--pink);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 0.93rem;
  color: #7a1a2e;
  margin-top: 20px;
}