:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #1f2937;
  --muted: #5b6472;
  --border: #d7dee7;
  --primary: #1f4f8a;
  --primary-hover: #173d6b;
  --secondary: #e8eef5;
  --secondary-hover: #dbe5f0;
  --success: #1f7a4d;
  --warning-bg: #fff8e6;
  --warning-border: #e7c96f;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 14px;
  --radius-sm: 10px;
  --max-width: 1100px;
  --font: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, #f7f9fb 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.55;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 3rem 0 1.75rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
}

.site-header h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.15;
}

.intro {
  max-width: 780px;
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

main.container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
  padding-bottom: 2rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.panel h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.35rem;
}

.section-text {
  margin-top: 0;
  margin-bottom: 1.25rem;
  color: var(--muted);
}

.form-group {
  margin-bottom: 1.1rem;
}

label {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-weight: 700;
  color: var(--text);
}

select,
textarea,
input[type="text"],
input[type="email"],
input[type="number"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--text);
  padding: 0.85rem 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

select {
  min-height: 48px;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 20px) calc(50% - 3px),
    calc(100% - 14px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.8rem;
}

textarea {
  resize: vertical;
  min-height: 110px;
}

select:focus,
textarea:focus,
input:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(31, 79, 138, 0.12);
}

::placeholder {
  color: #7a8696;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.82rem 1.2rem;
  min-height: 46px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

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

button:focus-visible {
  outline: 3px solid rgba(31, 79, 138, 0.18);
  outline-offset: 2px;
}

#generate-btn {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(31, 79, 138, 0.18);
}

#generate-btn:hover {
  background: var(--primary-hover);
}

#copy-btn {
  background: var(--secondary);
  color: var(--text);
  border: 1px solid var(--border);
}

#copy-btn:hover {
  background: var(--secondary-hover);
}

.output-panel {
  min-height: 100%;
}

.output-header {
  margin-bottom: 1rem;
}

.output-box {
  min-height: 360px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
  color: var(--text);
  white-space: pre-wrap;
  overflow-wrap: break-word;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

.note,
.alert,
.helper-text {
  margin-top: 0.5rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--warning-border);
  background: var(--warning-bg);
  border-radius: var(--radius-sm);
  color: #6a5213;
  font-size: 0.95rem;
}

.status-message {
  margin-top: 0.9rem;
  font-size: 0.95rem;
  color: var(--success);
  font-weight: 600;
}

.site-footer {
  padding: 0 0 2rem;
}

.footer-content {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  main.container {
    grid-template-columns: 1fr;
  }

  .output-box {
    min-height: 260px;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 2rem 0 1.25rem;
  }

  .container {
    width: min(100% - 1rem, var(--max-width));
  }

  .panel {
    padding: 1rem;
  }

  .actions {
    flex-direction: column;
  }

  button {
    width: 100%;
  }

  .site-header h1 {
    font-size: 1.9rem;
  }

  .intro,
  .section-text,
  .output-box,
  .site-footer {
    font-size: 0.97rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}