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

:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-secondary: #3b82f6;
  --color-cta: #f97316;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success-bg: #ecfdf5;
  --color-success-border: #6ee7b7;
  --color-error: #ef4444;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

header .logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
  text-decoration: none;
}

header nav {
  display: flex;
  gap: 1.5rem;
}

header nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 200ms ease;
}

header nav a:hover {
  color: var(--color-primary);
}

main {
  max-width: 640px;
  margin: 2.5rem auto;
  padding: 0 1rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

label {
  display: block;
  margin-bottom: 1.25rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text);
}

input,
textarea,
select {
  display: block;
  width: 100%;
  margin-top: 0.375rem;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

button[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding: 0.75rem 2rem;
  min-height: 44px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 200ms ease, transform 150ms ease;
}

button[type="submit"]:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

button[type="submit"]:active:not(:disabled) {
  transform: scale(0.98);
}

button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button[type="submit"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

#confirmation {
  padding: 2rem;
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius-lg);
}

#confirmation h2 {
  margin-bottom: 0.75rem;
}

#lookup-error {
  padding: 0.75rem 1rem;
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  color: var(--color-error);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

#ticket-status {
  margin-top: 2rem;
}

.status-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-open { background: #dbeafe; color: #1e40af; }
.badge-in_progress { background: #fef3c7; color: #92400e; }
.badge-waiting_on_customer { background: #fce7f3; color: #9d174d; }
.badge-resolved { background: #d1fae5; color: #065f46; }
.badge-closed { background: #f1f5f9; color: #475569; }

.thread-message {
  padding: 1rem;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.thread-customer {
  border-left: 3px solid var(--color-primary);
}

.thread-agent {
  border-left: 3px solid var(--color-cta);
  background: #fffbeb;
}

.thread-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.thread-body {
  line-height: 1.7;
}

@media (max-width: 640px) {
  header {
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
  }
  header nav {
    gap: 1rem;
  }
  main {
    margin: 1.5rem auto;
  }
}