:root {
  --color-primary: #0D7377;
  --color-primary-hover: #0A5C5F;
  --color-success: #2E7D32;
  --color-warning: #E65100;
  --color-danger: #C62828;
  --color-background: #F5F5F5;
  --color-surface: #FFFFFF;
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-border: #E0E0E0;
  --color-focus: #1976D2;

  --badge-new-bg: #E3F2FD;
  --badge-new-text: #1565C0;
  --badge-review-bg: #FFF3E0;
  --badge-review-text: #E65100;
  --badge-approved-bg: #E8F5E9;
  --badge-approved-text: #2E7D32;
  --badge-rejected-bg: #FFEBEE;
  --badge-rejected-text: #C62828;
  --badge-merged-bg: #F3E5F5;
  --badge-merged-text: #6A1B9A;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --wrapper-width: 720px;
}

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

::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.8;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.page-shell {
  max-width: var(--wrapper-width);
  margin: 0 auto;
  padding: 24px;
}

.page-header {
  margin-bottom: 20px;
}

.page-header h1,
.page-header h2 {
  margin: 0 0 8px;
  color: var(--color-text);
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  font-weight: 700;
}

h2 {
  font-size: 22px;
  line-height: 1.25;
  font-weight: 600;
}

h3 {
  font-size: 18px;
  line-height: 1.3;
  font-weight: 600;
}

p,
li,
label,
input,
textarea,
select,
button {
  font-size: 16px;
}

small,
.helper-text,
.field-help,
.form-note {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.top-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(6px);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
}

.top-nav__inner {
  width: 100%;              /* full width */
  max-width: none;          /* remove 720px limit */
  padding: 12px 24px;

  display: flex;
  align-items: center;
  justify-content: space-between; /* pushes left/right apart */
  flex-wrap: nowrap;        /* prevents wrapping */
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-nav__brand {
  font-weight: 700;
  color: var(--color-text);
  margin-right: auto;
}

.top-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-weight: 600;
}

.top-nav__link:hover {
  background: rgba(13, 115, 119, 0.08);
  text-decoration: none;
}

.top-nav__logout {
  background: transparent;
  border: none;
  font: inherit;
  cursor: pointer;
  color: var(--color-primary);
  font-weight: 600;
}

.top-nav__logout:hover {
  text-decoration: underline;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 16px;
}

.card h2,
.card h3,
.card p:last-child {
  margin-top: 0;
}

.card-intro {
  margin-bottom: 16px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.button,
button,
input[type="submit"] {
  appearance: none;
  border: none;
  border-radius: var(--radius-sm);
  min-height: 48px;
  padding: 14px 32px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.button-primary,
button,
input[type="submit"] {
  background: var(--color-primary);
  color: #fff;
}

.button-primary:hover,
button:hover,
input[type="submit"]:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

.button-secondary {
  background: #fff;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.button-secondary:hover {
  background: rgba(13, 115, 119, 0.06);
  text-decoration: none;
}

.button-danger {
  background: var(--color-danger);
  color: #fff;
}

.button-danger:hover {
  background: #a61f1f;
  text-decoration: none;
}

.form-note {
  margin: 0 0 16px;
}

.required-asterisk,
.required {
  color: var(--color-danger);
  font-weight: 700;
}

.form-section {
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  gap: 16px;
}

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

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-weight: 600;
  color: var(--color-text);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  background: #fff;
  color: var(--color-text);
}

.form-field input,
.form-field select {
  min-height: 48px;
}

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

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--color-primary);
}

.form-field .errorlist {
  margin: 0;
  padding-left: 18px;
  color: var(--color-danger);
}

.form-field .error-message {
  color: var(--color-danger);
  font-size: 14px;
}

.msg {
  margin-bottom: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #eef7f7;
  color: var(--color-text);
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.status-new {
  background: var(--badge-new-bg);
  color: var(--badge-new-text);
}

.status-review {
  background: var(--badge-review-bg);
  color: var(--badge-review-text);
}

.status-approved {
  background: var(--badge-approved-bg);
  color: var(--badge-approved-text);
}

.status-rejected {
  background: var(--badge-rejected-bg);
  color: var(--badge-rejected-text);
}

.status-merged {
  background: var(--badge-merged-bg);
  color: var(--badge-merged-text);
}

.inline-link {
  font-weight: 600;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 16px;
  }

  .card {
    padding: 18px;
  }

  .form-grid-2 {
    grid-template-columns: 1fr;
  }

  .button-row {
    flex-direction: column;
  }

  .button-row .button,
  .button-row button,
  .button-row input[type="submit"] {
    width: 100%;
  }

  .top-nav__inner {
    padding: 12px 16px;
  }
}