/* -------------------------------------------------
   AIKEN Fixer – Professional Light Theme (B/W)
   UX best practices:
   - High contrast, readable typography
   - Clear focus rings (keyboard accessible)
   - Comfortable spacing & hierarchy
   - Neutral surfaces + subtle shadows
-------------------------------------------------- */

:root{
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #fbfbfc;

  --text: #111827;          /* near-black */
  --muted: #4b5563;         /* gray-600 */
  --muted-2: #6b7280;       /* gray-500 */

  --border: #e5e7eb;        /* gray-200 */
  --border-2: #d1d5db;      /* gray-300 */

  --primary: #111827;       /* black */
  --primary-hover: #0b1220; /* deeper */

  --accent: #2563eb;        /* blue-600 for focus/links */
  --accent-soft: rgba(37,99,235,.14);

  --success: #16a34a;
  --warning: #d97706;
  --danger:  #dc2626;

  --radius: 16px;
  --radius-sm: 12px;

  --shadow: 0 10px 30px rgba(17,24,39,.08);
  --shadow-soft: 0 6px 18px rgba(17,24,39,.06);
  --ring: 0 0 0 .22rem rgba(37,99,235,.18);
}

/* Base */
html, body { height: 100%; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout rhythm */
.container{ padding-left: 18px; padding-right: 18px; }
@media (min-width: 992px){
  .container{ padding-left: 22px; padding-right: 22px; }
}

/* Typography */
h1,h2,h3,h4,h5,h6{ letter-spacing: -.01em; }
code{
  color: var(--text);
  background: #f3f4f6;
  border: 1px solid var(--border);
  padding: .1rem .35rem;
  border-radius: 10px;
}

/* Helpers */
.muted{ color: var(--muted); }
.muted.small, .muted .small{ color: var(--muted-2); }
hr.soft{
  border: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
  margin: 1.25rem 0;
}

/* Card */
.card-glass{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}
.card-glass.p-4{ padding: 1.25rem !important; }
@media (min-width: 992px){
  .card-glass.p-4{ padding: 1.5rem !important; }
}

/* Subtle chips */
.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding: .35rem .6rem;
  border-radius: 999px;
  background: #f3f4f6;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 700;
}
.helper-chip{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.55rem .75rem;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
}

/* Links */
a{ color: var(--accent); text-decoration: none; }
a:hover{ color: #1d4ed8; text-decoration: underline; }

/* Buttons (Bootstrap polish) */
.btn{
  border-radius: 14px;
  font-weight: 700;
  letter-spacing: .01em;
  padding: .62rem 1rem;
  transition: transform .06s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn:active{ transform: translateY(1px); }

.btn-primary{
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-soft);
}
.btn-primary:hover{
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow);
}

.btn-outline-light{
  background: #fff;
  border-color: var(--border-2);
  color: var(--text);
}
.btn-outline-light:hover{
  background: #f9fafb;
  border-color: var(--border-2);
}

.btn-outline-info{
  background: #fff;
  border-color: rgba(37,99,235,.35);
  color: var(--accent);
}
.btn-outline-info:hover{
  background: rgba(37,99,235,.06);
  border-color: rgba(37,99,235,.5);
  color: #1d4ed8;
}

.btn-success{
  background: var(--success);
  border-color: var(--success);
  color: #fff;
  box-shadow: var(--shadow-soft);
}
.btn-success:hover{
  filter: brightness(.95);
  box-shadow: var(--shadow);
}

/* Tabs */
.nav-pills .nav-link{
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--border);
  padding: .55rem .9rem;
}
.nav-pills .nav-link:hover{
  color: var(--text);
  background: #f9fafb;
}
.nav-pills .nav-link.active{
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: var(--shadow-soft);
}

/* Forms */
.form-label{ font-weight: 800; color: var(--text); }
.form-text{ color: var(--muted-2) !important; }

.form-control, .form-select, textarea.form-control{
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: .72rem .85rem;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.form-control::placeholder, textarea::placeholder{
  color: #9ca3af; /* gray-400 */
}
.form-control::file-selector-button{
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f3f4f6;
  color: var(--text);
  padding: .5rem .8rem;
  margin-right: .8rem;
}
.form-control:hover, .form-select:hover, textarea.form-control:hover{
  border-color: #9ca3af;
}
.form-control:focus, .form-select:focus, textarea.form-control:focus{
  border-color: var(--accent);
  box-shadow: var(--ring);
  outline: none;
  background: #fff;
}
textarea.form-control{
  min-height: 220px;
  resize: vertical;
}

/* Checks */
.form-check{
  display:flex;
  align-items:flex-start;
  gap:.6rem;
}
.form-check-input{
  width: 1.15em;
  height: 1.15em;
  margin-top: .15rem;
  border-color: var(--border-2);
}
.form-check-input:checked{
  background-color: var(--primary);
  border-color: var(--primary);
}
.form-check-input:focus{
  box-shadow: var(--ring);
}
.form-check-label{ color: var(--muted); }

/* Alerts */
.alert{
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
}
.alert-success{
  border-color: rgba(22,163,74,.25);
  background: rgba(22,163,74,.06);
}
.alert-warning{
  border-color: rgba(217,119,6,.25);
  background: rgba(217,119,6,.06);
}
.alert-danger{
  border-color: rgba(220,38,38,.25);
  background: rgba(220,38,38,.06);
}

/* Lists */
.list-group{
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.list-group-item{
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.list-group-item + .list-group-item{
  border-top: 1px solid var(--border);
}

/* Preview */
pre.codebox{
  background: #0b1220;     /* keep code preview readable */
  color: #e5e7eb;
  border: 1px solid rgba(17,24,39,.20);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  white-space: pre-wrap;
}
pre.codebox code{
  background: transparent;
  border: 0;
  color: inherit;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; scroll-behavior: auto !important; }
}