/* ============================================================
   Age Calculator CnC — Stylesheet v1.0.0
   Fonts: DM Sans (body) + Syne (display)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

/* ── Custom properties ─────────────────────────────────────── */
.acc-wrapper {
  --acc-blue:        #2563eb;
  --acc-blue-light:  #eff6ff;
  --acc-blue-mid:    #bfdbfe;
  --acc-purple:      #7c3aed;
  --acc-purple-light:#f5f3ff;
  --acc-purple-mid:  #ddd6fe;
  --acc-text:        #0f172a;
  --acc-text-muted:  #64748b;
  --acc-text-light:  #94a3b8;
  --acc-border:      #e2e8f0;
  --acc-surface:     #f8fafc;
  --acc-white:       #ffffff;
  --acc-success:     #059669;
  --acc-error-bg:    #fef2f2;
  --acc-error-text:  #dc2626;
  --acc-radius:      16px;
  --acc-radius-sm:   10px;
  --acc-shadow:      0 4px 24px rgba(15,23,42,.08), 0 1px 3px rgba(15,23,42,.06);
  --acc-shadow-hover:0 8px 40px rgba(15,23,42,.13), 0 2px 6px rgba(15,23,42,.08);
  --acc-font-display:'Syne', sans-serif;
  --acc-font-body:   'DM Sans', sans-serif;
  font-family: var(--acc-font-body);
  box-sizing: border-box;
  margin: 2rem 0;
}

.acc-wrapper *, .acc-wrapper *::before, .acc-wrapper *::after {
  box-sizing: inherit;
}

/* ── Card shell ────────────────────────────────────────────── */
.acc-card {
  background: var(--acc-white);
  border: 1px solid var(--acc-border);
  border-radius: var(--acc-radius);
  padding: 2rem 2rem 2.25rem;
  box-shadow: var(--acc-shadow);
  transition: box-shadow .3s ease;
  max-width: 680px;
  margin: 0 auto;
}

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

/* ── Card header ───────────────────────────────────────────── */
.acc-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--acc-border);
}

.acc-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.acc-icon-blue {
  background: var(--acc-blue-light);
  color: var(--acc-blue);
}

.acc-icon-purple {
  background: var(--acc-purple-light);
  color: var(--acc-purple);
}

.acc-title {
  font-family: var(--acc-font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--acc-text);
  margin: 0 0 .3rem;
  line-height: 1.25;
}

.acc-subtitle {
  font-size: .875rem;
  color: var(--acc-text-muted);
  margin: 0;
  line-height: 1.55;
}

/* ── Form elements ─────────────────────────────────────────── */
.acc-form-group {
  margin-bottom: 1.25rem;
}

.acc-label {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--acc-text);
  letter-spacing: .02em;
  text-transform: uppercase;
  margin-bottom: .5rem;
}

.acc-label svg {
  color: var(--acc-text-muted);
  flex-shrink: 0;
}

.acc-input {
  width: 100%;
  padding: .75rem 1rem;
  font-family: var(--acc-font-body);
  font-size: 1rem;
  color: var(--acc-text);
  background: var(--acc-surface);
  border: 1.5px solid var(--acc-border);
  border-radius: var(--acc-radius-sm);
  outline: none;
  transition: border-color .2s, background .2s, box-shadow .2s;
  -webkit-appearance: none;
}

.acc-input:hover {
  border-color: #cbd5e1;
  background: var(--acc-white);
}

.acc-input:focus {
  border-color: var(--acc-blue);
  background: var(--acc-white);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.acc-diff-card .acc-input:focus {
  border-color: var(--acc-purple);
  box-shadow: 0 0 0 3px rgba(124,58,237,.12);
}

/* ── Two column layout ─────────────────────────────────────── */
.acc-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 540px) {
  .acc-two-col {
    grid-template-columns: 1fr;
  }
}

/* ── Buttons ───────────────────────────────────────────────── */
.acc-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: .875rem 1.5rem;
  font-family: var(--acc-font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .01em;
  border: none;
  border-radius: var(--acc-radius-sm);
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
  margin-top: .25rem;
  position: relative;
  overflow: hidden;
}

.acc-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background .15s;
}

.acc-btn:hover::after {
  background: rgba(255,255,255,.1);
}

.acc-btn:active {
  transform: scale(.98);
}

.acc-btn-primary {
  background: var(--acc-blue);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}

.acc-btn-primary:hover {
  box-shadow: 0 6px 20px rgba(37,99,235,.45);
  transform: translateY(-1px);
}

.acc-btn-purple {
  background: var(--acc-purple);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,.35);
}

.acc-btn-purple:hover {
  box-shadow: 0 6px 20px rgba(124,58,237,.45);
  transform: translateY(-1px);
}

/* ── Result section ────────────────────────────────────────── */
.acc-result {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--acc-border);
  animation: acc-fade-in .4s ease;
}

@keyframes acc-fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Age result headline ───────────────────────────────────── */
.acc-result-headline {
  text-align: center;
  margin-bottom: 1.5rem;
  background: var(--acc-blue-light);
  border: 1px solid var(--acc-blue-mid);
  border-radius: var(--acc-radius-sm);
  padding: 1.25rem 1rem;
}

.acc-result-big {
  font-family: var(--acc-font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--acc-blue);
  line-height: 1;
  display: block;
  margin-bottom: .25rem;
  letter-spacing: -.02em;
}

.acc-result-label-big {
  font-size: .95rem;
  font-weight: 500;
  color: var(--acc-blue);
  opacity: .75;
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* ── Stats grid ────────────────────────────────────────────── */
.acc-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem;
  margin-bottom: 1rem;
}

@media (max-width: 480px) {
  .acc-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.acc-stat-box {
  background: var(--acc-surface);
  border: 1px solid var(--acc-border);
  border-radius: var(--acc-radius-sm);
  padding: .9rem .5rem .75rem;
  text-align: center;
  transition: transform .2s, border-color .2s;
}

.acc-stat-box:hover {
  transform: translateY(-2px);
  border-color: var(--acc-blue-mid);
}

.acc-stat-purple:hover {
  border-color: var(--acc-purple-mid) !important;
}

.acc-stat-val {
  font-family: var(--acc-font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--acc-blue);
  line-height: 1.1;
  margin-bottom: .2rem;
}

.acc-stat-purple .acc-stat-val {
  color: var(--acc-purple);
}

.acc-stat-lbl {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--acc-text-muted);
}

/* ── Next birthday banner ──────────────────────────────────── */
.acc-next-birthday {
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
  border: 1px solid #86efac;
  border-radius: var(--acc-radius-sm);
  padding: .75rem 1rem;
  font-size: .875rem;
  color: #166534;
  font-weight: 500;
  text-align: center;
  margin-top: .25rem;
}

.acc-next-birthday:empty {
  display: none;
}

/* ── Age difference result ─────────────────────────────────── */
.acc-diff-headline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  background: var(--acc-purple-light);
  border: 1px solid var(--acc-purple-mid);
  border-radius: var(--acc-radius-sm);
  padding: 1.25rem 1rem;
}

.acc-diff-person {
  flex: 1;
  text-align: center;
}

.acc-diff-tag {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--acc-purple);
  background: var(--acc-purple-mid);
  border-radius: 999px;
  padding: 2px 10px;
  display: inline-block;
  margin-bottom: .4rem;
}

.acc-diff-person-name {
  font-family: var(--acc-font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--acc-purple);
}

.acc-diff-vs {
  font-family: var(--acc-font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--acc-text-muted);
  flex-shrink: 0;
}

.acc-diff-summary {
  text-align: center;
  font-size: .9rem;
  color: var(--acc-text-muted);
  margin-bottom: 1.25rem;
  font-style: italic;
}

/* ── Error ─────────────────────────────────────────────────── */
.acc-error {
  margin-top: 1rem;
  padding: .75rem 1rem;
  background: var(--acc-error-bg);
  border: 1px solid #fecaca;
  border-radius: var(--acc-radius-sm);
  color: var(--acc-error-text);
  font-size: .875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.acc-error::before {
  content: '⚠';
  font-style: normal;
}

/* ── Responsive tweaks ─────────────────────────────────────── */
@media (max-width: 540px) {
  .acc-card {
    padding: 1.5rem 1.25rem 1.75rem;
  }
  .acc-result-big {
    font-size: 2.75rem;
  }
  .acc-diff-headline {
    flex-direction: column;
    gap: .5rem;
  }
  .acc-diff-vs {
    transform: rotate(90deg);
  }
}