/* Θέματα */
:root{
  --bg: #f6f7fb;
  --text: #0f1420;
  --muted: #667085;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --shadow: rgba(16, 24, 40, .06);
  --btn-primary: #14863d;
  --btn-primary-text: #ffffff;
  --btn-secondary: #607D8B;
  --btn-secondary-text: #ffffff;
  --accent: #2ea043;
}
:root[data-theme="dark"]{
  --bg: #0f1220;
  --text: #e6e9f2;
  --muted: #9aa4c2;
  --card-bg: #171c2f;
  --card-border: #2a3357;
  --shadow: rgba(0,0,0,.45);
  --btn-primary: #2ea043;
  --btn-primary-text: #f7f7f7;
  --btn-secondary: #344a5a;
  --btn-secondary-text: #f7f7f7;
  --accent: #3ddc84;
}

html, body { height: 100%; }
body{
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
}

/* Theme toggle (μέσα στο header) */
.theme-toggle{
  border: none;
  background: transparent;
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}
.theme-toggle.as-header{
  position: static;
  margin-left: 6px;
}
.theme-toggle.fallback{
  position: fixed;
  top: 10px; right: 12px;
  z-index: 10001;
}

/* Layout */
.checkout-wrap{
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 16px 40px;
}
.page-title{
  font-size: 36px;
  margin: 8px 0 18px;
}
.section-title{
  font-size: 26px;
  margin: 18px 0 10px;
}

/* Πίνακας προϊόντων */
.table-card{
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  box-shadow: 0 10px 24px var(--shadow);
  overflow: hidden;
}
.items-table{
  width: 100%;
  border-collapse: collapse;
}
.items-table th, .items-table td{
  padding: 14px 16px;
  border-bottom: 1px solid var(--card-border);
  vertical-align: top;
}
.items-table thead th{
  font-weight: 700;
  background: color-mix(in oklab, var(--card-bg), var(--text) 5%);
}
.items-table tr:last-child td{ border-bottom: none; }
.center{ text-align: center; }

.item-meta{
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

/* Σύνολο */
.total-line{
  text-align: center;
  margin: 20px 0 10px;
  font-size: 22px;
}

/* Φόρμα επιλογών */
.checkout-form{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
}
.radio-group{
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}
.free-shipping{
  color: #159947;
  font-weight: 700;
  margin: 6px 0 2px;
  text-align: center;
}

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 8px;
  border: 0;
  cursor: pointer;
  font-size: 16px;
  text-decoration: none;
}
.btn-primary{
  background: var(--btn-primary);
  color: var(--btn-primary-text);
}
.btn-secondary{
  background: var(--btn-secondary);
  color: var(--btn-secondary-text);
}
.btn:focus{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.back-actions{
  text-align: center;
  margin-top: 18px;
}