:root {
  --bg: #f3f7fb;
  --panel: #ffffff;
  --ink: #132238;
  --muted: #65758b;
  --line: #d8e2ee;
  --blue: #1769b5;
  --blue-dark: #0f4f88;
  --blue-soft: #edf6ff;
  --danger: #b42318;
  --danger-soft: #fff1f0;
  --shadow: 0 10px 28px rgba(19, 34, 56, 0.07);
}

* {
  box-sizing: border-box;
}

html {
  direction: rtl;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Tahoma, Arial, sans-serif;
  line-height: 1.6;
}

.site-header,
.site-footer,
.page-shell {
  width: min(1180px, calc(100% - 28px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

h1,
h2,
p {
  margin: 0;
}

.brand h1 {
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.35;
}

.brand p,
.designer,
.site-footer,
.toolbar p,
summary small {
  color: var(--muted);
  font-size: 0.9rem;
}

.designer {
  display: grid;
  gap: 2px;
  text-align: left;
}

a {
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
}

.page-shell {
  display: grid;
  gap: 14px;
  padding-bottom: 24px;
}

.panel,
.chart-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.student-panel {
  padding: 0;
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 800;
}

.form-grid {
  display: grid;
  gap: 10px;
}

.student-grid {
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  padding: 0 14px 12px;
}

label {
  display: grid;
  gap: 5px;
  color: #26364d;
  font-size: 0.9rem;
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfdff;
  color: var(--ink);
  font: inherit;
  padding: 8px 10px;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(23, 105, 181, 0.12);
}

textarea {
  resize: vertical;
}

.wide-label {
  padding: 0 14px 14px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

button {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fbff;
  color: #1d3553;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 8px 11px;
}

button:hover {
  border-color: #9dc2ea;
  background: var(--blue-soft);
}

button.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

button.primary:hover {
  background: var(--blue-dark);
}

button.danger {
  border-color: #ffd0cc;
  background: var(--danger-soft);
  color: var(--danger);
}

.message {
  border-radius: 8px;
  padding: 10px 12px;
  background: #ecfdf5;
  color: #17613a;
  font-weight: 800;
}

.message.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.message:empty {
  display: none;
}

.charts-list {
  display: grid;
  gap: 14px;
}

.chart-card {
  padding: 14px;
}

.chart-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.chart-title-fields {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
  flex: 1;
}

.chart-body {
  display: grid;
  grid-template-columns: minmax(310px, 0.82fr) minmax(380px, 1.18fr);
  gap: 14px;
  align-items: start;
}

.settings-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 2px 0 10px;
  padding: 10px;
  border-radius: 8px;
  background: #f7fbff;
}

.settings-row label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
}

.settings-row input {
  width: auto;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  min-width: 330px;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 7px;
  text-align: center;
}

.data-table th {
  background: #eef6ff;
  color: #18385f;
  font-size: 0.86rem;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.data-table input {
  padding: 7px;
  text-align: center;
  direction: ltr;
}

.chart-actions {
  margin-top: 10px;
}

.conclusion-field {
  margin-top: 10px;
}

.canvas-frame {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  padding: 8px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #fff;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 7px 12px;
  padding: 0 0 24px;
  text-align: center;
}

.print-only {
  display: none;
}

@media (max-width: 940px) {
  .toolbar,
  .site-header,
  .chart-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .designer {
    text-align: right;
  }

  .student-grid,
  .chart-title-fields,
  .chart-body {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .student-grid,
  .chart-title-fields,
  .chart-body {
    grid-template-columns: 1fr;
  }

  .chart-card {
    padding: 12px;
  }
}

@media print {
  @page {
    size: A4 portrait;
    margin: 11mm 10mm 16mm;
  }

  body {
    background: white;
    color: black;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .no-print,
  .toolbar,
  .message,
  .site-footer {
    display: none !important;
  }

  .print-only {
    display: block !important;
  }

  .site-header {
    display: none;
  }

  .page-shell {
    width: 100%;
    gap: 9px;
    padding-bottom: 0;
  }

  .print-title {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 2px solid var(--blue);
    padding-bottom: 7px;
  }

  .print-title img {
    width: 42px;
    height: 42px;
    object-fit: contain;
  }

  .print-title h1 {
    font-size: 19px;
  }

  .print-title p {
    color: #475467;
    font-size: 12px;
  }

  .panel,
  .chart-card {
    box-shadow: none;
    border: 1px solid #d5dee9;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .student-panel {
    padding: 9px;
  }

  summary {
    padding: 0 0 7px;
    cursor: default;
  }

  .student-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 0;
  }

  .wide-label {
    padding: 8px 0 0;
  }

  input,
  textarea {
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
    color: black;
    font-weight: 800;
  }

  .chart-card {
    padding: 9px;
  }

  .chart-title-fields {
    grid-template-columns: repeat(2, 1fr);
  }

  .chart-body {
    grid-template-columns: 0.75fr 1.25fr;
    gap: 9px;
  }

  .settings-row {
    display: none;
  }

  .conclusion-field {
    margin-top: 6px;
  }

  .data-table {
    min-width: 0;
    font-size: 11px;
  }

  .data-table th,
  .data-table td {
    border: 1px solid #d5dee9;
    padding: 4px;
  }

  .canvas-frame {
    padding: 0;
  }

  .report-footer {
    position: fixed;
    right: 10mm;
    left: 10mm;
    bottom: 5mm;
    display: flex !important;
    justify-content: space-between;
    border-top: 1px solid #d5dee9;
    padding-top: 4px;
    color: #475467;
    font-size: 10.5px;
    font-weight: 700;
  }
}