@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@500;700;800&family=Fraunces:opsz,wght@9..144,700&display=swap');

:root {
  --bg-1: #f6f8ef;
  --bg-2: #e9f1df;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #1f2f1f;
  --muted: #5f6d60;
  --line: #dde6d6;
  --brand: #2f7d32;
  --brand-2: #3f943d;
  --coran: #b77721;
  --shadow: 0 10px 30px rgba(43, 85, 43, 0.14);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Manrope', 'Segoe UI', sans-serif;
  color: var(--text);
  min-height: 100vh;
  padding: 12px;
  background:
    radial-gradient(
      circle at 10% 20%,
      rgba(83, 173, 92, 0.14),
      transparent 36%
    ),
    radial-gradient(
      circle at 90% 0%,
      rgba(199, 150, 91, 0.13),
      transparent 30%
    ),
    linear-gradient(165deg, var(--bg-1), var(--bg-2));
}

h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.15rem, 2.6vw, 1.65rem);
  font-weight: 700;
  color: #1a3f1f;
  text-align: center;
  margin-bottom: 12px;
  padding: 14px 12px;
  background: linear-gradient(130deg, #ffffff, #f8fbf4);
  border: 1px solid #d8e6d4;
  border-radius: 16px;
  letter-spacing: 0.01em;
  box-shadow: var(--shadow);
  animation: rise 0.55s ease;
}

.top-nav-wrap {
  margin: 0 auto 16px;
  max-width: 860px;
  position: sticky;
  top: 8px;
  z-index: 20;
}

.top-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px;
  border-radius: 16px;
  border: 1px solid #d6e4d5;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 22px rgba(37, 73, 37, 0.11);
  scrollbar-width: thin;
  scrollbar-color: #c4d6c0 transparent;
}

.top-nav::-webkit-scrollbar {
  height: 6px;
}

.top-nav::-webkit-scrollbar-thumb {
  background: #c4d6c0;
  border-radius: 999px;
}

.top-link {
  display: inline-block;
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 800;
  color: #315134;
  background: #f8fbf6;
  border: 1px solid #d8e6db;
  border-radius: 999px;
  padding: 8px 14px;
  white-space: nowrap;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease,
    background 0.2s ease;
}

.top-link:hover {
  transform: translateY(-1px);
  color: #1f3f22;
  box-shadow: 0 6px 14px rgba(47, 125, 50, 0.16);
}

.top-link.active {
  color: #fff;
  background: linear-gradient(125deg, var(--brand), var(--brand-2));
  border-color: transparent;
  box-shadow: 0 8px 14px rgba(47, 125, 50, 0.26);
}

.page-section,
.calc-shell {
  max-width: 860px;
  margin: 0 auto;
}

.grid-shell,
.res-section,
.subject-card,
.parents-space {
  background: var(--surface);
  border: 1px solid #dbe7d7;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.grid-shell {
  padding: 14px;
  margin-bottom: 12px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.col-head {
  text-align: center;
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  padding: 8px;
  border-radius: 10px;
  margin-bottom: 8px;
}

.col-arabe {
  background: #dff1df;
  color: #1f6432;
}

.col-coran {
  background: #f8e8cf;
  color: #8a5715;
}

.case {
  background: #fff;
  border-radius: 12px;
  padding: 11px 8px;
  text-align: center;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    border-color 0.16s ease,
    background 0.16s ease;
  -webkit-tap-highlight-color: transparent;
}

.case:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 14px rgba(56, 93, 56, 0.12);
}

.case .lbl {
  font-size: 0.68rem;
  color: #7e8b80;
  margin-bottom: 3px;
}

.case .num {
  font-size: 1.05rem;
  font-weight: 800;
  color: #1f2f1f;
}

.case.on-a {
  border-color: var(--brand);
  background: #ebf8ec;
}

.case.on-c {
  border-color: var(--coran);
  background: #fdf3e5;
}

.case.on-a .num {
  color: #1f6432;
}

.case.on-c .num {
  color: #8a5715;
}

.subject-params {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

.subject-card {
  padding: 12px;
}

.subject-title {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 9px;
}

.subject-a .subject-title {
  color: #1f6432;
}

.subject-c .subject-title {
  color: #8a5715;
}

.params-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.param-box {
  flex: 1;
  min-width: 0;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
}

.param-box label {
  display: block;
  font-size: 0.69rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #718171;
  margin-bottom: 6px;
}

.param-box input,
.param-box select,
.param-box select option {
  width: 100%;
  padding: 9px 10px;
  border: 1.5px solid #cfdbc8;
  border-radius: 9px;
  font-size: 1.05rem;
  font-weight: 800;
  text-align: center;
  font-family: inherit;
  color: #1f2f1f;
  background: #fbfdf8;
}

.param-box input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(47, 125, 50, 0.14);
}

.btn-form-reset,
.btn-reset,
.doc-btn {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.btn-form-reset {
  width: 100%;
  padding: 12px;
  background: #ffffff;
  border: 1.5px solid #d5dfcf;
  border-radius: 12px;
  color: #334634;
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
  font-family: inherit;
  margin-bottom: 12px;
}

.btn-form-reset:hover,
.btn-reset:hover,
.doc-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 14px rgba(45, 82, 47, 0.15);
}

.btn-form-reset:active,
.btn-reset:active,
.doc-btn:active {
  transform: translateY(0);
}

#result {
  display: none;
}

.res-section {
  padding: 14px;
  margin-bottom: 10px;
}

.res-title {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.res-title.a {
  color: #1f6432;
}

.res-title.c {
  color: #8a5715;
}

.res-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 0.91rem;
  border-bottom: 1px solid #eef4ea;
}

.res-row:last-child {
  border: none;
}

.res-row .rl {
  color: var(--muted);
}

.res-row .rv {
  font-weight: 800;
  color: #1f2f1f;
}

.res-row.big .rv {
  font-size: 1.15rem;
  color: var(--brand);
}

.res-row.big {
  padding-top: 10px;
}

.chq-box {
  background: #fffbf2;
  border: 1.5px solid #efd482;
  border-radius: 10px;
  padding: 11px 12px;
  margin-top: 8px;
}

.chq-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #a57720;
  margin-bottom: 6px;
}

.chq-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  padding: 3px 0;
}

.chq-row .cl {
  color: #7f877e;
}

.chq-row .cv {
  font-weight: 800;
  color: #1f2f1f;
}

.total-bar {
  background: linear-gradient(130deg, var(--brand), var(--brand-2));
  color: #fff;
  border-radius: 14px;
  padding: 15px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  box-shadow: 0 12px 20px rgba(48, 128, 52, 0.26);
}

.total-bar .tl {
  font-size: 0.8rem;
  font-weight: 700;
  opacity: 0.9;
}

.total-bar .tv {
  font-size: 1.4rem;
  font-weight: 900;
}

.btn-reset {
  width: 100%;
  padding: 12px;
  background: #ffffff;
  border: 1.5px solid #d8e1d4;
  border-radius: 12px;
  color: #455446;
  font-size: 0.89rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}

.parents-space {
  margin-top: 16px;
  padding: 15px;
  animation: rise 0.45s ease;
}

.parents-space h2 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.1rem;
  color: #1d4322;
  margin-bottom: 8px;
}

.parents-intro {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

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

.parents-card {
  border: 1px solid #e1ebde;
  border-radius: 12px;
  padding: 12px;
  background: #fcfffa;
}

.parents-card h3 {
  font-size: 0.86rem;
  color: #1f4625;
  margin-bottom: 7px;
  font-weight: 800;
}

.parents-card p {
  font-size: 0.86rem;
  color: #546456;
  margin-bottom: 8px;
}

.doc-actions {
  display: grid;
  gap: 8px;
}

.doc-btn {
  display: block;
  text-decoration: none;
  text-align: center;
  background: linear-gradient(125deg, var(--brand), var(--brand-2));
  color: #fff;
  border-radius: 10px;
  padding: 10px 11px;
  font-size: 0.84rem;
  font-weight: 800;
  border: 1px solid transparent;
}

.doc-btn.secondary {
  background: #edf5ea;
  color: #1f5f2f;
  border: 1px solid #c9e2cf;
}

.info-list {
  margin-left: 18px;
  color: #4a584b;
  font-size: 0.86rem;
  line-height: 1.45;
}

.info-list li + li {
  margin-top: 6px;
}

.alert-note {
  margin-top: 12px;
  border: 1.5px solid #ca3e32;
  border-left-width: 7px;
  border-radius: 12px;
  background: #fff2ef;
  padding: 11px 12px;
}

.alert-note p {
  color: #7a1d17;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
}

.alert-note p + p {
  margin-top: 8px;
}

@media (min-width: 740px) {
  body {
    padding: 18px;
  }

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

  .params-row {
    gap: 12px;
  }
}

@media (max-width: 560px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

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

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}