/* =========================================================
   Grandma Sudoku – Static Website Styles
   ========================================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:          #f9f6ff;
  --color-bg-alt:      #ede5f8;
  --color-surface:     #ffffff;
  --color-primary:     #8c60c0;
  --color-primary-dk:  #6a3fa8;
  --color-accent:      #e87baa;
  --color-text:        #2a2030;
  --color-text-light:  #5a4870;
  --color-border:      #d0c0e8;
  --color-badge-bg:    #e8dcff;
  --color-badge-text:  #6a3fa8;
  --radius:            12px;
  --radius-sm:         8px;
  --shadow:            0 4px 20px rgba(0,0,0,0.08);
  --shadow-card:       0 2px 10px rgba(0,0,0,0.07);
  --font:              'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-w:             900px;
  --transition:        0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1.05rem;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dk);
}

img {
  max-width: 100%;
}

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Skip link (accessibility) ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
  text-decoration: none;
}
.skip-link:focus {
  top: 1rem;
}

/* ---------- Header / Hero ---------- */
.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dk) 100%);
  color: #fff;
  padding: 3.5rem 0 2.5rem;
  text-align: center;
}

.app-icon {
  width: 100px;
  height: 100px;
  border-radius: 22px;
  margin-bottom: 1.2rem;
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
  display: inline-block;
  overflow: hidden;
}

.app-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.site-header h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.25rem;
}

.header-subtitle {
  font-size: 1.1rem;
  opacity: 0.88;
  margin-bottom: 1.4rem;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  backdrop-filter: blur(4px);
}

/* ---------- Nav ---------- */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.site-nav .container {
  display: flex;
  gap: 0.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  overflow-x: auto;
}

.site-nav a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-light);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--color-badge-bg);
  color: var(--color-primary);
}

/* ---------- Main content ---------- */
main {
  padding: 3rem 0 4rem;
}

/* ---------- Sections ---------- */
section {
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dk);
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--color-accent);
  border-radius: 2px;
  flex-shrink: 0;
}

/* ---------- Description card ---------- */
.description-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  border: 1px solid var(--color-border);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ---------- Feature & Settings grids ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.25rem 1.4rem;
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.feature-card p {
  font-size: 0.97rem;
  color: var(--color-text);
  line-height: 1.55;
}

/* ---------- Settings list ---------- */
.settings-list {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.settings-list li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.4rem;
  list-style: none;
  font-size: 0.98rem;
  border-bottom: 1px solid var(--color-bg-alt);
}

.settings-list li:last-child {
  border-bottom: none;
}

.settings-list .s-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* ---------- Commitment / positioning strip ---------- */
.commitment-strip {
  background: linear-gradient(135deg, var(--color-badge-bg), #f2ecff);
  border: 1px solid #c8b0e8;
  border-radius: var(--radius);
  padding: 2rem;
}

.commitment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.commitment-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1rem;
  box-shadow: var(--shadow-card);
}

.commitment-item .ci-icon {
  font-size: 2rem;
}

.commitment-item strong {
  font-size: 0.95rem;
  color: var(--color-primary-dk);
}

.commitment-item span {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ---------- Platform tags ---------- */
.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.platform-tag {
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.88rem;
  font-weight: 600;
}

/* ---------- CTA button ---------- */
.cta-wrapper {
  text-align: center;
  margin-top: 2rem;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(123,94,167,0.4);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-cta:hover {
  background: var(--color-primary-dk);
  color: #fff;
  box-shadow: 0 6px 18px rgba(92,64,128,0.45);
  transform: translateY(-1px);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-text);
  color: #c8c0bc;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

.site-footer a {
  color: #e0d8f8;
}

.site-footer p + p {
  margin-top: 0.4rem;
}

/* ---------- Privacy-policy page specific ---------- */
.policy-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 2.5rem;
}

.policy-content h2 {
  font-size: 1.25rem;
  color: var(--color-primary-dk);
  margin: 2rem 0 0.75rem;
}

.policy-content h2:first-child {
  margin-top: 0;
}

.policy-content p,
.policy-content li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

.policy-content ul,
.policy-content ol {
  margin-left: 1.4rem;
  margin-bottom: 0.5rem;
}

.policy-content ul li {
  margin-bottom: 0.3rem;
}

.policy-meta {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.highlight-box {
  background: #f0eaff;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.98rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .policy-content {
    padding: 1.5rem 1.25rem;
  }

  .description-card {
    padding: 1.4rem;
  }

  .commitment-strip {
    padding: 1.4rem;
  }
}