/* =========================
   Novizun Landing Styles
   Tech: HTML5/CSS3/JS (no frameworks)
   Palette: primary #ee4d2d, secondary #667eea, accent #4caf50
   ========================= */

/* Variables */
:root {
  --color-primary: #ee4d2d;
  --color-primary-700: #c53f24;
  --color-secondary: #667eea;
  --color-secondary-700: #4c51bf;
  --color-accent: #4caf50;

  --color-text: #333333;
  --color-text-muted: #666666;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-bg-soft: #fafafa;
  --color-border: #e5e7eb;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);

  --container-max: 1200px;
  --container-pad: 16px;

  --font-headings: "Segoe UI", Arial, sans-serif;
  --font-body: Arial, "Helvetica Neue", sans-serif;

  --transition-fast: 150ms ease;
  --transition-med: 250ms ease;

  --focus-ring: 2px solid var(--color-accent);
}

/* Base reset */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; height: auto; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5rem;
  font-family: var(--font-headings);
  color: var(--color-text);
}
p { margin: 0 0 1rem; color: var(--color-text-muted); }

a { color: var(--color-secondary-700); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Container */
.container {
  width: min(var(--container-max), 100% - 2 * var(--container-pad));
  margin-inline: auto;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 8px 12px;
  background: var(--color-bg);
  border: 2px solid var(--color-secondary);
  z-index: 9999;
}

/* Header */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  gap: 12px;
}
.brand-link {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  color: var(--color-primary-700);
}
.top-nav ul {
  list-style: none;
  display: flex;
  gap: 14px;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}
.top-nav a {
  display: inline-block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
}
.top-nav a:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }

/* Hero */
.hero {
  position: relative;
  color: #fff;
  background:
    radial-gradient(1200px 600px at 10% 10%, rgba(255,255,255,0.08), transparent 60%),
    linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
}
@media (min-width: 1200px) {
  .hero { min-height: 80vh; }
}
.hero-inner { padding: 56px 0; }
.hero-content { max-width: 850px; margin: 0 auto; padding: 0 8px; }
.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.15;
  margin-bottom: 12px;
  color: #fff;
  font-weight: 800;
}
.hero .subheadline {
  font-size: clamp(16px, 2.2vw, 20px);
  color: #eef2ff;
}
.trust-badge {
  margin-top: 8px;
  font-weight: 600;
  color: #fff;
}
.cta-row {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  --btn-bg: #fff;
  --btn-fg: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 5px;
  border: 2px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
  will-change: transform;
}
.btn:hover { transform: translateY(-1px) scale(1.02); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-700); box-shadow: var(--shadow-md); }

.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: #e9e9ff;
}
.hero .btn-secondary { border-color: #e9e9ff; color: #fff; }
.section .btn-secondary {
  border-color: var(--color-secondary);
  color: var(--color-secondary-700);
}
.btn-secondary:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255,255,255,0.12);
}

/* Sections */
.section { padding: 56px 0; background: var(--color-bg); }
.section:nth-of-type(even) { background: var(--color-bg-soft); }
.section-header { text-align: center; margin-bottom: 18px; }
.section h2 {
  font-size: clamp(28px, 3.4vw, 36px);
  font-weight: 800;
}
.section-subtitle { color: var(--color-text-muted); }

/* Features */
.feature-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 16px;
}
@media (min-width: 992px) {
  .feature-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
}
.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-align: left;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.feature-icon { font-size: 22px; }

/* Product tabs */
.product-tabs {
  margin: 8px 0 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tab-btn {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.tab-btn:hover { transform: translateY(-1px); }
.tab-btn[aria-selected="true"] {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #fff;
}
.tab-btn:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }

/* Product grid */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 768px) {
  .product-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (min-width: 1200px) {
  .product-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
.no-results {
  margin-top: 8px;
  text-align: center;
  color: var(--color-text-muted);
}

/* Product card */
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 15px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
  height: 100%;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.product-image {
  border-radius: calc(var(--radius-md) - 2px);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  background: var(--color-bg-alt);
  margin-bottom: 10px;
}
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 1200px) {
  .product-card .product-image {
    /* Reduce image size by 30% on large screens to help fit 2 rows x 3 columns per viewport */
    width: 70%;
    margin: 0 auto 10px;
  }
}

.product-title {
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 4px 0;
}

.product-price {
  color: var(--color-primary);
  font-weight: 800;
  margin-top: 2px;
}

.product-desc {
  color: var(--color-text-muted);
  margin: 8px 0 12px;
}

.card-actions {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.card-actions .btn {
  flex: 1 1 auto;
}

/* Testimonials */
.testimonials-scroller {
  margin-top: 12px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 85%;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
}
@media (min-width: 768px) {
  .testimonials-scroller { grid-auto-columns: 45%; }
}
@media (min-width: 1200px) {
  .testimonials-scroller {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
  }
}
.testimonial-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  scroll-snap-align: center;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.testimonial-card img {
  width: 100%;
  height: 220px;
  object-fit: contain;
}
.view-link {
  display: inline-block;
  padding: 10px 12px;
  color: var(--color-secondary-700);
  font-weight: 700;
}

/* School proof (institutional testimonial) */
.school-proof {
  margin-top: 16px;
}
.proof-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 6px 0 10px;
  color: var(--color-text);
}
.proof-figure {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.proof-figure img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: contain;
  background: var(--color-bg-alt);
}
.proof-figure figcaption {
  padding: 12px;
  display: grid;
  gap: 10px;
}
.proof-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.proof-link-div{
  display: flex;
  align-items: center;
}
.proof-link {
  font-weight: 700;
  color: var(--color-secondary-700);
}
.proof-link:hover { text-decoration: underline; }
.proof-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.proof-disclaimer {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
/* B2B Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
  margin: 12px 0 16px;
}
@media (min-width: 768px) {
  .benefits-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
}
.benefit {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
  font-weight: 700;
}

/* Form */
.inquiry-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}
@media (min-width: 768px) {
  .inquiry-form { padding: 18px; }
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
}
.inquiry-form label {
  font-weight: 700;
  color: var(--color-text);
}
.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.inquiry-form textarea { resize: vertical; }
.inquiry-form input:focus,
.inquiry-form select:focus,
.inquiry-form textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.25);
}
.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.form-status {
  min-height: 1.25rem;
  font-weight: 700;
}
.form-status.success { color: var(--color-accent); }
.form-status.error { color: var(--color-primary); }
.privacy-note { font-size: 0.9rem; color: var(--color-text-muted); }

/* Footer */
.site-footer {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 22px 0;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
.footer-col h3 {
  font-size: 1.1rem;
  font-weight: 800;
}
.footer-col ul {
  list-style: none;
  padding: 0; margin: 0;
}
.footer-col li { margin-bottom: 6px; }
.trust-list li { font-weight: 600; }
.bottom-bar {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}
.bottom-inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  flex-wrap: wrap;
}

/* Accessibility helpers */
:focus-visible { outline: var(--focus-ring); outline-offset: 2px; }
[aria-busy="true"] { opacity: 0.8; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn,
  .feature-card,
  .product-card { transition: none; }
  .btn:hover,
  .feature-card:hover,
  .product-card:hover { transform: none; }
}