/* ==========================================================================
   Skoolyst Ads — static prototype
   Design tokens pulled from the real Skoolyst design-system.css so this
   prototype reads as part of the same product family, not a separate brand.
   ========================================================================== */

:root {
  --color-primary: #0f4077;
  --color-primary-hover: #0a2d52;
  --color-primary-light: rgba(15, 64, 119, 0.08);

  --color-secondary: #4361ee;
  --color-secondary-hover: #3651d4;
  --color-secondary-light: rgba(67, 97, 238, 0.1);

  --color-neutral-bg: #f8fafb;
  --color-neutral-bg-alt: #f1f5f9;
  --color-neutral-border: #e2e8f0;
  --color-neutral-border-light: #f1f5f9;
  --color-neutral-text: #1e293b;
  --color-neutral-muted: #64748b;
  --color-neutral-muted-light: #94a3b8;

  --color-white: #ffffff;
  --color-success: #0d9488;
  --color-warning: #d97706;
  --color-danger: #dc2626;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 4px 10px rgba(15, 23, 42, 0.06), 0 16px 32px rgba(15, 23, 42, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-family);
  color: var(--color-neutral-text);
  background: var(--color-white);
  overflow-x: hidden;
}

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

::selection { background: var(--color-secondary-light); }

:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

.container-xl { max-width: 1140px; }

/* ---------- Navbar ---------- */
.sk-navbar {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-neutral-border-light);
}

.sk-brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--color-primary) !important;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.sk-brand .sk-brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  display: inline-block;
}

.sk-nav-link {
  color: var(--color-neutral-text) !important;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.9rem !important;
}

.sk-nav-link:hover { color: var(--color-primary) !important; }

.btn-sk-outline {
  border: 1.5px solid var(--color-neutral-border);
  color: var(--color-neutral-text);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.5rem 1.1rem;
  background: transparent;
}
.btn-sk-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-sk-primary {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.5rem 1.2rem;
  border: none;
}
.btn-sk-primary:hover { background: var(--color-primary-hover); color: var(--color-white); }

.btn-sk-ghost-light {
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1.3rem;
  border: 1.5px solid rgba(255,255,255,0.4);
  background: transparent;
}
.btn-sk-ghost-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); color: #fff; }

/* ---------- Hero ---------- */
.sk-hero {
  background: linear-gradient(165deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: var(--color-white);
  padding: 4.5rem 0 5.5rem;
  position: relative;
}

.sk-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
  pointer-events: none;
}

.sk-hero h1 {
  font-weight: 800;
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  max-width: 720px;
}

.sk-hero p.lead {
  color: rgba(255,255,255,0.82);
  max-width: 560px;
  font-size: 1.05rem;
}

/* ---------- Section shell ---------- */
.sk-section { padding: 4rem 0; }
.sk-section-alt { background: var(--color-neutral-bg); }

.sk-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
  display: inline-block;
}

.sk-section-title {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-neutral-text);
}

.sk-section-sub {
  color: var(--color-neutral-muted);
  max-width: 640px;
}

/* ---------- Sponsored label ---------- */
.sponsored-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-neutral-muted);
  background: var(--color-neutral-bg-alt);
  border: 1px solid var(--color-neutral-border);
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
}

.sponsored-label .pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  position: relative;
}
.sponsored-label .pulse-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--color-success);
  opacity: 0.35;
  animation: sk-pulse 2s ease-out infinite;
}
@keyframes sk-pulse {
  0% { transform: scale(0.6); opacity: 0.5; }
  100% { transform: scale(2.1); opacity: 0; }
}

/* ---------- Main ad card ---------- */
.ad-card {
  background: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.ad-card:hover { box-shadow: var(--shadow-card-hover); }

.ad-card__inner {
  display: flex;
  flex-direction: row;
}

.ad-card__media {
  flex: 0 0 42%;
  max-width: 42%;
  background: var(--color-neutral-bg-alt);
}

.ad-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  min-height: 220px;
}

.ad-card__body {
  flex: 1;
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.ad-card__advertiser {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.ad-card__title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-neutral-text);
  letter-spacing: -0.01em;
  margin: 0;
}

.ad-card__desc {
  color: var(--color-neutral-muted);
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0;
}

.ad-card__cta-row {
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-ad-cta {
  background: var(--color-warning);
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius-sm);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.btn-ad-cta:hover { background: #b8630a; color: var(--color-white); }

.ad-card__url {
  font-size: 0.78rem;
  color: var(--color-neutral-muted-light);
}

.btn-load-another {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  background: none;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0;
}
.btn-load-another:hover { color: var(--color-primary-hover); }
.btn-load-another .bi { transition: transform 0.35s ease; }
.btn-load-another.is-loading .bi { transform: rotate(180deg); }

/* Mobile ad card */
@media (max-width: 767.98px) {
  .ad-card__inner { flex-direction: column; }
  .ad-card__media { max-width: 100%; flex-basis: auto; }
  .ad-card__media img { min-height: 180px; }
  .ad-card__body { padding: 1.4rem 1.25rem; }
}

/* ---------- Placement previews ---------- */
.placement-card {
  border: 1px dashed var(--color-neutral-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: var(--color-white);
  height: 100%;
}

.placement-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-neutral-muted);
  background: var(--color-neutral-bg-alt);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  display: inline-block;
  margin-bottom: 0.6rem;
}

.placement-ad {
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-white);
}

.placement-ad img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

.placement-ad__body { padding: 0.85rem 1rem; }

.placement-ad__title {
  font-size: 0.92rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
}

.placement-ad__desc {
  font-size: 0.8rem;
  color: var(--color-neutral-muted);
  margin: 0 0 0.6rem;
}

.placement-ad__cta {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-warning);
  text-decoration: none;
}

/* ---------- API preview ---------- */
.api-preview-wrap {
  background: #0a0e1a;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
}

.api-preview-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.api-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.9rem;
  position: relative;
}

.api-preview-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}
.api-preview-dots span:nth-child(1) { background: #ff5f56; }
.api-preview-dots span:nth-child(2) { background: #ffbd2e; }
.api-preview-dots span:nth-child(3) { background: #27c93f; }

.api-preview-endpoint {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #94a3b8;
}

pre.api-preview-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: #cbd5e1;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  position: relative;
  max-height: 380px;
  overflow-y: auto;
}

.api-preview-code .tok-key { color: #7dd3fc; }
.api-preview-code .tok-str { color: #86efac; }
.api-preview-code .tok-num { color: #fca5a5; }
.api-preview-code .tok-bool { color: #f0abfc; }

/* ---------- App badges ---------- */
.app-badge {
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1rem;
  text-align: center;
  background: var(--color-white);
  height: 100%;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.app-badge:hover { border-color: var(--color-secondary); transform: translateY(-2px); }

.app-badge__icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.6rem;
  font-weight: 800;
  font-size: 1rem;
}

.app-badge__name {
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0;
}

/* ---------- Footer ---------- */
.sk-footer {
  background: var(--color-primary-hover);
  color: rgba(255,255,255,0.75);
  padding: 3rem 0 1.5rem;
}

.sk-footer h3 {
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
}

.sk-footer a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
}
.sk-footer a:hover { color: #fff; }

.sk-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: 2rem;
  padding-top: 1.25rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
}

.sk-footer .bi {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ============ AUTH PAGES (login.php / signup.php) ============ */
.sk-auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-neutral-bg);
  padding: 2rem 1rem;
}

.sk-auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-white);
  border: 1px solid var(--color-neutral-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 2.25rem 2rem;
}

.sk-auth-card .sk-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.sk-auth-card h1 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-neutral-text);
  margin-bottom: 0.25rem;
}

.sk-auth-card p.sk-auth-sub {
  color: var(--color-neutral-muted);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

.sk-auth-card label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-neutral-text);
  margin-bottom: 0.35rem;
}

.sk-auth-card .form-control {
  border-radius: var(--radius-sm);
  border-color: var(--color-neutral-border);
  padding: 0.6rem 0.85rem;
  font-size: 0.95rem;
}

.sk-auth-card .form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.sk-auth-alert {
  display: none;
  font-size: 0.88rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.1rem;
}

.sk-auth-alert--error {
  background: rgba(220, 38, 38, 0.08);
  color: var(--color-danger);
  border: 1px solid rgba(220, 38, 38, 0.18);
}

.sk-auth-alert--success {
  background: rgba(13, 148, 136, 0.08);
  color: var(--color-success);
  border: 1px solid rgba(13, 148, 136, 0.18);
}

.sk-auth-footer {
  text-align: center;
  margin-top: 1.35rem;
  font-size: 0.88rem;
  color: var(--color-neutral-muted);
}

.sk-auth-footer a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.sk-auth-footer a:hover { text-decoration: underline; }