/* =====================================================
   SL SOFTWARE — Main Stylesheet
   Dark theme, modern, clean
   ===================================================== */

:root {
  --bg-primary:    #1a1e2e;
  --bg-secondary:  #222741;
  --bg-card:       #252b40;
  --bg-nav:        #161929;
  --accent:        #5b8dee;
  --accent-hover:  #7aa3f5;
  --accent-glow:   rgba(91, 141, 238, 0.25);
  --text-primary:  #e8eaf6;
  --text-muted:    #8892b0;
  --text-dim:      #6272a4;
  --border:        #2e3554;
  --border-accent: #3d4f7c;
  --success:       #50fa7b;
  --danger:        #ff5555;
  --warning:       #ffb86c;
  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     18px;
  --shadow-card:   0 4px 24px rgba(0,0,0,0.35);
  --shadow-glow:   0 0 20px rgba(91,141,238,0.18);
  --transition:    0.25s ease;
  --font-main:     'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

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

h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

p { margin-bottom: 1rem; color: var(--text-primary); }

/* ── Navigation ── */
.navbar {
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-brand .brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-brand .brand-name span {
  color: var(--accent);
}

.nav-brand .brand-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.25rem;
}

.nav-links > li {
  position: relative;
}

.nav-links a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-links a.active {
  color: var(--accent);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.dropdown-toggle::after {
  content: '›';
  display: inline-block;
  margin-left: 0.35rem;
  font-size: 1rem;
  transition: transform var(--transition);
}

.nav-dropdown:hover .dropdown-toggle::after {
  transform: rotate(90deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  min-width: 220px;
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  box-shadow: var(--shadow-card);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: block;
  white-space: nowrap;
}

.dropdown-menu .dropdown-section {
  padding: 0.25rem 0.75rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-top: 0.5rem;
}

.dropdown-menu .sub-item {
  padding-left: 1.25rem !important;
  font-size: 0.82rem !important;
  color: var(--text-dim) !important;
}

.dropdown-menu .sub-item:hover {
  color: var(--text-primary) !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Page wrapper ── */
.page-content { flex: 1; }

/* ── Hero ── */
.hero {
  position: relative;
  padding: 6rem 2rem 5rem;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(91,141,238,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(100,180,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent), #a0c4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 16px rgba(91,141,238,0.35);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  box-shadow: 0 0 24px rgba(91,141,238,0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-accent);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* ── Section wrappers ── */
.section {
  padding: 4rem 2rem;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 1.9rem;
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1rem;
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* ── Cards ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #a0c4ff);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.card:hover::before { opacity: 1; }

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.4rem;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-accent { background: var(--accent-glow); color: var(--accent); border: 1px solid var(--border-accent); }
.badge-success { background: rgba(80,250,123,0.12); color: var(--success); }
.badge-muted   { background: var(--bg-secondary); color: var(--text-muted); }

/* ── Features strip ── */
.features-strip {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  padding: 3rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.feature-icon {
  font-size: 2rem;
  background: var(--accent-glow);
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.feature-item p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}

/* ── Contact form ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h3 { font-size: 1.3rem; margin-bottom: 1rem; }
.contact-info p  { font-size: 0.875rem; color: var(--text-muted); }

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.contact-info-item .icon {
  font-size: 1.2rem;
  margin-top: 0.1rem;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-control {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.65rem 0.9rem;
  font-size: 0.925rem;
  font-family: var(--font-main);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder { color: var(--text-dim); }

textarea.form-control { resize: vertical; min-height: 130px; }

.captcha-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.captcha-row img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  height: 50px;
}

.captcha-row .captcha-input { max-width: 160px; }

.captcha-hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  width: 100%;
}

/* ── Messages / Alerts ── */
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  border-left: 3px solid transparent;
}

.alert-success { background: rgba(80,250,123,0.1); border-color: var(--success); color: var(--success); }
.alert-error   { background: rgba(255,85,85,0.1);  border-color: var(--danger);  color: var(--danger); }
.alert-info    { background: var(--accent-glow);   border-color: var(--accent);  color: var(--accent); }

/* ── Page hero (inner pages) ── */
.page-hero {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 2rem;
}

.page-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.page-hero h1 { font-size: clamp(1.6rem, 3vw, 2.5rem); margin-bottom: 0.5rem; }
.page-hero p  { color: var(--text-muted); margin: 0; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: 0.5; }

/* ── Prose content ── */
.prose {
  max-width: 820px;
  color: var(--text-primary);
}

.prose h2 { font-size: 1.5rem; margin: 2rem 0 0.75rem; color: var(--text-primary); }
.prose h3 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; color: var(--text-primary); }
.prose p  { color: var(--text-muted); line-height: 1.8; margin-bottom: 1rem; }
.prose ul, .prose ol { margin: 0.5rem 0 1rem 1.5rem; color: var(--text-muted); }
.prose li { margin-bottom: 0.4rem; line-height: 1.7; }
.prose a  { color: var(--accent); }
.prose a:hover { color: var(--accent-hover); }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* ── App detail ── */
.app-header {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.app-icon-large {
  width: 80px; height: 80px;
  border-radius: var(--radius-md);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  flex-shrink: 0;
  border: 1px solid var(--border-accent);
}

.app-store-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
}

.store-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.sub-pages-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.sub-pages-list li a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.sub-pages-list li a:hover {
  border-color: var(--border-accent);
  color: var(--accent);
}

/* ── Posts ── */
.post-card {
  display: flex;
  flex-direction: column;
}

.post-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.post-content-area { line-height: 1.85; }

/* ── Footer ── */
footer {
  background: var(--bg-nav);
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem 1.5rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand .brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.footer-brand .brand-name span { color: var(--accent); }
.footer-brand p { font-size: 0.82rem; color: var(--text-dim); margin: 0; }

.footer-col h5 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 0.85rem;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.45rem; }
.footer-col ul li a { font-size: 0.85rem; color: var(--text-muted); }
.footer-col ul li a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-bottom p { font-size: 0.78rem; color: var(--text-dim); margin: 0; }
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--accent); }

/* ── Thanks page ── */
.thanks-box {
  text-align: center;
  padding: 4rem 2rem;
  max-width: 540px;
  margin: 4rem auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.thanks-icon { font-size: 3.5rem; margin-bottom: 1rem; }
.thanks-box h1 { font-size: 1.8rem; margin-bottom: 0.75rem; }
.thanks-box p  { color: var(--text-muted); margin-bottom: 1.5rem; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .contact-layout  { grid-template-columns: 1fr; }
  .footer-grid     { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .nav-links {
    position: fixed;
    inset: 64px 0 0;
    background: var(--bg-nav);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 0.25rem;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    border-top: 1px solid var(--border);
  }

  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: flex; }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0 0 0 1rem;
  }

  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 4rem 1.25rem 3rem; }
  .form-card { padding: 1.5rem; }
}

/* ── Utilities ── */
.text-accent  { color: var(--accent); }
.text-muted   { color: var(--text-muted); }
.text-center  { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }