/* ============================================================
   PARAFUDR.COM — Main Stylesheet
   Vercel/Linear minimal mühendislik estetiği
   ============================================================ */

/* ── 1. CSS Variables ── */
:root {
  --color-bg: #ffffff;
  --color-bg-subtle: #fafafa;
  --color-bg-muted: #f4f4f5;

  --color-fg: #0a0a0a;
  --color-fg-muted: #525252;
  --color-fg-subtle: #737373;

  --color-brand: #0a2540;
  --color-brand-hover: #0d3a5e;
  --color-accent: #fbbf24;
  --color-accent-hover: #f59e0b;

  --color-whatsapp: #25d366;
  --color-whatsapp-hover: #1da851;

  --color-success: #16a34a;
  --color-error: #dc2626;
  --color-warning: #ea580c;

  --color-border: #e5e5e5;
  --color-border-strong: #d4d4d4;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --leading-tight: 1.1;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 10px 10px -5px rgba(0,0,0,.04);

  --content-width: 1120px;
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a0a0a;
    --color-bg-subtle: #111111;
    --color-bg-muted: #1a1a1a;
    --color-fg: #fafafa;
    --color-fg-muted: #a3a3a3;
    --color-fg-subtle: #737373;
    --color-border: #262626;
    --color-border-strong: #404040;
  }
}

/* ── 2. Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  color: var(--color-fg);
  background: var(--color-bg);
  line-height: var(--leading-relaxed);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select, button { font-family: inherit; }
ul, ol { list-style: none; }

/* ── 3. Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  color: var(--color-fg);
}

h1 { font-size: clamp(2.5rem, 5vw, var(--text-6xl)); }
h2 { font-size: clamp(1.75rem, 3vw, var(--text-4xl)); letter-spacing: -0.02em; }
h3 { font-size: var(--text-2xl); font-weight: var(--weight-semibold); }
h4 { font-size: var(--text-xl); font-weight: var(--weight-semibold); }

p { line-height: var(--leading-relaxed); color: var(--color-fg-muted); }
p.lead { font-size: var(--text-lg); color: var(--color-fg-muted); }

/* ── 4. Layout ── */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }
.section-lg { padding: 7rem 0; }

/* ── 5. Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.375rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  transition: all var(--transition-base);
  border: 1.5px solid transparent;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
  cursor: pointer;
  letter-spacing: -0.01em;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 0.5rem 0.875rem;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-primary {
  background: var(--color-brand);
  color: #fff;
  border-color: var(--color-brand);
}
.btn-primary:hover {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-border-strong);
}
.btn-outline:hover {
  border-color: var(--color-fg);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #fff;
  border-color: var(--color-whatsapp);
}
.btn-whatsapp:hover {
  background: var(--color-whatsapp-hover);
  border-color: var(--color-whatsapp-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(37,211,102,.35);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-brand);
  border-color: var(--color-accent);
  font-weight: var(--weight-bold);
}
.btn-accent:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(251,191,36,.35);
}

/* ── 6. Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-brand {
  background: rgba(10,37,64,.08);
  color: var(--color-brand);
  border: 1px solid rgba(10,37,64,.15);
}

.badge-accent {
  background: rgba(251,191,36,.15);
  color: #92400e;
  border: 1px solid rgba(251,191,36,.3);
}

/* ── 7. Header & Navigation ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(10,10,10,.9); }
}

.site-header.scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 2rem;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img {
  height: 38px;
  width: auto;
  display: block;
}

@media (prefers-color-scheme: dark) {
  .logo-text { color: #fafafa; }
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.header-nav a {
  padding: 0.375rem 0.875rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-fg-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.header-nav a:hover {
  color: var(--color-fg);
  background: var(--color-bg-muted);
}

.header-nav .nav-dropdown { position: relative; }

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

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 0.5rem;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  z-index: 200;
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
}

.dropdown-menu a:hover {
  color: var(--color-brand);
  background: var(--color-bg-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-wa {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-whatsapp);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.header-wa:hover { opacity: .75; }

.header-phone {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-fg-muted);
  transition: color var(--transition-fast);
}

.header-phone:hover { color: var(--color-brand); }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 4px;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  height: 2px;
  background: var(--color-fg);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ── 8. Hero Section ── */
.hero {
  padding: 6rem 0 5rem;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-brand) 60%, transparent 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content { max-width: 600px; }

.hero-badge { margin-bottom: 1.5rem; }

.hero-title {
  font-size: clamp(2.75rem, 5vw, 3.75rem);
  font-weight: var(--weight-bold);
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--color-fg);
  margin-bottom: 1.25rem;
}

.hero-title span {
  color: var(--color-brand);
  position: relative;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: 2rem;
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  font-weight: var(--weight-medium);
}

.trust-item svg { color: var(--color-success); flex-shrink: 0; }

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-card-live {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .65rem;
  font-weight: 700;
  color: #16a34a;
  background: rgba(22,163,74,.1);
  padding: .2rem .625rem;
  border-radius: 999px;
  letter-spacing: .03em;
}

.hero-live-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: livePulse 2s ease-in-out infinite;
}

@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(.75); }
}

/* Hero card product rows */
.hcp-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  margin-bottom: .5rem;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.hcp-row:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(10,37,64,.2);
}

.hcp-brand {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: .55rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .06em;
  box-shadow: 0 2px 6px rgba(0,0,0,.2);
}

.hcp-info { flex: 1; min-width: 0; }

.hcp-model {
  font-size: .75rem;
  font-weight: 700;
  color: var(--color-fg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hcp-specs {
  display: flex;
  gap: .3rem;
  margin-top: .25rem;
  flex-wrap: wrap;
}

.hcp-chip {
  font-size: .6rem;
  font-weight: 600;
  padding: .1rem .4rem;
  border-radius: 4px;
}

.hcp-chip--blue   { background: rgba(37,99,235,.1); color: #2563eb; }
.hcp-chip--purple { background: rgba(124,58,237,.1); color: #7c3aed; }
.hcp-chip--amber  { background: rgba(217,119,6,.1);  color: #d97706; }
.hcp-chip--muted  { background: transparent; color: var(--color-fg-subtle); padding-left: 0; }

.hcp-stok {
  display: flex;
  align-items: center;
  gap: .25rem;
  font-size: .6rem;
  font-weight: 700;
  color: #16a34a;
  background: rgba(22,163,74,.08);
  padding: .25rem .5rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.hcp-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding-top: .875rem;
  border-top: 1px solid var(--color-border);
}

/* ── 9. Section Headers ── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-fg-subtle);
  margin-bottom: 0.75rem;
}

.section-title { margin-bottom: 0.75rem; }
.section-desc { font-size: var(--text-lg); color: var(--color-fg-muted); }

/* ── 10. Category Cards ── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.category-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-brand));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.category-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
}

.category-card:hover::after { opacity: 1; }

.category-icon {
  width: 52px; height: 52px;
  background: rgba(10,37,64,.06);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  transition: background var(--transition-base);
}

.category-card:hover .category-icon { background: rgba(251,191,36,.15); }

.category-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-fg);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.category-sub {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.875rem;
}

.category-desc {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
  flex: 1;
  margin-bottom: 1.5rem;
}

.category-tags {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.category-tag {
  font-size: var(--text-xs);
  padding: 0.2rem 0.5rem;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-fg-muted);
  font-weight: var(--weight-medium);
}

.category-link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-brand);
  margin-top: auto;
  transition: gap var(--transition-fast);
}

.category-card:hover .category-link { gap: 0.625rem; }

/* ── 11. Why Us ── */
.why-us { background: var(--color-bg-subtle); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-item {
  padding: 1.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: box-shadow var(--transition-base);
}

.feature-item:hover { box-shadow: var(--shadow-md); }

.feature-icon {
  width: 48px; height: 48px;
  background: var(--color-brand);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
  color: #fff;
  flex-shrink: 0;
}

.feature-title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-fg);
  margin-bottom: 0.375rem;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
}

/* ── 12. Brand Logos ── */
.brands { border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); padding: 3rem 0; }

.brands-label {
  text-align: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-fg-subtle);
  margin-bottom: 2rem;
}

.brands-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.4;
  filter: grayscale(1);
  transition: all var(--transition-base);
  text-decoration: none;
  padding: 0.5rem;
}

.brand-logo:hover {
  opacity: 0.9;
  filter: grayscale(0);
}

.brand-logo-text {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  color: var(--color-fg);
}

/* ── 13. Lead Form Section ── */
.lead-form-section {
  background: var(--color-brand);
  color: #fff;
}

.lead-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.lead-form-copy h2 {
  color: #fff;
  margin-bottom: 1rem;
}

.lead-form-copy p {
  color: rgba(255,255,255,.7);
  font-size: var(--text-lg);
  margin-bottom: 1.5rem;
}

.lead-form-copy ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.lead-form-copy li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: rgba(255,255,255,.8);
}

/* ── 14. Forms ── */
.form-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
}

.form-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-fg);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.form-subtitle {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  margin-bottom: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.375rem; }
.form-group.full { grid-column: 1 / -1; }

.form-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-fg);
  letter-spacing: 0.01em;
}

.form-label .required { color: var(--color-error); margin-left: 2px; }

.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-fg);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(10,37,64,.1);
}

.form-input::placeholder { color: var(--color-fg-subtle); }

textarea.form-input {
  resize: vertical;
  min-height: 90px;
  line-height: var(--leading-relaxed);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 16px; height: 16px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 1px;
  cursor: pointer;
  accent-color: var(--color-brand);
}

.form-checkbox-text {
  font-size: var(--text-xs);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
}

.form-checkbox-text a {
  color: var(--color-brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-submit { width: 100%; justify-content: center; margin-top: 0.5rem; }

.form-error-msg {
  display: none;
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: 0.25rem;
}

.form-input.error { border-color: var(--color-error); }
.form-input.error + .form-error-msg { display: block; }

.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}

.form-success .success-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.form-success h3 {
  font-size: var(--text-2xl);
  color: var(--color-fg);
  margin-bottom: 0.5rem;
}

.form-success p {
  color: var(--color-fg-muted);
}

.form-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1rem 0;
  color: var(--color-fg-subtle);
  font-size: var(--text-xs);
}

.form-divider::before,
.form-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.form-quick-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

/* ── 15. Sticky Sidebar Form ── */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 3rem;
  align-items: start;
}

.sidebar-form-wrapper {
  position: sticky;
  top: 88px;
}

.sidebar-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
}

/* ── 16. Blog Cards ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.blog-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  text-decoration: none;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.blog-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.blog-card-category {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-brand);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-card-date {
  font-size: var(--text-xs);
  color: var(--color-fg-subtle);
}

.blog-card-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-fg);
  line-height: var(--leading-snug);
  margin-bottom: 0.625rem;
  letter-spacing: -0.02em;
  flex: 1;
}

.blog-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  line-height: var(--leading-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}

.blog-card-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-brand);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap var(--transition-fast);
}

.blog-card:hover .blog-card-link { gap: 0.5rem; }

/* ── 17. WhatsApp Floating Button ── */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  width: 60px; height: 60px;
  background: var(--color-whatsapp);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,.4);
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  animation: wa-pulse 3s ease-in-out infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37,211,102,.55);
  animation: none;
}

.whatsapp-float svg { width: 28px; height: 28px; }

.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + 0.75rem);
  background: var(--color-fg);
  color: var(--color-bg);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-full);
  opacity: 0;
  transform: translateX(6px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.whatsapp-float:hover .whatsapp-tooltip {
  opacity: 1;
  transform: translateX(0);
}

@keyframes wa-pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(37,211,102,.4); }
  50% { box-shadow: 0 4px 30px rgba(37,211,102,.7); }
}

/* ── 18. Mobile Sticky Bar ── */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  z-index: 998;
  box-shadow: 0 -4px 20px rgba(0,0,0,.08);
}

.mobile-sticky-bar-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  max-width: 400px;
  margin: 0 auto;
}

.mobile-sticky-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-md);
  font-size: 0.65rem;
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1.5px solid transparent;
}

.mobile-sticky-btn.phone {
  color: var(--color-brand);
  border-color: var(--color-brand);
  background: rgba(10,37,64,.05);
}

.mobile-sticky-btn.whatsapp {
  color: #fff;
  background: var(--color-whatsapp);
}

.mobile-sticky-btn.quote {
  color: #fff;
  background: var(--color-brand);
}

.mobile-sticky-btn svg { width: 20px; height: 20px; }

/* ── 19. Footer ── */
.site-footer {
  background: var(--color-fg);
  color: rgba(255,255,255,.65);
  padding: 4rem 0 2rem;
}

@media (prefers-color-scheme: dark) {
  .site-footer { background: var(--color-bg-muted); }
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 2rem;
}

.footer-brand-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin: 1rem 0 1.5rem;
  max-width: 28ch;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 36px; height: 36px;
  background: rgba(255,255,255,.08);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.6);
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
}

.footer-social a:hover {
  background: rgba(255,255,255,.15);
  color: #fff;
}

.footer-col-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.6);
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: #fff; }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: var(--text-sm);
  color: rgba(255,255,255,.6);
  margin-bottom: 0.75rem;
}

.footer-contact-item svg { flex-shrink: 0; margin-top: 1px; width: 14px; height: 14px; }

.footer-contact-item a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: rgba(255,255,255,.35);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-bottom a {
  color: rgba(255,255,255,.4);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover { color: rgba(255,255,255,.7); }

.footer-logo-text {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: #fff;
  letter-spacing: -0.04em;
}

/* ── 20. Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  color: var(--color-fg-subtle);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-fg-subtle);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover { color: var(--color-brand); }

.breadcrumb-sep { color: var(--color-border-strong); }

/* ── 21. Page Hero (inner pages) ── */
.page-hero {
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border);
}

.page-hero-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.page-hero-title {
  font-size: clamp(2rem, 4vw, var(--text-5xl));
  font-weight: var(--weight-bold);
  letter-spacing: -0.03em;
  margin-bottom: 0.875rem;
}

.page-hero-desc {
  font-size: var(--text-lg);
  color: var(--color-fg-muted);
  max-width: 60ch;
}

/* ── 22. Stats ── */
.stats-row {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat-item {}

.stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  letter-spacing: -0.04em;
  color: var(--color-fg);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  margin-top: 0.25rem;
}

/* ── 23. CTA Box (blog içi) ── */
.cta-box {
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 2rem 0;
}

.cta-box-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-fg);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.cta-box-desc {
  font-size: var(--text-sm);
  color: var(--color-fg-muted);
  margin-bottom: 1rem;
}

.cta-box-btns {
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
}

/* ── 23b. TOC (Table of Contents) ── */
.toc {
  background: #fff;
  border: 1.5px solid var(--color-border-strong);
  border-left: 4px solid var(--color-brand);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.toc strong {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #0a0a0a;
  display: block;
  margin-bottom: .75rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .375rem;
  list-style: decimal;
}

.toc li { color: #1e3a5f; font-size: var(--text-sm); }

.toc a {
  font-size: var(--text-sm);
  color: #1e3a5f;
  text-decoration: none;
  font-weight: 500;
}

.toc a:hover { color: var(--color-brand); text-decoration: underline; }

/* ── 24. Spec Table ── */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.spec-table tr {
  border-bottom: 1px solid var(--color-border);
}

.spec-table tr:last-child { border-bottom: none; }

.spec-table td {
  padding: 0.75rem 1rem;
  line-height: var(--leading-normal);
}

.spec-table td:first-child {
  font-weight: var(--weight-semibold);
  color: var(--color-fg);
  width: 45%;
  background: var(--color-bg-subtle);
}

.spec-table td:last-child { color: var(--color-fg-muted); }

/* ── 25. Alert Banner ── */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  border: 1px solid;
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
}

.alert-info {
  background: rgba(10,37,64,.05);
  border-color: rgba(10,37,64,.15);
  color: var(--color-brand);
}

.alert-success {
  background: rgba(22,163,74,.05);
  border-color: rgba(22,163,74,.2);
  color: var(--color-success);
}

/* ── 26. Skeleton Loading ── */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-muted) 25%, var(--color-border) 50%, var(--color-bg-muted) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── 27. Mobile Nav Overlay ── */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  flex-direction: column;
  padding: 1.5rem;
}

.mobile-nav.open { display: flex; }

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
}

.mobile-nav-links a {
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-fg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-footer {
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── 28. Skip Link ── */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-brand);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus { top: 1rem; }

/* ── 29. Utilities ── */
.text-center { text-align: center; }
.text-muted { color: var(--color-fg-muted); }
.text-accent { color: var(--color-accent); }
.text-brand { color: var(--color-brand); }
.fw-semibold { font-weight: var(--weight-semibold); }
.fw-bold { font-weight: var(--weight-bold); }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ── 30. Responsive ── */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --content-width: 100%; }

  .header-nav,
  .header-phone,
  .header-wa { display: none; }

  .mobile-menu-btn { display: flex; }

  .hero { padding: 4rem 0 3rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { display: none; }
  .hero-title { font-size: clamp(2rem, 8vw, 2.75rem); }

  .categories-grid { grid-template-columns: 1fr; gap: 1rem; }

  .features-grid { grid-template-columns: 1fr 1fr; }

  .lead-form-grid { grid-template-columns: 1fr; gap: 2rem; }

  .blog-grid { grid-template-columns: 1fr; }

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

  .product-layout { grid-template-columns: 1fr; }
  .sidebar-form-wrapper { position: static; }

  .brands-grid { gap: 1.5rem; }

  .form-grid { grid-template-columns: 1fr; }

  .whatsapp-float { width: 52px; height: 52px; bottom: 5.5rem; right: 1rem; }

  .mobile-sticky-bar { display: block; }

  .section { padding: 3rem 0; }
  .section-lg { padding: 4rem 0; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .stats-row { gap: 2rem; }
  .stat-value { font-size: var(--text-3xl); }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn-lg { text-align: center; justify-content: center; }
  .features-grid { grid-template-columns: 1fr; }
  .form-quick-btns { grid-template-columns: 1fr; }
}

/* ── 31. Print ── */
@media print {
  .site-header,
  .whatsapp-float,
  .mobile-sticky-bar,
  .site-footer { display: none; }

  body { color: #000; background: #fff; }
  a::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #666; }
}