/* ==========================================================================
   SurConnect — Kurumsal Telekomünikasyon ERP, Saha & İletişim Platformu
   Tasarım Sistemi: Fluent 2 / Kurumsal Teknik Grid (Standalone Web)
   ========================================================================== */

:root {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-navy: #0b192e;
  --bg-navy-mid: #132a4a;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;
  --brand-primary: #153a6b;
  --brand-accent: #0284c7;
  --brand-accent-hover: #0369a1;
  --brand-amber: #d97706;
  --status-ok: #15803d;
  --status-ok-bg: #dcfce7;
  --status-warn: #b45309;
  --status-warn-bg: #fef3c7;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 28px rgba(15, 23, 42, 0.09);
  --container: 1220px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Top Utility Bar ── */
.topbar {
  background: var(--bg-navy);
  color: #cbd5e1;
  font-size: 12.5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
}

.topbar__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  display: inline-block;
}

.topbar__links {
  display: flex;
  gap: 18px;
}

.topbar__links a {
  color: #cbd5e1;
}

.topbar__links a:hover {
  color: #ffffff;
}

/* ── Header / Navbar ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 18.5px;
  letter-spacing: -0.3px;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

.brand span small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
  margin-top: -2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13.8px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  color: var(--text-primary);
  cursor: pointer;
}

/* ── Buttons (Fluent 2: 6px radius) ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--brand-primary);
  color: #ffffff;
}

.btn--primary:hover {
  background: #0f294d;
  color: #ffffff;
}

.btn--outline {
  background: #ffffff;
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn--outline:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn--lg {
  height: 44px;
  padding: 0 22px;
  font-size: 14px;
}

/* ── Hero Section ── */
.hero {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 52px 0 60px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 36px;
  line-height: 1.18;
  letter-spacing: -0.6px;
  margin: 0 0 16px;
  color: var(--text-primary);
}

.hero p.lead {
  font-size: 15.5px;
  color: var(--text-secondary);
  margin: 0 0 24px;
  max-width: 580px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.hero__meta-item strong {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
}

.hero__meta-item span {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Interactive App Preview Panel (Hero Right) ── */
.preview-frame {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.preview-frame__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-navy);
  color: #ffffff;
  font-size: 12.5px;
}

.preview-tabs {
  display: flex;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
  padding: 4px;
  gap: 4px;
}

.preview-tab {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 7px 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.preview-tab.is-active {
  background: #ffffff;
  color: var(--brand-primary);
  box-shadow: var(--shadow-xs);
}

.preview-pane {
  display: none;
  padding: 16px;
}

.preview-pane.is-active {
  display: block;
}

/* Mockup Cards inside Preview (Fluent 2: 8px card, 4px badge) */
.wo-mock {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  background: #ffffff;
  margin-bottom: 10px;
}

.wo-mock:last-child {
  margin-bottom: 0;
}

.wo-mock__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.wo-mock__title {
  font-weight: 700;
  font-size: 13.8px;
  color: var(--text-primary);
}

.wo-mock__badges {
  display: flex;
  gap: 5px;
}

.f-badge {
  display: inline-block;
  padding: 2px 7px;
  font-size: 10.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.f-badge--warn {
  background: #fef3c7;
  color: #b45309;
  border-color: #fde68a;
}

.f-badge--crit {
  background: #fee2e2;
  color: #b91c1c;
  border-color: #fecaca;
}

.f-badge--ok {
  background: #dcfce7;
  color: #15803d;
  border-color: #bbf7d0;
}

.f-badge--info {
  background: #e0f2fe;
  color: #0369a1;
  border-color: #bae6fd;
}

.wo-mock__loc {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 6px;
}

.wo-mock__addr {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 9px;
}

.wo-mock__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-page);
  padding: 7px 10px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 600;
}

.wo-mock__call {
  background: var(--brand-primary);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11.5px;
}

/* ── Section Layout ── */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-color);
}

.section--white {
  background: var(--bg-surface);
}

.section--navy {
  background: var(--bg-navy);
  color: #ffffff;
}

.section--navy .section__head h2 {
  color: #ffffff;
}

.section--navy .section__head p {
  color: #cbd5e1;
}

.section__head {
  max-width: 740px;
  margin-bottom: 36px;
}

.section__head h2 {
  font-size: 26px;
  margin: 0 0 10px;
  letter-spacing: -0.4px;
}

.section__head p {
  margin: 0;
  color: var(--text-secondary);
}

/* ── Suite Filter Tabs (ERP / Mobil / Çağrı Merkezi / NOC) ── */
.suite-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  padding: 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.suite-btn {
  flex: 1 1 auto;
  min-width: 150px;
  padding: 10px 16px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s ease;
}

.suite-btn:hover {
  color: var(--text-primary);
}

.suite-btn.is-active {
  background: #ffffff;
  color: var(--brand-primary);
  box-shadow: var(--shadow-xs);
}

.suite-panel {
  display: none;
}

.suite-panel.is-active {
  display: block;
}

/* ── Feature Grid ── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
}

.feature-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-size: 12.5px;
  color: var(--text-muted);
}

.feature-card__code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--brand-accent);
  background: #f0f9ff;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid #bae6fd;
}

.feature-card h3 {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 13.6px;
  color: var(--text-secondary);
  margin: 0 0 12px;
}

.feature-card ul {
  margin: auto 0 0;
  padding-left: 16px;
  font-size: 12.8px;
  color: var(--text-secondary);
}

.feature-card li + li {
  margin-top: 4px;
}

/* ── Integration Ecosystem Cards ── */
.integ-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.integ-card span.tag {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.integ-card h4 {
  margin: 0 0 6px;
  font-size: 15px;
  color: #ffffff;
}

.integ-card p {
  margin: 0;
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.5;
}

/* ── Platform Download Cards ── */
.platform-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.platform-card__meta {
  font-size: 11.5px;
  color: var(--brand-accent);
  margin-bottom: 6px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.platform-card h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
}

.platform-card p {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin: 0 0 16px;
}

.platform-card ul {
  margin: 0 0 20px;
  padding-left: 16px;
  font-size: 12.8px;
  color: var(--text-secondary);
}

.platform-card li + li {
  margin-top: 4px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.spec-table th {
  background: var(--bg-subtle);
  font-weight: 600;
  color: var(--text-primary);
  width: 28%;
}

.spec-table code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--brand-primary);
}

/* ── Legal & Subpage Layout ── */
.page-hero {
  background: var(--bg-navy);
  color: #ffffff;
  padding: 44px 0;
  border-bottom: 1px solid var(--border-color);
}

.page-hero h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.page-hero p {
  margin: 0;
  color: #cbd5e1;
  font-size: 14.5px;
}

.doc-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 36px;
  padding: 44px 0 64px;
  align-items: start;
}

.doc-nav {
  position: sticky;
  top: 90px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px;
}

.doc-nav h4 {
  margin: 0 0 10px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.doc-nav a {
  display: block;
  padding: 7px 10px;
  font-size: 13.5px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

.doc-nav a:hover,
.doc-nav a.active {
  background: var(--bg-subtle);
  color: var(--brand-primary);
  font-weight: 600;
}

.doc-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
}

.doc-content h2 {
  font-size: 19px;
  color: var(--brand-primary);
  margin: 28px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

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

.doc-content p,
.doc-content li {
  color: var(--text-secondary);
  font-size: 14.5px;
}

/* ── FAQ Accordion ── */
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  margin-bottom: 10px;
}

.faq-btn {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 14px 16px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-body {
  display: none;
  padding: 0 16px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.faq-item.is-open .faq-body {
  display: block;
}

/* ── Form ── */
.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  font-size: 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--text-primary);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.14);
}

/* ── Footer ── */
.site-footer {
  background: var(--bg-navy);
  color: #94a3b8;
  padding: 48px 0 32px;
  font-size: 13.5px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer h4 {
  color: #ffffff;
  font-size: 13.5px;
  margin: 0 0 12px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li + li {
  margin-top: 8px;
}

.footer-links a {
  color: #94a3b8;
}

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

.footer__bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12.5px;
}

@media (max-width: 960px) {
  .hero__grid,
  .grid-3,
  .grid-4,
  .grid-2,
  .doc-layout,
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .hero__meta {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 14px;
    align-items: flex-start;
  }
  .nav-links.is-open {
    display: flex;
  }
  .nav-toggle {
    display: inline-block;
  }
}