/* =========================================
   Base
========================================= */
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 600;
}

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section {
  padding-block: var(--space-7);
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: radial-gradient(circle at 20% 0%, rgba(189, 36, 34, 0.18), transparent 45%), var(--color-black);
  color: #ffffff;
  --color-text: #ffffff;
  --color-text-muted: #b3b3b3;
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-strong: rgba(255, 255, 255, 0.1);
  --color-border: rgba(255, 255, 255, 0.14);
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-red);
  margin-bottom: var(--space-2);
}

.section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--space-2);
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  z-index: 200;
  background: var(--color-accent-red);
  color: #fff;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--space-2);
}

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent-red);
  outline-offset: 2px;
}

/* =========================================
   Glass card + buttons
========================================= */
.glass-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(189, 36, 34, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(189, 36, 34, 0.45);
}

.btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-strong);
  transform: translateY(-2px);
}

/* =========================================
   Header
========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom-color: var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
}

.brand img {
  height: 34px;
  width: auto;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.primary-nav .nav-links {
  display: flex;
  gap: var(--space-3);
}

.primary-nav .nav-links a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.primary-nav .nav-links a:hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-1);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =========================================
   Hero
========================================= */
.hero {
  padding-block: var(--space-8) var(--space-7);
  text-align: center;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-width: 800px;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  margin-bottom: var(--space-3);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  max-width: 620px;
  margin-inline: auto;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.hero-note {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* =========================================
   Şeffaflık
========================================= */
.transparency-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-5);
  align-items: center;
}

.transparency-text p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-block: var(--space-3);
}

.transparency-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.transparency-card:hover {
  transform: translateY(-4px);
  border-color: rgba(189, 36, 34, 0.3);
  box-shadow: var(--shadow-strong);
}

.transparency-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-1);
}

.transparency-icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
}

.transparency-card h3 {
  font-size: 1.05rem;
}

.transparency-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.transparency-arrow {
  margin-top: var(--space-1);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-accent-red);
}

/* =========================================
   Modelimiz — karşılaştırma tablosu
========================================= */
.compare-table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
}

.compare-table th,
.compare-table td {
  padding: var(--space-3);
  text-align: left;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.compare-table thead th {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
}

.compare-table thead th:first-child {
  color: var(--color-text-muted);
}

.compare-table tbody td:first-child {
  color: var(--color-text-muted);
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-highlight {
  background: rgba(189, 36, 34, 0.06);
  border-left: 3px solid var(--color-accent-red);
  font-weight: 600;
}

.compare-table thead th.compare-highlight {
  color: var(--color-accent-red);
}

/* =========================================
   Modelimiz — süreç (ikincil blok)
========================================= */
.process-secondary {
  margin-top: var(--space-5);
}

.process-secondary > .eyebrow {
  display: block;
  margin-bottom: var(--space-2);
}

.process-secondary .process-steps {
  gap: var(--space-2);
}

.process-secondary .process-step {
  padding: var(--space-3) var(--space-2);
}

.process-secondary .step-number {
  width: 32px;
  height: 32px;
  font-size: 0.85rem;
  margin-bottom: var(--space-1);
}

.process-secondary .process-step h3 {
  font-size: 1rem;
}

.process-secondary .process-step p {
  font-size: 0.85rem;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  counter-reset: step;
}

.process-step {
  padding: var(--space-4) var(--space-3);
  position: relative;
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.process-step h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-1);
}

.process-step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* =========================================
   Girişimlerimiz — sekmeli vitrin
========================================= */
.project-tabs-wrap {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-3);
  align-items: start;
}

.project-tablist {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.project-tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-align: left;
  transition: background var(--transition), border-color var(--transition);
}

.project-tab img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.project-tab span {
  display: flex;
  flex-direction: column;
  gap: 0.15em;
}

.project-tab strong {
  font-size: 0.95rem;
  color: var(--color-text);
}

.project-tab small {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.project-tab:hover {
  border-color: var(--color-border);
}

.project-tab.is-active {
  background: var(--color-surface);
  border-color: rgba(189, 36, 34, 0.3);
  box-shadow: var(--shadow-soft);
}

.project-tab.is-active strong {
  color: var(--color-accent-red);
}

.project-panel {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.project-panel h3 {
  font-size: 1.25rem;
}

.project-panel .project-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.project-panel .feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-block: var(--space-1);
}

.project-panel .feature-list li {
  font-size: 0.9rem;
  padding-left: 1.3em;
  position: relative;
  color: var(--color-text);
}

.project-panel .feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-primary);
}

.project-cta {
  display: flex;
  flex-direction: column;
  gap: 0.35em;
}

.project-cta a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-accent-red);
}

.project-cta a:hover {
  text-decoration: underline;
}

.project-cta-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: auto;
  padding-top: var(--space-2);
}

.tags li {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3em 0.75em;
  border-radius: var(--radius-pill);
  background: rgba(189, 36, 34, 0.08);
  color: var(--color-accent-red);
  border: 1px solid rgba(189, 36, 34, 0.2);
}

/* =========================================
   Gelecek Vizyonu
========================================= */
.vision-content {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-5);
  align-items: center;
}

.vision-text p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-3);
}

.vision-chips {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.vision-chip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
}

.vision-chip .chip-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.vision-chip .chip-icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
}

.vision-chip h3 {
  font-size: 1rem;
}

.vision-chip p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* =========================================
   Teknoloji Altyapımız
========================================= */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3);
}

.tech-card {
  padding: var(--space-4) var(--space-3);
  text-align: center;
}

.tech-card .tech-icon {
  width: 52px;
  height: 52px;
  margin-inline: auto;
  margin-bottom: var(--space-2);
  border-radius: var(--radius-md);
  background: var(--color-surface-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-card .tech-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--color-accent-red);
}

.tech-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-1);
}

.tech-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* =========================================
   İletişim
========================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-5);
  align-items: start;
}

.contact-info p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.contact-audiences {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.contact-audiences li {
  font-size: 0.95rem;
  padding-left: 1.3em;
  position: relative;
  color: var(--color-text);
}

.contact-audiences li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-primary);
}

.contact-form {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.segment-picker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.segment-btn {
  flex: 1 1 auto;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  text-align: center;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.segment-btn:hover {
  border-color: rgba(189, 36, 34, 0.35);
}

.segment-btn.is-active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
}

.segment-heading {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  min-height: 1.2em;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-row input,
.form-row select,
.form-row textarea {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--color-text);
  transition: border-color var(--transition), background var(--transition);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--color-accent-red);
  background: var(--color-surface);
  outline: none;
}

.form-row textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-accent-red);
  min-height: 1em;
}

.form-status {
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  display: none;
}

.form-status.is-success {
  display: block;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
}

/* =========================================
   Footer
========================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.footer-logo {
  height: 44px;
  width: auto;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 320px;
  margin-top: var(--space-2);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.9rem;
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-text);
}

.social-links {
  display: flex;
  gap: var(--space-2);
}

.social-links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

.social-links a:hover {
  background: rgba(189, 36, 34, 0.1);
  border-color: rgba(189, 36, 34, 0.3);
  transform: translateY(-2px);
}

.social-links a:hover svg {
  stroke: var(--color-accent-red);
}

.social-links svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-text);
}

.footer-bottom {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* =========================================
   Scroll reveal
========================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* =========================================
   Responsive
========================================= */
@media (max-width: 860px) {
  .vision-content,
  .contact-layout,
  .transparency-layout {
    grid-template-columns: 1fr;
  }

  .project-tabs-wrap {
    grid-template-columns: 1fr;
  }

  .project-tablist {
    flex-direction: row;
    overflow-x: auto;
    gap: var(--space-2);
    padding-bottom: var(--space-1);
  }

  .project-tab {
    flex: 0 0 auto;
  }

  .project-tab span {
    display: none;
  }

  .project-tab.is-active {
    background: var(--gradient-primary);
    border-color: transparent;
  }

  .project-tab.is-active span {
    display: flex;
  }

  .project-tab.is-active strong {
    color: #fff;
  }

  .project-tab.is-active small {
    color: rgba(255, 255, 255, 0.85);
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: var(--blur-glass);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4) var(--space-3);
    gap: var(--space-4);
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .primary-nav.is-open {
    transform: translateX(0);
  }

  .primary-nav .nav-links {
    flex-direction: column;
    gap: var(--space-3);
  }

  .primary-nav .nav-links a {
    font-size: 1.1rem;
  }

  .section {
    padding-block: var(--space-6);
  }
}