/* ===== DOĞU PATENT - SHARED STYLES ===== */
:root {
  --primary: #002441;
  --primary-container: #0f3a5f;
  --on-primary: #ffffff;
  --on-primary-container: #80a4cf;
  --secondary: #5d5e5f;
  --surface: #fcf9f8;
  --surface-container: #f0eded;
  --surface-container-low: #f6f3f2;
  --surface-container-high: #eae7e7;
  --surface-container-highest: #e5e2e1;
  --surface-container-lowest: #ffffff;
  --on-surface: #1b1c1c;
  --on-surface-variant: #42474e;
  --outline: #73777f;
  --outline-variant: #c3c7cf;
  --error: #ba1a1a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--surface);
  color: var(--on-surface);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--primary-container);
  color: var(--on-primary);
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Navigation */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(252, 249, 248, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(195,199,207,0.1);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.3s;
  padding-bottom: 2px;
}

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

.nav-links a.active {
  border-bottom: 2px solid var(--primary);
  font-weight: 600;
}

.nav-cta {
  background: var(--primary);
  color: #ffffff !important;
  padding: 0.75rem 1.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding-bottom: 0.75rem !important;
  border-bottom: none !important;
}

.nav-cta:hover { opacity: 0.9; }

/* Mobile Menu */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--surface);
  padding: 2rem;
  flex-direction: column;
  gap: 1.5rem;
  border-bottom: 1px solid var(--outline-variant);
  z-index: 49;
}

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

.nav-mobile a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--secondary);
  text-decoration: none;
}

.nav-mobile a.active { color: var(--primary); font-weight: 700; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
}

/* Footer */
.footer-main {
  background: var(--primary);
  color: white;
  border-top: 1px solid var(--primary-container);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  padding: 5rem 3rem;
  max-width: 1280px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand {
  font-size: 1.125rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.footer-text {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 1.5rem;
}

.footer-link {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  margin-bottom: 0.75rem;
  transition: color 0.3s;
}

.footer-link:hover { color: white; }

.footer-bottom {
  padding: 2rem 3rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-bottom p {
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
}

.footer-social {
  display: flex;
  gap: 1.5rem;
}

.footer-social a {
  color: rgba(255,255,255,0.3);
  text-decoration: none;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: color 0.3s;
}

.footer-social a:hover { color: white; }

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--primary);
  color: white;
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  z-index: 9999;
  transform: translateY(150%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 400px;
}

.toast.show { transform: translateY(0); }
.toast.error { background: var(--error); }

/* WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
  transition: transform 0.3s;
  text-decoration: none;
}

.whatsapp-float:hover { transform: scale(1.1); }

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

/* Utility */
.container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }