/* ==========================================================================
   dondurmamakinesi.com - Modern B2B Endüstriyel Tasarım Sistemi
   Lightweight, Zero-dependency, Core Web Vitals Optimized (<12KB)
   ========================================================================== */

:root {
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-dark: #075985;
  --primary-light: #f0f9ff;
  --primary-border: #bae6fd;
  
  --navy-950: #090d16;
  --navy-900: #0f172a;
  --navy-800: #1e293b;
  --navy-700: #334155;
  
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  --whatsapp: #25d366;
  --whatsapp-dark: #128c7e;
  --whatsapp-hover: #1eb956;
  
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #ffffff;
  
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  
  --border-radius-sm: 6px;
  --border-radius: 10px;
  --border-radius-lg: 16px;
  --border-radius-pill: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
  
  --container-max: 1200px;
  --header-height: 76px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --transition: all 0.2s ease-in-out;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: #ffffff;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  padding-bottom: 60px;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

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

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

a:hover {
  color: var(--primary-hover);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--navy-900);
  line-height: 1.25;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

h1 { font-size: 2.25rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; letter-spacing: -0.015em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1rem;
  color: var(--gray-700);
}

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.35rem;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section {
  padding: 4rem 0;
}

.section-sm {
  padding: 2.5rem 0;
}

.section-bg {
  background-color: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.section-dark {
  background-color: var(--navy-900);
  color: #ffffff;
}

.section-dark h2, .section-dark h3, .section-dark p {
  color: #ffffff;
}

.section-dark .text-muted {
  color: var(--gray-400);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }
.fw-bold { font-weight: 700; }
.fw-semibold { font-weight: 600; }

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.flex-wrap { flex-wrap: wrap; }

/* Top Notice Bar */
.top-bar {
  background-color: var(--navy-950);
  color: var(--gray-300);
  font-size: 0.85rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar a {
  color: var(--gray-200);
}
.top-bar a:hover {
  color: #ffffff;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow 0.2s;
}

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

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--navy-900);
  text-decoration: none;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.05em;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--navy-900);
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  font-weight: 600;
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  color: var(--gray-700);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  border-radius: 2px;
}

.nav-cta-group {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background-color: var(--navy-900);
  transition: var(--transition);
}

/* Mobile Nav Drawer */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  z-index: 1001;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.mobile-nav-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 82%;
  max-width: 340px;
  background: #ffffff;
  z-index: 1002;
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.mobile-drawer.active {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.mobile-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-600);
}

.mobile-menu-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-menu-link {
  display: block;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--navy-900);
  border-radius: var(--border-radius-sm);
}

.mobile-menu-link:hover, .mobile-menu-link.active {
  background: var(--primary-light);
  color: var(--primary);
}

@media (min-width: 992px) {
  .nav-menu { display: flex; }
  .nav-cta-group { display: flex; }
  .nav-toggle { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--border-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.9rem 1.75rem;
  font-size: 1.05rem;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.3);
}

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

.btn-secondary {
  background-color: var(--gray-100);
  color: var(--navy-900);
  border-color: var(--gray-200);
}

.btn-secondary:hover {
  background-color: var(--gray-200);
  color: var(--navy-900);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-whatsapp {
  background-color: var(--whatsapp);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  background-color: var(--whatsapp-hover);
  color: #ffffff;
}

.btn-dark {
  background-color: var(--navy-900);
  color: #ffffff;
}

.btn-dark:hover {
  background-color: var(--navy-950);
  color: #ffffff;
}

/* Hero Section */
.hero {
  padding: 4.5rem 0 3.5rem;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--primary-light);
  color: var(--primary-hover);
  border: 1px solid var(--primary-border);
  border-radius: var(--border-radius-pill);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--navy-900);
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--gray-600);
  line-height: 1.6;
  max-width: 650px;
  margin-bottom: 2rem;
}

/* Product Cards */
.card {
  background-color: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.card-img-wrapper {
  background-color: #f8fafc;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--gray-200);
  position: relative;
  min-height: 240px;
}

.card-img {
  max-height: 200px;
  width: auto;
  object-fit: contain;
  transition: transform 0.3s;
}

.card:hover .card-img {
  transform: scale(1.04);
}

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

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card-title a {
  color: var(--navy-900);
}

.card-title a:hover {
  color: var(--primary);
}

.card-specs {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--gray-600);
  border-top: 1px dashed var(--gray-200);
  border-bottom: 1px dashed var(--gray-200);
  padding: 0.75rem 0;
}

.card-specs li {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.card-specs li strong {
  color: var(--navy-900);
}

.card-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Feature Boxes */
.feature-box {
  background-color: #ffffff;
  padding: 1.75rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-box:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-border);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  background: #ffffff;
}

.table th, .table td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  background-color: var(--gray-100);
  color: var(--navy-900);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

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

.table tbody tr:nth-child(even) {
  background-color: var(--gray-50);
}

/* Breadcrumbs */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--gray-500);
  list-style: none;
  padding: 1rem 0;
  margin: 0;
}

.breadcrumb li+li::before {
  content: "›";
  margin-right: 0.5rem;
  color: var(--gray-400);
}

.breadcrumb a {
  color: var(--gray-600);
}

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

.breadcrumb .active {
  color: var(--navy-900);
  font-weight: 600;
}

/* FAQ Accordion */
.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  background: #ffffff;
  margin-bottom: 0.75rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.15rem 1.5rem;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy-900);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--gray-400);
  transition: transform 0.25s;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 1.5rem;
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  padding-bottom: 1.25rem;
}

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

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy-900);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  background-color: #ffffff;
  color: var(--navy-900);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

textarea.form-control {
  min-height: 110px;
  resize: vertical;
}

/* Antispam honeypot hidden */
.hp-check {
  display: none !important;
  visibility: hidden !important;
}

/* Footer */
.footer {
  background-color: var(--navy-950);
  color: var(--gray-400);
  font-size: 0.92rem;
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

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

.footer li {
  margin-bottom: 0.6rem;
}

.footer a {
  color: var(--gray-400);
}

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

.footer-bottom {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Mobile Sticky Contact Bar */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: #ffffff;
  border-top: 1px solid var(--gray-200);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  z-index: 999;
}

.mobile-sticky-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  height: 100%;
}

.mobile-sticky-item.call {
  background-color: #ffffff;
  color: var(--navy-900);
  border-right: 1px solid var(--gray-200);
}

.mobile-sticky-item.whatsapp {
  background-color: var(--whatsapp);
  color: #ffffff;
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

/* Responsive adjustments */
@media (max-width: 767px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.45rem; }
  .hero-title { font-size: 2rem; }
  .hero { padding: 2.5rem 0; }
  .section { padding: 2.5rem 0; }
}