/* ===================================
   VOLTIS INTEGRATED SYSTEMS
   Design System: Kinetic Precision
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700&display=swap');

/* ===================================
   CSS CUSTOM PROPERTIES
   =================================== */
:root {
  /* Colors */
  --color-surface: #fcf9f8;
  --color-surface-dim: #dcd9d9;
  --color-surface-bright: #fcf9f8;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f6f3f2;
  --color-surface-container: #f0eded;
  --color-surface-container-high: #eae7e7;
  --color-surface-container-highest: #e5e2e1;
  --color-on-surface: #1c1b1b;
  --color-on-surface-variant: #4e453b;
  --color-inverse-surface: #313030;
  --color-inverse-on-surface: #f3f0ef;
  --color-outline: #807569;
  --color-outline-variant: #d1c5b6;
  --color-primary: #755a2e;
  --color-on-primary: #ffffff;
  --color-primary-container: #c5a371;
  --color-on-primary-container: #513911;
  --color-inverse-primary: #e5c18c;
  --color-secondary: #5f5e5e;
  --color-on-secondary: #ffffff;
  --color-secondary-container: #e4e2e1;
  --color-on-secondary-container: #656464;
  --color-tertiary: #5e5e5e;
  --color-on-tertiary: #ffffff;
  --color-tertiary-container: #a8a8a8;
  --color-on-tertiary-container: #3c3d3d;
  --color-background: #fcf9f8;
  --color-on-background: #1c1b1b;
  --color-surface-variant: #e5e2e1;

  /* Spacing */
  --spacing-base: 8px;
  --container-max: 1280px;
  --gutter: 24px;
  --margin-desktop: 64px;
  --margin-mobile: 20px;

  /* Border Radius */
  --rounded-sm: 0.125rem;
  --rounded: 0.25rem;
  --rounded-md: 0.375rem;
  --rounded-lg: 0.5rem;
  --rounded-xl: 0.75rem;
  --rounded-full: 9999px;

  /* Typography */
  --font-primary: 'Hanken Grotesk', sans-serif;
  --font-mono: 'Hanken Grotesk', sans-serif;

  /* Transitions */
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;
}

/* ===================================
   RESET & BASE
   =================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-on-background);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ===================================
   LAYOUT UTILITIES
   =================================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--margin-desktop);
}

.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--color-surface-container-low);
}

.section-dark {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
}

/* ===================================
   TYPOGRAPHY UTILITIES
   =================================== */
.display-lg {
  font-family: var(--font-primary);
  font-size: 64px;
  font-weight: 700;
  line-height: 72px;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-family: var(--font-primary);
  font-size: 40px;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: -0.01em;
}

.headline-md {
  font-family: var(--font-primary);
  font-size: 32px;
  font-weight: 600;
  line-height: 40px;
}

.body-lg {
  font-family: var(--font-primary);
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
}

.body-md {
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
}

.label-sm {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.05em;
}

/* ===================================
   SECTION HEADER
   =================================== */
.section-header {
  margin-bottom: 64px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background-color: var(--color-primary);
}

.section-title {
  font-size: 40px;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: -0.01em;
  color: var(--color-on-surface);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--color-on-surface-variant);
  max-width: 640px;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: var(--rounded);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
  padding: 14px 28px;
}

.btn-primary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 0 20px rgba(117, 90, 46, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-container);
  padding: 13px 27px;
  border: 1px solid var(--color-primary-container);
}

.btn-secondary:hover {
  background-color: rgba(197, 163, 113, 0.1);
  box-shadow: 0 0 16px rgba(197, 163, 113, 0.2);
}

.btn-hero {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
  padding: 16px 36px;
  font-size: 13px;
}

.btn-hero:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 0 32px rgba(197, 163, 113, 0.3);
  transform: translateY(-2px);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--color-inverse-on-surface);
  padding: 13px 27px;
  border: 1px solid rgba(243, 240, 239, 0.3);
}

.btn-outline-light:hover {
  background-color: rgba(243, 240, 239, 0.1);
  border-color: rgba(243, 240, 239, 0.6);
}

/* ===================================
   HEADER / NAVIGATION
   =================================== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(252, 249, 248, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-outline-variant);
  transition: all var(--transition-base);
  overflow: visible;
}

#header.scrolled {
  background-color: rgba(252, 249, 248, 0.98);
  box-shadow: 0 4px 24px rgba(28, 27, 27, 0.06);
}

#header.scrolled .header-logo {
  background-color: rgba(252, 249, 248, 0.98);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--margin-desktop);
  max-width: var(--container-max);
  margin: 0 auto;
  overflow: visible;
  position: relative;
}

.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1001;
  background-color: rgba(252, 249, 248, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-outline-variant);
  border-top: none;
  padding: 12px 24px;
  border-radius: 0 0 16px 16px;
  box-shadow: 0 12px 32px rgba(28, 27, 27, 0.08);
  align-self: flex-start;
  transition: background-color var(--transition-base);
}

.header-logo img {
  height: 80px;
  width: auto;
  position: relative;
  z-index: 1001;
  filter: drop-shadow(0 4px 12px rgba(117, 90, 46, 0.12));
  transition: height var(--transition-base);
  display: block;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-on-surface-variant);
  padding: 8px 16px;
  border-radius: var(--rounded);
  transition: all var(--transition-base);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 16px;
  right: 16px;
  height: 1px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-link:hover {
  color: var(--color-on-surface);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-on-surface);
  transition: all var(--transition-base);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================================
   HERO / SLIDER
   =================================== */
#hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-video-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(28, 27, 27, 0.78) 0%,
    rgba(49, 48, 48, 0.55) 50%,
    rgba(117, 90, 46, 0.25) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  padding: 0 var(--margin-desktop);
  width: 100%;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-container);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background-color: var(--color-primary-container);
}

.hero-title {
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 24px;
  max-width: 720px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-title span {
  color: var(--color-primary-container);
}

.hero-desc {
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: rgba(243, 240, 239, 0.8);
  max-width: 600px;
  margin-bottom: 48px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(243, 240, 239, 0.5);
}

.scroll-indicator {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(197, 163, 113, 0.8), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ===================================
   PROJECT FLOW SECTION
   =================================== */
#proje-akisi {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
}

#proje-akisi .section-label {
  color: var(--color-inverse-primary);
}

#proje-akisi .section-label::before {
  background-color: var(--color-inverse-primary);
}

#proje-akisi .section-title {
  color: var(--color-inverse-on-surface);
}

#proje-akisi .section-subtitle {
  color: rgba(243, 240, 239, 0.7);
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: rgba(243, 240, 239, 0.1);
  border: 1px solid rgba(243, 240, 239, 0.1);
  border-radius: var(--rounded-lg);
  overflow: hidden;
}

.flow-item {
  background-color: var(--color-inverse-surface);
  padding: 48px 40px;
  position: relative;
  transition: background-color var(--transition-base);
}

.flow-item:hover {
  background-color: rgba(243, 240, 239, 0.04);
}

.flow-number {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-primary-container);
  margin-bottom: 24px;
  display: block;
}

.flow-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-inverse-on-surface);
  margin-bottom: 16px;
}

.flow-desc {
  font-size: 15px;
  line-height: 24px;
  color: rgba(243, 240, 239, 0.6);
}

.flow-line {
  position: absolute;
  bottom: 0;
  left: 40px;
  right: 40px;
  height: 1px;
  background: linear-gradient(to right, var(--color-primary-container), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.flow-item:hover .flow-line {
  transform: scaleX(1);
}

/* ===================================
   CAPABILITIES SECTION
   =================================== */
#kabiliyetler {
  background-color: var(--color-surface-container-low);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.capabilities-intro {
  position: sticky;
  top: 100px;
}

.capabilities-intro p {
  font-size: 18px;
  line-height: 28px;
  color: var(--color-on-surface-variant);
  margin-top: 24px;
}

.capabilities-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.capability-item {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--rounded-lg);
  padding: 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.capability-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-primary-container), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.capability-item:hover {
  border-color: var(--color-outline);
  transform: translateX(4px);
  box-shadow: 0 4px 24px rgba(117, 90, 46, 0.08);
}

.capability-item:hover::before {
  transform: scaleX(1);
}

.capability-item + .capability-item {
  margin-top: 16px;
}

.capability-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-surface-container);
  border-radius: var(--rounded);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.capability-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.capability-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-on-surface);
  margin-bottom: 10px;
}

.capability-desc {
  font-size: 15px;
  line-height: 24px;
  color: var(--color-on-surface-variant);
}

/* ===================================
   SOLUTIONS SECTION
   =================================== */
#cozumler {
  background-color: var(--color-surface);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution-card {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
  position: relative;
}

.solution-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-primary-container), var(--color-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.solution-card:hover {
  border-color: var(--color-outline);
  box-shadow: 0 16px 48px rgba(117, 90, 46, 0.1);
  transform: translateY(-4px);
}

.solution-card:hover::after {
  transform: scaleX(1);
}

.solution-img-wrapper {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-surface-container);
}

.solution-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.solution-body {
  padding: 28px;
}

.solution-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-primary-container);
  margin-bottom: 12px;
}

.solution-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-on-surface);
  margin-bottom: 10px;
}

.solution-desc {
  font-size: 14px;
  line-height: 22px;
  color: var(--color-on-surface-variant);
}

/* ===================================
   USE CASES SECTION
   =================================== */
#kullanim-alanlari {
  background-color: var(--color-surface-container-low);
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.usecase-card {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--rounded-lg);
  padding: 36px 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.usecase-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, var(--color-primary-container), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.usecase-card:hover {
  border-color: var(--color-outline);
  box-shadow: 0 8px 32px rgba(117, 90, 46, 0.08);
  transform: translateY(-2px);
}

.usecase-card:hover::before {
  transform: scaleX(1);
}

.usecase-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--rounded);
  background-color: var(--color-surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-primary);
}

.usecase-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.usecase-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-on-surface);
  margin-bottom: 12px;
}

.usecase-desc {
  font-size: 14px;
  line-height: 22px;
  color: var(--color-on-surface-variant);
}

/* ===================================
   GLOBAL ACCESS SECTION
   =================================== */
#global-erisim {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  position: relative;
  overflow: hidden;
}

#global-erisim::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(197, 163, 113, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

#global-erisim .section-label {
  color: var(--color-inverse-primary);
}

#global-erisim .section-label::before {
  background-color: var(--color-inverse-primary);
}

#global-erisim .section-title {
  color: var(--color-inverse-on-surface);
}

.global-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.global-intro p {
  font-size: 18px;
  line-height: 30px;
  color: rgba(243, 240, 239, 0.75);
  margin-top: 32px;
}

.global-features {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid rgba(243, 240, 239, 0.1);
  border-radius: var(--rounded-lg);
  overflow: hidden;
}

.global-feature {
  padding: 36px;
  border-bottom: 1px solid rgba(243, 240, 239, 0.1);
  transition: background-color var(--transition-base);
}

.global-feature:last-child {
  border-bottom: none;
}

.global-feature:hover {
  background-color: rgba(243, 240, 239, 0.04);
}

.global-feature-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-primary-container);
  margin-bottom: 16px;
  display: block;
}

.global-feature-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-inverse-on-surface);
  margin-bottom: 10px;
}

.global-feature-desc {
  font-size: 15px;
  line-height: 24px;
  color: rgba(243, 240, 239, 0.6);
}

/* ===================================
   PARTNERS SECTION
   =================================== */
#cozum-ortaklari {
  background-color: var(--color-surface);
}

.partners-intro {
  max-width: 640px;
  margin-bottom: 64px;
}

.partners-intro p {
  font-size: 17px;
  line-height: 26px;
  color: var(--color-on-surface-variant);
  margin-top: 16px;
}

.partners-track-wrapper {
  overflow: hidden;
  position: relative;
}

.partners-track-wrapper::before,
.partners-track-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}

.partners-track-wrapper::before {
  left: 0;
  background: linear-gradient(to right, var(--color-surface), transparent);
}

.partners-track-wrapper::after {
  right: 0;
  background: linear-gradient(to left, var(--color-surface), transparent);
}

.partners-track {
  display: flex;
  gap: 40px;
  animation: scroll 20s linear infinite;
  width: max-content;
}

.partner-logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 200px;
  height: 80px;
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--rounded-lg);
  padding: 20px;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.partner-logo-item:hover {
  border-color: var(--color-primary-container);
  box-shadow: 0 0 16px rgba(197, 163, 113, 0.15);
}

.partner-logo-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.65;
  transition: all var(--transition-base);
}

.partner-logo-item:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ===================================
   GALLERY SECTION
   =================================== */
#galeri {
  background-color: var(--color-surface-container-low);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--rounded-lg);
  position: relative;
  cursor: pointer;
  background-color: var(--color-surface-container);
}



.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(28, 27, 27, 0.7), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: 24px;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-zoom {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(197, 163, 113, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
}

.gallery-zoom svg {
  width: 18px;
  height: 18px;
  stroke: #1c1b1b;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-color: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--rounded-lg);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 32px;
  color: white;
  cursor: pointer;
  line-height: 1;
  transition: opacity var(--transition-base);
  background: none;
  border: none;
  font-family: var(--font-primary);
}

.lightbox-close:hover {
  opacity: 0.7;
}

/* ===================================
   CONTACT SECTION
   =================================== */
#iletisim {
  background-color: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
}

#iletisim .section-label {
  color: var(--color-inverse-primary);
}

#iletisim .section-label::before {
  background-color: var(--color-inverse-primary);
}

#iletisim .section-title {
  color: var(--color-inverse-on-surface);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.contact-info-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--rounded);
  background-color: rgba(243, 240, 239, 0.08);
  border: 1px solid rgba(243, 240, 239, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary-container);
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-info-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(243, 240, 239, 0.45);
  margin-bottom: 6px;
}

.contact-info-value {
  font-size: 16px;
  line-height: 24px;
  color: var(--color-inverse-on-surface);
}

.contact-info-value a {
  color: var(--color-inverse-on-surface);
  transition: color var(--transition-base);
}

.contact-info-value a:hover {
  color: var(--color-primary-container);
}

/* Contact Form */
.contact-form {
  background-color: rgba(243, 240, 239, 0.04);
  border: 1px solid rgba(243, 240, 239, 0.1);
  border-radius: var(--rounded-lg);
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(243, 240, 239, 0.5);
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  background-color: rgba(243, 240, 239, 0.06);
  border: 1px solid rgba(243, 240, 239, 0.15);
  border-radius: var(--rounded);
  padding: 14px 16px;
  font-family: var(--font-primary);
  font-size: 15px;
  color: var(--color-inverse-on-surface);
  outline: none;
  transition: all var(--transition-base);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(243, 240, 239, 0.3);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary-container);
  box-shadow: 0 0 0 2px rgba(197, 163, 113, 0.15);
  background-color: rgba(243, 240, 239, 0.08);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ===================================
   FOOTER
   =================================== */
#footer {
  background-color: #141414;
  color: rgba(243, 240, 239, 0.5);
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--margin-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-logo img {
  height: 28px;
  width: auto;
  opacity: 0.5;
  filter: grayscale(100%);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: rgba(243, 240, 239, 0.4);
  transition: color var(--transition-base);
}

.footer-link:hover {
  color: var(--color-primary-container);
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.15); }
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
  .container,
  .header-inner,
  .hero-content,
  .footer-inner {
    padding-left: 40px;
    padding-right: 40px;
  }

  .solutions-grid,
  .usecases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .capabilities-grid,
  .global-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .capabilities-intro {
    position: static;
  }
}

@media (max-width: 768px) {
  .container,
  .header-inner,
  .hero-content,
  .footer-inner {
    padding-left: var(--margin-mobile);
    padding-right: var(--margin-mobile);
  }

  .section {
    padding: 72px 0;
  }

  .header-nav {
    display: none;
    position: fixed;
    inset: 72px 0 0 0;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px var(--margin-mobile);
    gap: 8px;
    border-top: 1px solid var(--color-outline-variant);
    overflow-y: auto;
  }

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

  .nav-link {
    width: 100%;
    padding: 12px 0;
    font-size: 15px;
  }

  .nav-link::after {
    display: none;
  }

  .header-actions .btn-primary {
    display: none;
  }

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

  .hero-title {
    font-size: clamp(32px, 8vw, 48px);
  }

  .hero-desc {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title {
    font-size: 30px;
    line-height: 38px;
  }

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

  .solutions-grid,
  .usecases-grid {
    grid-template-columns: 1fr;
  }

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



  .contact-form {
    padding: 32px 24px;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item:nth-child(1),
  .gallery-item:nth-child(5) {
    grid-column: span 1;
  }

  .global-layout {
    gap: 32px;
  }
}