/* ============================================
   Prime Istanbul Residences - Clean CSS
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Raleway:wght@300;400;500;600;700;800&family=Roboto:wght@300;400;500;700&display=swap');

/* --- CSS Variables --- */
:root {
  --color-dark: #231f25;
  --color-dark-alt: rgba(35, 31, 37, 0.95);
  --color-white: #ffffff;
  --color-light: #f8f8f8;
  --color-accent: #2f576f;
  --color-border: #e0dede;
  --color-text: #333333;
  --color-text-light: #666666;
  --font-heading: 'Raleway', sans-serif;
  --font-body: 'Roboto', sans-serif;
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
  --shadow-heavy: 0 10px 60px rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.4; }

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 30px;
  max-width: 100%;
  position: relative;
}

.logo { display: flex; align-items: center; }
.logo img { height: 60px; width: auto; transition: var(--transition); }

/* Hamburger */
.menu-toggle {
  position: absolute;
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1010;
  padding: 8px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-dark);
  transition: var(--transition);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

/* Flyout Nav */
.flyout-nav {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1005;
}

.flyout-nav.active { opacity: 1; visibility: visible; }

.flyout-nav ul {
  list-style: none;
  text-align: center;
}

.flyout-nav li {
  margin: 12px 0;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.5s ease;
}

.flyout-nav.active li {
  transform: translateY(0);
  opacity: 1;
}

.flyout-nav.active li:nth-child(1) { transition-delay: 0.1s; }
.flyout-nav.active li:nth-child(2) { transition-delay: 0.15s; }
.flyout-nav.active li:nth-child(3) { transition-delay: 0.2s; }
.flyout-nav.active li:nth-child(4) { transition-delay: 0.25s; }
.flyout-nav.active li:nth-child(5) { transition-delay: 0.3s; }
.flyout-nav.active li:nth-child(6) { transition-delay: 0.35s; }
.flyout-nav.active li:nth-child(7) { transition-delay: 0.4s; }
.flyout-nav.active li:nth-child(8) { transition-delay: 0.45s; }

.flyout-nav a {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-dark);
  letter-spacing: 1px;
  padding: 8px 20px;
  display: inline-block;
  position: relative;
}

.flyout-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-dark);
  transition: transform 0.3s ease;
}

.flyout-nav a:hover::after { transform: translateX(-50%) scaleX(1); }

/* --- Hero Slider --- */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.hero-slider .slides {
  display: flex;
  height: 100%;
  transition: transform 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}

.hero-slider .slide {
  min-width: 100%;
  height: 100%;
  position: relative;
}

.hero-slider .slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slide-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(255, 255, 255, 0.15);
  padding: 20px;
}

.slide-overlay h2 {
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 800;
  color: #000;
  margin-bottom: 30px;
  text-shadow: 0 2px 20px rgba(255,255,255,0.5);
}

.slide-overlay .btn {
  display: inline-block;
  padding: 12px 36px;
  background: #000;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 3px;
  border: 1px solid #000;
  cursor: pointer;
  transition: var(--transition);
}

.slide-overlay .btn:hover {
  background: #fff;
  color: #000;
}

/* Slider arrows */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  font-size: 2rem;
  color: #fff;
  transition: var(--transition);
  background: rgba(0,0,0,0.2);
  border-radius: 50%;
  border: none;
}

.slider-arrow:hover { background: rgba(0,0,0,0.5); }
.slider-arrow.prev { left: 30px; }
.slider-arrow.next { right: 30px; }

/* Slider dots */
.slider-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.slider-dots .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
}

.slider-dots .dot.active { background: #fff; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid rgba(255,255,255,0.8);
  border-radius: 20px;
  z-index: 10;
  cursor: pointer;
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 10px;
  background: #fff;
  border-radius: 2px;
  animation: scrollAnim 2s infinite;
}

@keyframes scrollAnim {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 28px; }
}

/* --- Section Styles --- */
.section { padding: 80px 0; }

.section-title {
  text-align: center;
  margin-bottom: 50px;
  position: relative;
}

.section-title h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 600;
  letter-spacing: 1px;
  display: inline-block;
  position: relative;
}

.section-title h3::before,
.section-title h3::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 60px;
  height: 1px;
  background: var(--color-border);
}

.section-title h3::before { right: calc(100% + 20px); }
.section-title h3::after { left: calc(100% + 20px); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 30px;
}

/* --- Intro Section --- */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.intro-col h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 15px;
  line-height: 1.5;
}

.intro-col h6, .intro-col .text-content {
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-text-light);
}

.intro-col:first-child { text-align: right; }

/* --- Services Icons --- */
.services-bar {
  padding: 40px 0;
  background: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
  text-align: center;
}

.service-item { padding: 15px 5px; transition: var(--transition); }
.service-item:hover { transform: translateY(-4px); }
.service-item img { width: 90px; height: 90px; margin: 0 auto 14px; object-fit: contain; }
.service-item span { display: block; font-size: 1.2rem; font-weight: 500; color: var(--color-text); line-height: 1.3; }

/* --- Split Sections (Image + Text) --- */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 500px;
}

.split-image {
  background-size: cover;
  background-position: center;
  min-height: 400px;
}

.split-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8% 10%;
}

.split-content.dark {
  background: var(--color-dark);
  color: var(--color-white);
}

.split-content h5 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  margin-bottom: 20px;
  line-height: 1.5;
}

.split-content h6, .split-content p {
  font-size: 0.92rem;
  font-weight: 400;
  line-height: 1.8;
  opacity: 0.92;
  margin-bottom: 25px;
}

/* --- Social Cards --- */
.social-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.social-card {
  padding: 0 5%;
  text-align: center;
}

.social-card img {
  width: 100%;
  border-radius: 4px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.social-card:hover img { transform: scale(1.02); box-shadow: var(--shadow); }
.social-card h6 { font-size: 1rem; font-weight: 700; margin-bottom: 15px; }
.social-card p { font-size: 0.88rem; line-height: 1.8; color: var(--color-text-light); }

/* --- Tabs (Oda Planlari) --- */
.tabs-container { margin-top: 20px; }

.tab-buttons {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 30px;
}

.tab-btn {
  padding: 12px 30px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: #ebeaea;
  color: var(--color-text);
  transition: var(--transition);
  border-top: 2px solid transparent;
}

.tab-btn.active, .tab-btn:hover {
  background: var(--color-white);
  border-top-color: var(--color-dark);
}

.tab-panel { display: none; }
.tab-panel.active { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
.tab-panel img { width: 100%; border-radius: 4px; }

.tab-panel .plan-details h6 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--color-border);
}

.tab-panel .plan-details p { font-size: 0.95rem; line-height: 2; }
.tab-panel .plan-details strong { font-weight: 600; }

/* --- Gallery --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.gallery-item {
  overflow: hidden;
  cursor: pointer;
  position: relative;
  aspect-ratio: 3/2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover img { transform: scale(1.08); }

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  transition: var(--transition);
}

.gallery-item:hover::after { background: rgba(0, 0, 0, 0.15); }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.active { display: flex; opacity: 1; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  z-index: 2001;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  z-index: 2001;
  background: rgba(255,255,255,0.1);
  border: none;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.lightbox-nav:hover { background: rgba(255,255,255,0.25); }
.lightbox-nav.lb-prev { left: 20px; }
.lightbox-nav.lb-next { right: 20px; }

/* --- Location --- */
.location-section { padding: 0; }
.location-section img { width: 100%; }

.location-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.location-text {
  padding: 5% 5% 5% 40px;
}

.location-text h4 {
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 15px;
}

.location-text img { border-radius: 4px; }

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  text-align: center;
  padding: 60px 20px 30px;
}

.footer img { margin: 0 auto 20px; height: 60px; }

.footer-address {
  font-size: 0.9rem;
  line-height: 1.8;
  opacity: 0.8;
  margin-bottom: 30px;
}

.footer-copyright {
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  opacity: 0.6;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-dark);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 900;
  box-shadow: var(--shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover { background: var(--color-accent); transform: translateY(-3px); }

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(4, 1fr); gap: 15px; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .intro-grid { gap: 30px; }
}

@media (max-width: 768px) {
  html { scroll-padding-top: 70px; }
  .header-inner { padding: 8px 20px; }
  .logo img { height: 50px; }
  .menu-toggle { right: 20px; }
  .flyout-nav a { font-size: 1.3rem; }

  .section { padding: 50px 0; }
  .container { padding: 0 20px; }

  .intro-grid { grid-template-columns: 1fr; gap: 30px; }
  .intro-col:first-child { text-align: left; }

  .services-grid { grid-template-columns: repeat(4, 1fr); }

  .split-section { grid-template-columns: 1fr; }
  .split-image { min-height: 300px; }
  .split-content { padding: 40px 25px; }

  .social-cards { grid-template-columns: 1fr; gap: 40px; }

  .tab-buttons { flex-wrap: wrap; }
  .tab-btn { flex: 1; min-width: 80px; font-size: 0.95rem; padding: 10px 15px; }
  .tab-panel.active { grid-template-columns: 1fr; }

  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .location-info { grid-template-columns: 1fr; }
  .location-text { padding: 25px 20px; }
}

@media (max-width: 480px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .slide-overlay h2 { font-size: 1.4rem; }
  .slide-overlay .btn { padding: 10px 24px; font-size: 0.75rem; letter-spacing: 2px; }
  .slider-arrow { width: 40px; height: 40px; font-size: 1.5rem; }
  .slider-arrow.prev { left: 10px; }
  .slider-arrow.next { right: 10px; }
}