/* ==========================================================================
   IRMAK İNVEST - KURUMSAL DESIGN SYSTEM & CSS STYLESHEET
   ========================================================================== */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@300;400;500;600;700;800&family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

/* --- CSS Variables (Design Tokens) --- */
:root {
  /* Brand & Core Palette */
  --color-primary: #111111;
  --color-on-primary: #ffffff;
  --color-secondary: #6e5c2d;
  --color-secondary-hover: #86723d;
  --color-secondary-light: #f9e0a4;
  --color-background: #f9f9f9;
  --color-surface: #ffffff;
  --color-surface-container: #f3f3f3;
  --color-surface-container-high: #e8e8e8;
  --color-text-main: #1a1c1c;
  --color-text-muted: #4c4546;
  --color-border: #e2e2e2;
  --color-border-dark: #cfc4c5;
  --color-error: #ba1a1a;

  /* Typography */
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing Scale */
  --container-max: 1280px;
  --margin-desktop: 64px;
  --margin-mobile: 20px;
  --gutter: 24px;
  --section-gap: 100px;

  /* Transitions & Animations */
  --anim-duration: 0.8s;
  --anim-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.25s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows & Elevations */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-background);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background-color: var(--color-secondary);
  color: #ffffff;
}

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

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

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

@media (max-width: 768px) {
  .container {
    padding-left: var(--margin-mobile);
    padding-right: var(--margin-mobile);
  }
}

.grid {
  display: grid;
  gap: var(--gutter);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

@media (min-width: 576px) {
  .grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 576px) and (max-width: 991px) {
  .grid-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 992px) {
  .grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 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-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }

/* --- Typography Utilities --- */
.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }

.display-lg {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.headline-md {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.3;
}

.headline-sm {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

.label-caps {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-secondary); }
.text-white { color: #ffffff; }

@media (max-width: 768px) {
  .display-lg { font-size: 2.25rem; }
  .headline-lg { font-size: 1.75rem; }
  .headline-md { font-size: 1.35rem; }
  .headline-sm { font-size: 1.1rem; }
}

@media (max-width: 480px) {
  .display-lg { font-size: 1.75rem; }
  .headline-lg { font-size: 1.4rem; }
  .headline-md { font-size: 1.2rem; }
  .headline-sm { font-size: 1rem; }
}

/* --- Buttons & Interactive Elements --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 1rem 2rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

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

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

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

/* Button Shimmer Effect */
.btn-shimmer {
  position: relative;
  overflow: hidden;
}

.btn-shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}

.btn-shimmer:hover::after {
  left: 150%;
}

/* --- Header / TopAppBar --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: padding var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.logo-link {
  display: block;
  width: 160px;
}

.logo-img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-fast);
}

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

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

@media (max-width: 992px) {
  .nav-desktop, .header-cta {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
}

/* Mobile Menu Drawer */
.mobile-menu {
  position: fixed;
  inset: 0;
  background-color: var(--color-surface);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

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

.mobile-menu-header {
  display: flex;
  justify-content: flex-end;
  padding: 1.5rem var(--margin-mobile);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary);
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-grow: 1;
  gap: 2rem;
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-text-main);
  transition: color var(--transition-fast);
}

.mobile-nav-link:hover {
  color: var(--color-secondary);
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  width: 100%;
  height: 85vh;
  min-height: 600px;
  max-height: 900px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

@media (max-width: 768px) {
  .hero-section { height: 75vh; min-height: 500px; }
}

.hero-parallax-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url('../images/hero-bg.jpg?v=2');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  transform: scale(1.02);
  transition: transform var(--transition-normal);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0.15) 50%, rgba(0,0,0,0.45) 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 720px;
  color: #ffffff;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(110, 92, 45, 0.85);
  backdrop-filter: blur(4px);
  color: #ffffff;
  padding: 0.4rem 1rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--color-secondary-light);
}

.hero-title {
  color: #ffffff;
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

@media (max-width: 480px) {
  .hero-subtitle { font-size: 0.95rem; margin-bottom: 1.5rem; }
  .hero-badge { margin-bottom: 1rem; font-size: 0.65rem; }
  .hero-content .flex { flex-direction: column; align-items: flex-start; }
  .hero-content .btn { width: 100%; justify-content: center; }
}

/* --- Sections Common --- */
.section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

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

.section-header {
  margin-bottom: 3.5rem;
}

@media (max-width: 768px) {
  .section-header { margin-bottom: 2rem; }
  :root { --section-gap: 60px; }
}

@media (max-width: 480px) {
  :root { --section-gap: 40px; }
}

.section-header.center {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
  display: block;
}

/* --- Featured Projects Cards --- */
.card-interactive {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card-interactive:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

@media (hover: none) {
  .card-interactive:hover { transform: none; box-shadow: none; border-color: var(--color-border); }
  .card-interactive:active { transform: translateY(-3px); box-shadow: var(--shadow-md); }
  .card-interactive:hover .card-image-wrap img { transform: none; }
}

.card-image-wrap {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--anim-easing);
}

.card-interactive:hover .card-image-wrap img {
  transform: scale(1.08);
}

.card-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.3rem 0.75rem;
  text-transform: uppercase;
}

.card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

@media (max-width: 576px) {
  .card-body { padding: 1.25rem; }
  .card-footer-specs { gap: 0.75rem; flex-wrap: wrap; }
}

.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.card-price {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-secondary);
}

.card-location {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.card-footer-specs {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  margin-top: auto;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-family: var(--font-display);
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.spec-item .material-symbols-outlined {
  font-size: 1.1rem;
  color: var(--color-primary);
}

/* --- Trust Section Cards --- */
.trust-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
}

.trust-icon-box {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal), background-color var(--transition-normal);
}

.trust-card:hover .trust-icon-box {
  transform: scale(1.1);
  border-color: var(--color-secondary);
  background-color: var(--color-secondary-light);
}

.trust-icon-box .material-symbols-outlined {
  font-size: 2.25rem;
  color: var(--color-primary);
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.about-experience-card {
  position: relative;
  border-left: 4px solid var(--color-secondary);
  padding-left: 1.5rem;
}

.stats-counter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 576px) {
  .stats-counter-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
}
@media (max-width: 380px) {
  .stats-counter-grid { grid-template-columns: 1fr; }
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Contact Form Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 3.5rem;
  align-items: start;
}

@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-info-card {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  height: 100%;
}

@media (max-width: 992px) {
  .contact-info-card { height: auto; }
}

@media (max-width: 576px) {
  .contact-info-card { padding: 2rem 1.5rem; gap: 1.5rem; }
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.info-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--color-secondary-light);
  flex-shrink: 0;
}

.form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-main);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.9rem 1.25rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-dark);
  color: var(--color-text-main);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(17, 17, 17, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

@media (max-width: 576px) {
  .form-textarea { min-height: 100px; }
  .form-input, .form-textarea { font-size: 16px; } /* prevent iOS Safari auto-zoom */
}

/* Contact Form Card */
.contact-form-card {
  background-color: var(--color-surface);
  padding: 2.5rem;
  border: 1px solid var(--color-border);
}

@media (max-width: 576px) {
  .contact-form-card { padding: 1.5rem 1rem; }
}

/* Toast Message */
.toast-msg {
  display: none;
  padding: 1rem 1.25rem;
  background-color: #10b981;
  color: white;
  font-size: 0.9rem;
  margin-top: 1rem;
  border-radius: 4px;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 4rem;
  padding-bottom: 2rem;
  margin-top: auto;
}

@media (max-width: 768px) {
  .site-footer { padding-top: 2.5rem; }
  .footer-top { gap: 2rem; }
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 576px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 1rem;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #ffffff;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-secondary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* --- Entrance Scroll Animations --- */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--anim-duration) var(--anim-easing), transform var(--anim-duration) var(--anim-easing);
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-parallax-bg {
    background-attachment: scroll;
  }
}