/*
Theme Name: Birleşika
Theme URI: https://birlesika.com.tr
Author: Birleşik Atölyeler
Author URI: https://birlesika.com.tr
Description: Birleşik Atölyeler - 18 uzman atölyeden oluşan entegre üretim ekosistemi. Özel WordPress teması.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.2
License: All Rights Reserved
Text Domain: birlesika
*/

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

:root {
  --color-dark: #1A1917;
  --color-dark-alt: #2C2C2A;
  --color-bg: #F5F4F1;
  --color-bg-alt: #EDECEA;
  --color-bg-warm: #EBEAE5;
  --color-text: #5A5652;
  --color-text-light: #9A9694;
  --color-border: #D0CDC8;
  --color-border-light: #DCD9D4;
  --color-white: #FFFFFF;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ===== TYPOGRAPHY ===== */
.font-serif {
  font-family: 'Lora', ui-serif, Georgia, serif;
  font-weight: 400;
}

h1, h2, h3, h4 {
  font-family: 'Lora', ui-serif, Georgia, serif;
  line-height: 1.3;
  font-weight: 400;
}

a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== GRID SYSTEM ===== */
.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(1, 1fr); }
.grid-3 { grid-template-columns: repeat(1, 1fr); }
.grid-4 { grid-template-columns: repeat(1, 1fr); }
.grid-6 { grid-template-columns: repeat(2, 1fr); }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-6 { grid-template-columns: repeat(6, 1fr); }
}

/* ===== FLEX ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }
.gap-16 { gap: 4rem; }
.flex-1 { flex: 1; }

/* ===== STICKY HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 244, 241, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: opacity 0.3s;
}

.site-header .logo:hover img { opacity: 0.8; }

/* Desktop Nav */
.desktop-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.desktop-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  transition: all 0.3s;
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--color-dark);
  transform: translateY(-2px);
}

.desktop-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
}

.lang-switch .active { color: var(--color-dark); }
.lang-switch .inactive { color: var(--color-text-light); }
.lang-switch .divider { color: var(--color-border); }

@media (min-width: 1024px) {
  .desktop-nav { display: flex; }
  .header-actions { display: flex; }
  .mobile-toggle { display: none !important; }
}

/* Mobile Menu */
.mobile-toggle {
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-dark);
}

.mobile-toggle svg { width: 24px; height: 24px; }

.mobile-menu {
  display: none;
  position: absolute;
  top: 96px;
  left: 0;
  width: 100%;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.mobile-menu.is-open { display: block; }

.mobile-menu nav { display: flex; flex-direction: column; gap: 1rem; }

.mobile-menu nav a {
  font-size: 1.125rem;
  font-family: 'Playfair Display', serif;
  color: var(--color-text);
}

.mobile-menu nav a.active {
  color: var(--color-dark);
  font-weight: 600;
}

@media (min-width: 1024px) {
  .mobile-menu { display: none !important; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-white);
  color: var(--color-dark);
}
.btn-primary:hover { background: var(--color-bg); }

.btn-dark {
  background: var(--color-dark);
  color: var(--color-white);
}
.btn-dark:hover { background: var(--color-dark-alt); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-text);
  color: var(--color-white);
}
.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.05);
}

.btn-outline-dark {
  background: transparent;
  border: 1px solid var(--color-dark);
  color: var(--color-dark);
}
.btn-outline-dark:hover {
  background: var(--color-dark);
  color: var(--color-white);
}

.btn-link {
  background: none;
  padding: 0;
  border-bottom: 2px solid var(--color-dark);
  padding-bottom: 0.25rem;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  color: var(--color-dark);
}
.btn-link:hover { color: var(--color-text); border-color: var(--color-text); }

.btn-contact {
  background: var(--color-bg);
  color: var(--color-dark);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0;
}
.btn-contact:hover { background: var(--color-bg-alt); }

/* ===== FILTER BUTTONS ===== */
.filter-btn {
  padding: 0.375rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.3s;
}

.filter-btn:hover {
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.filter-btn.active {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-white);
}

/* Tab Buttons */
.tab-btn {
  padding: 1.5rem 0;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: none;
  border: none;
  color: var(--color-text-light);
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.3s;
}

.tab-btn:hover { color: var(--color-text); }

.tab-btn.active { color: var(--color-dark); }

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-dark);
}

/* ===== SECTIONS ===== */
.section { padding: 6rem 0; }
.section-sm { padding: 3rem 0; }
.section-lg { padding: 8rem 0; }

.section-dark { background: var(--color-dark); color: var(--color-white); }
.section-darker { background: var(--color-dark-alt); color: var(--color-white); }
.section-light { background: var(--color-bg); }
.section-alt { background: var(--color-bg-alt); }
.section-white { background: var(--color-white); }

/* ===== EYEBROW LABELS ===== */
.eyebrow {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 1.5rem;
}

.eyebrow-sm {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 1rem;
}

.eyebrow-muted { color: var(--color-text); }
.eyebrow-light { color: var(--color-text-light); }
.eyebrow-white { color: var(--color-text-light); }

/* ===== CARDS ===== */
.project-card {
  background: var(--color-white);
  padding: 1.25rem;
  border: 1px solid transparent;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card:hover {
  border-color: var(--color-border);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
  transform: translateY(-8px);
}

.project-card .card-image {
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--color-bg-alt);
  margin-bottom: 1.25rem;
}

.project-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s;
}

.project-card:hover .card-image img { transform: scale(1.05); }

.project-card .card-category {
  font-size: 10px;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.project-card .card-title {
  font-size: 1.5rem;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

.project-card .card-desc {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card .card-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-bg-alt);
}

/* Service Card */
.service-card {
  background: var(--color-white);
  overflow: hidden;
  border: 1px solid #E0DDD8;
  transition: all 0.3s;
}

.service-card:hover { border-color: var(--color-dark); }

.service-card .card-image {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.service-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s;
}

.service-card:hover .card-image img { transform: scale(1.05); }

.service-card .card-body { padding: 1.25rem; }

.service-card .card-title {
  font-size: 1.125rem;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

/* Material Tags */
.material-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.125rem 0.5rem;
  display: inline-block;
}

.material-tag-metal { background: #E8E4DF; color: #5A5652; }
.material-tag-ahsap { background: #EDE8E0; color: #6B5A40; }
.material-tag-cam { background: #E4EAF0; color: #3A5A72; }
.material-tag-dogaltas { background: #EAE8E4; color: #5A5248; }
.material-tag-kompozit { background: #E8EAE4; color: #4A5A3A; }
.material-tag-ozel { background: #EAE4EA; color: #5A3A5A; }

/* ===== STEP CIRCLES ===== */
.step-circle {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: var(--color-dark);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
  border: 4px solid var(--color-bg-alt);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
  .step-circle { width: 6rem; height: 6rem; font-size: 1.875rem; }
}

/* ===== FOOTER ===== */
.footer-cta {
  background: var(--color-dark-alt);
  color: var(--color-white);
  padding: 6rem 0;
  text-align: center;
}

.site-footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 4rem 0;
  border-top: 1px solid var(--color-dark-alt);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

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

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

.footer-col h4 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: 0.75rem; }

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: color 0.3s;
}

.footer-col ul li a:hover { color: var(--color-white); }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-dark-alt);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  font-size: 0.75rem;
  color: var(--color-text);
}

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

/* ===== HERO SECTIONS ===== */
.hero-home {
  background: var(--color-dark);
  color: var(--color-white);
  min-height: 90vh;
  display: flex;
  flex-direction: column;
}

@media (min-width: 768px) {
  .hero-home { flex-direction: row; }
}

.hero-home .hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 5rem 1.5rem;
  max-width: 48rem;
}

@media (min-width: 768px) {
  .hero-home .hero-content { padding: 0 4rem; }
}

.hero-home .hero-image {
  flex: 1;
  display: none;
  position: relative;
}

@media (min-width: 768px) {
  .hero-home .hero-image { display: block; }
}

.hero-home .hero-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-home .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, var(--color-dark), transparent, transparent);
  opacity: 0.8;
}

/* ===== LIGHTBOX ===== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.lightbox.is-open { display: flex; }

.lightbox img {
  max-width: 100%;
  max-height: 699px;
  object-fit: contain;
}

.lightbox .close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 2rem;
  transition: color 0.3s;
}

.lightbox .close-btn:hover { color: white; }

/* ===== CAPACITY TABLE ===== */
.capacity-table {
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  overflow: hidden;
}

.capacity-table .table-header {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 1rem 1.5rem;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.capacity-table .table-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
}

@media (min-width: 640px) {
  .capacity-table .table-grid { grid-template-columns: repeat(2, 1fr); }
}

.capacity-table .table-cell {
  background: var(--color-white);
  padding: 1.25rem;
  transition: background 0.3s;
}

.capacity-table .table-cell:hover { background: var(--color-bg); }

.capacity-table .cell-title {
  font-weight: 700;
  color: var(--color-dark);
  font-size: 0.9375rem;
  margin-bottom: 0.375rem;
}

.capacity-table .cell-desc {
  color: var(--color-text);
  font-size: 0.8125rem;
  font-weight: 300;
  line-height: 1.5;
}

/* ===== FORM STYLES ===== */
.form-field {
  margin-bottom: 2rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  background: transparent;
  color: var(--color-dark);
  font-size: 1rem;
  transition: border-color 0.3s;
  outline: none;
}

.form-input:focus { border-color: var(--color-dark); }

.form-textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  padding: 1rem;
  background: transparent;
  color: var(--color-dark);
  font-size: 1rem;
  transition: border-color 0.3s;
  outline: none;
  resize: none;
  min-height: 120px;
}

.form-textarea:focus { border-color: var(--color-dark); }

.form-select {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  background: transparent;
  color: var(--color-dark);
  font-size: 1rem;
  cursor: pointer;
  appearance: none;
  outline: none;
}

/* ===== ANIMATIONS (AOS alternatives) ===== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.fade-in.is-visible { opacity: 1; }

/* Staggered children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }

/* ===== UTILITY ===== */
.text-center { text-align: center; }
.text-white { color: var(--color-white); }
.text-muted { color: var(--color-text); }
.text-light { color: var(--color-text-light); }
.text-warm { color: var(--color-border); }
.font-light { font-weight: 300; }
.font-bold { font-weight: 700; }
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.05em; }
.tracking-wider { letter-spacing: 0.1em; }
.tracking-widest { letter-spacing: 0.2em; }
.leading-tight { line-height: 1.2; }
.leading-relaxed { line-height: 1.7; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-16 { margin-bottom: 4rem; }
.mt-auto { margin-top: auto; }
.pt-4 { padding-top: 1rem; }
.py-4 { padding: 1rem 0; }
.py-8 { padding: 2rem 0; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }
.object-cover { object-fit: cover; }
.grayscale { filter: grayscale(100%); }
.grayscale-hover:hover { filter: grayscale(0); }
.hidden { display: none; }
.block { display: block; }
.inline-flex { display: inline-flex; }

/* ===== ASPECT RATIOS ===== */
.aspect-video { aspect-ratio: 16 / 9; }
.aspect-4-3 { aspect-ratio: 4 / 3; }
.aspect-3-4 { aspect-ratio: 3 / 4; }
.aspect-4-5 { aspect-ratio: 4 / 5; }
.aspect-16-10 { aspect-ratio: 16 / 10; }
.aspect-square { aspect-ratio: 1; }

/* ===== SCROLLBAR ===== */
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }
.no-scrollbar::-webkit-scrollbar { display: none; }

/* ===== LINE CLAMP ===== */
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-4 {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== CONTACT FORM 7 STYLING ===== */
.wpcf7 .wpcf7-form-control {
  font-family: 'Inter', sans-serif;
}

.wpcf7 input[type="text"],
.wpcf7 input[type="email"],
.wpcf7 input[type="tel"],
.wpcf7 select {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  background: transparent;
  color: var(--color-dark);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s;
}

.wpcf7 input:focus,
.wpcf7 select:focus { border-color: var(--color-dark); }

.wpcf7 textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  padding: 1rem;
  background: transparent;
  color: var(--color-dark);
  font-size: 1rem;
  outline: none;
  resize: none;
  min-height: 120px;
}

.wpcf7 textarea:focus { border-color: var(--color-dark); }

.wpcf7 input[type="submit"] {
  width: 100%;
  background: var(--color-dark);
  color: white;
  padding: 1.25rem;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}

.wpcf7 input[type="submit"]:hover { background: var(--color-dark-alt); }