/* ==========================================================================
   Öncü Proje — Design Tokens
   Palette: structural turquoise + dark navy, referencing the Öncü Proje mark.
   Swap --op-teal-* below once exact brand hex values are sampled from the
   final logo artwork.
   ========================================================================== */
:root {
  /* Brand */
  --op-teal-500: #3AAFB3;   /* primary accent — buttons, links (large/UI use) */
  --op-teal-600: #218589;   /* accessible text/icon variant on white */
  --op-teal-700: #17696D;   /* hover/active state */
  --op-teal-100: #E3F5F5;   /* tint — badges, soft section backgrounds */

  --op-navy-900: #0D141C;   /* header / footer / hero overlay */
  --op-navy-800: #16212C;   /* secondary dark surface */
  --op-navy-700: #1F2C39;   /* dark borders / hover on dark */

  --op-ink: #1B242D;        /* body text */
  --op-ink-soft: #55636F;   /* secondary text */
  --op-paper: #F5F7F8;      /* page background */
  --op-white: #FFFFFF;
  --op-line: #E1E7EA;       /* hairline borders */

  --op-whatsapp: #25D366;

  /* Type */
  --op-font-display: "Exo 2", "Segoe UI", sans-serif;
  --op-font-body: "Exo 2", "Segoe UI", sans-serif;

  /* Layout */
  --op-radius: 10px;
  --op-shadow: 0 8px 24px rgba(13, 20, 28, 0.08);
  --op-shadow-lg: 0 16px 40px rgba(13, 20, 28, 0.14);
  --op-transition: 200ms ease;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Base
   ========================================================================== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--op-font-body);
  color: var(--op-ink);
  background-color: var(--op-paper);
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--op-font-display);
  font-weight: 600;
  color: var(--op-navy-900);
  letter-spacing: -0.01em;
}

a {
  color: var(--op-teal-600);
  text-decoration: none;
}

a:hover {
  color: var(--op-teal-700);
}

main {
  min-height: 60vh;
}

:focus-visible {
  outline: 2px solid var(--op-teal-500);
  outline-offset: 2px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--op-font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--op-teal-600);
  margin-bottom: 0.5rem;
}

/* Signature device: every section heading carries a short structural rule
   underneath it — a nod to the technical/blueprint register of a
   construction & structural-engineering brand. */
.section-title {
  position: relative;
  padding-bottom: 0.85rem;
  margin-bottom: 2rem;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 3px;
  background: var(--op-teal-500);
  border-radius: 2px;
}

.section-title.text-center::after {
  left: 50%;
  transform: translateX(-50%);
}

/* ==========================================================================
   Live search
   ========================================================================== */
.search-box {
  position: relative;
  max-width: 420px;
  margin: 0 auto 2.5rem;
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--op-ink-soft);
  pointer-events: none;
}

.search-box .form-control {
  padding-left: 2.75rem;
  border-radius: 999px;
  border-color: var(--op-line);
}

.search-box .form-control:focus {
  border-color: var(--op-teal-500);
  box-shadow: 0 0 0 0.2rem rgba(58, 175, 179, 0.18);
}

.search-empty {
  text-align: center;
  color: var(--op-ink-soft);
  padding: 2rem 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-op-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--op-teal-500);
  border: 1px solid var(--op-teal-500);
  color: var(--op-white);
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: var(--op-radius);
  transition: background-color var(--op-transition), border-color var(--op-transition), transform var(--op-transition);
}

.btn-op-primary:hover,
.btn-op-primary:focus-visible {
  background-color: var(--op-teal-700);
  border-color: var(--op-teal-700);
  color: var(--op-white);
  transform: translateY(-1px);
}

.btn-op-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: var(--op-white);
  font-weight: 600;
  padding: 0.6rem 1.4rem;
  border-radius: var(--op-radius);
  transition: border-color var(--op-transition), background-color var(--op-transition);
}

.btn-op-outline:hover,
.btn-op-outline:focus-visible {
  border-color: var(--op-teal-500);
  background-color: rgba(58, 175, 179, 0.12);
  color: var(--op-white);
}

/* ==========================================================================
   Header / Navbar
   ========================================================================== */
.site-header {
  background-color: var(--op-navy-900);
  border-bottom: 1px solid var(--op-navy-700);
}

.site-header .navbar-brand {
  font-family: var(--op-font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  color: var(--op-white);
}

.site-header .navbar-brand .brand-mark {
  color: var(--op-teal-500);
}

.navbar-brand-logo {
  display: block;
  height: 60px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
}

@media (max-width: 575.98px) {
  .navbar-brand-logo {
    height: 46px;
  }
}

.site-header .nav-link {
  position: relative;
  color: rgba(255, 255, 255, 0.82);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  padding: 0.5rem 0.9rem;
  transition: color var(--op-transition);
}

.site-header .nav-link::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--op-teal-500);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--op-transition);
}

.site-header .nav-link:hover,
.site-header .nav-link:focus-visible,
.site-header .nav-link.active {
  color: var(--op-white);
}

.site-header .nav-link:hover::after,
.site-header .nav-link:focus-visible::after,
.site-header .nav-link.active::after {
  transform: scaleX(1);
}

.site-header .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.25);
  padding: 0.4rem 0.6rem;
}

.site-header .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(58, 175, 179, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.nav-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.85);
  transition: background-color var(--op-transition), border-color var(--op-transition), color var(--op-transition);
}

.nav-icon-link:hover,
.nav-icon-link:focus-visible {
  background-color: var(--op-teal-500);
  border-color: var(--op-teal-500);
  color: var(--op-white);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--op-navy-900);
  color: rgba(255, 255, 255, 0.72);
  border-top: 3px solid var(--op-teal-500);
  padding: 3.5rem 0 1.5rem;
  margin-top: 4rem;
}

.site-footer h5 {
  color: var(--op-white);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}

.site-footer p,
.site-footer address {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
  line-height: 1.7;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.72);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--op-teal-500);
}

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

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

.site-footer .footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.site-footer .footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.site-footer .footer-contact svg {
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: var(--op-teal-500);
}

.social-icons {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.1rem;
}

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--op-white);
  transition: background-color var(--op-transition), border-color var(--op-transition), transform var(--op-transition);
}

.social-icons a:hover,
.social-icons a:focus-visible {
  background-color: var(--op-teal-500);
  border-color: var(--op-teal-500);
  color: var(--op-white);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--op-navy-700);
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Cards (shared across content pages)
   ========================================================================== */
.card-op {
  background-color: var(--op-white);
  border: 1px solid var(--op-line);
  border-radius: var(--op-radius);
  overflow: hidden;
  height: 100%;
  transition: transform var(--op-transition), box-shadow var(--op-transition), border-color var(--op-transition);
}

.card-op:hover {
  transform: translateY(-4px);
  box-shadow: var(--op-shadow-lg);
  border-color: var(--op-teal-500);
}

.card-op img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

/* ==========================================================================
   Hero slider (Ana Sayfa)
   ========================================================================== */
.hero-slider .carousel-item {
  height: 78vh;
  min-height: 460px;
  max-height: 760px;
}

.hero-slide {
  position: relative;
  height: 100%;
  background-image: var(--hero-bg-desktop);
  background-size: cover;
  background-position: center;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(13, 20, 28, 0.88) 0%, rgba(13, 20, 28, 0.55) 45%, rgba(13, 20, 28, 0.25) 100%),
    linear-gradient(0deg, rgba(13, 20, 28, 0.35) 0%, rgba(13, 20, 28, 0) 40%);
}

.hero-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 640px;
  color: var(--op-white);
}

.hero-content .eyebrow {
  color: var(--op-teal-500);
}

.hero-content h1 {
  color: var(--op-white);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  max-width: 520px;
}

.hero-slider .carousel-control-prev,
.hero-slider .carousel-control-next {
  width: 3.5rem;
  height: 3.5rem;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  background-color: rgba(13, 20, 28, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  opacity: 1;
  transition: background-color var(--op-transition), border-color var(--op-transition);
}

.hero-slider .carousel-control-prev {
  left: 1.25rem;
}

.hero-slider .carousel-control-next {
  right: 1.25rem;
}

.hero-slider .carousel-control-prev:hover,
.hero-slider .carousel-control-next:hover {
  background-color: var(--op-teal-500);
  border-color: var(--op-teal-500);
}

.hero-slider .carousel-control-prev-icon,
.hero-slider .carousel-control-next-icon {
  width: 1.1rem;
  height: 1.1rem;
}

@media (max-width: 767.98px) {
  .hero-slider .carousel-item {
    height: 66vh;
    min-height: 420px;
  }

  .hero-slider .carousel-control-prev,
  .hero-slider .carousel-control-next {
    width: 3rem;
    height: 3rem;
  }

  .hero-slide {
    background-image: var(--hero-bg-mobile);
    background-position: top center;
  }
}

/* ==========================================================================
   Static project cards + image modal
   ========================================================================== */
.project-card {
  cursor: pointer;
  border: none;
  padding: 0;
  text-align: left;
  width: 100%;
}

.project-card .project-card-title {
  padding: 1rem 1.1rem;
}

.project-card .project-card-title h3 {
  font-size: 1.02rem;
  margin: 0;
}

.project-modal .modal-content {
  background-color: var(--op-navy-900);
  border: none;
}

.project-modal .btn-close {
  filter: invert(1) grayscale(1) brightness(2);
  z-index: 2;
  position: relative;
}

.project-slider .carousel-item {
  height: 60vh;
  min-height: 320px;
}

.project-slider .carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background-color: var(--op-navy-800);
}

.project-slider .carousel-control-prev,
.project-slider .carousel-control-next {
  width: 3.25rem;
  height: 3.25rem;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  opacity: 1;
  transition: background-color var(--op-transition), border-color var(--op-transition);
}

.project-slider .carousel-control-prev {
  left: 1rem;
}

.project-slider .carousel-control-next {
  right: 1rem;
}

.project-slider .carousel-control-prev:hover,
.project-slider .carousel-control-next:hover {
  background-color: var(--op-teal-500);
  border-color: var(--op-teal-500);
}

.work-modal-image {
  display: block;
  width: 100%;
  height: 60vh;
  min-height: 320px;
  object-fit: contain;
  background-color: var(--op-navy-800);
}

@media (max-width: 575.98px) {
  .work-modal-image {
    height: 50vh;
  }
}

.project-modal-caption {
  padding: 1.1rem 1.5rem 1.5rem;
  color: var(--op-white);
  text-align: center;
}

.project-modal-caption h3 {
  color: var(--op-white);
  margin: 0;
}

@media (max-width: 575.98px) {
  .project-slider .carousel-item {
    height: 50vh;
  }
}

/* ==========================================================================
   Page sections
   ========================================================================== */
.page-section {
  padding: 4.5rem 0;
}

.page-hero {
  background-color: var(--op-navy-900);
  color: var(--op-white);
  padding: 3.5rem 0;
}

.page-hero .eyebrow {
  color: var(--op-teal-500);
}

.page-hero h1 {
  color: var(--op-white);
  margin-bottom: 0;
}

/* Construction work cards — image with title overlay */
.work-card {
  position: relative;
  border-radius: var(--op-radius);
  overflow: hidden;
  height: 260px;
  transition: transform var(--op-transition), box-shadow var(--op-transition);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--op-shadow-lg);
}

.work-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-card .work-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(13, 20, 28, 0.88) 0%, rgba(13, 20, 28, 0.1) 65%);
  display: flex;
  align-items: flex-end;
  padding: 1.1rem;
}

.work-card .work-card-overlay h3 {
  color: var(--op-white);
  font-size: 1.05rem;
  margin: 0;
}

/* Team member cards */
.team-card {
  text-align: center;
}

.team-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.team-card .card-body h3 {
  font-size: 1rem;
  margin-bottom: 0.15rem;
}

.team-card .card-body p {
  color: var(--op-ink-soft);
  font-size: 0.88rem;
  margin: 0;
}

/* Vision / Mission blocks */
.value-card {
  height: 100%;
  padding: 1.75rem;
  border-radius: var(--op-radius);
  background-color: var(--op-white);
  border: 1px solid var(--op-line);
  border-top: 3px solid var(--op-teal-500);
}

.value-card .value-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: var(--op-teal-100);
  color: var(--op-teal-600);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-info-card {
  padding: 1.5rem;
  border-radius: var(--op-radius);
  background-color: var(--op-navy-900);
  color: var(--op-white);
  height: 100%;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--op-navy-700);
}

.contact-info-item:last-of-type {
  border-bottom: none;
}

.contact-info-item .contact-info-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: rgba(58, 175, 179, 0.15);
  color: var(--op-teal-500);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-info-item .contact-info-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.15rem;
}

.contact-form-card {
  padding: 2rem;
  border-radius: var(--op-radius);
  background-color: var(--op-white);
  border: 1px solid var(--op-line);
}

.contact-form-card .form-label {
  font-weight: 500;
  font-size: 0.9rem;
}

.contact-form-card .form-control:focus {
  border-color: var(--op-teal-500);
  box-shadow: 0 0 0 0.2rem rgba(58, 175, 179, 0.18);
}

.contact-map {
  border-radius: var(--op-radius);
  overflow: hidden;
  border: 1px solid var(--op-line);
  line-height: 0;
}

.contact-map iframe {
  display: block;
  width: 100%;
}

@media (max-width: 575.98px) {
  .contact-map iframe {
    height: 320px;
  }
}

/* ==========================================================================
   WhatsApp floating button
   ========================================================================== */
.whatsapp-fab {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 1040;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background-color: var(--op-whatsapp);
  color: var(--op-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
  transition: transform var(--op-transition);
}

.whatsapp-fab:hover,
.whatsapp-fab:focus-visible {
  color: var(--op-white);
  transform: scale(1.06);
}

.whatsapp-fab::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--op-whatsapp);
  animation: op-pulse 2.4s ease-out infinite;
}

@keyframes op-pulse {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

@media (max-width: 575.98px) {
  .whatsapp-fab {
    right: 1rem;
    bottom: 1rem;
    width: 52px;
    height: 52px;
  }
}