/* ================================================
   CSS CUSTOM PROPERTIES
================================================ */
:root {
  --color-primary:       #0C2340;
  --color-primary-light: #193D6A;
  --color-accent:        #B8943F;
  --color-accent-hover:  #C9A750;
  --color-surface:       #F7F9FC;
  --color-white:         #FFFFFF;
  --color-text:          #1D2B3D;
  --color-text-muted:    #5A6E8A;
  --color-border:        #E2E8F0;

  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;

  --shadow-sm:    0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:    0 4px 24px rgba(0,0,0,0.07);
  --shadow-lg:    0 8px 40px rgba(0,0,0,0.10);
  --shadow-hover: 0 8px 32px rgba(12,35,64,0.13);

  --radius:    10px;
  --radius-sm: 6px;
  --radius-lg: 16px;

  --container-max: 1200px;
  --container-pad: clamp(20px, 5vw, 80px);

  --nav-height: 72px;

  --transition:      200ms ease;
  --transition-slow: 600ms ease-out;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

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

ul { list-style: none; }
address { font-style: normal; }

/* ================================================
   FOCUS STYLES
================================================ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ================================================
   TYPOGRAPHY
================================================ */
h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1rem, 2vw, 1.125rem); }

p {
  color: var(--color-text);
}

/* ================================================
   LAYOUT UTILITIES
================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section {
  padding: clamp(72px, 10vw, 128px) 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: clamp(48px, 7vw, 80px);
}

.section-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.section-title {
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 54ch;
  margin: 0 auto;
  line-height: 1.7;
}

/* ================================================
   ANIMATIONS (IntersectionObserver — one-shot)
================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ================================================
   BUTTONS
================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition:
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    color var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-hover);
}

.btn-gold {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}
.btn-gold:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 4px 20px rgba(184,148,63,0.32);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.45);
}
.btn-outline-light:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.75);
}

.btn-full { width: 100%; }

/* ================================================
   NAVIGATION
================================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition:
    background-color var(--transition),
    backdrop-filter var(--transition),
    box-shadow var(--transition);
}

#site-header.scrolled {
  background-color: rgba(12,35,64,0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 2px 24px rgba(0,0,0,0.18);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: var(--nav-height);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-white);
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(255,255,255,0.82);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}
.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255,255,255,0.09);
}

.nav-cta {
  margin-left: 10px;
  padding: 10px 18px;
  font-size: 0.875rem;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  position: relative;
  z-index: 101;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================================================
   HERO
================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-height) + 64px) 0 80px;
}

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

.hero-pattern {
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-serif);
  color: var(--color-white);
  margin-bottom: 24px;
  line-height: 1.12;
}

.hero-title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.78);
  margin-bottom: 40px;
  max-width: 52ch;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}


/* ================================================
   HAKKIMIZDA
================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 7vw, 96px);
  align-items: start;
}

.about-text .section-eyebrow { margin-bottom: 14px; }
.about-text .section-title   { margin-bottom: 28px; }

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-text p:last-child { margin-bottom: 0; }

.about-values {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.value-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 22px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.value-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(184,148,63,0.25);
}

.value-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(184,148,63,0.09);
  border-radius: var(--radius-sm);
}

.value-item h3 {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.value-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ================================================
   HİZMETLER
================================================ */
.services-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
}

.service-card {
  flex: 0 0 calc(33.333% - 15px);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(184,148,63,0.28);
}

.service-icon {
  color: var(--color-accent);
  flex-shrink: 0;
  display: flex;
}

.service-card h3 {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

/* ================================================
   SÜREÇ (TIMELINE)
================================================ */
.process-timeline {
  display: flex;
  align-items: flex-start;
}

.process-step {
  flex: 1;
  padding: 0 16px;
  text-align: center;
}

.step-number {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 400;
  color: var(--color-accent);
  opacity: 0.22;
  line-height: 1;
  margin-bottom: 18px;
}

.step-content h3 {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.step-content p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 28ch;
  margin: 0 auto;
}

.process-connector {
  flex-shrink: 0;
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), rgba(184,148,63,0.2));
  align-self: center;
  margin-top: -56px;
}

/* ================================================
   REFERANSLAR
================================================ */
.refs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.ref-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 28px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  min-height: 120px;
}
.ref-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(184,148,63,0.35);
}

.ref-logo-img {
  max-width: 148px;
  max-height: 52px;
  width: auto;
  height: auto;
  object-fit: contain;
  /*
   * Herhangi bir rengi #0C2340 laciverde dönüştürür:
   * brightness(0) → siyah, contrast(0) → orta gri (128,128,128),
   * sepia+saturate → turuncu, hue-rotate(172deg) → mavi, brightness(0.25) → karart
   */
  filter: brightness(0) contrast(0) sepia(1) saturate(10) hue-rotate(172deg) brightness(0.25);
  transition: filter var(--transition);
}
.ref-card:hover .ref-logo-img {
  filter: brightness(0) contrast(0) sepia(1) saturate(10) hue-rotate(172deg) brightness(0.32);
}

/* ================================================
   İLETİŞİM
================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(40px, 5vw, 72px);
  align-items: start;
}

/* Form wrapper */
.contact-form-wrapper {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 48px);
  box-shadow: var(--shadow-md);
}

.form-message {
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
}
.form-message.success {
  background-color: #F0FDF4;
  color: #15803D;
  border: 1px solid #BBF7D0;
}
.form-message.error {
  background-color: #FFF1F2;
  color: #BE123C;
  border: 1px solid #FECDD3;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.required-mark { color: var(--color-accent); }

.form-group input:not([type="checkbox"]),
.form-group textarea {
  padding: 11px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background-color: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(90,110,138,0.55);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(12,35,64,0.08);
}
.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #E11D48;
}

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

.field-error {
  font-size: 0.8125rem;
  color: #E11D48;
  min-height: 18px;
  line-height: 1.4;
}

/* Checkbox */
.form-checkbox { margin-bottom: 22px; }

.checkbox-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.checkbox-row input[type="checkbox"] {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}
.checkbox-row label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  cursor: pointer;
  font-weight: 400;
}

/* Submit button spinner */
.btn-spinner {
  width: 17px;
  height: 17px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#submit-btn:disabled {
  opacity: 0.72;
  cursor: not-allowed;
}

/* Office cards */
.offices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}

.office-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.office-card h3 {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 10px;
}

.office-card address {
  font-size: 0.8375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 12px;
}

.office-map-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: gap var(--transition), color var(--transition);
}
.office-map-link:hover {
  gap: 7px;
  color: var(--color-accent-hover);
}

/* Direct contact links */
.contact-direct {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-direct-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}
.contact-direct-item:hover {
  color: var(--color-accent);
}

/* ================================================
   FOOTER
================================================ */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255,255,255,0.72);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo-link { text-decoration: none; }
.footer-logo-link .logo-text { font-size: 1rem; }

.footer-tagline {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  margin: 16px 0 22px;
  line-height: 1.7;
  max-width: 34ch;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}
.social-link:hover {
  color: var(--color-white);
  border-color: rgba(255,255,255,0.38);
  background-color: rgba(255,255,255,0.07);
}

.footer-nav h4,
.footer-contact-col h4 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 20px;
}

.footer-nav ul,
.footer-contact-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.62);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-white); }

.footer-contact-col li {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
}
.footer-contact-col a {
  color: rgba(255,255,255,0.62);
  transition: color var(--transition);
}
.footer-contact-col a:hover { color: var(--color-accent); }
.footer-contact-col address { margin-bottom: 4px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.38);
}

.footer-kvkk {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.38);
  transition: color var(--transition);
  white-space: nowrap;
}
.footer-kvkk:hover { color: rgba(255,255,255,0.72); }

.footer-credit img {
  display: block;
  filter: brightness(0) invert(1);
  opacity: 0.7;
  transition: opacity var(--transition);
}
.footer-credit:hover img { opacity: 1; }

/* ================================================
   RESPONSIVE — TABLET (≤ 1024px)
================================================ */
@media (max-width: 1024px) {
  .service-card { flex: 0 0 calc(50% - 11px); }
  .refs-grid    { grid-template-columns: repeat(2, 1fr); }
}

/* ================================================
   RESPONSIVE — TABLET / MOBILE (≤ 768px)
================================================ */
@media (max-width: 768px) {
  /* Nav */
  .nav-toggle { display: flex; }

  .nav-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99;
    background-color: var(--color-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 80px 32px 40px;
  }
  .nav-menu.open { display: flex; }

  .nav-link {
    font-size: 1.25rem;
    padding: 12px 28px;
    color: rgba(255,255,255,0.88);
    width: 100%;
    text-align: center;
  }

  .nav-cta {
    margin-left: 0;
    padding: 14px 32px;
    font-size: 1rem;
    margin-top: 8px;
    width: 100%;
    max-width: 280px;
    text-align: center;
  }

  /* About */
  .about-grid { grid-template-columns: 1fr; }

  /* Process — vertical */
  .process-timeline {
    flex-direction: column;
    align-items: stretch;
    padding-left: 20px;
  }

  .process-step {
    text-align: left;
    padding: 0 0 32px 28px;
    border-left: 2px solid rgba(184,148,63,0.25);
    position: relative;
  }
  .process-step:last-child { padding-bottom: 0; }

  .process-step::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 12px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-accent);
    border: 2px solid var(--color-white);
  }

  .step-number { text-align: left; font-size: 2.5rem; margin-bottom: 10px; }
  .step-content p { max-width: none; margin: 0; }

  .process-connector { display: none; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ================================================
   RESPONSIVE — MOBILE (≤ 540px)
================================================ */
@media (max-width: 540px) {
  /* Hero actions */
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Services */
  .service-card { flex: 0 0 100%; }

  /* Refs */
  .refs-grid { grid-template-columns: 1fr; }

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

  /* Offices */
  .offices-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ================================================
   RESPONSIVE — SMALL (≤ 375px)
================================================ */
@media (max-width: 375px) {
  :root { --container-pad: 16px; }
  .hero-title { font-size: 2rem; }
  .stat-number { font-size: 1.75rem; }
}