/* İSGOBEL — Logo renk paleti */
:root {
  --blue-dark: #004a99;
  --blue-mid: #0066b3;
  --teal: #2699b0;
  --green: #76b82a;
  --green-dark: #5a9420;
  --white: #ffffff;
  --gray-50: #f7fafc;
  --gray-100: #eef2f6;
  --gray-200: #dde4ec;
  --gray-600: #5a6b7d;
  --gray-800: #2d3748;
  --shadow: 0 4px 24px rgba(0, 74, 153, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 74, 153, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --font-heading: "Montserrat", system-ui, sans-serif;
  --font-body: "Open Sans", system-ui, sans-serif;
  --header-h: 80px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--white);
}

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

a {
  color: var(--blue-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
}

.brand:hover {
  color: inherit;
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 50%;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: 0.02em;
}

.brand-text small {
  font-size: 0.65rem;
  color: var(--gray-600);
  max-width: 200px;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.main-nav a {
  display: block;
  padding: 0.5rem 0.9rem;
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 8px;
}

.main-nav a:hover {
  background: var(--gray-100);
}

.nav-cta {
  background: var(--blue-dark) !important;
  color: var(--white) !important;
  margin-left: 0.5rem;
}

.nav-cta:hover {
  background: var(--blue-mid) !important;
  color: var(--white) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue-dark);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Hero */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 2rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 90% 20%, rgba(118, 184, 42, 0.12), transparent),
    radial-gradient(ellipse 70% 50% at 10% 80%, rgba(38, 153, 176, 0.1), transparent),
    linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  min-height: 420px;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: rgba(0, 74, 153, 0.08);
  color: var(--blue-dark);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--blue-dark);
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: var(--green);
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-primary {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

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

.btn-outline {
  background: transparent;
  color: var(--blue-dark);
  border-color: var(--blue-dark);
}

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

.btn-light {
  background: var(--white);
  color: var(--blue-dark);
}

.btn-light:hover {
  background: var(--gray-100);
  color: var(--blue-dark);
}

.btn-block {
  width: 100%;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-logo-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
}

.hero-logo-card img {
  width: min(280px, 100%);
  margin: 0 auto;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}

.stat {
  text-align: center;
  padding: 0.5rem;
}

.stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--blue-dark);
}

.stat span {
  font-size: 0.85rem;
  color: var(--gray-600);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header--left {
  text-align: left;
  margin-left: 0;
}

.section-header--light h2,
.section-header--light p {
  color: var(--white);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--blue-dark);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--gray-600);
}

/* About */
.about {
  background: var(--gray-50);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.about-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.about-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.about-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--blue-dark);
  margin-bottom: 0.75rem;
}

.about-card p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

/* Services */
.services {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--teal) 100%);
}

.services .section-tag {
  color: rgba(255, 255, 255, 0.85);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.service-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 1.75rem;
  border-radius: var(--radius);
  color: var(--white);
  transition: background 0.25s ease, transform 0.25s ease;
}

.service-card:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-3px);
}

.service-num {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  opacity: 0.6;
  display: block;
  margin-bottom: 0.75rem;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.service-card p {
  font-size: 0.9rem;
  opacity: 0.9;
  line-height: 1.5;
}

/* Enterprises */
.enterprises {
  background: var(--gray-50);
}

.enterprise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.enterprise-card {
  position: relative;
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  border-top: 4px solid var(--green);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.enterprise-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  background: var(--gray-100);
  border-radius: 14px;
  margin-bottom: 1rem;
}

.enterprise-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--blue-dark);
  margin-bottom: 0.6rem;
}

.enterprise-card p {
  font-size: 0.92rem;
  color: var(--gray-600);
  margin-bottom: 1rem;
}

.enterprise-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--teal);
  background: rgba(38, 153, 176, 0.1);
  border-radius: 999px;
}

/* İş Çok */
.is-cok-card {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  align-items: center;
  gap: 2rem;
  background: linear-gradient(135deg, var(--green) 0%, var(--teal) 100%);
  border-radius: var(--radius-lg);
  padding: 3rem;
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.is-cok-card .section-tag {
  color: rgba(255, 255, 255, 0.85);
}

.is-cok-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.is-cok-content > p {
  opacity: 0.95;
  max-width: 560px;
  margin-bottom: 1.75rem;
}

.is-cok-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.is-cok .btn-primary {
  background: var(--white);
  color: var(--blue-dark);
  border-color: var(--white);
}

.is-cok .btn-primary:hover {
  background: var(--gray-100);
  border-color: var(--gray-100);
}

.is-cok .btn-outline {
  color: var(--white);
  border-color: var(--white);
}

.is-cok .btn-outline:hover {
  background: var(--white);
  color: var(--teal);
}

.is-cok-note {
  margin-top: 1.25rem;
  font-size: 0.8rem;
  opacity: 0.85;
}

.is-cok-visual {
  font-size: 6rem;
  text-align: center;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1.5rem;
}

.news-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s ease;
}

.news-card:hover {
  box-shadow: var(--shadow-lg);
}

.news-card--featured {
  border-left: 4px solid var(--green);
  grid-row: span 1;
}

.news-card time {
  font-size: 0.8rem;
  color: var(--teal);
  font-weight: 600;
}

.news-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--blue-dark);
  margin: 0.5rem 0 0.75rem;
}

.news-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
}

.news-link {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.9rem;
}

/* CTA band */
.cta-band {
  padding: 3.5rem 0;
  background: var(--green);
}

.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.9);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-list {
  list-style: none;
  margin-top: 2rem;
}

.contact-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.contact-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--green);
  margin-bottom: 0.25rem;
}

.contact-form {
  background: var(--gray-50);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
}

.contact-form h3 {
  font-family: var(--font-heading);
  color: var(--blue-dark);
  margin-bottom: 1.5rem;
}

.form-row {
  margin-bottom: 1.25rem;
}

.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.35rem;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: var(--white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(38, 153, 176, 0.2);
}

.form-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--gray-600);
}

/* Footer */
.site-footer {
  background: var(--blue-dark);
  color: rgba(255, 255, 255, 0.85);
  padding-top: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-brand {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.footer-brand img {
  border-radius: 50%;
  flex-shrink: 0;
}

.footer-brand strong {
  color: var(--white);
}

.site-footer h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--white);
  margin-bottom: 1rem;
}

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

.site-footer li {
  margin-bottom: 0.5rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.8);
}

.site-footer a:hover {
  color: var(--green);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.85rem;
}

.footer-credit {
  opacity: 0.7;
}

/* Mobile */
@media (max-width: 992px) {
  .hero-grid,
  .about-grid,
  .services-grid,
  .enterprise-grid,
  .news-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .news-card--featured {
    border-left: none;
    border-top: 4px solid var(--green);
  }

  .is-cok-card {
    grid-template-columns: 1fr;
    padding: 2rem;
    text-align: center;
  }

  .is-cok-content > p {
    margin-inline: auto;
  }

  .is-cok-actions {
    justify-content: center;
  }

  .is-cok-visual {
    order: -1;
    font-size: 4rem;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav a {
    padding: 0.85rem 1rem;
  }

  .nav-cta {
    margin-left: 0;
    text-align: center;
  }

  .brand-text small {
    display: none;
  }

  .hero-visual {
    order: -1;
  }

  .hero-logo-card {
    padding: 1.25rem;
  }

  .hero-logo-card img {
    width: 200px;
  }

  .cta-band-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* Nav toggle animation */
.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}