/* ============================================
   SYSTEM GATEWAY - STYLE.CSS
   Dijital İşletme Sistemi - Görsel Dil
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: #000000;
  color: #FFFFFF;
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  position: relative;
}

/* ---------- TYPOGRAPHY ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 400;
  letter-spacing: -0.02em;
}

p {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- GLOBAL LAYOUT ---------- */
.page-container {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
}

@media (max-width: 600px) {
  .page-container {
    padding: 0 24px;
  }
}

/* ---------- CORNER MOTIFS ---------- */
/* Sol alt köşe: + işareti */
.corner-motif-left {
  position: fixed;
  bottom: 40px;
  left: 40px;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.08);
  font-weight: 300;
  letter-spacing: 0;
  pointer-events: none;
  z-index: 10;
}

/* Sağ üst köşe: 4x4 grid */
.corner-motif-right {
  position: fixed;
  top: 40px;
  right: 40px;
  display: grid;
  grid-template-columns: repeat(4, 3px);
  grid-template-rows: repeat(4, 3px);
  gap: 4px;
  pointer-events: none;
  z-index: 10;
}

.corner-motif-right span {
  width: 3px;
  height: 3px;
  background-color: rgba(255, 255, 255, 0.06);
  border-radius: 0;
}

@media (max-width: 600px) {
  .corner-motif-left {
    bottom: 20px;
    left: 20px;
  }

  .corner-motif-right {
    top: 20px;
    right: 20px;
  }
}

/* ---------- SECTION BASE ---------- */
.section {
  padding: 120px 0;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.section:last-of-type {
  border-bottom: none;
}

.section-inner {
  position: relative;
  padding-left: 80px;
}

@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .section-inner {
    padding-left: 0;
  }
}

/* ---------- SYSTEM LABELS ---------- */
.sys-label {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.12);
  font-weight: 400;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .sys-label {
    position: relative;
    margin-bottom: 32px;
    display: block;
  }
}

/* ---------- HERO SECTION ---------- */
.hero {
  padding-top: 180px;
  padding-bottom: 160px;
}

.hero-title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 300;
  line-height: 1.35;
  max-width: 720px;
  margin-bottom: 48px;
  color: #FFFFFF;
}

.hero-subtitle {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  max-width: 420px;
}

@media (max-width: 600px) {
  .hero {
    padding-top: 100px;
    padding-bottom: 100px;
  }
}

/* ---------- SECTION HEADINGS ---------- */
.section-heading {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 56px;
  font-weight: 500;
}

/* ---------- LIST STYLES ---------- */
.statement-list {
  list-style: none;
  margin-bottom: 56px;
}

.statement-list li {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-left: 20px;
  position: relative;
}

.statement-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: rgba(255, 255, 255, 0.25);
}

.statement-list li:last-child {
  border-bottom: none;
}

.section-footer {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 48px;
  line-height: 1.8;
  max-width: 500px;
}

/* ---------- PRINCIPLES ---------- */
.principles-grid {
  display: grid;
  gap: 48px;
}

.principle {
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.principle:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.principle-title {
  font-size: 18px;
  font-weight: 400;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.principle-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  max-width: 560px;
}

/* ---------- TWO COLUMN LAYOUT ---------- */
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

@media (max-width: 768px) {
  .two-columns {
    grid-template-columns: 1fr;
    gap: 56px;
  }
}

.column-title {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 32px;
  font-weight: 500;
}

.column-list {
  list-style: none;
}

.column-list li {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  padding: 12px 0;
  padding-left: 16px;
  position: relative;
}

.column-list li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: rgba(255, 255, 255, 0.3);
}

/* ---------- CONTACT / FOOTER ---------- */
.contact-section {
  padding: 140px 0 100px;
  text-align: center;
}

.contact-section .section-inner {
  padding-left: 0;
}

.contact-text {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  max-width: 480px;
  margin: 0 auto 24px;
}

.contact-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 48px;
}

.contact-email {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

.contact-email:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- GATEWAY BUTTON ---------- */
/* Mimari geçit butonu: Sessiz, ciddi, iki alan arası köprü */
.gateway-wrapper {
  text-align: center;
  margin-top: 64px;
}

.gateway-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-family: inherit;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: all 0.4s ease;
  cursor: pointer;
}

.gateway-button:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.9);
  color: #FFFFFF;
}

.gateway-button .arrow {
  font-size: 11px;
  opacity: 0.5;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.gateway-button:hover .arrow {
  transform: translateX(3px);
  opacity: 0.8;
}

/* Footer gateway: Daha küçük, daha sessiz */
.footer-gateway {
  margin-top: 48px;
}

.footer-gateway .gateway-button {
  padding: 10px 20px;
  font-size: 12px;
  border-color: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.4);
}

.footer-gateway .gateway-button:hover {
  border-color: rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- RESPONSIVE FINE-TUNING ---------- */
@media (max-width: 480px) {
  .hero-title {
    font-size: 24px;
  }

  .statement-list li {
    font-size: 15px;
    padding: 14px 0 14px 16px;
  }

  .principle-title {
    font-size: 16px;
  }

  .principle-text {
    font-size: 14px;
  }

  .contact-text {
    font-size: 15px;
  }
}

/* ---------- SELECTION STYLE ---------- */
::selection {
  background-color: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
}

/* ---------- SCROLLBAR (WEBKIT) ---------- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #000000;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}