/* ===== Variables ===== */
:root {
  --bg-deep: #0a0e17;
  --bg-panel: rgba(12, 18, 32, 0.85);
  --navy: #0f1629;
  --neon-cyan: #00d4ff;
  --neon-blue: #0099ff;
  --neon-glow: rgba(0, 212, 255, 0.5);
  --accent-orange: #ff6b35;
  --accent-orange-glow: rgba(255, 107, 53, 0.6);
  --text-primary: #e8f4fc;
  --text-muted: rgba(232, 244, 252, 0.65);
  --border-glow: rgba(0, 212, 255, 0.35);
  --font-main: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* ===== Background Effects ===== */
.noise {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}

.grid-bg {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 0%, rgba(0, 153, 255, 0.03) 50%, transparent 100%),
    linear-gradient(90deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 0;
}

/* ===== Header & Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glow);
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.15rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  border-radius: 8px;
  box-shadow: 0 0 20px var(--neon-glow);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 20px var(--neon-glow);
}

.lang-switcher {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.lang-switcher a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.lang-switcher a:hover,
.lang-switcher a.lang-active {
  color: var(--neon-cyan);
}

.lang-sep {
  margin: 0 0.35rem;
  opacity: 0.6;
}

.nav-cta {
  padding: 0.6rem 1.25rem;
  background: transparent;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: var(--font-main);
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  transition: box-shadow var(--transition), background var(--transition);
}

.nav-cta:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 24px var(--neon-glow);
}

/* ===== Hero & Display Panel ===== */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 2rem 4rem;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

/* Display panel — the "tablet" / holographic screen */
.display-panel {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow:
    0 0 0 1px rgba(0, 212, 255, 0.2),
    0 0 60px rgba(0, 212, 255, 0.08),
    inset 0 0 60px rgba(0, 212, 255, 0.03);
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.display-panel::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--neon-cyan), transparent 40%, transparent 60%, var(--neon-blue));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.6;
  pointer-events: none;
}

/* Central AI graphic — concentric rings + pulse */
.central-graphic {
  position: relative;
  width: 200px;
  height: 200px;
  flex-shrink: 0;
}

.core-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--neon-cyan);
  border-radius: 50%;
  opacity: 0.6;
  animation: ring-pulse 3s ease-in-out infinite;
}

.core-ring-1 { transform: scale(1); animation-delay: 0s; }
.core-ring-2 { transform: scale(0.75); animation-delay: 0.2s; }
.core-ring-3 { transform: scale(0.5); animation-delay: 0.4s; }

.core-lines {
  position: absolute;
  inset: 10%;
  background: repeating-conic-gradient(
    from 0deg at 50% 50%,
    transparent 0deg 10deg,
    rgba(0, 212, 255, 0.15) 10deg 20deg
  );
  border-radius: 50%;
  animation: rotate-slow 20s linear infinite;
}

.core-pulse {
  position: absolute;
  inset: 25%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
  animation: pulse 2s ease-in-out infinite;
}

.core-center {
  position: absolute;
  inset: 35%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-cyan);
  filter: drop-shadow(0 0 12px var(--neon-glow));
}

.core-center svg {
  width: 100%;
  height: 100%;
}

@keyframes ring-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

@keyframes rotate-slow {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* Cards stack */
.cards-stack {
  flex: 1;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card {
  position: relative;
  background: rgba(15, 22, 41, 0.7);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

.card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Highlighted card — "Gizli & Güvenli" with orange/red glow */
.card-highlight {
  border-color: var(--accent-orange);
  box-shadow:
    0 0 0 1px rgba(255, 107, 53, 0.3),
    0 0 30px var(--accent-orange-glow),
    inset 0 0 20px rgba(255, 107, 53, 0.05);
}

.card-highlight:hover {
  box-shadow:
    0 0 0 1px rgba(255, 107, 53, 0.5),
    0 0 40px var(--accent-orange-glow),
    inset 0 0 24px rgba(255, 107, 53, 0.08);
}

.card-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-orange);
}

/* Hero text */
.hero-text h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 420px;
  margin-bottom: 1.5rem;
}

.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-main);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  color: var(--bg-deep);
  border: none;
  overflow: hidden;
}

.btn-primary .btn-glow {
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
  filter: blur(12px);
  opacity: 0.5;
  z-index: -1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--neon-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--neon-cyan);
  border: 1px solid var(--border-glow);
}

.btn-ghost:hover {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

/* ===== Features Section ===== */
.section {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--text-primary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.08);
}

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

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 2;
  padding: 2rem;
  border-top: 1px solid var(--border-glow);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.8;
}

.footer a {
  color: var(--neon-cyan);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* ===== Touch highlight for card (like in the image) ===== */
.card-highlight::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(255, 107, 53, 0.15) 0%,
    transparent 70%
  );
  pointer-events: none;
}