:root {
  /* Renk Paleti: Göz yormayan, profesyonel ve taktiksel tonlar */
  --background-color: #1a2026; /* Koyu, desatüre lacivert-gri (Taktiksel Gri) */
  --form-background: rgba(45, 55, 72, 0.7); /* Yarı şeffaf panel rengi */
  --accent-color: #ffb74d; /* Uçak kokpitlerinde kullanılan Taktiksel Amber/Turuncu */
  --text-color: #e0e6eb; /* Göz yormayan kırık beyaz */
  --border-color: rgba(255, 183, 77, 0.3);
  --font-header: "Exo 2", sans-serif;
  --font-body: "Roboto Mono", monospace;
}

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

body {
  font-family: var(--font-body);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;

  /* Arka Plan: Karbon fiber dokusu */
  background-color: var(--background-color);
  background-image: linear-gradient(
      rgba(26, 32, 38, 0.8),
      rgba(26, 32, 38, 0.8)
    ),
    url("https://www.freeiconspng.com/uploads/carbon-fiber-png-background-2.png");
  background-size: cover;
  background-position: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 40px;
  background: var(--form-background);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 4px solid var(--accent-color);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  z-index: 2;
}

.logo-container {
  text-align: center;
  margin-bottom: 25px;
}

.logo-container i {
  font-size: 42px;
  color: var(--accent-color);
}

.login-container h1 {
  font-family: var(--font-header);
  font-size: 22px;
  text-align: center;
  margin-bottom: 30px;
  font-weight: 600;
  letter-spacing: 1px;
}

.input-group {
  position: relative;
  margin-bottom: 20px;
}

.input-group i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(224, 230, 235, 0.5);
  transition: color 0.3s ease;
}

.input-field {
  width: 100%;
  padding: 14px 15px 14px 50px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid transparent;
  border-bottom: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-family: var(--font-body);
  font-size: 15px;
  transition: all 0.3s ease;
}

.input-field:focus {
  outline: none;
  border: 1px solid var(--accent-color);
  background: rgba(0, 0, 0, 0.1);
  box-shadow: 0 0 10px rgba(255, 183, 77, 0.2);
}

.input-field:focus + i {
  color: var(--accent-color);
}

.login-button {
  width: 100%;
  padding: 14px;
  background: var(--accent-color);
  border: none;
  border-radius: 4px;
  color: #111;
  font-family: var(--font-header);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: filter 0.3s ease, transform 0.2s ease;
}

.login-button:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.extra-links {
  text-align: center;
  margin-top: 25px;
}

.extra-links a {
  color: var(--text-color);
  font-size: 13px;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.3s ease, color 0.3s ease;
}

.extra-links a:hover {
  opacity: 1;
  color: var(--accent-color);
}

.footer-info {
  position: absolute;
  bottom: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(224, 230, 235, 0.5);
}