:root {
  --color-white: #ffffff;
  --glass-bg: rgba(18, 18, 18, 0.22);
  --glass-border: rgba(255, 255, 255, 0.12);
  --shadow-dark: rgba(0, 0, 0, 0.35);
  --button-bg: rgba(0, 0, 0, 0.45);
  --button-hover: rgba(0, 0, 0, 0.65);
  --button-text: #d1d5db;
  --input-bg: rgba(255, 255, 255, 0.08);
  --transition: 0.3s ease;
  --radius: 24px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  padding-top: 40px;
  min-height: 100vh;
  font-family: 'Poppins', sans-serif;
  color: var(--color-white);
  background-color: #000;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  transition: background-image 1s ease;
  position: relative;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.main-header {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 2rem);
  max-width: 1200px;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 999;
}

.header-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  transition: var(--transition);
}

.header-logo:hover {
  opacity: 0.8;
  transform: translateY(-2px);
}

body::before {
  content: "";
  position: absolute;
  inset: 0;
  background:linear-gradient(to bottom,rgba(0, 0, 0, 0.15),rgba(0, 0, 0, 0.35));
  z-index: 0;
}

h1,h2,h3,h4,h5,h6 {
  font-weight: normal;
  line-height: 1.2;
}

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

ul,ol {
  list-style: none;
}

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

button,input,textarea,select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(18px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: 0 10px 40px var(--shadow-dark);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
}

.input-control {
  width: 100%;
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.15);
  background: var(--input-bg);
  color: var(--color-white);
  outline: none;
  transition: var(--transition);
}

.input-control::placeholder {
  color: rgba(255,255,255,0.7);
}

.input-control:focus {
  border-color: rgba(255,255,255,0.4);
}

.button-primary {
  width: 100%;
  padding: 1rem;
  border-radius: 14px;
  border: none;
  background: var(--button-bg);
  color: var(--button-text);
  font-weight: 600;
  transition: var(--transition);
}

.button-primary:hover {
  transform: scale(1.02);

  opacity: 0.95;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.hidden {
  opacity: 0;
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
}