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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f9f9f9;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
  font-size: 1.8rem;
  font-weight: bold;
}

.logo span {
  color: #ffd700;
}

nav ul {
  display: flex;
  list-style: none;
}

nav li {
  margin-left: 2rem;
}

nav a {
  color: white;
  text-decoration: none;
  transition: color 0.3s;
}

nav a:hover {
  color: #ffd700;
}

.hero {
  padding: 4rem 0;
  text-align: center;
  background: url('server_room.jpg') no-repeat center center/cover;
  color: white;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  color: #ddd;
}

.btn {
  display: inline-block;
  background: linear-gradient(to right, #667eea, #764ba2);
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.features {
  padding: 4rem 0;
  background: white;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2rem;
  color: #2c3e50;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #667eea;
}

footer {
  background: #2c3e50;
  color: white;
  text-align: center;
  padding: 2rem 0;
  margin-top: 2rem;
}

.login-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-form {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.login-form h2 {
  margin-bottom: 1.5rem;
  text-align: center;
  color: #2c3e50;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: #555;
}

.form-group input {
  width: 100%;
  padding: 0.7rem;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 1rem;
}

.close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: white;
}

.remember-me {
    margin: 1rem 0;
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    font-size: 0.9rem;
    color: #666;
}

.checkbox-label input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #ccc;
    border-radius: 3px;
    margin-right: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label:hover .checkmark {
    border-color: #007bff;
}

.checkbox-label input:checked ~ .checkmark {
    background-color: #007bff;
    border-color: #007bff;
}

.checkbox-label input:checked ~ .checkmark::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}