/* ==== Reset & Body ==== */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 15px;
  color: #ddd;
  background-color: #111;
  margin: 0;
}

/* ==== Header ==== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

.header .logo img {
  height: 40px;
  margin-right: 10px;
  border: none;
  box-shadow: none;
  background: transparent;
}

header nav a.btn,
header nav .dropdown-toggle {
  background: transparent !important;
  border: none !important;
  color: white !important;
  font-weight: bold;
  border-radius: 0;
  margin: 0 4px;
  padding: 6px 14px;
  font-size: 14px;
}

header nav a.btn:hover,
header nav .dropdown-toggle:hover {
  color: #ffd700 !important;
}

/* ==== Dropdown ==== */
.dropdown-menu {
  background-color: transparent !important;
  border: none !important;
  box-shadow: none !important;
}

.dropdown-item {
  color: white !important;
  font-weight: 500;
}

.dropdown-item:hover {
  background-color: rgba(255, 255, 255, 0.1) !important;
  color: #ffd700 !important;
}

/* ==== Header Notice ==== */
.header-notice {
  max-width: 800px;
  margin: 30px auto;
  text-align: center;
  background-color: #2d2d2d;
  padding: 25px 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
  line-height: 1.8;
  font-size: 18px;
}

.header-notice a {
  color: #2ecc71;
  text-decoration: none;
  font-weight: bold;
}

.header-notice a:hover {
  text-decoration: underline;
}

/* ==== Tool Card ==== */
.tool-card {
  background-color: white;
  border-radius: 10px;
  padding: 20px;
  width: 400px;
  margin: 40px auto;
  text-align: center;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.tool-image {
  width: 100%;
  border-radius: 5px;
  margin-bottom: 15px;
}

.tool-title {
  font-size: 20px;
  font-weight: 700;
  margin: 10px 0;
  color: #222;
}

.tool-select {
  width: 100%;
  padding: 8px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 2px solid #ccc;
  font-size: 15px;
}

.rent-button {
  background-color: #198754;
  color: white;
  border: none;
  width: 100%;
  padding: 10px;
  font-weight: bold;
  font-size: 15px;
  border-radius: 4px;
  cursor: pointer;
}

.rent-button:hover {
  background-color: #157347;
}

.guide-link {
  text-decoration: none;
  color: #007bff;
  font-weight: 600;
  font-size: 16px;
  display: inline-block;
}

.guide-link:hover {
  text-decoration: underline;
}

.guide-box {
  width: 100%;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

/* ==== Auth Form ==== */
.container.auth-form {
  max-width: 400px;
  margin: 60px auto;
  padding: 20px;
  background: #1e1e1e;
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(0,0,0,0.3);
  text-align: center;
}

.auth-form input,
.auth-form button {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 4px;
  margin: 10px 0;
}

.auth-form button {
  background: #28a745;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

/* ==== Footer ==== */
.footer-section {
  background-color: #111;
  color: #ccc;
  padding: 50px 30px 20px 30px;
}

.footer-section h5 {
  font-weight: bold;
  margin-bottom: 10px;
}

.footer-section p {
  font-size: 14px;
  line-height: 1.6;
}

.footer-section .copyright {
  text-align: center;
  font-size: 13px;
  color: #ccc;
  margin-top: 20px;
}

/* ==== Text Utilities ==== */
.text-aqua {
  color: #00ffff !important;
}

.h3, h3 {
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}