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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #222632;
  --border: #2a2e3a;
  --text: #e4e4e7;
  --text-muted: #8b8d98;
  --accent: #6366f1;
  --accent-hover: #818cf8;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Login Page */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
}

.login-box h1 {
  font-size: 24px;
  text-align: center;
  margin-bottom: 4px;
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.login-box label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.login-box input[type="text"],
.login-box input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  margin-bottom: 16px;
}

.login-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-box button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.login-box button:hover {
  background: var(--accent-hover);
}

.login-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}

/* Hub Header */
.hub-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
}

.hub-header h1 {
  font-size: 20px;
  font-weight: 600;
}

.btn-logout {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.btn-logout:hover {
  background: var(--surface-hover);
  color: var(--text);
}

/* Hub Main / Tools Grid */
.hub-main {
  padding: 40px 32px;
  max-width: 900px;
  margin: 0 auto;
}

.tools-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}

.tool-card:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.tool-icon {
  font-size: 32px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 12px;
  flex-shrink: 0;
}

.tool-info {
  flex: 1;
}

.tool-info h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.tool-info p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.tool-arrow {
  font-size: 20px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color 0.15s, transform 0.15s;
}

.tool-card:hover .tool-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* Responsive */
@media (max-width: 600px) {
  .hub-main {
    padding: 24px 16px;
  }

  .tool-card {
    padding: 16px;
    gap: 14px;
  }

  .tool-icon {
    width: 44px;
    height: 44px;
    font-size: 24px;
  }
}