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

/* BODY */
body {
  font-family: 'Orbitron', sans-serif;
  background: #020617;
  color: #e2e8f0;
  text-align: center;
  min-height: 100vh;
  overflow-x: hidden;
}

/* BACKGROUND GLOW EFFECT */
body::before {
  content: "";
  position: fixed;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #38bdf8, transparent);
  top: -100px;
  left: -100px;
  filter: blur(120px);
  opacity: 0.3;
  z-index: -1;
}

/* HEADER */
header {
  padding: 15px;
  background: rgba(2, 6, 23, 0.6);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(56,189,248,0.2);
}

/* NAV BUTTONS */
nav button {
  margin: 6px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid rgba(56,189,248,0.3);
  background: transparent;
  color: #38bdf8;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

nav button:hover {
  background: #38bdf8;
  color: #020617;
  box-shadow: 0 0 15px #38bdf8, 0 0 30px #38bdf8;
}

/* ACTIVE TAB GLOW */
nav button.active {
  background: #38bdf8;
  color: #020617;
  box-shadow: 0 0 20px #38bdf8;
}

/* TOOL SECTIONS */
.tool {
  display: none;
  padding: 30px 20px;
  animation: fadeIn 0.5s ease;
}

.tool.active {
  display: block;
}

/* MAIN DISPLAY */
#timer-display,
#stopwatch-display {
  font-size: 4rem;
  margin: 30px 0;
  color: #38bdf8;
  text-shadow: 
    0 0 10px #38bdf8,
    0 0 20px #38bdf8,
    0 0 40px #0ea5e9;
}

/* BUTTONS */
.controls button {
  margin: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  color: #020617;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.controls button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px #38bdf8;
}

/* INPUTS */
input, textarea {
  background: rgba(30, 41, 59, 0.4);
  border: 1px solid rgba(56,189,248,0.3);
  color: #e2e8f0;
  padding: 10px;
  border-radius: 8px;
  margin: 10px 0;
  width: 90%;
  outline: none;
}

input:focus, textarea:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 10px #38bdf8;
}

/* TEXTAREA */
textarea {
  height: 150px;
  resize: none;
}

/* FOOTER */
footer {
  margin-top: 40px;
  padding: 15px;
  color: #94a3b8;
}

/* ADS */
.ads {
  margin-top: 15px;
  padding: 12px;
  border: 1px dashed rgba(56,189,248,0.3);
  border-radius: 8px;
}

/* ANIMATION */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}