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

/* BODY */
body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Segoe UI', sans-serif;

  background: linear-gradient(135deg, #1e1b4b, #0f172a);
  color: white;

  transition: 0.4s;
}

/* 🌞 LIGHT MODE (FIXED - softer, not harsh) */
body.light {
  background: linear-gradient(135deg, #ad8eec, #9d75ed);
  color: #111;
}

/* CARD */
.container {
  width: 340px;
  padding: 30px;
  border-radius: 20px;
  text-align: center;

  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(18px);

  border: 1px solid rgba(255,255,255,0.1);

  box-shadow: 
    0 10px 30px rgba(0,0,0,0.4),
    0 0 10px rgba(168,85,247,0.1);

  transition: 0.4s;
}

/* LIGHT CARD */
body.light .container {
  background: rgba(227, 223, 223, 0.65);
  backdrop-filter: blur(20px);

  box-shadow: 
    0 10px 25px rgba(0,0,0,0.1),
    0 0 15px rgba(99,102,241,0.15);
}

/* TITLE */
h1 {
  margin-bottom: 10px;
  letter-spacing: 1px;

  transition: 0.3s;
}

/* TIME TEXT */
.real-time, .end-time {
  font-size: 13px;
  margin: 4px 0;
  opacity: 0.85;
}

/* INPUTS */
.inputs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 15px 0;
}

.inputs input {
  width: 60px;
  padding: 8px;
  border-radius: 8px;
  border: none;
  text-align: center;

  background: rgba(0,0,0,0.4);
  color: white;

  outline: none;
  transition: 0.3s;
}

/* Input focus glow */
.inputs input:focus {
  box-shadow: 0 0 6px #a855f7;
}

/* LIGHT INPUT */
body.light .inputs input {
  background: white;
  color: black;
}

/* BUTTONS */
button {
  padding: 10px 18px;
  margin: 8px;
  border: none;
  border-radius: 10px;
  cursor: pointer;

  background: linear-gradient(45deg, #6366f1, #a855f7);
  color: white;

  transition: 0.3s;
}

button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 10px rgba(168,85,247,0.5);
}

/* CIRCLE */
.circle {
  position: relative;
  margin: 25px auto;
  width: 220px;
}

svg {
  transform: rotate(-90deg);
}

/* BACK RING */
.bg {
  fill: none;
  stroke: rgba(255,255,255,0.2);
  stroke-width: 10;
}

/* PROGRESS */
#progress {
  fill: none;
  stroke: #8b5cf6;
  stroke-width: 10;
  stroke-linecap: round;

  transition: stroke-dashoffset 1s linear;
  filter: drop-shadow(0 0 6px #a855f7);
}

/* TIME TEXT */
#timeText {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 18px;
  font-weight: bold;
}

/* THEME BUTTON */
.theme-btn {
  position: fixed;
  top: 30px;
  right: 20px;

  padding: 15px 17px;
  border-radius: 12px;
  border: none;
  cursor: pointer;

  background: linear-gradient(45deg, #6366f1, #a855f7);
  color: white;

  transition: 0.3s;
}

.theme-btn:hover {
  transform: scale(1.1);
}

/* MODE BUTTON */
.mode-btn {
  position: fixed;
  top: 100px;
  right: 20px;

  padding: 15px;
  border-radius: 10px;
  border: none;

  background: linear-gradient(45deg, #8922c5, #4b3385);
  color: black;
  cursor: pointer;

  transition: 0.3s;
}

.mode-btn:hover {
  transform: scale(1.1);
}

/* HIDDEN */
.hidden {
  display: none;
}

/* STOPWATCH */
#stopwatchDisplay {
  font-size: 28px;
  margin: 20px 0;
  font-weight: bold;
}

.mode-btn{
  size: 150%;
}