body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #d4fc79, #96e6a1);
}

.container {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 40px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    text-align: center;
    animation: fadeIn 1s;
}

h1, h2 {
    color: #333;
}

textarea, input {
    width: 100%;
    margin: 15px 0;
    padding: 15px;
    border: none;
    border-radius: 10px;
    outline: none;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

button {
    padding: 15px 40px;
    font-size: 16px;
    background-color: #5e60ce;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background-color: #4e4fb3;
}

.hidden {
    display: none;
}

p {
    font-size: 18px;
    color: #555;
    margin-top: 20px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.time-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.time-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}

.time-unit input {
  width: 100%;
  padding: 10px 6px;
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: 10px;
  outline: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  -moz-appearance: textfield;
}

.time-unit input::-webkit-outer-spin-button,
.time-unit input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

.time-label {
  font-size: 11px;
  color: #888;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.time-sep {
  font-size: 28px;
  font-weight: 600;
  color: #ccc;
  padding-bottom: 20px;
  user-select: none;
}

.time-preview {
  font-size: 13px;
  color: #5e60ce;
  margin-top: 10px;
  font-weight: 500;
  min-height: 18px;
}

.error {
  font-size: 12px;
  color: red;
  margin-top: 4px;
  min-height: 16px;
}