body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 320px;
}

h1 {
    margin-bottom: 5px;
    color: #ff6b6b;
}

.subtitle {
    font-size: 14px;
    color: #777;
    margin-bottom: 20px;
}

.goal-box input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-bottom: 20px;
}

.timer-display {
    font-size: 48px;
    font-weight: bold;
    color: #222;
    margin-bottom: 20px;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn {
    padding: 10px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
}

.btn.primary {
    background-color: #ff6b6b;
    color: white;
}

#pause-btn {
    background-color: #ffd93d;
    color: #333;
}

#reset-btn {
    background: #ff4757;
    color: white;
}

.counter {
    margin-top: 15px;
    font-size: 13px;
    color: #666;
}
.mode-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.mode-selector button {
    background-color: #f1f2f6;
     color: #2f3542;
    border: 2px solid #dfe4ea;
    padding: 8px 14px;
     border-radius: 20px;
    font-size: 13px;
     font-weight: 600;
cursor: pointer;
    transition: all 0.2s ease;
}

.mode-selector button:hover {
     background-color: #ced6e0;
    border-color: #ced6e0;
}

.mode-selector button.active {
     background-color: #ff4757;
    color: white;
      border-color: #ff4757;
}
body {
    background: linear-gradient(-45deg, #8652ee, #2f3ab8, #8c3ade, #566ce8);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}
.watermark {
    position: fixed;
    bottom: 15px;
    right: 20px;
    font-size: 12px;
    font-family: sans-serif;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer; /* click */
    letter-spacing: 0.5px;
}
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 40px 70px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(1px 1px at 90px 40px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 160px 120px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(1.5px 1.5px at 230px 200px, #ffffff, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 300px 300px;
    animation: flicker 4s infinite alternate;
    opacity: 0.8;
}

@keyframes flicker {
    0% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.9;
    }
    100% {
        opacity: 0.5;
    }
}
.stealth-btn {
    position: fixed;
    bottom: 15px;
    left: 20px;
    font-size: 14px;
    text-decoration: none;
    opacity: 1;
    transition: opacity 0.3s ease;
    color: white
}

.stealth-btn:hover {
    opacity: 1.0;
}
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
     display: flex;
    flex-direction: column;
    gap: 10px;
     z-index: 1000;
}

.achievement-toast {
     background-color: #2f3640;
    color: #fbc531;
     border: 2px solid #fbc531;
    padding: 12px 20px;
     border-radius: 8px;
    font-weight: bold;
     font-size: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
     transform: translateX(120%);
    transition: transform 0.4s ease-in-out;
}

.achievement-toast.show {
transform: translateX(0);
}