#timer-calc-wrapper {
    max-width: 100%;
    margin: 10px auto;
    text-align: center;
    font-family: 'Segoe UI', Arial, sans-serif;
    padding: 20px 10px;
    background-color: #f4f4f4;
    border-radius: 15px;
    box-sizing: border-box;
}

#mainHeading { 
    font-size: 1.8rem !important; 
    color: #00796b !important; 
    margin-bottom: 20px !important; 
}

.timer-card {
    background: #ffffff !important;
    padding: 40px 20px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

#timerDisplay {
    font-size: clamp(3.5rem, 15vw, 7.5rem) !important;
    font-weight: bold !important;
    color: #000000 !important;
    margin-bottom: 25px;
    font-family: 'Courier New', Courier, monospace !important;
    line-height: 1;
}

.timer-card.finished {
    background-color: #e0f7fa !important;
    border: 3px solid #00acc1;
}

.timer-card.finished #timerDisplay {
    color: #d32f2f !important;
    animation: blink 1s infinite;
}

@keyframes blink {
    50% { opacity: 0.5; }
}

.input-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.input-box label { 
    display: block; 
    font-size: 0.9rem;
    font-weight: bold; 
    margin-bottom: 8px; 
    color: #666 !important; 
}

.input-box input {
    width: 85px !important;
    padding: 12px !important;
    font-size: 1.4rem !important;
    text-align: center !important;
    border: 2px solid #00acc1 !important;
    border-radius: 10px !important;
    color: #000 !important;
    background: #fff !important;
}

.control-buttons { 
    display: flex; 
    gap: 15px; 
    justify-content: center; 
}

.control-buttons button {
    padding: 15px 30px !important;
    font-size: 1.1rem !important;
    font-weight: bold !important;
    border: none !important;
    border-radius: 12px !important;
    cursor: pointer;
    color: white !important;
    flex: 1;
    max-width: 160px;
}

#startPauseBtn { background-color: #4CAF50 !important; }
#startPauseBtn.pause { background-color: #ff9800 !important; }
#resetBtn { background-color: #2196F3 !important; }

/* Internal Links Grid */
#related-tools-section {
    margin-top: 30px;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 15px;
    text-align: left;
}

.related-title {
    font-size: 1.2rem !important;
    color: #00796b !important;
    margin-bottom: 15px !important;
    border-left: 4px solid #00acc1;
    padding-left: 10px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
}

.tool-link {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f3f4 !important;
    border: 1px solid #ddd !important;
    padding: 10px !important;
    border-radius: 8px !important;
    text-decoration: none !important;
    color: #1a73e8 !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    text-align: center;
    transition: all 0.2s ease;
}

.tool-link:hover {
    background-color: #e8f0fe !important;
    border-color: #1a73e8 !important;
    transform: translateY(-2px);
}

@media (max-width: 480px) {
    #mainHeading { font-size: 1.5rem !important; }
    .input-box input { width: 75px !important; }
    .links-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}