#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; }
@media (max-width: 480px) { #mainHeading { font-size: 1.5rem !important; } .input-box input { width: 75px !important; } }