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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.timer-app {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.app-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.app-header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.app-header p {
    opacity: 0.9;
    font-weight: 300;
}

/* Timer Display */
.timer-display {
    padding: 40px 20px;
    display: flex;
    justify-content: center;
    background: #f8f9fa;
}

.time-circle {
    position: relative;
    width: 300px;
    height: 300px;
}

.progress-ring-circle {
    stroke: #667eea;
    stroke-linecap: round;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    transition: stroke-dashoffset 0.1s linear;
}

.time-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 100%;
}

#displayTime {
    font-size: 3rem;
    font-weight: 700;
    color: #2d3748;
    font-variant-numeric: tabular-nums;
    margin-bottom: 10px;
}

.timer-status {
    font-size: 1rem;
    color: #667eea;
    font-weight: 500;
    margin-top: 15px;
}

/* Start Timer Button in Circle */
.start-timer-btn {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    margin-top: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(72, 187, 120, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
    margin: 15px auto 0;
}

.start-timer-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
}

.start-timer-btn:active {
    transform: translateY(0);
}

.start-timer-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Input Section */
.input-section {
    padding: 30px;
    border-bottom: 1px solid #e9ecef;
}

.time-inputs {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 25px;
}

.input-group {
    text-align: center;
    flex: 1;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 500;
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1.2rem;
    text-align: center;
    font-weight: 600;
    transition: all 0.3s ease;
    outline: none;
}

.input-group input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-group input::-webkit-outer-spin-button,
.input-group input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.preset-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.preset-btn {
    padding: 10px 20px;
    border: 2px solid #667eea;
    background: white;
    color: #667eea;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.preset-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Control Buttons */
.control-buttons {
    padding: 0 30px 30px;
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.control-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 100px;
    justify-content: center;
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.control-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.pause {
    background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
    color: white;
}

.resume {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
    color: white;
}

.reset {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    color: white;
}

/* Settings */
.settings {
    padding: 0 30px 30px;
    display: flex;
    justify-content: center;
}

.switch {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.switch input {
    display: none;
}

.slider {
    position: relative;
    width: 50px;
    height: 24px;
    background: #cbd5e0;
    border-radius: 24px;
    transition: all 0.3s ease;
}

.slider:before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: all 0.3s ease;
}

input:checked + .slider {
    background: #667eea;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.label-text {
    color: #4a5568;
    font-weight: 500;
}

/* Recent Timers */
.recent-timers {
    padding: 0 30px 30px;
}

.recent-timers h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #2d3748;
    font-weight: 600;
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 200px;
    overflow-y: auto;
}

/* Recent Timers with Delete Button */
.recent-item {
    background: #f7fafc;
    padding: 12px 16px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    gap: 10px;
}

.recent-content {
    flex: 1;
    cursor: pointer;
}

.recent-item:hover {
    background: #edf2f7;
    transform: translateX(5px);
}

.recent-time {
    font-weight: 600;
    color: #2d3748;
    font-variant-numeric: tabular-nums;
    margin-bottom: 4px;
}

.recent-date {
    color: #718096;
    font-size: 0.85rem;
}

.delete-recent-btn {
    background: none;
    border: none;
    color: #a0aec0;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.delete-recent-btn:hover {
    background: #fed7d7;
    color: #e53e3e;
    transform: scale(1.1);
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 1s infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .app-header {
        padding: 20px;
    }
    
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .timer-display {
        padding: 20px;
    }
    
    .time-circle {
        width: 250px;
        height: 250px;
    }
    
    #displayTime {
        font-size: 2.5rem;
    }
    
    .start-timer-btn {
        padding: 12px 24px;
        font-size: 1rem;
        min-width: 120px;
    }
    
    .input-section, .control-buttons, .settings, .recent-timers {
        padding: 20px;
    }
    
    .time-inputs {
        gap: 10px;
    }
    
    .control-buttons {
        gap: 10px;
    }
    
    .control-btn {
        min-width: 80px;
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

/* Scrollbar */
.recent-list::-webkit-scrollbar {
    width: 6px;
}

.recent-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.recent-list::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.recent-list::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}