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

        body {
            font-family: 'Arial', sans-serif;
            background: #0f0f0f;
            color: #ffffff;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            position: relative;
        }

        .background-grid {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.02;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
            background-size: 40px 40px;
            animation: gridMove 30s linear infinite;
        }

        @keyframes gridMove {
            0% {
                transform: translate(0, 0);
            }

            100% {
                transform: translate(40px, 40px);
            }
        }

        .container {
            text-align: center;
            z-index: 2;
            position: relative;
            padding: 2rem;
        }

        .timer-wrapper {
            position: relative;
            display: inline-block;
            margin-bottom: 3rem;
        }

        .progress-ring {
            transform: rotate(-90deg);
            width: 300px;
            height: 300px;
        }

        .progress-ring-circle {
            stroke: rgba(255, 255, 255, 0.1);
            stroke-width: 6;
            fill: transparent;
            r: 145;
            cx: 150;
            cy: 150;
        }

        .progress-ring-progress {
            stroke: #ffffff;
            stroke-width: 6;
            fill: transparent;
            r: 145;
            cx: 150;
            cy: 150;
            stroke-dasharray: 911;
            stroke-dashoffset: 911;
            transition: stroke-dashoffset 1s ease;
            stroke-linecap: round;
        }

        .progress-ring-progress.work {
            stroke: darkslateblue;
        }

        .progress-ring-progress.break {
            stroke: #4ecdc4;
        }

        .timer-display {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .time {
            font-size: 3.5rem;
            font-weight: 200;
            letter-spacing: 0.1em;
            margin-bottom: 0.5rem;
            font-variant-numeric: tabular-nums;
        }

        .session-type {
            font-size: 1rem;
            font-weight: 300;
            opacity: 0.7;
            text-transform: uppercase;
            letter-spacing: 0.2em;
        }

        .controls {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 2rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #ffffff;
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 300;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.1);
            transition: left 0.3s ease;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

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

        .btn.primary {
            border-color: #ff6b6b;
            color: #ff6b6b;
        }

        .btn.primary:hover {
            background: rgba(255, 107, 107, 0.1);
            border-color: #ff6b6b;
        }

        .settings {
            display: flex;
            gap: 2rem;
            justify-content: center;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .setting-group {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.5rem;
        }

        .setting-label {
            font-size: 0.8rem;
            font-weight: 300;
            opacity: 0.7;
            text-transform: uppercase;
            letter-spacing: 0.1em;
        }

        .setting-controls {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .setting-btn {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #ffffff;
            width: 32px;
            height: 32px;
            border-radius: 6px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: all 0.3s ease;
        }

        .setting-btn:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
        }

        .setting-value {
            font-size: 1rem;
            font-weight: 300;
            min-width: 3rem;
            text-align: center;
        }

        .stats {
            display: flex;
            gap: 2rem;
            justify-content: center;
            opacity: 0.6;
            flex-wrap: wrap;
        }

        .stat {
            text-align: center;
        }

        .stat-value {
            font-size: 1.5rem;
            font-weight: 200;
            margin-bottom: 0.25rem;
        }

        .stat-label {
            font-size: 0.8rem;
            font-weight: 300;
            text-transform: uppercase;
            letter-spacing: 0.1em;
        }

        .notification {
            position: fixed;
            top: 2rem;
            right: 2rem;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            padding: 1rem 1.5rem;
            backdrop-filter: blur(10px);
            transform: translateX(400px);
            transition: transform 0.3s ease;
            z-index: 100;
        }

        .notification.show {
            transform: translateX(0);
        }

        @media (max-width: 768px) {
            .progress-ring {
                width: 250px;
                height: 250px;
            }

            .progress-ring-circle,
            .progress-ring-progress {
                r: 120;
                cx: 125;
                cy: 125;
                stroke-dasharray: 754;
                stroke-dashoffset: 754;
            }

            .time {
                font-size: 2.5rem;
            }

            .container {
                padding: 1rem;
            }

            .settings,
            .controls,
            .stats {
                gap: 1rem;
            }
        }

        @keyframes pulse {

            0%,
            100% {
                opacity: 1;
            }

            50% {
                opacity: 0.5;
            }
        }

        .pulsing {
            animation: pulse 1s ease-in-out infinite;
        }