.tutorial-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--primary-color);
    font-weight: 500;
    border-bottom: 1px solid transparent;
}

.tutorial-link:hover {
    border-bottom-color: var(--primary-color);
}

.meditation-app {
    max-width: 600px;
    margin: 0 auto;
}

.duration-selector {
    background-color: var(--white);
    border-radius: 16px;
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.duration-selector h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 20px;
    text-align: center;
}

.duration-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.preset-btn {
    padding: 12px 20px;
    background-color: var(--bg-color);
    border: 2px solid transparent;
    border-radius: 10px;
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition);
}

.preset-btn:hover {
    border-color: var(--primary-color);
    background-color: var(--accent-color);
}

.preset-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.custom-duration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.custom-duration label {
    color: #64748B;
    font-size: 0.95rem;
}

.custom-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-input-group input {
    width: 70px;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    color: var(--text-color);
}

.custom-input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.custom-input-group span {
    color: #64748B;
}

.timer-visual {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.meditation-circle {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.circle-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0.8;
    animation: none;
}

.circle-glow.breathing {
    animation: breatheGlow 4s ease-in-out infinite;
}

@keyframes breatheGlow {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
}

.circle-content {
    position: relative;
    width: 220px;
    height: 220px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timer-display {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 5px;
}

.timer-status {
    font-size: 1rem;
    color: #64748B;
    font-weight: 500;
}

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

.meditation-controls .btn {
    min-width: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.start-btn.running {
    background: linear-gradient(135deg, var(--secondary-color), #4CAF50);
}

.sound-options {
    background-color: var(--white);
    border-radius: 16px;
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.sound-options h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 20px;
    text-align: center;
}

.bell-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.bell-option {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    background-color: var(--bg-color);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.bell-option:hover {
    background-color: var(--accent-color);
}

.bell-option input {
    margin-right: 10px;
    accent-color: var(--primary-color);
}

.bell-label {
    font-size: 0.95rem;
    color: var(--text-color);
}

.preview-bell-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--accent-color);
    border-radius: 8px;
    color: var(--primary-color);
    font-weight: 600;
    transition: var(--transition);
}

.preview-bell-btn:hover {
    background-color: #D4EBF2;
}

.interval-bells {
    background-color: var(--white);
    border-radius: 16px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.interval-bells h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 20px;
    text-align: center;
}

.interval-setting {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.interval-setting label {
    color: #64748B;
}

.interval-setting select {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-color);
    background-color: var(--white);
    cursor: pointer;
}

.interval-setting select:focus {
    outline: none;
    border-color: var(--primary-color);
}

@media (max-width: 768px) {
    .meditation-circle {
        width: 240px;
        height: 240px;
    }

    .circle-content {
        width: 190px;
        height: 190px;
    }

    .timer-display {
        font-size: 2.5rem;
    }

    .bell-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .duration-presets {
        gap: 8px;
    }

    .preset-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .meditation-circle {
        width: 200px;
        height: 200px;
    }

    .circle-content {
        width: 160px;
        height: 160px;
    }

    .timer-display {
        font-size: 2rem;
    }

    .custom-duration {
        flex-direction: column;
        gap: 10px;
    }

    .meditation-controls {
        flex-direction: column;
    }

    .meditation-controls .btn {
        width: 100%;
    }

    .interval-setting {
        flex-direction: column;
        gap: 10px;
    }
}