.sonapro-tl-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #333;
}

.sonapro-tl-header {
    text-align: center;
    margin-bottom: 60px;
}

.sonapro-tl-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #4c3775;
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
}

.sonapro-tl-subtitle {
    font-size: 1.15rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.sonapro-tl-wrapper {
    position: relative;
    margin-top: 40px;
}

/* Timeline Track (Horizontal) */
.sonapro-tl-line-wrapper {
    position: relative;
    width: 100%;
    height: 4px;
    margin-bottom: 25px;
}

.sonapro-tl-line-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #eef0f5;
    border-radius: 2px;
}

.sonapro-tl-line-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: #4c3775;
    width: 0%;
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 2px;
}

.sonapro-tl-steps-row {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-top: -15px;
    margin-bottom: 40px;
}

.sonapro-tl-step {
    flex: 1;
    text-align: center;
    cursor: pointer;
    position: relative;
    user-select: none;
    outline: none;
    transition: all 0.3s ease;
}

.sonapro-tl-node {
    width: 16px;
    height: 16px;
    background: #fff;
    border: 3px solid #eef0f5;
    border-radius: 50%;
    margin: 0 auto 12px;
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.sonapro-tl-step.is-active .sonapro-tl-node {
    border-color: #4c3775;
    transform: scale(1.2);
    box-shadow: 0 0 0 5px rgba(76, 55, 117, 0.15);
}

.sonapro-tl-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ccc;
    transition: color 0.3s ease;
    margin-bottom: 4px;
}

.sonapro-tl-step.is-active .sonapro-tl-num {
    color: #4c3775;
}

.sonapro-tl-badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    background: #f1f3f9;
    color: #666;
    border-radius: 12px;
    margin-bottom: 8px;
    transition: all 0.3s ease;
}

.sonapro-tl-step.is-active .sonapro-tl-badge {
    background: #4c3775;
    color: #fff;
}

.sonapro-tl-step-title {
    font-size: 1rem;
    font-weight: 600;
    color: #555;
    margin: 0;
    transition: color 0.3s ease;
}

.sonapro-tl-step.is-active .sonapro-tl-step-title {
    color: #1e1e1e;
}

/* Active Content Box */
.sonapro-tl-content-box {
    background: #fff;
    border: 1px solid #eaeaea;
    border-radius: 12px;
    padding: 40px;
    min-height: 180px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    position: relative;
    overflow: hidden;
}

.sonapro-tl-content-pane {
    position: absolute;
    top: 40px;
    left: 40px;
    right: 40px;
    opacity: 0;
    transform: translateY(15px);
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.sonapro-tl-content-pane.is-active {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.sonapro-tl-pane-keyword {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: #4c3775;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.sonapro-tl-pane-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 0 12px;
    color: #1e1e1e;
}

.sonapro-tl-pane-desc {
    font-size: 1.05rem;
    line-height: 1.6;
    color: #555;
    margin: 0;
}

/* Nav Arrows */
.sonapro-tl-nav-arrows {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 20px;
}

.sonapro-tl-nav-btn {
    background: #fff;
    border: 1px solid #e1e1e1;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #555;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.sonapro-tl-nav-btn:hover {
    border-color: #4c3775;
    color: #4c3775;
}

/* Responsive (Mobile/Tablet Stacked) */
@media (max-width: 768px) {
    .sonapro-tl-line-wrapper {
        display: none;
    }

    .sonapro-tl-steps-row {
        display: none;
    }

    .sonapro-tl-content-box {
        padding: 24px;
        box-shadow: none;
        border: none;
        background: transparent;
    }

    .sonapro-tl-content-pane {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        opacity: 1;
        transform: none;
        pointer-events: auto;
        margin-bottom: 30px;
        padding-left: 30px;
        border-left: 2px solid #eef0f5;
        transition: border-color 0.3s ease;
    }

    .sonapro-tl-content-pane:hover,\n    .sonapro-tl-content-pane.is-active {
        border-left-color: #4c3775;
    }

    .sonapro-tl-content-pane:last-child {
        margin-bottom: 0;
    }

    .sonapro-tl-pane-title {
        font-size: 1.4rem;
    }

    .sonapro-tl-nav-arrows {
        display: none;
    }
}